CRC · California Residential Code

What California state agencies and special administration provisions affect CRC enforcement?

The CRC’s Chapter 1 Matrix shows which state agencies (HCD, SFM, BSC, etc.) adopted or amended particular chapters/sections; enforcement is local unless Chapter 1 or the Matrix + agency statutory text (e.g., **§ 1.8.2.1.1**, **§ 1.11**) assigns responsibility to a state agency — always confirm the agency’s Chapter 1 statutory language rather than relying on the Matrix alone.

Last reviewed: July 6, 2026

What the code requires — 2–4 sentences

The California Residential Code delegates adoption and enforcement of specific chapters/sections to named state agencies and to local enforcing agencies; which agency applies to a given topic is identified in the Matrix Adoption Tables (Chapter 1). Use the agency-specific adoption blocks and the Matrix entries to determine whether a provision was adopted/amended by a state agency (and therefore may be enforced by that agency) or left to local enforcement. See § 1.8.2.1.1, § 1.11, and the Chapter 1 Matrix Adoption Tables for the controlling allocations and agency acronyms.

The Matrix Adoption Tables in Chapter 1 show “who adopted what”; when a state agency has adopted or amended a section the agency’s statutory scope in Chapter 1 determines whether the state or the local jurisdiction enforces that section.

Requirements in detail

Which agencies matter (overview)

  • Department of Housing and Community Development (HCD) — referenced as HCD 1 for certain residential/state housing adoptions; see § 1.8.2.1.1 for HCD adoption/identification.
  • Office of the State Fire Marshal (SFM) — adoption and enforcement of fire‑related sections and chapters; SFM materials and scope are documented under § 1.11 and shown in the Matrix.
  • Other state adopting agencies that commonly appear in the CRC Matrix: BSC (Building Standards Commission), DSA, OSHPD, DPH, AGR, BSCC, CA (Dept. of Consumer Affairs) and others — each agency’s scope and acronym are explained in Chapter 1 and in the Matrix.

How enforcement is allocated

  • The general rule: local building departments enforce the CRC except where a statute or agency adoption assigns authority to a state agency. See Section on local enforcing agency duties.
  • Where the Matrix or the agency section says a state agency “adopted” particular sections (often shown with an “X” in the Matrix), that adoption indicates the agency has authority to promulgate standards for those occupancies and may be the enforcing agency as provided by law. The Matrix is explicitly described as a non‑regulatory aid to show which state agencies adopted or amended which code sections.

How to read the Matrix Adoption Table (decision dimensions)

  • The Matrix rows and columns show (a) whether an agency adopted an entire chapter, adopted the chapter with amendments, or adopted only listed sections, and (b) an “X” where an agency adoption applies. The Matrix is intended as a user aid, not a regulation; statutory authority in Chapter 1 determines enforcement.
Decision dimension Values you will see in the Matrix Code Reference
Adoption scope Adopt entire chapter, Adopt entire chapter as amended, Adopt only listed sections Matrix Adoption Table (Chapter 1)
Agency indicator X (agency adopted/amended), blank (no adoption) Example Matrix rows and sample entries (Chapter 1)
Agency acronym HCD, SFM, BSC, DSA, OSHPD, DPH, etc. — see legend in Chapter 1 Legend and agency list (Chapter 1)
Enforcement outcome Local enforcing agency (default) OR State agency when statute/Matrix + Chapter 1 authority assigns enforcement Local enforcing agency duties; agency scope sections (§ 1.8.3.1, § 1.8.2.1.1, § 1.11)

Specific controlling sections called out by the user

  • § 1.8.2.1.1 — identifies the HCD adoption acronym HCD 1 and ties HCD adoptions for housing/state housing topics to the Matrix entries (see the HCD legend and agency IDs). Use this to identify where HCD has adopted or amended CRC material.
  • § 1.11 — identifies the Office of the State Fire Marshal (SFM) adoption scope and notes SFM adoptions will be identified in the Matrix under SFM; many fire‑related chapters/sections show SFM adoption entries.
  • Matrix Adoption Table (Chapter 1) — the Matrix format, legend, and examples are found in Chapter 1 and show which agency adopted which chapters or sections (the Matrix is explicitly non‑regulatory and an aid). Always confirm statutory enforcement authority in the Chapter 1 agency sections.

Exceptions & special cases

  • Mobilehome parks / special occupancy parks / employee housing / factory‑built housing — the CRC directs users to the Health & Safety Code and Title 25 regulations for those programs and specifically notes exceptions where HCD is the enforcing agency. See the CRC referral in § 1.8.3.2.* (mobilehome parks, special occupancy parks, Employee Housing Act, Factory‑Built Housing Law) and the stated exceptions for HCD enforcing certain parks or factory‑built housing.
  • State buildings — the term state building and the special enforcement appointment authority for state agencies (e.g., DSA, CSU/UC authorities) are described elsewhere in Chapter 1; where a building is a “state building” a state agency may appoint a building official to enforce the code for that building. See the state building identification language and the Matrix adoption identifier BSC for some state building adoptions.
  • Matrix non‑regulatory note — the Matrix is not itself regulation. If the Matrix shows an agency adoption, confirm the statutory authority text in the agency’s Chapter 1 section because statutory law—not the Matrix — controls enforcement assignment.

Common mistakes

  • Treating the Matrix as the final legal authority. The Matrix is a user aid; enforcement authority is determined by the statutory language in Chapter 1 and the referenced state laws. Always check the agency section in Chapter 1.
  • Assuming local enforcement by default without checking agency adoption rows for the specific chapter/section (e.g., SFM or HCD may have adopted/amended and have enforcement authority for that topic). Check the Matrix and the applicable agency section.
  • Missing the “exceptions” rows in § 1.8.3.2 (mobilehome parks, special occupancy parks, employee housing, factory‑built housing) — those have separate statutory enforcement frameworks and may be enforced by HCD or other state agencies.

Worked example — concrete scenario applying the rule with numbers

Scenario: You’re the plan reviewer in County X and receive plans for a 12‑unit multifamily housing project. You need to know whether the Department of Housing and Community Development (HCD) or your local building department enforces certain CRC chapters or sections.

Step 1 — Check the Matrix Adoption Table for the chapters in the submittal (for example, Chapters 3–10). If the Matrix row for Chapter 5 shows an X under HCD 1, that means HCD has adopted or amended Chapter 5 entries; see the Matrix legend and legend of agency acronyms in Chapter 1. (Matrix example formats and agency legend are in Chapter 1.)

Step 2 — Confirm statutory enforcement in Chapter 1: lookup § 1.8.2.1.1 (HCD 1 identification) and the HCD agency text to confirm whether HCD’s adoption carries enforcement authority for this occupancy. If § 1.8.2.1.1/agency text shows HCD as the adopting agency for that scope, then HCD—not the county—may be the enforcing agency for those HCD‑adopted sections.

Step 3 — If the Matrix shows SFM adopted “1.11.0 through 1.11.11” (Matrix sample shows SFM entries for those sections), then for the fire‑related sections in that range (11 sections total: 1.11.0 to 1.11.11), consult § 1.11 to determine SFM’s enforcement scope; the Matrix entry of X plus § 1.11 text signals SFM adoption. Example: the mechanical code Matrix shows X for 1.11.0 through 1.11.11. That indicates 11 sections with SFM adoption entries you must check.

Numeric summary for this review:

  • Chapters checked: 3 (Ch. 3, 5, 7)
  • Matrix hits found: 2 agency X’s (HCD 1 for Ch. 5; SFM for 1.11.0–1.11.11) — confirm statutory language in § 1.8.2.1.1 and § 1.11 before assigning final enforcement.

Related provisions

  • § 1.8.3.1 — Local enforcing agency duties and powers (local enforcement default).
  • § 1.8.3.2.1 — State Housing Law referral and HCD‑related enforcement references (mobilehome / housing law links).
  • § 1.8.3.2.2 — Mobilehome Parks Act referral (exceptions where HCD enforces).
  • § 1.8.4.1 — Permit requirement statement for work under enforcing agency.
  • § 1.11.0 through § 1.11.11 — Office of the State Fire Marshal adoption identification and authority references (see § 1.11).
  • Matrix Adoption Table (Chapter 1) — descriptive and format guidance for reading agency adoptions (Chapter 1 Matrix examples and legend).

Code references

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

  • CRC § 1.5 Medium relevance — show source text

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

    DIVISION I CALIFORNIA ADMINISTRATION

    3. Existing State-Owned Buildings, including those owned by the University of California and by the Cali- fornia State UniversityBuilding seismic retrofit stan- dards including abating falling hazards of structural and nonstructural components and strengthening of building structures. See also Division of the State Architect.

    Enforcing AgencyState or local agency specified by the applicable provisions of law.

    Authority CitedGovernment Code Section 16600.

    ReferencesGovernment Code Sections 16600 through 16604.

    4. Unreinforced Masonry Bearing Wall Buildings.

    ApplicationMinimum seismic strengthening standards for buildings specified in the California Existing Build- ing Code, except for buildings subject to building stan- dards adopted pursuant to Part 1.5 (commencing with Section 17910).

    Enforcing AgencyState or local agency specified by the applicable provisions of law.

    Authority CitedHealth and Safety Code Section 18934.7.

    ReferenceHealth and Safety Code Division 13, Part 2.5 commencing with Sections 18901.

    1.2.1.1 State Building. For purposes of this code, a “state building” is a structure for which a state agency or state entity has authority to construct, alter, enlarge, replace, repair or demolish.

    1.2.1.2 Enforcement. [CSU, UC, Judicial Council and California Department of Corrections and Rehabilita- tion] state agencies or state entities authorized to con- struct state buildings may appoint a building official who is responsible to the agency for enforcement of the pro- visions of the California Building Standards Code.

    Exception: State buildings regulated by other sections of this code remain the enforcement responsibility of the designated entities.

    1.2.1.3 Enforcement, Reserved for DGS.

    1.2.1.4 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this sec- tion will be identified in the Matrix Adoption Tables under the acronym BSC.

    1.2.2 BSC-CG. Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

    1. Green Building Standards for Nonresidential Occu- pancies.

    ApplicationAll occupancies where no other state agency has the authority to adopt green building stan- dards applicable to those occupancies.

    Enforcing AgencyState or local agency specified by the applicable provisions of law.

    Authority CitedHealth and Safety Code Sections 18930.5, 18938 and 18940.5.

    ReferenceHealth and Safety Code, Division 13, Part 2.5, commencing with Section 18901.

    2. Graywater Systems for Nonresidential Occupancies.

  • CRC § 1.8.3 Medium relevance — show source text

    SECTION 1.8.3—LOCAL ENFORCING AGENCY

    1.8.3.1 Duties and powers. The building department of every city, county, or city and county shall enforce all the provisions of law, this code, and the other rules and regulations promulgated by the Department of Housing and Community Development pertaining to the installation, erection, construction, reconstruction, movement, enlargement, conversion, alteration, repair, removal, demolition or

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    DIVISION I CALIFORNIA ADMINISTRATION

    arrangement of apartments, condominiums, hotels, motels, lodging houses and dwellings, including accessory buildings, facilities and uses thereto.

    The provisions regulating the erection and construction of dwellings and appurtenant structures shall not apply to existing structures as to which construction is commenced or approved prior to the effective date of these regulations. Requirements relating to use, main- tenance and occupancy shall apply to all dwellings and appurtenant structures approved for construction or constructed before or after the effective date of this code.

    For additional information regarding the use and occupancy of existing buildings and appurtenant structures, see California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1, commencing with Article 1, Section 1.

    For additional requirements regarding additions, alterations or repairs to existing buildings and appurtenant structures, see the Cali- fornia Existing Building Code.

    1.8.3.2 Laws, rules and regulations. Other than the building standards contained in this code, and notwithstanding other provisions of law, the statutory authority and location of the laws, rules and regulations to be enforced by local enforcing agencies are listed by stat- ute in Sections 1.8.3.2.1 through 1.8.3.2.5 below:

    1.8.3.2.1 State Housing Law. Refer to the State Housing Law, California Health and Safety Code, Division 13, Part 1.5, commencing with Section 17910 and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1, commencing with Section 1, for the erec- tion, construction, reconstruction, movement, enlargement, conversion, alteration, repair, removal, demolition or arrangement of apartments, condominiums, hotels, motels, lodging houses and dwellings, including accessory buildings, facilities and uses thereto.

    1.8.3.2.2 Mobilehome Parks Act. Refer to the Mobilehome Parks Act, California Health and Safety Code, Division 13, Part 2.1, commencing with Section 18200 and California Code of Regulations, Title 25, Division 1, Chapter 2, commencing with Section 1000 for mobilehome park administrative and enforcement authority, permits, plans, fees, violations, inspections and penalties both within and outside mobilehome parks.

    Exception: Mobilehome parks where the Department of Housing and Community Development is the enforcing agency.

  • CRC § 1.3.0 Medium relevance — show source text

    In the_ absence of recognized and accepted test methods, the building official shall approve the testing procedures. Tests shall be performed by an approved agency. Reports of such tests shall be retained by the building official for the period required for retention of public records.

    1.3.0 Board of State and Community Corrections.

    1.3.1 Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

    ApplicationLocal detention facilities.

    Enforcing AgencyBoard of State and Community Cor- rections.

    Authority CitedPenal Code Section 6030; Welfare and Institutions Code Sections 210 and 885.

    ReferencesPenal Code Section 6030; Welfare and Institutions Code Sections 210 and 885.

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    1.3.2 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this section will be identified in the Matrix Adoption Tables under the acronym BSCC.

    1.4.0 Department of Consumer Affairs.

    1.4.1 Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

    Board of Barbering and Cosmetology.

    ApplicationAny establishment or mobile unit where barbering, cosmetology, or electrolysis is being per- formed.

    Enforcing AgencyState or local agency specified by applicable provisions of law.

    Authority CitedBusiness and Professions Code Sec- tion 7312.

    ReferencesBusiness and Professions Code Sections 7303, 7303.1, 7312, and 7313.

    1.4.2 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this section will be identified in the Matrix Adoption Tables under the acronym CA.

    1.5.0 Reserved for California Energy Commission.

    1.6.0 Department of Food and Agriculture.

    1.6.1 Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

    ApplicationDairies and places of meat and poultry

    inspection.

    Enforcing AgencyDepartment of Food and Agricul-

    ture.

    Authority CitedFood and Agricultural Code Sections

    18735, 18960, 19384, 33481, and 33731.

    ReferencesFood and Agricultural Code Sections 18735, 18960, 19384, 33481, and 33731.

  • CRC § 2.3 Medium relevance — show source text

    **_ Refer to the Special Occupancy Parks Act, California Health and Safety Code, Division 13, Part 2.3, commencing with Section 18860 and California Code of Regulations, Title 25, Division 1, Chapter 2.2, commencing with Section 2000 for special occupancy park administra- tive and enforcement authority, permits, fees, viola- tions, inspections, and penalties both within and outside of special occupancy parks. Exception: Special occupancy parks where the Department of Housing and Community Develop- ment is the enforcing agency. 1.8.3.2.4 Employee Housing Act. Refer to the Employee Housing Act, California Health and Safety Code, Division 13, Part 1, commencing with Section 17000 and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 3, commencing with Section 600 for employee housing administrative and enforcement authority, permits, fees, violations, inspections, and penalties. 1.8.3.2.5 Factory-Built Housing Law. Refer to the Factory-Built Housing Law, California Health and Safety Code, Division 13, Part 6, commencing with Section 19960 and California Code of Regulations, Title 25, Division 1, Chapter 3, Subchapter 1, commencing with Section 3000 for factory-built housing administrative and enforcement authority, permits, fees, violations, inspections, and penalties. 1.8.4 Permits, Fees, Applications, and Inspections. 1.8.4.1 Permits. A written construction permit shall be obtained from the enforcing agency prior to the erection, construction, reconstruction, installation, relocation, or alteration of any mechanical system. Exceptions: (1) Work exempt from permits as specified in Chapter 1, Scope and Administration, Division II, Section 104.2 Items (1) through (5) of this code. (2) Changes, alterations, or repairs of a minor nature not affecting structural features, egress, sanitation, safety, or accessibility as determined by the enforcing agency.

    (3) Retroactive permits issued in accordance with Health and Safety Code Section 17958.12.

    Exemptions from permit requirements shall not be deemed to grant authorization for any work to be done in any manner in violation of other provisions of law or this code. 1.8.4.2 Fees. Subject to other provisions of law, the governing body of any city, county, or city and county may prescribe fees to defray the cost of enforcement of rules and regulations promulgated by the Department of Housing and Community Development. The amount of the fees shall not exceed the amount reasonably neces- sary to administer or process permits, certificates, forms, or other documents, or to defray the costs of enforcement. For additional information, see State Housing Law, Health and Safety Code, Division 13, Part 1.5, Section 17951 and California Code of Regulations, Title 25, Divi- sion 1, Chapter 1, Subchapter 1, Article 3, commencing with Section 6.

    _**1.8.4.3 Plan Review and Time Limitations.

  • CRC § 1.1.11 Medium relevance — show source text

    tained in the office of the building official responsible for the administration and enforcement of this code. Each state department concerned and each city, county, or city and county shall have an up-to-date copy of the code available for public inspection. See Health and Safety Code Section 18942 (e)(1) and (2).

    1.1.11 Format. This part fundamentally adopts the Uniform Plumbing Code by reference on a chapter-by-chapter basis. When a specific chapter of the Uniform Plumbing Code is not printed in the code and is marked “Reserved”, such chapter of the Uniform Plumbing Code is not adopted as a portion of this code. When a specific chapter of the Uniform Plumbing Code is marked “Not Adopted by the State of California” but appears in the code, it may be available for adoption by local ordinance.

    Note: Matrix Adoption Tables at the front of each chapter may aid the code user in determining which chapter or sec- tions within a chapter are applicable to buildings under the authority of a specific state agency, but they are not to be con- sidered regulatory.

    1.1.12 Validity. If any chapter, section, subsection, sentence, clause or phrase of this code is for any reason held to be unconstitutional, contrary to statute, exceeding the authority of the state as stipulated by statutes or otherwise inoperative, such decision shall not affect the validity of the remaining portion of this code.

    1.2.0 Building Standards Commission.

    1.2.1 BSC. Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

    1. State Buildings for All Occupancies.

    Application – State buildings (all occupancies), includ- ing buildings constructed by the Trustees of the Califor- nia State University (CSU) and the Regents of the University of California (UC) where no state agency has the authority to adopt building standards applicable to such buildings.

    Enforcing Agency – State or local agency specified by the applicable provisions of law.

    Authority CitedHealth and Safety Code Section 18934.5.

    ReferenceHealth and Safety Code, Division 13, Part 2.5, commencing with Section 18901.

    2. University of California, California State Universities, and California Community Colleges.

    ApplicationStandards for lighting for parking lots and primary campus walkways at the University of Califor- nia, California State Universities, and California Com- munity Colleges.

    Enforcing AgencyState or local agency specified by the applicable provisions of law.

    Authority CitedGovernment Code Section 14617.

    ReferenceGovernment Code Section 14617.

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  • CRC § 18934.7. Medium relevance — show source text

    ADMINISTRATION

    2. University of California, California State Universities and California Community Colleges.

    Application— Standards for lighting for parking lots and primary campus walkways at the University of California, California State Universities and California Community Colleges.

    Enforcing agency— State or local agency specified by the applicable provisions of law.

    Authority cited— Government Code Section 14617.

    Reference— Government Code Section 14617.

    3. Existing state-owned buildings, including those owned by the University of California and by the California State University.

    Application— Building seismic retrofit standards including abating falling hazards of structural and nonstructural components and strengthening of building structures. See also Division of the State Architect.

    Enforcing agency— State or local agency specified by the applicable provisions of law.

    Authority cited— Health and Safety Code Section 16600.

    Reference— Health and Safety Code Sections 16600 through 16604. 4. Unreinforced masonry-bearing wall buildings.

    Application— Minimum seismic strengthening standards for buildings specified in Appendix Chapter A1 of the California Existing Building Code, except for buildings subject to building standards pursuant to Health and Safety Code (commencing) with Section 17910.

    Enforcing agency— State or local agency specified the applicable provisions of law.

    Authority cited— Health and Safety Code Section 18934.7.

    Reference— Health and Safety Code, Division 13, Part 2.5, commencing with Section 18901.

    1.2.1.1 State building. For purposes of this code, a “state building” is a structure for which a state agency or state entity has authority to construct, alter, enlarge, replace, repair or demolish.

    1.2.1.2 Enforcement. [CSU, UC, Judicial Council and California Department of Corrections and Rehabilitation] State agencies or state entities authorized to construct state buildings may appoint a building official who is responsible to the agency for enforcement of the provisions of the California Building Standards Code.

    Exception: State buildings regulated by other sections of this code remain the enforcement responsibility of the designated entities.

    1.2.1.3 Enforcement. Reserved for DGS.

    1.2.1.4 Adopting agency identification. The provisions of this code applicable to buildings identified in this section will be identified in the Matrix Adoption Tables under the acronym BSC .

    1.2.2 BSC-CG. Specific scope of application of the agency responsible for enforcement, the enforcement agency and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated. 1. Green building standards for nonresidential occupancies.

    Application— All occupancies where no state agency has the authority to adopt green building standards applicable to those occupancies.

    Enforcing agency— State or local agency specified by the applicable provisions of law.

    Authority cited— Health and Safety Code Sections 18930.5(a), 18938 and 18940.5.

  • CRC § 1.8.3.2 Medium relevance — show source text

    For additional information regarding the use and occupancy of existing buildings and appurtenant struc- tures, see California Code of Regulations, Title 25, Divi- sion 1, Chapter 1, Subchapter 1, commencing with Section 1.

    1.8.3.2 Laws, Rules, and Regulations. Other than the building standards contained in this code, and notwith- standing other provisions of law, the statutory authority and location of the laws, rules, and regulations to be enforced by local enforcing agencies are listed by statute in Sections 1.8.3.2.1 through 1.8.3.2.5 below:

    1.8.3.2.1 State Housing Law. Refer to the State Housing Law, California Health and Safety Code, Division 13, Part 1.5, commencing with Section 17910, and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1, commencing with Section 1, for the erection, construction, recon- struction, movement, enlargement, conversion, alteration, repair, removal, demolition, or arrange- ment of apartments, condominiums, hotels, motels, lodging houses, and dwellings, including accessory buildings, facilities, and uses thereto.

    1.8.3.2.2 Mobilehome Parks Act. Refer to the Mobilehome Parks Act, California Health and Safety Code, Division 13, Part 2.1, commencing with Section 18200 and California Code of Regula- tions, Title 25, Division 1, Chapter 2, commencing with Section 1000 for mobilehome park administra- tive and enforcement authority, permits, plans, fees, violations, inspections, and penalties both within and outside mobilehome parks.

    Exception: Mobilehome parks where the Depart- ment of Housing and Community Development is the enforcing agency.

    1.8.3.2.3 Special Occupancy Parks Act. Refer to the Special Occupancy Parks Act, California Health and Safety Code, Division 13, Part 2.3, commencing with Section 18860 and California Code of Regulations, Title 25, Division 1, Chapter 2.2, commencing with Section 2000 for special occupancy park adminis- trative and enforcement authority, permits, fees, vio- lations, inspections, and penalties both within and outside of special occupancy parks.

    Exception: Special occupancy parks where the Department of Housing and Community Develop- ment is the enforcing agency.

    1.8.3.2.4 Employee Housing Act. Refer to the Employee Housing Act, California Health and Safety Code, Division 13, Part 1, commencing with Section 17000 and California Code of Regulations,

    Title 25, Division 1, Chapter 1, Subchapter 3, com- mencing with Section 600 for employee housing administrative and enforcement authority, permits, fees, violations, inspections, and penalties.

  • CRC § 1.8.3.2.3 Medium relevance — show source text

    Exception: Mobilehome parks where the Department of Housing and Community Development is the enforcing agency.

    1.8.3.2.3 Special Occupancy Parks Act. Refer to the Special Occupancy Parks Act, California Health and Safety Code, Division 13, Part 2.3, commencing with Section 18860 and California Code of Regulations, Title 25, Division 1, Chapter 2.2, commencing with Section 2000 for special occupancy park administrative and enforcement authority, permits, fees, violations, inspections and penal- ties both within and outside of special occupancy parks.

    Exception: Special occupancy parks where the Department of Housing and Community Development is the enforcing agency.

    1.8.3.2.4 Employee Housing Act. Refer to the Employee Housing Act, California Health and Safety Code, Division 13, Part 1, commencing with Section 17000 and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 3, commencing with Section 600 for employee housing administrative and enforcement authority, permits, fees, violations, inspections and penalties.

    1.8.3.2.5 Factory-Built Housing Law. Refer to the Factory-Built Housing Law, California Health and Safety Code, Division 13, Part 6, commencing with Section 19960 and California Code of Regulations, Title 25, Division 1, Chapter 3, Subchapter 1, commencing with Section 3000 for factory-built housing administrative and enforcement authority, permits, fees, violations, inspections and penalties.

    SECTION 1.8.4—PERMITS, FEES, APPLICATIONS AND INSPECTIONS

    1.8.4.1 Permits. A written construction permit shall be obtained from the enforcing agency prior to the erection, construction, recon- struction, installation, moving or alteration of any building or structure.

    Exceptions: 1. Work exempt from permits as specified in Chapter 1, Scope and Application, Division II, Administration, Section R105.2. 2. Changes, alterations or repairs of a minor nature not affecting structural features, egress, sanitation, safety or accessibility as determined by the enforcing agency. 3. Retroactive permits issued in accordance with Health and Safety Code Section 17958.12.

    Exemptions from permit requirements shall not be deemed to grant authorization for any work to be done in any manner in violation of other provisions of law or this code.

    1.8.4.2 Fees. Subject to other provisions of law, the governing body of any city, county, or city and county may prescribe fees to defray the cost of enforcement of rules and regulations promulgated by the Department of Housing and Community Development. The amount of the fees shall not exceed the amount reasonably necessary to administer or process permits, certificates, forms or other documents, or to defray the costs of enforcement. For additional information, see State Housing Law, Health and Safety Code, Division 13, Part 1.5, Section 17951 and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1, Article 3, commencing with Section 6.

  • CRC § 1.3.0 Medium relevance — show source text

    Test_ methods shall be as specified in this code or by other recog- nized test standards. In the absence of recognized and accepted test methods, the building official shall approve the testing procedures. Tests shall be performed by an approved agency. Reports of such tests shall be retained by the building official for the period required for retention of public records.

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    1.3.0 Reserved for Board of State and Community Correc- tions.

    1.4.0 Department of Consumer Affairs.

    1.4.1 Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

    Board of Pharmacy.

    Application – Pharmacies.

    Enforcing Agency – State or local agency specified by applicable provisions of law.

    Authority Cited – Business and Professions Code Section 4005.

    References – Business and Professions Code Sections 4005, 4127.7, and 4201.

    1.4.2 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this section will be identified in the Matrix Adoption Tables under the acronym CA.

    1.5.0 Reserved for California Energy Commission.

    1.6.0 Reserved for Department of Food and Agriculture.

    1.7.0 California Department of Public Health.

    1.7.1 Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

    Department of Public Health.

    Application – Food establishments.

    Enforcing Agency – Department of Health Services and the local health agency.

    Authority Cited – Health and Safety Code Sections 110065, 113710, and 131200.

    References – Health and Safety Code Sections 110065, 113705, 114140, and 131200.

    1.7.2 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this section will be identified in the Matrix Adoption Tables under the acronym DPH.

    1.8.0 Department of Housing and Community Development.

    [HCD]

    1.8.1 Purpose. The purpose of this code is to establish the minimum requirements necessary to protect the health, safety, and general welfare of the occupants and the public by governing the erection, construction, reconstruction, enlarge- ment, conversion, alteration, repair, moving, removal, demo- lition, ventilation, and maintenance or use of heating, ventilating, cooling, refrigeration systems, incinerators, and other miscellaneous heat-producing appliances.

    1.8.2 Authority and Abbreviations.

  • CRC § 323-9843 Medium relevance — show source text

    State Librarian [SL]

    library.ca.gov csllaw@library.ca.gov (916) 323-9843 Public Library Construction & Renovation

    Structural Pest Control Board [CA] pestboard.ca.gov pestboard@dca.ca.gov (800) 737-8188 Structural Pest Control Locations

    Veterinary Medical Board [CA] vmb.ca.gov vmb@dca.ca.gov (916) 515-5220 Veterinary Facilities

    Department of Food and Agriculture [AGR] cdfa.ca.gov (916) 900-5004 Rendering & Collection Centers (916) 900-5064 Meat & Poultry Packing Plants (916) 900-5008 Milk & Dairy Food Safety

    Department of Health Care Access and Information

    Office of Statewide Hospital Planning and Development

    [OSHPD 1, 1R, 2, 3, 4, 5, 6] hcai.ca.gov regsunit@hcai.ca.gov (916) 440-8300 Hospital Standards, Skilled Nursing Facility Standards & Clinic Standards

    Department of Public Health [DPH]

    cdph.ca.gov (Recreational Health) (916) 449-5661 Food Establishments, Organized Camps, Public Swimming Pools

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    How to Distinguish Between Model Code Language and California Amendments

    To distinguish between model code language and the incorporated California amendments, including exclusive California stan- dards, California amendments will appear in italics.

    [BSC] This is an example of a state agency acronym used to identify an adoption or amendment by the agency. The acronyms will appear at California Amendments and in the Matrix Adoption Tables. Sections 1.2 through 1.14 in Chapter 1, Division 1 of the Cali- fornia Building Code, explain the used acronyms, the application of state agency adoptions to building occupancies or building features, the enforcement agency as designated by state law (may be the state adopting agency or local building or fire official), the authority in state law for the state agency to make the adoption, and the specific state law being implemented by the agency’s adoption. The following acronyms are used in Title 24 to identify the state adopting agency making an adoption.

    Legend of Acronyms of Adopting State Agencies

    BSC California Building Standards Commission (see Section 1.2)

    BSC-CG California Building Standards Commission-CALGreen (see Section 1.2.2)

    BSCC Board of State and Community Corrections (see Section 1.3)

    SFM Office of the State Fire Marshal (see Section 1.11)

    HCD 1 Department of Housing and Community Development (see Section 1.8.2.1.1)

    HCD 2 Department of Housing and Community Development (see Section 1.8.2.1.3)

    HCD 1/AC Department of Housing and Community Development (see Section 1.8.2.1.2)

    DSA-AC Division of the State Architect-Access Compliance (see Section 1.9.1)

    DSA-SS Division of the State Architect-Structural Safety (see Section 1.9.2)

  • 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.

    vi 2025 CALIFORNIA RESIDENTIAL CODE

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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 § 9.2.2 Medium relevance — show source text

    Entire Chapter||||||||||||||||||||||||| |Adopt Entire Chapter as
    amended (amended sections
    listed below)||||||||||||||||||||||||| |Adopt only those sections
    that are listed below|X|X|X|X|X|X|X|X|X|X|X|X|X|X|X|X|X|X|X|X|X|X|X|X| |Chapter/Section||||||||||||||||||||||||| |1.9.2.2 & 1.9.2.2.1|||||||||X|||||||||||||||| |1.10.1 and subsections||||||||||X|X|||||||||||||| |1.10.2 and subsections||||||||||||X||||||||||||| |1.10.3 and subsections|||||||||||||X|||||||||||| |1.10.4 and subsections||||||||||||||X||||||||||| |1.10.5 and subsections|||||||||||||||X|||||||||| |1.10.6 and subsections||||||||||||||||X||||||||| |1.11.0 through 1.11.11|||X|||||||||||||||||||||| |1.12.0|||||||||||||||||||||||X|| |1.13.0||||||||||||||||||||X||||| |1.14.0||||||||||||||||||||||||X| |Division II –
    Scope and Administration||||||||||||||||||||||||| |101.0 – 104.1||||||||||X|X|X|X|X|X|||||||||| |104.2 (Items 1 – 5)||||X|X|||||||||||||||||||| |104.3 – 107.0||||||||||X|X|X|X|X|X|||||||||| |104.4.3.1|X||||||||||||||||||||||||

    This 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 1.11.0.

    2 2025 CALIFORNIA MECHANICAL CODE

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

    CHAPTER 1

    ADMINISTRATION

    DIVISION I CALIFORNIA ADMINISTRATION

    1.1.0 General.

Frequently asked questions

Who enforces CRC provisions by default — the city/county or a state agency?

By default the local building department enforces CRC provisions. If a state agency has statutorily adopted/amended a chapter or section (shown in the Chapter 1 Matrix and described in the agency’s Chapter 1 section), the statute/agency text controls enforcement assignment.

How do I tell from the Matrix whether a state agency adopted a section?

Look for an X (or the matrix notation) under the agency’s column for the chapter/section. Then confirm the agency’s statutory scope in Chapter 1 (the agency section such as § 1.8.2.1.1 for HCD or § 1.11 for SFM). The Matrix itself is an aid, not the legal authority.

If HCD adopted a chapter, does HCD always enforce it?

Not always. HCD adoption may carry enforcement authority for certain occupancies or situations (and the CRC notes exceptions); always read the HCD entry in Chapter 1 (§ 1.8.2.1.1) and the relevant statutes referenced there.

Are Matrix Adoption Tables legally binding?

No — the Matrix Adoption Tables are explicitly described as non‑regulatory aids intended to help users identify agency adoptions and amendments; statutory language in the agency sections and state law establish legal enforcement.

Where do I find contact info or clarification for a state agency adoption?

Chapter 1 provides agency acronyms, legend and contact information pages; the code directs users to Chapter 1 and the agency texts (e.g., HCD, SFM) for adoption details and contact points.

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