CRC · California Residential Code

How do state-agency adoption notes / matrix affect referenced standards?

In plain terms: the CRC prints many external standards and helpful “matrix” tables, but those lists don’t make a standard law everywhere. A referenced standard only becomes enforceable for your project when the state agency with authority for your occupancy actually adopts the CRC section (or appendix) that cites it — check the Matrix Adoption Table and the agency’s adopted text; also note the enforcing agency’s inspection duties listed in § R109.1.

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Last reviewed: July 6, 2026

What the code requires

The California Residential Code (CRC) uses Matrix Adoption Tables to show which state agencies have adopted or amended model-code chapters, sections or appendices. The matrices are expressly described as a non‑regulatory aid — they indicate adoption scope but do not by themselves make a standard mandatory; a state agency must adopt the chapter/section for those provisions (and any referenced standards) to apply for that agency’s regulated projects. See the CRC explanation of matrix tables and their non‑regulatory purpose.

The CRC’s inspections rules list the inspection subsections the enforcing agency must provide, including § R109.1.5 and § R109.1.6 among others; these are inspection obligations of the enforcing agency. The CRC text showing § R109.1 and the list of subsections is in the code.

The single most important rule: the matrix tells you what a state agency chose to adopt — only those adopted CRC sections (and the referenced standards inside them) become mandatory for that agency’s regulated work.

Note: the full text of § R109.1.5 and § R109.1.6 was not included in the retrieved files; the code pages we have show that those subsections are listed under R109.1 but the specific subsection language was not retrieved. Where I rely on a policy statement (matrix/appendix applicability, inspection list) I cite the retrieved CRC pages.

Requirements in detail

What “matrix adoption” is (and what it is not)

  • Matrix Adoption Tables are a non‑regulatory aid that indicate which state agencies have adopted the model code chapters/sections and whether they adopted them as-is, as amended, or not at all. Use the tables to determine whether a particular agency has adopted a chapter, or only specific sections.
  • An appendix or a listed referenced standard in the CRC is not automatically mandatory statewide just because it appears in the code book; it becomes mandatory only where the agency that regulates that occupancy or building application adopts it. The CRC appendices repeat this: appendix provisions “are not mandatory unless specifically adopted by a state agency or referenced in the adopting ordinance.”

How referenced standards become applicable

  • Referenced standards listed in CRC tables (Part IX / the referenced-standards tables) apply only to those CRC sections that are adopted by an agency. The CRC explicitly notes that referenced standards are applicable only to the CRC sections that are adopted.
  • The enforcing agency enforces CRC provisions only “to the extent of authority granted to such agency by the state legislature.” That affects whether an adopted standard can be enforced by that agency.

Decision‑relevant dimensions (table)

Decision dimension Typical values / answers How that changes whether a referenced standard applies Code Reference
Who is the adopting state agency? BSC, SFM, HCD, DSA, OSHPD, etc. Only the adopting agency’s projects/authority are bound by the adopted sections and referenced standards. Matrix Adoption Tables description
Scope of adoption Adopt entire chapter / Adopt chapter as amended / Adopt only listed sections If an agency marks X for the entire chapter, the chapter’s referenced standards apply to that agency’s regulated projects; if the agency adopts only specific sections, only those sections (and whichever referenced standards are inside them) apply. Matrix adoption rows and examples
Appendix status Appendix adopted by agency / not adopted Appendix provisions (and the standards they reference) are mandatory only if the agency adopted that appendix or a section that references the standard. Appendix adoption note (appendices non-mandatory unless adopted)
Referenced‑standards list Listed in Part IX / appendix referenced‑standards tables The Part IX list is a directory — the binding effect depends on whether the CRC section that references the standard was adopted for the project. Part IX—Referenced Standards note
Enforcement/inspection Enforcing agency has inspection duties (e.g., § R109.1 and its subsections) Inspections listed under § R109.1 are responsibilities of the enforcing agency regardless of matrix entries; but whether a referenced standard is enforceable as code depends on adoption. (The text of § R109.1.5/1.6 was not retrieved.) § R109.1 inspection list

Practical steps for a code user

  1. Identify the applicable state agency for your occupancy or project (Chapter 1 / the authorities table).
  2. Consult the Matrix Adoption Table for the relevant chapter/appendix to see if that agency adopted the material (X, X as amended, or only listed sections).
  3. If the agency adopted the CRC section that references an external standard, treat that external standard as mandatory for projects under that agency — otherwise treat the standard as informational only unless adopted by ordinance.
  4. For inspection requirements, see § R109.1 and follow the subsections the enforcing agency must inspect; note the enforcing agency’s authority limits.

Exceptions & special cases

  • State agencies sometimes adopt an entire chapter “as amended” and list amended sections. The matrix will show an adopt‑as‑amended indicator; you must read the agency’s amended text to see changes to referenced standards or enforcement.
  • Some agencies (Office of Statewide Health Planning & Development, Division of the State Architect, State Fire Marshal) have distinct statutory authority and may adopt selected sections differently; the CRC and other Titles call out that agency authority and special adoption notes. Always check the agency column in the matrix and Chapter 1 agency authority notes.
  • Appendices: many appendices explicitly state “not mandatory unless adopted” — an appendix can list standards (e.g., ASTM or UL references) that apply only when the appendix or its sections are adopted for that agency’s projects. Example: Appendix BH (automatic vehicular gates) references ASTM F2200 but appendix adoption is required to make that reference mandatory.

Common mistakes

  • Mistaking the matrix itself for a code adoption: the matrix is an aid, not the regulatory adoption instrument. Always confirm the agency’s actual adoption language.
  • Assuming a listed referenced standard in Part IX applies everywhere: Part IX is a directory; applicability follows adoption of the CRC section that cites the standard.
  • Failing to check the “adopted as amended” notes: an agency may adopt a section but in amended form that changes which standards or limits are enforceable.
  • Overlooking enforcement limits: an agency enforces only to the extent of authority granted by statute (Chapter 1 and agency authority notes).

Worked example — applying the rule with numbers

Scenario: You are designing an automatic vehicular gate at a state‑regulated hospital campus. Appendix BH (Automatic Vehicular Gates) includes the requirement that vehicular gates intended for automation comply with ASTM F2200—20 (see BH103.1 / BH104.1). The Appendix text (BH103.1 / BH104.1) and referenced‑standard entry are in the CRC.

Step 1 — Check the matrix for your agency: suppose OSHPD column shows X for CHAPTER BH (meaning OSHPD adopted the entire appendix). The matrix therefore makes the appendix provisions (including the ASTM F2200 requirement) mandatory for OSHPD projects. (Matrix example entries are explained in the code; the table shows X means “Adopt entire chapter.”)

Step 2 — Result: Because OSHPD adopted BH entirely, your gate design must comply with ASTM F2200—20. If OSHPD had not adopted BH (no X) or had only adopted BH103.2 (gate openers) but not BH103.1, then the ASTM F2200 requirement would not be mandatory for OSHPD projects (it might still be a recommended standard but not an enforceable requirement). The appendix language that appendices are “not mandatory unless adopted” supports this.

Numeric illustration (simple):

  • If matrix shows X for BH under OSHPD → ASTM F2200 is mandatory for 100% of OSHPD‑regulated vehicular gate installations on OSHPD sites.
  • If matrix shows no X (not adopted) → ASTM F2200 is not mandatory for OSHPD projects (0% mandatory) though it remains listed in the appendix’s referenced-standards table.

Related provisions

  • § R109.1 — Types of inspections; lists § R109.1.5 and § R109.1.6 among the inspection subsections the enforcing agency shall make.
  • § R109.1.1 — Foundation inspection (example of an inspection subsection in R109).
  • § R109.1.3 — Floodplain inspections (another inspection subsection referenced in R109.1).
  • § R108.6 — Work commencing before permit issuance (administrative section related to enforcement/inspections).
  • Part IX — Referenced Standards (the CRC directory of referenced standards; these standards are applicable only where the CRC section that cites them has been adopted).

Code references

Grounded in the retrieved California Residential Code — click a citation to read the verbatim passage:

  • CRC § G115 Medium relevance — show source text

    SECTION G115—REFERENCED STANDARDS

    G115.1 General. See Table G115.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title, and the section or sections of this appendix referenced in the standard.

    TABLE G115.1—REFERENCED STANDARDS Col2 Col3
    STANDARD ACRONYM STANDARD NAME SECTIONS HEREIN REFERENCED
    ASCE 24—14 Flood Resistant Design and Construction G104.1, G108.3, G108.4, G111.1, G112.1,
    G112.5, G112.6, G112.7, G113.1, G114.4
    HUD 24 CFR Part 3285 (2008) Manufactured Home Construction and Safety Standards G102
    CBC_—25_ California Building Code G103.2, G114.1, G114.3
    CRC_—25_ California Residential Code G109.2, G109.4, G109.5
    CEC_—25_ California Electrical Code G109.4, G114.6

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    CALIFORNIA BUILDING CODE – MATRIX ADOPTION TABLE

    APPENDIX H – SIGNS

    (Not adopted by state agencies)

    Adopting agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 Col17 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting agency BSC BSC-
    CG    		 SFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 6
    Adopt entire chapter
    Adopt entire chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter / Section

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    H SIGNS

    The provisions contained in this appendix are not mandatory unless specifically adopted by a state agency or referenced in the adopting ordinance.

    User notes:

  • CRC § 1.11.2.3 Medium relevance — show source text

    1.11.2.3 More restrictive fire and panic safety building standards.

    1.11.2.3.1 Any fire protection district organized pursuant to Health and Safety Code Part 2.7 (commencing with Section 13800) of Division 12 may adopt building standards relating to fire and panic safety that are more stringent than those building standards adopted by the State Fire Marshal and contained in the California Building Standards Code. For these purposes, the district board shall be deemed a legislative body and the district shall be deemed a local agency. Any changes or modifications that are more stringent than the requirements published in the California Building Standards Code relating to fire and panic safety shall be subject to Section 1.1.8.1.

    1.11.2.3.2 Any fire protection district that proposes to adopt an ordinance pursuant to this section shall, not less than 30 days prior to noticing a proposed ordinance for public hearing, provide a copy of that ordinance, together with the adopted findings made pursuant to Section 1.11.2.3.1, to the city, county, or city and county where the ordinance will apply. The city, county, or city and county may provide the district with written comments, which shall become part of the fire protection district’s public hearing record.

    1.11.2.3.3 The fire protection district shall transmit the adopted ordinance to the city, county, or city and county where the ordi- nance will apply. The legislative body of the city, county, or city and county may ratify, modify or deny an adopted ordinance and transmit its determination to the district within 15 days of the determination. Any modification or denial of an adopted ordinance shall include a written statement describing the reasons for any modifications or denial. No ordinance adopted by the district shall be effective until ratification by the city, county, or city and county where the ordinance will apply. Upon ratification of an adopted ordinance, the city, county or city and county shall file a copy of the findings of the district, and any findings of the city, county, or city and county, together with the adopted ordinance expressly marked and identified to which each finding refers, in accordance with Section 1.1.8.1(3).

    1.11.2.4 Request for alternate means of protection. Requests for approval to use an alternative material, assembly or materials, equipment, method of construction, method of installation of equipment or means of protection shall be made in writing to the enforcing agency by the owner or the owner’s authorized representative and shall be accompanied by a full statement of the condi- tions. Sufficient evidence or proof shall be submitted to substantiate any claim that may be made regarding its conformance. The enforcing agency may require tests and the submission of a test report from an approved testing organization as set forth in Title 19, California Code of Regulation, to substantiate the equivalency of the proposed alternative means of protection.

    When a request for alternate means of protection involves hazardous materials, the authority having jurisdiction may consider implementation of the findings and recommendations identified in a Risk Management Plan (RMP) developed in accordance with Title 19, Division 5, Chapter 2, Article 3.

    Approval of a request for use of an alternative material, assembly of materials, equipment, method of construction, method of installation of equipment or means of protection made pursuant to these provisions shall be limited to the particular case covered by request and shall not be construed as establishing any precedent for any future request.

  • CRC § 1.10.4 Medium relevance — show source text

    OSHPD 4 Office of Statewide Hospital Planning and Development (see Section 1.10.4)

    OSHPD 5 Office of Statewide Hospital Planning and Development (see Section 1.10.5)

    OSHPD 6 Office of Statewide Hospital Planning and Development (see Section 1.10.6)

    DPH Department of Public Health (see Section 1.7)

    AGR Department of Food and Agriculture (see Section 1.6)

    CEC California Energy Commission (see Section 100 in Part 6, the California Energy Code)

    CA Department of Consumer Affairs (see Section 1.4): Board of Barbering and Cosmetology Board of Examiners in Veterinary Medicine Board of Pharmacy Acupuncture Board Bureau of Household Goods & Services Structural Pest Control Board (SPCB)

    SL State Library (see Section 1.12)

    SLC State Lands Commission (see Section 1.14)

    DWR Department of Water Resources (see Section 1.13 of Chapter 1 of the California Plumbing Code in Part 5 of Title 24)

    The state agencies are available to answer questions about their adoptions. Contact information is provided on page iv of this code.

    To learn more about the use of this code refer to pages viii and ix. Training materials on the application and use of this code are available at the website of the California Building Standards Commission www.dgs.ca.gov/bsc.

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    California Matrix Adoption Tables

    Format of the California Matrix Adoption Tables

    The matrix adoption tables, examples of which follow, are non-regulatory aids intended to show the user which state agencies have adopted and/or amended given sections of the model code. An agency's statutory authority for certain occupancies or building applications determines which chapter or section may be adopted, repealed, amended or added. See Chapter 1, Division I, Sections 1.2 through 1.14 for agency authority, building applications and enforcement responsibilities.

    The side headings identify the scope of state agencies’ adoption as follows:

    Adopt the entire IRC chapter without state amendments.

    If there is an “X” under a particular state agency’s acronym on this row; this means that particular state agency has adopted the entire model code chapter without any state amendments.

    Example:

    CALIFORNIA RESIDENTIAL CODE-MATRIX ADOPTION TABLE

    CHAPTER 2 – DEFINITIONS AND ABBREVIATIONS (Matrix Adoption Tables are nonregulatory, intended only as an aid to the user. See Chapter 1 for state agency authority and building applications.)

  • CRC § 1.11. Medium relevance — show source text
    Adopting Agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 Col17 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting Agency BSC BSC-
    CG    		 SFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 6
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter / Section

    The state agency does not adopt sections identified with the following symbol: † The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.

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    APPENDIX C-30 2025 CALIFORNIA EXISTING BUILDING CODE

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    APPENDIX C—GUIDELINES FOR THE WIND RETROFIT OF EXISTING BUILDINGS

    CHAPTER C3

    REFERENCED STANDARDS

    SECTION C301—REFERENCED STANDARDS

    [BS] C301.1 General. See Table C301.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title, and the section or sections of this appendix that reference the standard.

    [BS] TABLE C301.1—REFERENCED STANDARDS Col2 Col3
    STANDARD ACRONYM STANDARD NAME SECTIONS HEREIN REFERENCED
    CBC—25 California Building Code C101.3, C103.2, C201.1, C201.2
    CRC—25 California Residential Code C101.2, C101.3, C103.2, C201.2

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    CALIFORNIA EXISTING BUILDING CODE – MATRIX ADOPTION TABLE

  • CRC § 4.6 Medium relevance — show source text
    1—REFERENCED STANDARDS Col2 Col3
    STANDARD
    ACRONYM    		 STANDARD NAME SECTIONS
    HEREIN REFERENCED
    ASTM C5—10 Standard Specification for Quicklime for Structural Purposes BK104.4.6
    ASTM C141/C141M—14 Standard Specification for Hydrated Hydraulic Lime for Structural Purposes BK104.4.6
    ASTM C206—14 Standard Specification for Finishing Hydrated Lime BK104.4.6
    ASTM C926—21 Specification for Appliance of Portland Cement-Based Plaster BK104.4.8
    ASTM C1707—11 Standard Specification for Pozzolanic Hydraulic Lime for Structural Purposes BK104.4.6
    ASTM E2392/E2392M—10(2016) Standard Guide for Design of Earthen Wall Building Systems BK104.4.3.2
    ASTM BS1, ASTM BS EN 459—15 Building Lime—Part 1: Definitions, Specifications and Conformity Criteria;
    Part 2: Test Methods    		 BK104.4.6

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    CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE APPENDIX BL – HEMP-LIME (HEMPCRETE) CONSTRUCTION

    (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

    Adopting agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting agency BSC BSC-
    CG    		 SFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
    Adopt entire chapter
    Adopt entire chapter as
    amended (amended
    sections listed below)    		 X
    Adopt only those sections
    that are listed below
    Chapter / Section
    BL 105 X

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    APPENDIX BL-2 2025 CALIFORNIA RESIDENTIAL CODE

  • CRC § 3401 Medium relevance — show source text

    Exception: Where approved by the building official, inspections of the production equipment, including 3D printer, and the fabrication process used in a single housing tract shall be conducted on the first building to be constructed, and on a selected number of subsequent buildings, where the same equipment, equipment operators and fabrication process are used on all buildings. The number of inspections to be performed shall be determined by the building official.

    SECTION BM106—REFERENCED STANDARDS

    BM106.1 General. See Table BM106.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, the standard title and the section or sections of this appendix that reference the standard.

    TABLE BM106.1—REFERENCED STANDARDS Col2 Col3
    STANDARD ACRONYM STANDARD NAME SECTIONS HEREIN REFERENCED
    UL 3401—19 Outline of Investigation for 3D Printed Building Construction BM103.1, BM103.2, BM104.2,
    BM104.3, BM104.4, BM105.1

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    CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

    APPENDIX BN – EXTENDED PLATE WALL CONSTRUCTION

    (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

    Adopting agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting agency BSC BSC-
    CG    		 SFM 1 2 1/AC ** AC** SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
    Adopt entire chapter
    Adopt entire chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter / Section

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    BN EXTENDED PLATE WALL CONSTRUCTION

    The provisions contained in this appendix are not mandatory unless specifically adopted by a state agency or referenced in the adopting ordinance.

  • CRC § 325 Medium relevance — show source text

    BH103.2 Vehicular gate openers. Vehicular gate openers, where provided, shall be listed in accordance with UL 325.

    SECTION BH104—REFERENCED STANDARDS

    BH104.1 General. See Table BH104.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, the standard title, and the section or sections of this appendix that reference the standard.

    TABLE BH104.1—REFERENCED STANDARDS Col2 Col3
    STANDARD
    ACRONYM    		 STANDARD NAME SECTIONS
    HEREIN REFERENCED
    ASTM F2200—20 Standard Specification for Automated Vehicular Gate Construction BH103.1
    UL 325—2017 Door, Drapery, Gate, Louver and
    Window Operations and Systems—with Revisions through February 2020    		 BH103.2

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    CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

    APPENDIX BI – LIGHT STRAW-CLAY CONSTRUCTION

    (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

    Adopting agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting agency BSC BSC-
    CG    		 SFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
    Adopt entire chapter
    Adopt entire chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter / Section

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  • CRC § 1.3. Medium relevance — show source text

    APPENDIX BI — LIGHT STRAW-CLAY CONSTRUCTION

    ments for mass walls in Table N1102.1.3. Walls with light straw-clay infill of densities less than 20 pounds per cubic foot (480.6 kg/m [3] ) shall meet the R-value requirements for wood frame walls in Table N1102.1.3.

    BI104.2 Thermal resistance. Light straw-clay shall be deemed to have a thermal resistance as specified in Table BI103.2.3.

    SECTION BI105—REFERENCED STANDARDS

    BI105.1 General. See Table BI105.1 for standards that are referenced in various section of this appendix. Standards are listed by the standard identification with the effective date, the standard title, and the section or sections of this appendix that reference this standard.

    TABLE BI105.1—REFERENCED STANDARDS Col2 Col3
    STANDARD ACRONYM STANDARD NAME SECTIONS HEREIN REFERENCED
    ASTM E2392/E2392M—10(2016) Standard Guide for Design of Earthen Wall Building Systems Table BI103.2.3

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    CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

    APPENDIX BJ – STRAWBALE CONSTRUCTION

    (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

    Adopting agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting agency BSC BSC-
    CG    		 SFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
    Adopt entire chapter X
    Adopt entire chapter as
    amended (amended
    sections listed below)    		 X
    Adopt only those sections
    that are listed below    		 X
    Chapter / Section
    BJ Note X
    BJ 107 X

    2025 CALIFORNIA RESIDENTIAL CODE APPENDIX BJ-1

  • CRC § 2025 Medium relevance — show source text

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    APPENDIX BH-2 2025 CALIFORNIA RESIDENTIAL CODE

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    BH AUTOMATIC VEHICULAR GATES

    The provisions contained in this appendix are not mandatory unless specifically adopted by a state agency or referenced in the adopting ordinance.

    User notes:

    About this appendix: Appendix BH provides requirements for automatic vehicular gates, including a definition of and references to standards that regulate such gates.

    SECTION BH101—GENERAL

    BH101.1 General. The provisions of this appendix shall control the design and construction of automatic vehicular gates installed on the lot of a one- or two-family dwelling.

    SECTION BH102—DEFINITION

    BH102.1 General. The following term shall, for the purposes of this appendix, have the meaning shown herein.

    VEHICULAR GATE. A gate that is intended for use at a vehicular entrance or exit to the lot of a one- or two-family dwelling, and that is not intended for use by pedestrian traffic.

    SECTION BH103—AUTOMATIC VEHICULAR GATES

    BH103.1 Vehicular gates intended for automation. Vehicular gates intended for automation shall be designed, constructed and installed to comply with the requirements of ASTM F2200.

    BH103.2 Vehicular gate openers. Vehicular gate openers, where provided, shall be listed in accordance with UL 325.

    SECTION BH104—REFERENCED STANDARDS

    BH104.1 General. See Table BH104.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, the standard title, and the section or sections of this appendix that reference the standard.

    TABLE BH104.1—REFERENCED STANDARDS Col2 Col3
    STANDARD
    ACRONYM    		 STANDARD NAME SECTIONS
    HEREIN REFERENCED
    ASTM F2200—20 Standard Specification for Automated Vehicular Gate Construction BH103.1
    UL 325—2017 Door, Drapery, Gate, Louver and
    Window Operations and Systems—with Revisions through February 2020    		 BH103.2

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    CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

    APPENDIX BI – LIGHT STRAW-CLAY CONSTRUCTION

    (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

  • CRC § 612.4 Medium relevance — show source text

    612.4 Adoption of the safety element. Prior to the adoption of its draft element or draft amendment, the board of supervisors of the county or the council of a city shall consider the recommendations, if any, made by the State Board of Forestry and Fire Protection and any local agency that provides fire protection to territory in the city or county. The board of supervisors or city council shall respond to the Board of Forestry and Fire Protection and any local agency providing fire protection in compliance with Government Code Section 65302.5(b)(3) and (b)(4) and Title 14, Division 1.5, Chapter 7, Article 6.

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    CALIFORNIA WILDLAND-URBAN INTERFACE CODE – MATRIX ADOPTION TABLE

    CHAPTER 7 – REFERENCED STANDARDS

    (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

    Adopting Agency BSC BSC-
    CG    		 SFM Col5 HCD Col7 Col8 DSA Col10 OSHPD Col12 Col13 Col14 Col15 Col16 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting Agency BSC BSC-
    CG    		 T-24 T-19* 1 2 1/AC AC SS 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended sections
    listed below)    		 X
    Adopt only those sections that
    are listed below
    [California Code of Regulations,
    Title 19, Division 1]
    Chapter / Section
    AASHTO HB-17—2002 X
    ASTM D638—2022 X
    ASTM D3909/D3909M_—2022_ X
    ASTM E84_—2023d_ X
    ASTM E119_—2022_ X
    ASTM E136_—2024a_ X
    ASTM E1354_—2023_ X
    _ASTM
  • CRC § 1.2.0 Medium relevance — show source text

    The state agencies are available to answer questions about their adoptions. Contact information is provided on page iv of this code.

    To learn more about the use of this code refer to the following pages. Training materials on the application and use of this code are available at the website of the California Building Standards Commission www.dgs.ca.gov/bsc.

    vi 2025 CALIFORNIA MECHANICAL CODE

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    CALIFORNIA MATRIX ADOPTION TABLES

    Format of the Matrix Adoption Tables The matrix adoption tables, examples of which follow, are non-regulatory aids intended to show the user which state agencies have adopted and/or amended given sections of model code. An agency’s statutory authority for certain occupancies or building applications determines which chapter or section may be adopted, repealed, amended or added. See Chapter 1, Division I, Sections 1.2.0 through 1.14.0, for agency authority, building application and enforcement responsibilities.

    The side headings identify the scope of the state agencies’ adoption as follows:

    Adopt the entire UMC chapter without state amendments.

    If there is an “X” under a particular state agency’s acronym in this row, it means that particular state agency has adopted the entire model code chapter without any state amendments.

    Example:

    CALIFORNIA MECHANICAL CODE – MATRIX ADOPTION TABLE

    CHAPTER 1 - GENERAL CODE PROVISIONS

    (Matrix Adoption Tables are non-regulatory, intended only as an aid to the user. See Chapter 1 for state agency authority and building application.)

    Adopting Agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 Col17 BSCC DPH AGR DWR CEC CA SL SLC



    Adopting Agency    		 BSC BSC-
    CG    		 SFM 1 2 1-AC AC ** SS** ** SS/CC** 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 6


    Adopt Entire Chapter    		 X


    Adopt Entire Chapter as
    amended (amended sections
    listed below)    		 S A M P L E


    Adopt only those sections
    that are listed below
    Chapter/Section
    202

    Adopt the entire UMC chapter as amended, state-amended sections are listed below: If there is an “X” under a particular state agency’s acronym in this row, it means that a particular state agency has adopted the entire model code chapter, with state amendments.

  • CRC § 2025 Medium relevance — show source text

    2025 CALIFORNIA RESIDENTIAL CODE APPENDIX CH-1

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    APPENDIX CH-2 2025 CALIFORNIA RESIDENTIAL CODE

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    CH PRIVATE SEWAGE DISPOSAL

    The provisions contained in this appendix are not mandatory unless specifically adopted by a state agency or referenced in the adopting ordinance.

    User notes:

    About this appendix: Appendix CH has one simple requirement that private sewage disposal systems must be in accordance with the International Private Sewage Disposal Code®.

    SECTION CH101—GENERAL

    CH101.1 Scope. Private sewage disposal systems shall conform to the International Private Sewage Disposal Code .

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    CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

    APPENDIX CI – SWIMMING POOL SAFETY ACT

    (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

    Adopting agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting agency BSC BSC-
    CG    		 SFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
    Adopt entire chapter X
    Adopt entire chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter / Section

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    CI SWIMMING POOL SAFETY ACT

  • CRC § 2019 Medium relevance — show source text

    CG104.1 Operation and maintenance manual. Nonsewered sanitation systems shall have an operation and maintenance manual provided by the manufacturer.

    CG105—SYSTEM OUTPUT

    CG105.1 General. The use or disposal of all substances exiting the nonsewered sanitation system shall be determined by the authority having jurisdiction.

    CG106—REFERENCED STANDARDS

    CG106.1 General. See Table CG106.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, the standard title and the section or sections of this appendix that reference the standard.

    TABLE CG106.1—REFERENCED STANDARDS Col2 Col3
    STANDARD
    ACRONYM    		 STANDARD NAME SECTIONS HEREIN
    REFERENCED
    ANSI/CAN/IAPMO/ISO 30500—2019 Non-sewered sanitation systems — Prefabricated integrated treatment units
    — General safety and performance requirements for design and testing    		 CG101.2

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    CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

    APPENDIX CH – PRIVATE SEWAGE DISPOSAL

    (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

    Adopting agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting agency BSC BSC-
    CG    		 SFM 1 2 1/AC ** AC** SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
    Adopt entire chapter
    Adopt entire chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter / Section

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    APPENDIX CH-2 2025 CALIFORNIA RESIDENTIAL CODE

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  • CRC § 1.55 Medium relevance — show source text

    SECTION BJ108—THERMAL INSULATION

    BJ108.1 R-value. The unit R-value of a strawbale wall with bales laid flat is R-1.55 for each inch of bale thickness. The unit R-value of a strawbale wall with bales on-edge is R-1.85 for each inch of bale thickness.

    BJ108.2 Compliance with Section R302.10.1. Straw bales meet the requirements for insulation materials in Section R302.10.1 for flame spread index and smoke-developed index as tested in accordance with ASTM E84.

    SECTION BJ109—REFERENCED STANDARDS

    BJ109.1 General. See Table BJ109.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, the standard title and the section or sections of this appendix that reference the standard.

    TABLE BJ109.1—REFERENCED STANDARDS Col2 Col3
    STANDARD
    ACRONYM    		 STANDARD NAME SECTIONS
    HEREIN REFERENCED
    ASTM C5—10 Standard Specification for Quicklime for Structural Purposes BJ104.4.6.1
    ASTM C109/C109M—2015el Standard Test Method for Compressive Strength of Hydraulic Cement Mortars BJ106.6.1
    ASTM C141/C141M—14 Standard Specification for Hydrated Hydraulic Lime for Structural Purposes BJ104.4.6.1
    ASTM C206—14 Standard Specification for Finishing Hydrated Lime BJ104.4.6.1
    ASTM C926—15B Standard Specification for Application of Portland Cement Based Plaster BJ104.4.8, BJ104.4.9
    ASTM C1707—11 Standard Specification for Pozzolanic Hydraulic Lime for Structural Purposes BJ104.4.6.1
    ASTM E84-21a Standard Test Method for Surface Burning Characteristics of Building Materials BJ108.2
    ASTM E2392/E2392M—10(2016) Standard Guide for Design of Earthen Wall Building Systems BJ104.4.3.2
    CEN EN 459—2015 Part 1: Building Lime. Definitions,
    Specifications and Conformity Criteria; Part 2: Test Methods    		 BJ104.4.6.1

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    CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE APPENDIX BK – COB CONSTRUCTION (MONOLITHIC ADOBE)

    (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

  • CRC § 1.1.11. Medium relevance — show source text

    APPENDIX C-30 2025 CALIFORNIA EXISTING BUILDING CODE

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    APPENDIX C—GUIDELINES FOR THE WIND RETROFIT OF EXISTING BUILDINGS

    CHAPTER C3

    REFERENCED STANDARDS

    SECTION C301—REFERENCED STANDARDS

    [BS] C301.1 General. See Table C301.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title, and the section or sections of this appendix that reference the standard.

    [BS] TABLE C301.1—REFERENCED STANDARDS Col2 Col3
    STANDARD ACRONYM STANDARD NAME SECTIONS HEREIN REFERENCED
    CBC—25 California Building Code C101.3, C103.2, C201.1, C201.2
    CRC—25 California Residential Code C101.2, C101.3, C103.2, C201.2

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    CALIFORNIA EXISTING BUILDING CODE – MATRIX ADOPTION TABLE

    APPENDIX D

    BOARD OF APPEALS

    Not adopted by the State of California (May be available for adoption by local ordinance. See Section 1.1.11.)

    Adopting Agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 Col17 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting Agency BSC BSC-
    CG    		 SFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 6
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter / Section

    The state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.

  • CRC § 10.4 Medium relevance — show source text

    10.4)_ OSHPD 5 Office of Statewide Hospital Planning and Development (see Section 1.10.5) OSHPD 6 Office of Statewide Hospital Planning and Development (see Section 1.10.6) DPH Department of Public Health (see Section 1.7.0) AGR Department of Food and Agriculture (see Section 1.6.0) CEC California Energy Commission (see Section 100 in Part 6, the California Energy Code) CA Department of Consumer Affairs (see Section 1.6.0): Board of Barbering and Cosmetology Board of Examiners in Veterinary Medicine Board of Pharmacy Acupuncture Board Bureau of Household Goods and Services

    Structural Pest Control Board SPCB

    SL State Library (see Section 1.12.0) SLC State Lands Commission (see Section 1.14.0) DWR Department of Water Resources (see Section 1.13.0 of Chapter 1 of the California Plumbing Code in Part 5 of Title 24)

    The state agencies are available to answer questions about their adoptions. Contact information is provided on page iv of this code.

    To learn more about the use of this code refer to the following pages. Training materials on the application and use of this code are available at the website of the California Building Standards Commission www.dgs.ca.gov/bsc.

    vi 2025 CALIFORNIA MECHANICAL CODE

    ), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

    CALIFORNIA MATRIX ADOPTION TABLES

    Format of the Matrix Adoption Tables The matrix adoption tables, examples of which follow, are non-regulatory aids intended to show the user which state agencies have adopted and/or amended given sections of model code. An agency’s statutory authority for certain occupancies or building applications determines which chapter or section may be adopted, repealed, amended or added. See Chapter 1, Division I, Sections 1.2.0 through 1.14.0, for agency authority, building application and enforcement responsibilities.

    The side headings identify the scope of the state agencies’ adoption as follows:

    Adopt the entire UMC chapter without state amendments.

    If there is an “X” under a particular state agency’s acronym in this row, it means that particular state agency has adopted the entire model code chapter without any state amendments.

    Example:

    CALIFORNIA MECHANICAL CODE – MATRIX ADOPTION TABLE

    CHAPTER 1 - GENERAL CODE PROVISIONS

    (Matrix Adoption Tables are non-regulatory, intended only as an aid to the user. See Chapter 1 for state agency authority and building application.)

  • CRC § 4.2 Medium relevance — show source text

    BF106.4.2 Deflection limit. For members supporting screen surfaces only, the total load deflection shall not exceed l /60. Screen surfaces shall be permitted to include not more than 25-percent solid flexible finishes. BF106.4.3 Roof live load. The roof live load shall be not less than 10 psf (0.479 kN/m [2] ).

    BF106.5 Footings. In areas with a frost line depth of zero, screen enclosures supported on a concrete slab-on-grade without footings shall conform to the provisions of Section R506, be not less than 3 [1] / 2 inches (89 mm) thick and the columns shall not support loads in excess of 750 pounds (3.36 kN) per column.

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    CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

    APPENDIX BG – SOUND TRANSMISSION

    (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.

    Adopting agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting agency BSC BSC-
    CG    		 SFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
    Adopt entire chapter
    Adopt entire chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter / Section

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    BG SOUND TRANSMISSION

    The provisions contained in this appendix are not mandatory unless specifically a dopted by a state agency or referenced in the adopting ordinance.

    See Section 1206 “Sound Transmission” of the California Building Code, Title 24, Part 2, for requirements applicable to structures in this code.

  • CRC § 6-182 Medium relevance — show source text

    Building width is in the direction of horizontal framing members supported by the header.
    c. The table provides for roof slopes between 3:12 and 12:12.
    d. The maximum roof overhang is 24 inches (610 mm).|

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    WALL CONSTRUCTION

    R610.8.1 Wood structural panel box headers. Wood structural panel box headers shall be allowed where SIP headers are not applicable. Wood structural panel box headers shall be constructed in accordance with Figure R602.7.3 and Table R602.7.3.

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    CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

    CHAPTER 7 – WALL COVERING

    (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

    Adopting agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting agency BSC BSC-
    CG    		 SFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
    Adopt entire chapter
    Adopt entire chapter as
    amended (amended
    sections listed below)    		 X
    Adopt only those sections
    that are listed below    		 X
    Chapter / Section
    R702.7
    Table R702.7 (3) †
    R702.7.2 X
    Table_R702.7.3_ X

    The state agency does not adopt sections identified with the following symbol: †

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    7 WALL COVERING

    User notes:

  • CRC § 1.1 Medium relevance — show source text

    CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

    CHAPTER 6 – WALL CONSTRUCTION

    (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

    Adopting agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting agency BSC BSC-
    CG    		 SFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
    Adopt entire chapter
    Adopt entire chapter as
    amended (amended
    sections listed below)    		 X X
    Adopt only those sections
    that are listed below
    Chapter / Section
    R602.1.1 X
    R602.3.4.1 X
    R606.1.1 X
    R608.1 X
    R610.1 X
    R610.4_Note_ X X

    The state agency does not adopt sections identified with the following symbol: †

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    6 WALL CONSTRUCTION

    User notes:

    About this chapter: Chapter 6 contains prescriptive provisions for the design and construction of walls. The wall construction covered in Chapter 6 consists of five different types: wood framed, cold-formed steel framed, masonry, concrete and structural insulated panel (SIP). The primary concern of this chapter is the structural integrity of wall construction and transfer of all imposed loads to the supporting structure.

    SECTION R601—GENERAL

    R601.1 Application. The provisions of this chapter shall control the design and construction of walls and partitions for buildings.

  • CRC § 25402.1 Medium relevance — show source text
    1. The city, county, or city and county shall obtain California Energy Commission approval for any energy- related ordinances consistent with Public Resources Code Section 25402.1(h)(2) and Title 24, Part 1, Section 10-106. Local governmental agencies may adopt and enforce energy standards for newly constructed buildings, additions, alterations and repairs, provided the California Energy Commission finds that the standards will require buildings to be designed to consume no more energy than permitted by Part 6. Such local standards include, but are not limited to, adopting the requirements of Part 6 before their effective date, requiring additional energy conservation measures, or setting more stringent energy budgets.

    101.8 Alternate materials, designs and methods of construction. The provisions of this code are not intended to prevent the use of any alternate material, appliance, installation, device, arrangement, method, design or method of construction not specifically prescribed by this code, provided that any such alternative has been approved. An alternate shall be approved on a case-by-case basis where the enforcing agency finds that the proposed alternate is satisfactory and complies with the intent of the provisions of this code and is at least the equivalent of that prescribed in this code in planning and design, energy, water, material conservation and resource efficiency, environmental air quality, performance, safety and the protection of life and health. Consideration and compliance provisions for occupancies regulated by adopting state agencies are found in the sections listed below.

    1. Section 1.2.3 in the California Building Code (CBC) for the California Building Standards Commission.
    2. Section 104.2.3 in the California Building Code (CBC) for the Division of the State Architect.
    3. Section 1.8.7 in the California Building Code (CBC); and Section 1.8.7 in the California Residential Code (CRC) for the Department of Housing and Community Development.
    4. Section 7-104 in the California Administrative Code for the Office of the Statewide Health Planning and Development.

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    ADMINISTRATION

    101.9 Effective date of this code. Only those standards approved by the California Building Standards Commission that are effective at the time an application for a building permit is submitted shall apply to the plans and specifications for, and to the construction performed under, that permit. For the effective dates of the provisions contained in this code, see the appropriate application checklist and the History Note page of this code.

    101.10 Mandatory requirements. This code contains both mandatory and voluntary green building measures. Mandatory and voluntary measures are identified in the appropriate application checklist contained in this code.

    101.11 Effective use of this code. The following steps shall be used to establish which provisions of this code are applicable to a specific occupancy:

    1. Establish the type of occupancy.
    2. Verify which state agency has authority for the established occupancy by reviewing the authorities list in Sections 103 through 106.
    3. Once the appropriate agency has been identified, find the chapter which covers the established occupancy.
    4. The Matrix Adoption Tables at the beginning of Chapters 4 and 5 identify the mandatory green building measures necessary to meet the minimum requirements of this code for the established occupancy.
    5. Voluntary tier measures are contained in Appendix Chapters A4 and A5. A checklist containing each green building measure, both required and voluntary, is provided at the end of each appendix chapter.
  • CRC § 508.5 Medium relevance — show source text

    Structures with multiple occupancies or uses shall comply with Section 508 of the California Building Code. Where a struc-_ ture is proposed for a purpose that is not specifically provided for in this code, such structure shall be classified in the group that the occupancy most nearly resembles, according to the fire safety and relative hazard involved in accordance with this code or the Cali- fornia Building Code.

    Note: Live/work units complying with the requirements of Section 508.5 of the California Building Code are classified as a Group R-2 occupancy and are permitted to be constructed as one- and two-family dwellings or townhouses in accordance with this code.

    1.1.3.1.1 Utility and Miscellaneous Group U. Buildings and structures of an accessory character and miscellaneous structures not classified in any specific occupancy shall be constructed, equipped and maintained to conform to the requirements of this code commensurate with the fire and life hazard incidental to their occupancy. Group U shall include, but not be limited to, the following:

    Agricultural buildings

    Aircraft hangars, accessory to a one- or two-family residence (see Section 412.5 of the California Building Code)

    Barns

    Carports

    Fences more than 7 feet (2134 mm) high

    Grain silos, accessory to a residential occupancy

    Greenhouses

    Livestock shelters

    Private garages

    Retaining walls

    Sheds

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    DIVISION I CALIFORNIA ADMINISTRATION

    Stables

    Tanks

    Towers

    1.1.3.2 Regulated buildings, structures and applications. The model code, state amendments to the model code and/or state amendments where there are no relevant model code provisions shall apply to detached one- and two-family dwellings, lodging houses, live/work units, townhouses and structures accessory thereto. State agencies with regulatory authority as specified in Sections 1.2 through 1.14, except where modified by local ordinance pursuant to Section 1.1.8. When adopted by a state agency, the provisions of this code shall be enforced by the appropriate enforcing agency, but only to the extent of authority granted to such agency by the state legislature.

    Note: See “How to Distinguish Between Model Code Language and California Amendments” following the Preface. 1. One- and two-family dwellings, townhouses, employee housing, factory-built housing and other types of dwellings contain- ing sleeping accommodations with common toilets or cooking facilities. See Section 1.8.2.1.1. 2. Permanent buildings and permanent accessory buildings or structures constructed within mobilehome parks and special occupancy parks regulated by the Department of Housing and Community Development. See Section 1.8.2.1.3. 3. Applications regulated by the Office of the State Fire Marshal include, but are not limited to, the following in accordance with Section 1.11:

  • CRC § 101.2.2 Medium relevance — show source text

    CFC—25: California Fire Code

    101.2.2, 101.4.2, 301.3.1, 302.2, 307.1, 308.1, 802.2.1, 802.2.3, 803.2.3, 803.4.1.1, 803.4.1.2, 803.4.1.3, 803.4.1.4, 803.4.1.5, 803.4.1.6, Table 804.5.1.1(1), 904.1.5, 1011.6.1.1, 1303.1.2, 1305.2.8.1, 1305.2.14, 1305.2.14.1, 1401.2, 1501.1, 1501.5, 1502.1, 1502.1.1, 1502.2, 1502.3, 1504.1, 1507.1, 1507.2

    CMC—25: California Mechanical Code

    302.2, 702.7, 807.1, 902.1.1, 1008.1, 1305.2.7.1, 1305.2.8, 1305.2.8.1

    CPC—25: California Plumbing Code

    302.2, 408.1, 702.7, 1009.1, 1009.2, 1009.3, 1009.5, 1302.1.6, 1503.1

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    REFERENCED STANDARDS

    CRC—25: California Residential Code

    101.2, 101.4.1, 104.3.1, 109.3.3, 109.3.10, 302.2, 307.1, 308.1, 401.3, 402.1, 405.2.6, 502.2, 502.3, 502.4, 503.2, 503.3, 503.11, 505.2, 505.3, 507.3, 701.3, 702.4, 702.5, 706.2, 708.1, 805.2, 806.4, 809.1, 906.2, 907.1, 1011.2.1, 1103.1, 1103.2, 1103.3, 1104.1, 1201.4, 1302.1.2, 1302.1.3, 1302.1.3, 1303.1.3, 1401.2, 1402.1, 1402.2, 1402.2.1, 1402.3, 1402.4, 1402.5, 1402.6

    ICC 300—2023: ICC Standard on Bleachers, Folding and Telescopic Seating and Grandstands

    301.1.1, 401.1.1, 1401.1.1

    ICC A117.1—2017: Accessible and Usable Buildings and Facilities

  • CRC § 1-23 Medium relevance — show source text

    R108.6 Work commencing before permit issuance. Any person who commences work requiring a permit on a building, structure, electrical, gas, mechanical or plumbing system before obtaining the necessary permits shall be subject to a fee established by the applicable governing authority that shall be in addition to the required permit fees.

    SECTION R109—INSPECTIONS

    R109.1 Types of inspections. For on-site construction, from time to time the building official, upon notification from the permit holder or his agent, shall make or cause to be made any necessary inspections and shall either approve that portion of the construction as completed or shall notify the permit holder or his or her agent wherein the same fails to comply with this code. The enforcing

    2025 CALIFORNIA RESIDENTIAL CODE 1-23

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    DIVISION II SCOPE AND ADMINISTRATION

    agency upon notification of the permit holder or their agent shall within a reasonable time make the inspections set forth in Sections R109.1.1, R109.1.1.1, R109.1.3, R109.1.4, R109.1.4.1, R109.1.4.2, R109.1.5, R109.1.5.1, R109.1.5.2, R109.1.5.3, R109.1.6, R109.1.6.1 and

    R109.1.6.2.

    Note: Reinforcing steel or structural framework of any part of any building or structure shall not be covered or concealed without first obtaining the approval of the enforcing agency.

    R109.1.1 Foundation inspection. Inspection of the foundation and footings shall be made after poles or piers are set or trenches or basement areas are excavated and any required forms erected and any required reinforcing steel is in place and supported prior to the placing of concrete. The foundation or footings inspection shall include excavations for thickened slabs intended for the support of bearing walls, partitions, structural supports, or equipment and special requirements for wood foundations. Mate- rials for the foundation shall be on the job site except where concrete is ready-mixed in accordance with ASTM C94. Under this circumstance, concrete is not required to be at the job site.

    R109.1.1.1 Concrete slab and under-floor inspection. Concrete slab and under-floor inspections shall be made after in-slab or under-floor reinforcing steel and building service equipment, conduits, piping or other ancillary building trade products or equip- ment are installed, but before any concrete is placed or floor sheathing is installed, including the subfloor.

    R109.1.2 Plumbing, mechanical, gas and electrical systems inspection. Rough inspection of plumbing, mechanical, gas and electrical systems shall be made prior to covering or concealment, before fixtures or appliances are set or installed, and prior to framing inspection.

    Exception: Backfilling of ground-source heat pump loop systems tested in accordance with the California Mechanical Code prior to inspection shall be permitted.

    R109.1.3 Floodplain inspections. For construction in flood hazard areas as established by Table R301.2, upon placement of the lowest floor, including basement, and prior to further vertical construction, the building official shall require submission of documentation, prepared and sealed by a registered design professional, of the elevation of the lowest floor, including basement, required in Section R306.

  • CRC § 504.9 Medium relevance — show source text

    E2707—2022: Standard Test Method for Determining Fire Penetration of Exterior Wall Assemblies Using a Direct Flame Impingement Exposure

    504.5, 504.9, 504.9.3

    E2726/E2726M—2012a(2017): Standard Test Method for Evaluating the Fire Test Response of Deck Structures to Burning Brands

    504.7.3.2, 504.7.3.3, 504.7.3.3.2

    E2768—11(2018): Standard Test Method for Extended Duration Surface Burning Characteristics of Building Materials (30 min Tunnel Test)

    503.2.4

    2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE 7-3

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    REFERENCED STANDARDS

    E2886/E2886M—20: Standard Test Method for Evaluating the Ability of Exterior Vents to Resist the Entry of Embers and Direct Flame Impingement

    504.10.1

    E2957—2017 : Standard Test Method for Resistance to Wildfire Penetration of Eaves, Soffits and Other Projections

    504.3, 504.7, 504.7.1, 504.7.2

    G155—2021: Standard Practice for Operating Xenon Arc Lamp Apparatus for Exposure of Materials

    504.9.2

    ICC International Code Council, Inc., 200 Massachusetts Avenue, NW, Suite 250, Washington, DC 20001

    CBC—2025: California Building Code

    1.1.7.3.1, 1.11.2.1.2, 1.11.3.4, 1.11.6 – 1.11.10, 101.3.1, 102.8, 105.1, 105.3, 106.3, 202, 404.10.3, 501.1, 501.3, 503.1, 503.2.2, 503.2.3, 504.2.1.2, 504.3, 504.3.1, 504.5, 504.5.2, 504.6, 504.7, 504.7.3.2, 504.8, 504.11, 504.11.1

    CEBC—2025: California Existing Building Code

    1.11.3.4, 102.8, 201.3

    CFC—2025: California Fire Code

    1.11.3.4, 1.11.9, 1.11.10, 102.8, 105.1, 201.3, 202, 402.1.1, 402.1.2, 402.2.1, 402.2.2, 403.2.4, 404.2, 404.4, 404.5, 404.10.3, 606.1, 606.2

    CRC—2025: California Residential Code

    1.1.7.3.1, 102.8

    NFPA National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471

  • CRC § 2025 Medium relevance — show source text

    It is important to understand that the IRC contains coverage for what is conventional and common in residential construction practice. While the IRC will provide all of the needed coverage for most residential construction, it might not address construction practices and systems that are atypical or rarely encountered in the industry. Therefore, the IRC contains several references to other codes either as an alternative to the provisions of the IRC or where the IRC lacks coverage for a particular type of structure, design, system, appliance or method of construction. In other words, the IRC is meant to be all inclusive for typical residential construction and it relies on other codes only where alternatives are desired or where the code lacks coverage for the uncommon aspect of residential construction. Of course, the IRC constantly evolves to address new technologies and construction practices that were once uncommon, but are now common.

    The IRC is unique in that much of it, including Chapters 3 through 9 and Chapters 34 through 43, is presented in an ordered format that is consistent with the normal progression of construction, starting with the design phase and continuing through the final trimout phase. This is consistent with the “cookbook” philosophy of the IRC.

    2025 CALIFORNIA RESIDENTIAL CODE xiii

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    xiv 2025 CALIFORNIA RESIDENTIAL CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    Arrangement and Format of the 2025 CRC

    The CRC is divided into nine main parts, specifically: Part I—Administrative, Part II—Definitions, Part III—Building Planning and Construction, Part IV—Energy Conservation, Part V—Mechanical, Part VI—Fuel Gas, Part VII—Plumbing, Part VIII—Electrical and Part IX—Referenced Standards. Parts IV through VIII of IRC are not adopted in California and replaced with references to appropriate parts of Title 24. The following provides a brief description of the content of each chapter and appendix of the CRC:

    Chapter 1 Scope and Administration.

    Chapter 1 establishes the limits of applicability of the code and describes how the code is to be applied and enforced. The provisions of Chapter 1 establish the authority and duties of the code official appointed by the authority having jurisdiction and also establish the rights and privileges of the design professional, contractor and property owner.

    Chapter 2 Definitions.

    Chapter 2 is the repository of the definitions of terms used in the body of the code. The user of the code should be familiar with and consult this chapter because the definitions are essential to the correct interpretation of the code and because the user may not be aware that a term is defined.

    Chapter 3 Building Planning.

    Chapter 3 provides guidelines for a minimum level of structural integrity, life safety, fire safety and livability for inhabitants of dwelling units regulated by this code. Chapter 3 is a compilation of the code requirements specific to the building planning sector of the design and construction process. This chapter sets forth code requirements dealing with light, ventilation, sanitation, minimum room size, ceiling height and environmental comfort. Chapter 3 establishes life-safety provisions including limitations on glazing used in hazardous areas, specifications on stairways, use of guards at elevated surfaces, window and fall protection, and rules for means of egress. Snow, wind and seismic design live and dead loads and flood-resistant construction, as well as solar energy systems are addressed in this chapter.

    Chapter 4 Foundations.

  • CRC § 1-23 Medium relevance — show source text

    R107.4 Termination of approval. The building official is authorized to terminate such permit for a temporary structure or use and to order the temporary structure or use to be discontinued.

    SECTION R108—FEES

    R108.1 Payment of fees. A permit shall not be valid until the fees prescribed by law have been paid, nor shall an amendment to a permit be released until the additional fee, if any, has been paid.

    R108.2 Schedule of permit fees. On buildings, structures, electrical, gas, mechanical and plumbing systems or alterations requiring a permit, a fee for each permit shall be paid as required, in accordance with the schedule as established by the applicable governing authority.

    R108.3 Building permit valuations. Building permit valuation shall include total value of the work for which a permit is being issued, such as electrical, gas, mechanical, plumbing equipment and other permanent systems, including materials and labor.

    R108.4 Related fees. The payment of the fee for the construction, alteration, removal or demolition for work done in connection to or concurrently with the work authorized by a building permit shall not relieve the applicant or holder of the permit from the payment of other fees that are prescribed by law.

    R108.5 Refunds. The building official is authorized to establish a refund policy.

    R108.6 Work commencing before permit issuance. Any person who commences work requiring a permit on a building, structure, electrical, gas, mechanical or plumbing system before obtaining the necessary permits shall be subject to a fee established by the applicable governing authority that shall be in addition to the required permit fees.

    SECTION R109—INSPECTIONS

    R109.1 Types of inspections. For on-site construction, from time to time the building official, upon notification from the permit holder or his agent, shall make or cause to be made any necessary inspections and shall either approve that portion of the construction as completed or shall notify the permit holder or his or her agent wherein the same fails to comply with this code. The enforcing

    2025 CALIFORNIA RESIDENTIAL CODE 1-23

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    DIVISION II SCOPE AND ADMINISTRATION

    agency upon notification of the permit holder or their agent shall within a reasonable time make the inspections set forth in Sections R109.1.1, R109.1.1.1, R109.1.3, R109.1.4, R109.1.4.1, R109.1.4.2, R109.1.5, R109.1.5.1, R109.1.5.2, R109.1.5.3, R109.1.6, R109.1.6.1 and

    R109.1.6.2.

    Note: Reinforcing steel or structural framework of any part of any building or structure shall not be covered or concealed without first obtaining the approval of the enforcing agency.

  • CRC § 2311.3.1 Medium relevance — show source text

    2, 2311.3.1, 2311.4.3, 2311.8.2, 2311.8.8, 2311.8.10, 2404.9, 2404.9.2, 2504.5, 2703.2.2, 2703.10.4, 2703.14, 2803.2, 2803.3, 3001.1, 3003.1, 3004.2, 3108.12.1, 3108.12.2, 3703.5, 3804.1.1.7, 3904.1, 3905.3, Table 5003.1.1(1), 5003.8.4.2, 5003.8.5.2, 5003.8.6.2, 5004.3.1, 5303.7.6, 5303.16.9, 5305.5, 5306.2.2, 5306.2.3, 5307.4.4, 5504.2.1.3, 5504.2.2.3, 5505.4.1.1, 5701.3, 5703.6.1, 5704.2.8.9, 5705.3.7.5.1, 5706.2, 5706.4.4, 6003.1.3, 6003.2.3.2, 6004.2.2.7, 6005.3.1, 6005.3.2, 6103.2.1.7

    CPC—25: California Plumbing Code

    201.3, 903.3.5, 904.11.1.3, 912.6, 2311.2.3, 5004.2.2.6

    CRC—25: California Residential Code

    102.5, 202, 913.1, 1001.1, 1205.1, 1205.2.1

    ICC 300—2017: Standard on Bleachers, Folding and Telescopic Seating and Grandstands

    1030.1.1, 1030.17

    ICC ES AC 331: Acceptance Criteria for Smoke and Heat Vents

    910.3.1

    ICC 500—2020: ICC/NSSA Standard on the Design and Construction of Storm Shelters

    1031.2

    ICC A117.1—2017: Accessible and Usable Buildings and Facilities

    907.5.2.3.3, 1009.2.2, 1009.8.2, 1009.9, 1009.11, 1010.2.12.1, 1012.1, 1012.6.5, 1012.10, 1013.4, 1023.11

    IFGC—24: International Fuel Gas Code®

Frequently asked questions

Who decides whether a referenced standard in the CRC is mandatory for my project?

The state agency that has statutory authority for your occupancy decides by adoption. Use the Matrix Adoption Table to see whether that agency adopted the CRC chapter/section or appendix that cites the standard; only adopted sections make the referenced standard mandatory.

If a referenced standard appears in Part IX, does it automatically apply?

No. Part IX lists referenced standards; those standards apply only to CRC sections that are actually adopted for your project. Confirm adoption via the matrix and the agency’s adoption text.

Are appendices mandatory?

No — many appendices state they are “not mandatory unless specifically adopted by a state agency or referenced in the adopting ordinance.” Check the matrix to see if your agency adopted the appendix.

The matrix shows “adopt as amended” — what now?

If an agency adopted a chapter “as amended,” you must read that agency’s amendments (the code will list which sections are state‑amended). The amended text controls for that agency’s regulated work.

Where do the inspection obligations (like § R109.1.5 / § R109.1.6) fit?

§ R109.1 lists the inspection subsections the enforcing agency must make; these are administrative obligations. The specific language of § R109.1.5 and § R109.1.6 was not included in the retrieved files, but the R109.1 list itself is in the code.

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California Residential Code