CPC · California Plumbing Code
Which state agencies adopt or amend Chapter 1 sections?
For a homeowner: the CPC tells you which state agency controls parts of Title 24 by listing each agency in Chapter 1 (look up the agency’s § — e.g., **§ 1.11.0** for the State Fire Marshal) and the chapter‑start Matrix Adoption Tables show which agency adopted or amended the specific sections you’re using.
Last reviewed: July 6, 2026
What the code requires — plain English
The California Plumbing Code assigns which state agencies may adopt or amend particular Title 24 (CPC) provisions by identifying each adopting agency and the Chapter 1 section that explains that agency’s authority and scope. The Office of the State Fire Marshal is the state fire adoption authority referenced at § 1.11.0. The CPC uses a set of agency-specific Chapter 1 sections (for example § 1.2.0, § 1.3.0, § 1.10.1, § 1.13.0, etc.) to show who may adopt or amend code language and the matrix adoption tables at chapter starts show which agency adopted or amended particular sections.
The single most important rule: the code tells you which state agency may adopt or amend a section by pointing to that agency’s Chapter‑1 authority section (for example § 1.11.0 for the Office of the State Fire Marshal) and the Matrix Adoption Tables show the specific adoptions/amendments.
Bolded defined terms and controlling § on first use above: Office of the State Fire Marshal and § 1.11.0.
Requirements in detail
Key concept: agency authority is in Chapter 1
- Chapter 1, Division I identifies the state agencies, their acronyms, and the Chapter‑1 section you must consult to determine an agency’s authority to adopt or amend code text. See the CPC front‑matter and Chapter 1 cross‑references for the list and legend.
- The CPC provides non‑regulatory Matrix Adoption Tables at the start of chapters (including Chapter 1) to show which agency: (a) adopted the entire model chapter, (b) adopted the chapter as amended (with amended sections listed), or (c) adopted only specific sections. Use those tables to determine the practical effect of an agency adoption.
Who the principal state agencies are (decision‑relevant dimensions)
Use the table below when deciding which agency’s adoptions/amendments control a Chapter‑1 item. The Code Reference column points you to the Chapter‑1 section that explains the agency’s authority in Title 24.
| Adopting agency (common name) | Acronym (used in CPC) | Typical adoption scope (decision dimension) | Code Reference |
|---|---|---|---|
| California Building Standards Commission | BSC / BSC‑CG | Statewide code publisher; CALGreen adoptions noted separately | § 1.2.0 |
| Board of State & Community Corrections | BSCC | Local detention facility standards | § 1.3.0 |
| Department of Consumer Affairs (boards & bureaus) | CA | Profession‑specific adoptions (boards) — e.g., pharmacy, barbering | § 1.6.0 (see legend) |
| Department of Food & Agriculture | AGR | Agriculture‑related occupancies/processes | § 1.6.0 |
| Department of Public Health | DPH | Public‑health / water systems elements | § 1.7.0 |
| Dept. of Housing & Community Development (variants) | HCD‑1, HCD‑2, HCD‑1/AC | Residential and special dwelling adoptions | § 1.8.2.x (see HCD entries) |
| Division of the State Architect (Access / Structural) | DSA‑AC, DSA‑SS, DSA‑SS/CC | Public schools, community colleges, state essential services | § 1.9.1 / § 1.9.2 |
| Office of Statewide Hospital Planning & Development | OSHPD 1–6 | Hospital/healthcare facility adoptions (multiple sub‑programs) | § 1.10.1–§ 1.10.6 |
| Office of the State Fire Marshal | SFM | Fire & life‑safety adoptions; note applicability to other agencies’ structures per § 1.11.0 | § 1.11.0 (see note) |
| State Librarian | SL | State library building adoptions | § 1.12.0 |
| Department of Water Resources | DWR | Water resources / water systems adoptions (Part 5 link) | § 1.13.0 |
| State Lands Commission | SLC | Marine oil terminals and lands commission items | § 1.14.0 |
Notes:
- The values in “Typical adoption scope” come from the CPC’s legend of acronyms and the Chapter‑1 cross‑references that appear in the code front matter and matrix tables. Use the specific Chapter‑1 section noted in “Code Reference” to read the statutory authority and enforcement responsibility.
- The Matrix Adoption Tables at the start of each chapter show the actual sections an agency adopted or amended (an “X” or amended‑section listing). Always check that table for the chapter you’re working in.
How the Office of the State Fire Marshal (SFM) fits in — the § 1.11.* block
- The CPC references the Office of the State Fire Marshal at § 1.11.0 as the SFM’s Chapter‑1 anchor (the CPC’s agency legend links SFM to § 1.11.0). Many chapters include a note that “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.” That phrase appears repeatedly in matrix notes across T‑24 parts (illustrating SFM’s cross‑agency applicability).
- The user‑uploaded materials include the CPC mapping to § 1.11.0, but the full, line‑by‑line text of § 1.11.1 through § 1.11.11 was not present in the retrieved files I searched. If you need the exact subsection language for § 1.11.1–§ 1.11.11, you’ll need to consult the full CPC Chapter 1 text (Title 24 Part 5) or provide the file containing those subsections. (I will not invent their text.)
Exceptions & special cases
- SFM cross‑applicability: Some chapters mark particular sections as not adopted by a listed state agency because SFM adoption applies to structures regulated by other agencies pursuant to § 1.11.0. In other words, where a chapter note flags SFM coverage, those sections may be enforced under SFM rules even though another agency otherwise regulates the occupancy. Check the chapter’s Matrix Adoption Table and the § 1.11.0 note.
- Matrix tables are non‑regulatory aids: the Matrix Adoption Tables are explicitly described as “non‑regulatory aids intended to show the user which state agencies have adopted and/or amended given sections of model code.” The legal text is the Title‑24 amendments and the Chapter‑1 agency sections; the matrix is a guide.
- Agency sub‑variants: Several agencies have multiple adoption tags (for example OSHPD 1, OSHPD 1R, OSHPD 2, and multiple HCD variants). Each sub‑tag points to a particular Chapter‑1 subsection describing that program’s scope; always use the exact sub‑tag in the Matrix table and consult the corresponding § (for example § 1.10.1 for OSHPD 1).
Common mistakes
- Assuming a single “state adoption” applies everywhere — check the Matrix Adoption Table for the chapter you’re using; different agencies adopt different chapters or specific sections (entire chapter, chapter as amended, or specific sections).
- Ignoring SFM cross‑references — where a chapter note ties adoption to § 1.11.0, SFM provisions may control fire/life‑safety matters even for occupancies regulated by another agency.
- Misreading acronyms — always match the acronym in a section leader or the matrix to the Chapter‑1 legend (e.g., DSA‑SS, HCD‑1/AC, OSHPD 1R). The legend is in the CPC front matter and Chapter‑1 cross‑references.
- Treating the Matrix Adoption Table as statutory text — the table helps find adoptions but the Chapter‑1 agency sections and the official state amendments are the controlling regulatory text.
Worked example — which agency controls a new hospital’s Chapter 1 adoptions?
Scenario: You are reviewing Chapter 1 requirements for a new acute‑care hospital.
Step 1 — identify the occupancy: an acute‑care hospital is regulated by OSHPD. The CPC maps OSHPD subprograms to Chapter‑1 sections; see § 1.10.1 (OSHPD 1) and related OSHPD subsections for the specific hospital program.
Step 2 — check the Matrix Adoption Table at the start of Chapter 1 and at chapters with fire or plumbing content you are using. The table will show whether OSHPD adopted the entire chapter, the chapter as amended, or only specific sections (it lists “X” marks or amended subsections). If OSHPD shows adoption of the chapter as amended (or selected sections), those OSHPD amendments control OSHPD‑regulated hospitals.
Step 3 — check SFM applicability: many chapters include the phrase that SFM adoptions apply to structures regulated by other agencies pursuant to § 1.11.0; for fire and life‑safety plumbing items SFM may assert authority per § 1.11.0. So for a hospital you must check both § 1.10.1 (OSHPD) and § 1.11.0 (SFM) and the Matrix tables for the chapters involved.
Numeric example (quick): If Chapter X lists the Matrix row “Adopt entire chapter as amended” with an “X” under OSHPD 1 and the same chapter shows SFM with an “X” for selected fire sections (or includes the SFM note referencing § 1.11.0), then:
- Non‑fire plumbing provisions → governed by OSHPD 1’s adopted text (see § 1.10.1).
- Fire/life‑safety plumbing provisions → may be governed by SFM adoptions under § 1.11.0, as noted in the chapter matrix. Always list the controlling Section numbers from the Matrix for your submittal.
Related provisions (CPC Chapter 1 cross‑references)
- § 1.2.0 — California Building Standards Commission (BSC) (agency legend and CALGreen)
- § 1.3.0 — Board of State & Community Corrections (BSCC)
- § 1.4.0 / § 1.6.0 — Department of Consumer Affairs / Department of Food & Agriculture (boards & bureaus)
- § 1.7.0 — Department of Public Health (DPH)
- § 1.8.2.x — Department of Housing & Community Development (HCD variants)
- § 1.9.1 / § 1.9.2 — Division of the State Architect (DSA‑AC, DSA‑SS)
- § 1.10.1 – § 1.10.6 — Office of Statewide Hospital Planning & Development (OSHPD 1–6)
- § 1.11.0 — Office of the State Fire Marshal (SFM) (anchor for SFM adoptions; see SFM notes in chapter matrices)
- § 1.12.0 — State Librarian (SL)
- § 1.13.0 — Department of Water Resources (DWR) (Part 5)
- § 1.14.0 — State Lands Commission (SLC)
I relied on the CPC front matter, the Chapter‑1 legend and the Matrix Adoption Table descriptions found in the uploaded code material to prepare this guide. The uploaded materials explicitly map agency acronyms to Chapter‑1 sections (for example SFM → § 1.11.0, OSHPD → § 1.10.1, etc.) and repeatedly remind users to use the Matrix Adoption Tables and the Chapter‑1 agency sections to determine which agency’s adoptions apply.
If you want, I can:
- Pull the exact wording of § 1.11.0 and any available § 1.11.1–§ 1.11.11 (if you upload the full CPC Chapter‑1 PDF or point me to it), or
- Walk through the Matrix Adoption Table for a specific Chapter (example: Chapter 4 or Chapter 11) and identify which agency adopted or amended each listed section for that chapter.
Code references
Grounded in the retrieved California Plumbing Code — click a citation to read the verbatim passage:
CPC § 1.2.0 High 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 PLUMBING 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 UPC 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 PLUMBING 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-
CGSFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 Col17 BSCC DPH AGR DWR CEC CA SL SLC
Adopting AgencyBSC BSC-
CGSFM 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 ChapterX
Adopt Entire Chapter as
amended (amended
sections listed below)S A M P L E
Adopt only those sections
that are listed below
Chapter/Section202 Adopt the entire UPC 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.
CPC § 1.11.0. High relevance — show source text
Agency
Adopt Entire Chapter
Adopt Entire Chapter as
amended (amended
sections listed below)
Adopt only those sections
that are listed below
Chapter/Section|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| |Adopting Agency
Adopt Entire Chapter
Adopt Entire Chapter as
amended (amended
sections listed below)
Adopt only those sections
that are listed below
Chapter/Section|||X|||||||X|X|X|X|X|X|X||||||||| |Adopting Agency
Adopt Entire Chapter
Adopt Entire Chapter as
amended (amended
sections listed below)
Adopt only those sections
that are listed below
Chapter/Section||||||||||||||||||||||||| |Adopting Agency
Adopt Entire Chapter
Adopt Entire Chapter as
amended (amended
sections listed below)
Adopt only those sections
that are listed below
Chapter/Section||||||||||||||||||||||||| |Adopting Agency
Adopt Entire Chapter
Adopt Entire Chapter as
amended (amended
sections listed below)
Adopt only those sections
that are listed below
Chapter/Section||||||||||||||||||||||||| |Adopting Agency
Adopt Entire Chapter
Adopt Entire Chapter as
amended (amended
sections listed below)
Adopt only those sections
that are listed below
Chapter/Section|||||||||||||||||||||||||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.
2025 CALIFORNIA PLUMBING CODE 303
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304 2025 CALIFORNIA PLUMBING CODE
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CHAPTER 14
FIRESTOP PROTECTION
1401.0 General.
1401.1 Applicability. Piping penetrations of required fireresistance-rated walls, partitions, floors, floor/ceiling assemblies, roof/ceiling assemblies, or shaft enclosures shall be protected in accordance with the requirements of the building code, and this chapter.
1402.0 Construction Documents.
1402.1 Penetrations. Construction documents shall indicate with sufficient detail how penetrations of fire-resistancerated assemblies shall be firestopped prior to obtaining design approval.
1403.0 Installation.
1403.1 Materials. Firestop systems shall be installed in accordance with this chapter, the building code, and the manufacturer’s installation instructions.
CPC § 1.12 High relevance — show source text
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 IEBC 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 EXISTING BUILDING 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.)
Adopting agency BSC BSC-
CGSFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 Col17 BSCC DPH AGR DWR CA SL SLC Adopting agency BSC BSC-
CGSFM 1 2 1-AC AC SS SS/CC 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 Adopt entire chapter X Adopt entire chapter as
amended (amended
sections listed below)Adopt only those sections
that are listed belowS A M P L E Chapter/Section CPC § 1.13 High relevance — show source text
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.)
Adopting agency BSC BSC-
CGSFM HCD Col6 Col7 DSA Col9 Col10 OSHPD Col12 Col13 Col14 Col15 Col16 Col17 BSCC DPH AGR DWR CA SL SLC Adopting agency BSC BSC-
CGSFM 1 2 1-AC AC SS SS/CC 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 Adopt entire chapter X Adopt entire chapter as
amended (amended
sections listed below)Adopt only those sections
that are listed belowS A M P L E Chapter/Section Adopt the entire IRC chapter as amended, state-amended sections are listed below:
If there is an “X” under a particular state agency’s acronym on this row, it means that particular state agency has adopted the entire model code chapter; with state amendments.
CPC § 1101.4 High relevance — show source text
(Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
Adopting Agency BSC BSC-
CGSFM 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-
CGSFM 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 X X Adopt Entire Chapter as
amended (amended
sections listed below)X X X X X X X X Adopt only those sections
that are listed belowChapter/Section 1101.4 X X X X X X X X 1101.4.2.1 X 1101.4.2.2 X X X X X 1101.6_ Exception_ X 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.
2025 CALIFORNIA PLUMBING CODE 203
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204 2025 CALIFORNIA PLUMBING CODE
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
CHAPTER 11
STORM DRAINAGE
1101.0 General.
1101.1 Applicability. This chapter shall govern the materials, design, and installation of storm water drainage systems. 1101.2 Where Required. Roofs, paved areas, yards, courts, courtyards, vent shafts, light wells, or similar areas having rainwater, shall be drained into a separate storm sewer system, or into a combined sewer system where a separate storm sewer system is not available, or to some other place of disposal satisfactory to the Authority Having Jurisdiction.
CPC § 1.1 High relevance — show source text
Adopting agency BSC BSC-
CGSFM 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-
CGSFM 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 X X X X X Adopt entire chapter as
amended (amended
sections listed below)X X X X X X X Adopt only those sections
that are listed belowChapter / Section 2401.1.1 X X X X X X X 2401.1.2 X X X X X X X 2403.2.1 X X X X X X X Table 2403.2.1 X X X X X X X 2410 X X X X X X X 2410.1, Exception X 2410.1.2, Exception X X 2411 X X X X X 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.
2025 CALIFORNIA BUILDING CODE 24-1
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24 GLASS AND GLAZING
User notes:
CPC § 3.0 High relevance — show source text
0|100|–|100|100 x 1 x3⁄4 = 75|–| |Service Sinks|27|3.0|81|–|27|27 x 3 x3⁄4 = 61|–| |Total|–|–|1365|252|–|154|55|
For SI units: 1 gallon per minute = 0.06 L/s, 1 pound-force per square foot = 6.8947 kPa
Allowing for 15 psi (103 kPa) at the highest fixture under the maximum demand of 252 gallons per minute (15.90 L/s), the pressure available for friction loss is found by the following:
55 – [15 + (45 x 0.43)] = 20.65 psi (142.38 kPa)
The allowable friction loss per 100 feet (30 480 mm) of the pipe is, therefore:
100 x 20.65 ÷ 200 = 10.32 psi (71.15 kPa)
2025 CALIFORNIA PLUMBING CODE 379
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
380 2025 CALIFORNIA PLUMBING CODE
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CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE
APPENDIX B - EXPLANATORY NOTES ON COMBINATION WASTE AND VENT SYSTEMS
(Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
Adopting Agency BSC BSC-
CGSFM 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-
CGSFM 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 X X X X X X X X Adopt Entire Chapter as
amended (amended
sections listed below)Adopt only those sections
that are listed belowChapter/Section 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.
CPC § 101.1. High relevance — show source text
ORDINANCE NO.
An ordinance of the [JURISDICTION] adopting the 2024 edition of the Uniform Plumbing Code, regulating and controlling the design, construction, quality of materials, erection, installation, alteration, repair, location, relocation, replacement, addition to, use or maintenance of plumbing systems in the [JURISDICTION]; providing for the issuance of permits and collection of fees therefor; repealing Ordinance No. of the [JURISDICTION] and all other ordinances and parts of the ordinances in conflict therewith.
The [GOVERNING BODY] of the [JURISDICTION] does ordain as follows:
Section 1 Codes Adopted by Reference. That certain documents, three (3) copies of which are on file in the office of the [JURISDICTION'S KEEPER OF RECORDS] and the [JURISDICTION], being marked and designated as the 2024 Uniform Plumbing Code, including Appendix Chapters [FILL IN THE APPENDIX CHAPTERS BEING ADOPTED], as published by the International Association of Plumbing and Mechanical Officials, be and is hereby adopted as the Code of the [JURISDICTION], in the State of [STATE NAME] regulating and controlling the design, construction, quality of materials, erection, installation, alteration, repair, location, relocation, replacement, addition to, use or maintenance of plumbing systems as herein provided; providing for the issuance of permits and collection of fees therefor; and each and all of the regulations, provisions, penalties, conditions and terms of such 2024 Uniform Plumbing Code on file in the office of the
[JURISDICTION] are hereby referred to, adopted, and made a part hereof, as if fully set out in this ordinance.
Section 2 Modifications. The following sections are hereby revised: Section 101.1. Insert: [NAME OF JURISDICTION] Section 104.5. Insert: [APPROPRIATE FEE SCHEDULE]
Section 3 Conflicting Ordinances Repealed. That Ordinance No. of [JURISDICTION] entitled
[TITLE OF THE ORDINANCE OR ORDINANCES IN EFFECT AT THE PRESENT TIME SO THAT THEY WILL BE REPEALED BY MENTION] and all other ordinances or parts of ordinances in conflict herewith are hereby repealed.
Section 4 Preemption. [JURISDICTION] hereby fully occupies and preempts the entire field of regulation of design, construction, quality of materials, erection, installation, alteration, repair, location, relocation, replacement, addition to, use or maintenance of plumbing systems; and provision for the issuance of permits and collection of fees therefor; within the boundaries of [JURISDICTION]. [AS APPROPRIATE] Cities, towns, and counties or other municipalities may enact only those laws and ordinances relating to this field as specifically authorized by state law and consistent with this ordinance. Local laws and ordinances that are inconsistent with, more restrictive than, or exceed the requirements of [ORDINANCE NO.] shall not be enacted and are hereby expressly preempted and repealed, regardless of the nature of the code, charter, or home rule status of such city, town, county, or municipality.
CPC § 1.4 High relevance — show source text
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 v of this code.
To learn more about the use of this code refer to pages vii 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 WILDLAND-URBAN INTERFACE 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 nonregulatory 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 of the California Building Code for agency authority, building applications and enforcement responsibilities.
The side headings identify the scope of state agencies’ adoption as follows:
Adopt the entire IWUIC 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 WILDLAND-URBAN INTERFACE 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.)
CPC § 1.11. High relevance — show source text
Adopting Agency BSC BSC-
CGSFM 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-
CGSFM 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 belowChapter / 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.
2025 CALIFORNIA EXISTING BUILDING CODE APPENDIX C-25
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APPENDIX C-26 2025 CALIFORNIA EXISTING BUILDING CODE
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APPENDIX C—GUIDELINES FOR THE WIND RETROFIT OF EXISTING BUILDINGS
CHAPTER C2 ROOF DECK FASTENING FOR HIGH-WIND AREAS
SECTION C201—GENERAL
[BS] C201.1 Purpose. This chapter provides prescriptive methods for partial structural retrofit of an existing building to increase its resistance to wind loads. It is intended for voluntary use where the basic wind speed, V, is greater than 130 mph (58 m/s) in accordance with Figure 1609.3(2) of the California Building Code and for reference by mitigation programs. The provisions of this chapter do not necessarily satisfy requirements for new construction. Unless specifically cited, the provisions of this chapter do not necessarily satisfy requirements for structural improvements triggered by addition, alteration, repair, change of occupancy, building relocation or other circumstances.
[BS] C201.2 Eligible conditions. The provisions of this chapter are applicable only to buildings that meet either of the following eligibility requirements:
- Buildings assigned to Risk Category I or II in accordance with Table 1604.5 of the California Building Code .
- Buildings within the scope of the California Residential Code .
SECTION C202—ROOF DECK ATTACHMENT FOR WOOD ROOFS
CPC § 2.0 High relevance — show source text
2| |8|Laundry Faucet|0|2.0|2.0|2.0| |9|Lavatory Faucet|1|2.0|1.5|1.5| |10|Shower, per head|0|4.5|2.0|2.0| |11|Water Closet, 1.28 GPF Gravity Tank|0|1.0|3.0|3.0| |12|Other Fixture 1|0|0.0|0.0|6.0| |13|Other Fixture 2|0|0.0|0.0|6.0| |14|Other Fixture 3|0|0.0|0.0|6.0| |Total Number of Fixtures|Total Number of Fixtures|5||RESET|RUN WATER DEMAND
CALCULATOR| |99th Percentile Demand Flow =|99th Percentile Demand Flow =|7.7 GPM||||For SI units: 1 gallon per minute = 0.66 L/s, 1 gallon = 3.785 L
FIGURE 5 WATER DEMAND CALCULATOR FOR THE HOT WATER BRANCH (EXAMPLE 4)
524 2025 CALIFORNIA PLUMBING CODE
), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE
APPENDIX N - IMPACT OF WATER TEMPERATURE ON THE POTENTIAL FOR SCALDING AND LEGIONELLA GROWTH
(Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
Adopting Agency BSC BSC-
CGSFM 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-
CGSFM 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 X X X X X X X Adopt Entire Chapter as
amended (amended
sections listed below)Adopt only those sections
that are listed belowChapter/Section CPC § 10.4 High 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
SPCB Structural Pest Control Board
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 PLUMBING 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 UPC 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 PLUMBING 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.)
CPC § 1.10.4 High 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.)
CPC § 1.10.1 High relevance — show source text
OSHPD 1 Office of Statewide Hospital Planning and Development (see Section 1.10.1)
OSHPD 1R Office of Statewide Hospital Planning and Development (see Section 1.10.1)
OSHPD 2 Office of Statewide Hospital Planning and Development (see Section 1.10.2)
OSHPD 3 Office of Statewide Hospital Planning and Development (see Section 1.10.3)
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 v of this code.
To learn more about the use of this code, refer to pages vii through 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 BUILDING 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 nonregulatory 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 IBC 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 BUILDING 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.)
CPC § 1.2 Medium relevance — show source text
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
How to Distinguish Between Model Code Language and California Amendments
To distinguish between model code language and the incorporated California amendments, including exclusive California standards, 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)
DSA-SS/CC Division of the State Architect-Structural Safety/Community Colleges (see Section 1.9.2.2)
OSHPD 1 Office of Statewide Hospital Planning and Development (see Section 1.10.1)
OSHPD 1R Office of Statewide Hospital Planning and Development (see Section 1.10.1)
OSHPD 2 Office of Statewide Hospital Planning and Development (see Section 1.10.2)
OSHPD 3 Office of Statewide Hospital Planning and Development (see Section 1.10.3)
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)
CPC § 1.2 Medium relevance — show source text
For questions on California state agency amendments, please refer to the contact list on page v.
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LEGEND FOR AGENCY ADOPTIONS
Unless otherwise noted, state agency adoptions are indicated by the following banners in the section leaders: Department of Housing and Community Development: [HCD]
California Building Standards Commission, CALGreen: [BSC-CG]
Division of the State Architect, Structural Safety: [DSA-SS]
Office of Statewide Hospital Planning and Development: [OSHPD 1, 2 & 4]
See Chapter 1, Sections 103–106 for applications regulated by the respective state agencies.
EFFECTIVE USE OF THIS CODE
The format of this code is common to other parts of the California Building Standards Code and contains building standards applicable to occupancies which fall under the authority of different state agencies. Occupancies and applications under the authority of a specific state agency are identified in Chapter 1, Sections 103 through 106. Sections of this code which are applicable and adopted by each state agency are identified in the Matrix Adoption Tables located at the beginning of each chapter. The following outline is provided as a guide to establish which provisions are applicable to a specific occupancy.
Establish the type of occupancy.
Verify which state agency has authority for the established occupancy by reviewing the authorities list in Sections 103 through
Once the appropriate agency has been identified, find the chapter which covers the established occupancy.
The Matrix Adoption Tables at the beginning of Chapters 4 and 5 identify the required green building measures necessary to meet the minimum requirements of this code for the established occupancy.
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. Each measure listed in the application checklist has a section number which correlates to a section where more information about the specific measure is available.
The Application Checklist identifies which measures are required by this code and allows users to check-off which voluntary items have been selected to meet voluntary tier levels if desired or mandated by a city, county, or city and county.
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CALIFORNIA CODE OF REGULATIONS, TITLE 24
California State Agency Contact List
The following state agencies may propose building standards for buildings, structures and applications under their authority for publication in Title 24. Notice of such proposals may be requested from each agency. See Sections 1.2 through 1.14 of the California Building Code (Part 2, T24) for detailed information on the regulatory authority of most state agencies summarized below. Note [agency acronyms] shown in banners/Matrix Adoption Tables in T24.
Board of State and Community Corrections [BSCC] bscc.ca.gov BSCC-Mail@bscc.ca.gov
(916) 445-5073 Local Detention Facilities
Building Standards Commission [BSC, BSC-CG]
dgs.ca.gov/BSC cbsc@dgs.ca.gov
(916) 263-0916 State Buildings including UC & CSU Nonresidential Green Buildings Standards
Department of Consumer Affairs Boards/Bureaus:
Acupuncture Board [CA]
Frequently asked questions
Which single section tells me about the State Fire Marshal’s authority?
The CPC points to § 1.11.0 as the Office of the State Fire Marshal’s Chapter‑1 anchor; matrix notes across the code reference SFM applicability pursuant to § 1.11.0.
How do I know whether an agency adopted the entire chapter or only sections?
Check the Matrix Adoption Table at the start of the chapter: rows show “Adopt entire chapter,” “Adopt entire chapter as amended (amended sections listed below),” or “Adopt only those sections that are listed below.” The matrix is a non‑regulatory aid; the Chapter‑1 agency section and the state amendments are controlling.
If an OSHPD hospital and SFM both appear in a chapter, whose amendment controls?
Use the Matrix table and the Chapter‑1 agency sections: OSHPD controls hospital‑specific adoptions (see § 1.10.1 etc.), but SFM adoptions may apply to fire/life‑safety matters for structures regulated by other agencies pursuant to § 1.11.0. Consult both the relevant OSHPD § and § 1.11.0, plus the chapter matrix.
Are the Matrix Adoption Tables legally binding?
The Matrix Adoption Tables are described as “non‑regulatory aids” to help users find which agency adopted or amended which sections; the official regulatory text is the Title‑24 state amendments and the Chapter‑1 agency sections. Always cross‑check with the official state amendments.
I need the exact text of § 1.11.3 — do you have it?
In the provided files I found the mapping to § 1.11.0 and repeated matrix notes referencing § 1.11.0, but I did not find the full printed text for § 1.11.1–§ 1.11.11. If you supply the CPC Chapter‑1 PDF (or allow me to search additional files), I can extract those exact subsection texts.
More in California Plumbing Code
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- Water Heaters
- Water Supply and Distribution
- Sanitary Drainage (Drain, Waste, and Vent)
- Indirect Wastes
- Vents
- Traps and Interceptors
- Storm Drainage
- Fuel Gas Piping
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- Alternate Water Sources and Nonpotable Rainwater Catchment Systems
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