Which state or local agencies enforce CMC provisions?

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

• CMC § 2.7 High relevance — show source text

  (2) The Attorney General, in the name of the people of the State of California, and the city attorney or county counsel in the jurisdiction in which the rental unit is located, in the name of the city or county, may do both of the following:

  (A) Enforce the provisions of this section. (B) Seek injunctive relief based on violations of this section. (3) In an action pursuant to this subdivision for injunctive relief, it shall be presumed that a tenant suffers irreparable harm through violation of this section.

  (4) An action pursuant to this subdivision shall not be brought after the date that is three years from the date on which the cause of action accrued.

  ( l ) Any waiver of the rights under this section shall be void as contrary to public policy.

  (m) (1) The Legislature finds and declares that the unique circumstances of the current housing crisis require a statewide response to address rent gouging by establishing statewide limitations on gross rental rate increases.

  (2) It is the intent of the Legislature that this section should apply only for the limited time needed to address the current statewide housing crisis, as described in paragraph (1). This section is not intended to expand or limit the authority of local governments to establish local policies regulating rents consistent with Chapter 2.7 (commencing with Section 1954.50), nor is it a statement regarding the appropriate, allowable rental rate increase when a local government adopts a policy regulating rent that is otherwise consistent with Chapter 2.7 (commencing with Section 1954.50).

  (3) Nothing in this section authorizes a local government to establish limitations on any rental rate increases not otherwise permissible under Chapter 2.7 (commencing with Section 1954.50), or affects the existing authority of a local government to adopt or maintain rent controls or price controls consistent with that chapter.

  (n) This section shall become operative on April 1, 2024. (o) This section shall remain in effect until January 1, 2030, and as of that date is repealed.

  (Repealed (in Sec. 3) and added by Stats. 2023, Ch. 290, Sec. 4. (SB 567) Effective January 1, 2024. Operative April 1, 2024, by its own provisions. Repealed as of January 1, 2030, by its own provisions.)

• CRC § 66323 High relevance — show source text

  Any questions regarding the application of State ADU Law may be submitted to HCD via the online ADU Portal. Please provide as much detail as possible in the online form. HCD may request additional information, including, but not limited to denials and communications from the local agency.

  Local agencies seeking assistance or submitting an ADU ordinance to HCD, must also use the online portal.

  For those experiencing technical issues with the ADU Portal, please email: ADUPortal@hcd.ca.gov.

  Questions beyond what this Handbook provides are encouraged to contact their local permitting agency (e.g., city or county) or private attorney.

  Enforcement of State ADU Law Since 2016, HCD has had statutory authority to review local agencies’ ADU ordinances, and as of January 1, 2024, HCD also has the authority to enforce all State ADU Laws. HCD’s ADU team reviews local ordinances for compliance with State ADU Law and sends

  6

  findings letters and, when necessary, may escalate its enforcement. To ensure consistency, the HAU works closely with other HCD divisions.

  The ADU team is committed to supporting the public, local agencies, and partner agencies with understanding and complying with State ADU Law.

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  Glossary

  66323 Units One of the four delineated types of ADUs (and JADUs) that must be permitted pursuant to Government Code section 66323. Source: Government Code section 66323

  Accessory Dwelling Unit (ADU) An attached or a detached residential dwelling unit that provides complete, independent living facilities for one or more persons, and is located on a lot with a proposed or existing primary residence. It shall include permanent provisions for living, sleeping, eating, cooking, and sanitation on the same parcel as the single-family or multifamily dwelling is, or will be, situated.

  An ADU also includes the following: (A) An efficiency unit. (B) A manufactured home, as defined in Section 18007 of the Health and Safety Code. Source: Government Code section 66313, subdivision (a)

  Accessory Structure A structure that is accessory and incidental to a dwelling located on the same lot. Source: Government Code section 66313, subdivision (b)

  Applicant The person or party responsible for the submittal of an application seeking a permit.

  Application A formal request to perform work, which includes all information as required.

  Certificate of Occupancy A document issued by local California Building and Safety departments which certifies that a commercial space or newly constructed residential building has been inspected for compliance with the California Building Standards Code and local ordinances which govern construction and occupancy. Source: 2022 California Residential Code section R110

  Common Interest Development Any of the following:

  (a) A community apartment project. (b) A condominium project. (c) A planned development. (d) A stock cooperative. Source: Civil Code section 4100

  Covenants, Conditions, and Restrictions (CC&Rs) A set of rules governing the use of a certain piece of real estate in each community. “Governing documents” includes declarations, bylaws, operating rules, articles of incorporation, or articles of association, which govern the operation of the common interest

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  development or association. Source: Civil Code section 4150

• CMC § 1.2.3.2 High relevance — show source text

  1.2.3.2 Tests. Whenever there is insufficient evidence of compliance with the provisions of this code, or evidence that a material or method does not conform to the requirements of this code, or in order to substantiate claims for alternative materials or methods, the building official shall have the authority to require tests as evidence of compliance to be made at no expense to the jurisdiction. Test methods shall be as specified in this code or by other recognized test standards. In the absence of recognized and accepted test meth- ods, 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.

  SECTION 1.3—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.

  Application— Local detention facilities.

  Enforcing agency— Board of State and Community Corrections.

  Authority cited— Penal Code Section 6030; Welfare and Institutions Code Sections 207.1, 210 and 885.

  Reference— Penal Code Section 6030; Welfare and Institutions Code Sections 207.1, 210 and 885.

  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.

  SECTION 1.4—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. 1. Board of Barbering and Cosmetology.

  Application— Any establishment or mobile unit where barbering, cosmetology or electrolysis is being performed.

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

  Authority cited— Business and Professions Code Section 7312.

  Reference— Business and Professions Code Sections 7303, 7303.1, 7312 and 7313.

  2. Acupuncture Board.

  Application— Acupuncture offices.

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

  Authority cited— Business and Professions Code Section 4933.

  Reference— Business and Professions Code Sections 4928, 4928.1 and 4933.

  3. Board of Pharmacy.

  Application— Pharmacies.

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

  Authority cited— Business and Professions Code Section 4005.

  Reference— Business and Professions Code Sections 4005, 4127.7 and 4201.

  4. Veterinary Medical Board.

  Application— Veterinary facilities.

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

• CMC § 18934.7. High relevance — show source text

  Application— Building seismic retrofit standards including abating falling hazards of structural and nonstructural compo- nents 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 adopted pursuant to Health and Safety Code (commencing) with Section 17910.

  Enforcing agency— State or local agency specified by 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 author- ity 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 author- ity to adopt and enforce such provisions of this code, unless otherwise stated. 1. Green buildings 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.

  Reference — Health and Safety Code, Division 13, Part 2.5, commencing with Section 18901. 2. Graywater systems for nonresidential occupancies.

  — Application The construction, installation and alteration of graywater systems for indoor and outdoor uses in nonresiden- tial occupancies.

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

  — Authority cited Health and Safety Code Section 18941.8.

• CMC § 1.2.1.1 High relevance — show source text

  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.

  Reference— Health and Safety Code, Division 13, Part 2.5, commencing with Section 18901. 2. Graywater systems for nonresidential occupancies.

  Application— The construction, installation and alteration of graywater systems for indoor and outdoor uses in nonresidential occupancies.

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

  Authority cited— Health & Safety Code Section 18941.8.

  Reference— Health & Safety Code Section 18941.8.

  1.2.2.1 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-CG .

  1.2.3 Alternative materials, design and methods of construction and equipment. The provisions of this code are not intended to prevent the installation of any material or to prohibit any design or method of construction not specifically prescribed by this code, provided that any such alternative has been approved. An alternative material, design or method of construction shall be approved where the building official finds that the proposed design is satisfactory and complies with the intent of the provisions of this code, and that the material, method or work offered is, for the purpose intended, at least the equivalent of that prescribed in this code in quality, strength, effectiveness, fire resistance, durability and safety.

  1.2.3.1 Research reports. Supporting data, where necessary to assist in the approval of materials or assemblies not specifically provided for in this code, shall consist of valid research reports from approved sources.

  1-6 2025 CALIFORNIA EXISTING BUILDING CODE

• CMC § 8-102.1.1 High relevance — show source text

  2. State agencies. All state agencies shall apply the provisions of the CHBC in permitting repairs, alterations and additions necessary for the preservation, restoration, rehabilitation, safety, relocation, reconstruction or continued use of qualified historical buildings or properties.

  8-102.1.1 Additions, alterations and repairs. It is the intent of the CHBC to allow nonhistorical expansion or addition to a qualified historical building or property, provided nonhistorical additions shall conform to the requirements of the regular code (as defined in Chapter 8-2).

  8-102.1.2 Relocation. Relocated qualified historical buildings or properties shall be sited to comply with the regular code or with the solutions listed in the CHBC. Nonhistorical new construction related to relocation shall comply with the regular code. Reconstruction and restoration related to relocation is permitted to comply with the provisions in the CHBC.

  8-102.1.3 Change of occupancy. For change of use or occupancy, see Chapter 8-3, Use and Occupancy.

  8-102.1.4 Continued use. Qualified historical buildings or properties may have their existing use or occupancy continued if such use or occupancy conformed to the code or to the standards of construction in effect at the time of construction, and such use or occupancy does not constitute a distinct hazard to life safety as defined in the CHBC.

  8-102.1.5 Unsafe buildings or properties. When a qualified historical building or property is determined to be unsafe as defined in the regular code, the requirements of the CHBC are applicable to the work necessary to correct the unsafe conditions. Work to remediate the buildings or properties need only address the correction of the unsafe conditions, and it shall not be required to bring the entire qualified historical building or property into compliance with regular code.

  8-102.1.6 Additional work. Qualified historical buildings or properties shall not be subject to additional work required by the regular code, regulation or ordinance beyond that required to complete the work undertaken. Certain exceptions for accessibility and for distinct hazards exist by mandate and may require specific action, within the parameters of the CHBC.

  SECTION 8-103 — ORGANIZATION AND ENFORCEMENT

  8-103.1 Authority. The state or local enforcing agency, pursuant to authority provided under Section 18954 of the Health and Safety Code, shall administer and enforce the provisions of the CHBC in permitting repairs, alterations and additions necessary for the preservation, restoration, reconstruction, rehabilitation, relocation or continued use of a qualified historical building or property.

  8-103.2 State enforcement. All state agencies pursuant to authority provided under Section 18954 and Section 18961 of the Health and Safety Code shall administer and enforce the CHBC with respect to qualified historical buildings or properties under their respective jurisdiction.

  8-103.3 Liability. Prevailing law regarding immunity of building officials is unaffected by the use and enforcement of the CHBC.

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  ADMINISTRATION

  SECTION 8-104 — REVIEW AND APPEALS

  8-104.1 State Historical Building Safety Board (SHBSB or Board). In order to provide for interpretation of the provisions of the CHBC and to hear appeals, the SHBSB shall act as an appeal and review body to state and local agencies or any affected party.

  **8-104.2 SHBSB review.

• CMC § 8-102.1.6 Medium relevance — show source text

  8-102.1.6 Additional work. Qualified historical buildings or properties shall not be subject to additional work required by the regular code, regulation or ordinance beyond that required to complete the work undertaken. Certain exceptions for accessibility and for distinct hazards exist by mandate and may require specific action, within the parameters of the CHBC.

  SECTION 8-103 — ORGANIZATION AND ENFORCEMENT

  8-103.1 Authority. The state or local enforcing agency, pursuant to authority provided under Section 18954 of the Health and Safety Code, shall administer and enforce the provisions of the CHBC in permitting repairs, alterations and additions necessary for the preservation, restoration, reconstruction, rehabilitation, relocation or continued use of a qualified historical building or property.

  8-103.2 State enforcement. All state agencies pursuant to authority provided under Section 18954 and Section 18961 of the Health and Safety Code shall administer and enforce the CHBC with respect to qualified historical buildings or properties under their respective jurisdiction.

  8-103.3 Liability. Prevailing law regarding immunity of building officials is unaffected by the use and enforcement of the CHBC.

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  ADMINISTRATION

  SECTION 8-104 — REVIEW AND APPEALS

  8-104.1 State Historical Building Safety Board (SHBSB or Board). In order to provide for interpretation of the provisions of the CHBC and to hear appeals, the SHBSB shall act as an appeal and review body to state and local agencies or any affected party.

  8-104.2 SHBSB review. When a proposed design, material or method of construction is being considered by the enforcing agency, the agency chief, the building official or the local board of appeals may file a written request for opinion to the SHBSB for its consideration, advice or findings. In considering such request, the SHBSB may seek the advice of other appropriate private or public boards, individuals, or state or local agencies. The SHBSB shall, after considering all of the facts presented, including any recommendation of other appropriate boards, agencies or other parties, determine if, for the purpose intended, the proposal is reasonably equivalent to that allowed by these regulations in proposed design, material or method of construction, and it shall transmit such findings and its decision to the enforcing agency for its application. The Board may recover the costs of such reviews and shall report the decision in printed form, copied to the California Building Standards Commission.

  8-104.2.1 State agencies. All state agencies with ownership of, or that act on behalf of state agency owners of, qualified historical buildings or properties, shall consult and obtain SHBSB review prior to taking action or making decisions or appeals that affect qualified historical buildings or properties, per Section 18961 of the Health and Safety Code.

  8-104.2.2 Imminent threat. Where an emergency is declared and a qualified historical building or property is declared an imminent threat to life and safety, the state agency assessing such a threat shall consult with the SHBSB before any demolition is undertaken, per Section 18961 of the Health and Safety Code.

• CMC § 101.7.1. Medium relevance — show source text

  This code does not limit the authority of city, county, or city and county governments to make necessary changes to the provisions contained in this code pursuant to Section 101.7.1. The effective date of amendments, additions or deletions to this code for cities, counties, or cities and counties filed pursuant to Section 101.7.1 shall be the date on which it is filed. However, in no case shall the amendments, additions or deletions to this code be effective any sooner than the effective date of this code.

  Local modifications shall comply with Health and Safety Code Section 18941.5(b) for Building Standards Law, Health and Safety Code Section 17958.5 for State Housing Law or Health and Safety Code Section 13869.7 for Fire Protection Districts.

  101.7.1 Findings and filings.

  1. The city, county, or city and county shall make express findings for each amendment, addition or deletion based upon climatic, topographical or geological conditions. For the purpose of this section, climatic, topographical or geological conditions include local environmental conditions as established by the city, county, or city and county.

  2. The city, county, or city and county shall file the amendments, additions or deletions expressly marked and identified as to the applicable findings. Cities, counties, cities and counties, and fire departments shall file the amendments, additions or deletions and the findings with the California Building Standards Commission at 2525 Natomas Park Drive, Suite 130, Sacramento, CA 95833.

  3. Findings prepared by fire protection districts shall be ratified by the local city, county, or city and county and filed with the California Department of Housing and Community Development at 9342 Tech Center Drive, Suite 500, Sacramento, CA 95826.

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

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

  1. Section 1.2.3 in the California Building Code (CBC) for the California Building Standards Commission.
  2. Section 104.2.3 in the California Building Code (CBC) for the Division of the State Architect.
• CMC § 1.5 Medium relevance — show source text

  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 Cali- fornia State University – Building 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 Agency – State or local agency specified by the applicable provisions of law.

  Authority Cited – Government Code Section 16600.

  References – Government Code Sections 16600 through 16604.

  (4) Unreinforced Masonry Bearing Wall Buildings.

  Application – Minimum seismic strengthening standards for buildings specified in the California Existing Building Code, except for buildings subject to building standards adopted pursuant to Part 1.5 (commencing with Section 17910).

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

  Authority Cited – Health and Safety Code Section 18934.7.

  References – Health 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 & California Department of Corrections and Rehabilita- tion] 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 Occu- pancies.

  Application – All occupancies where no other state agency has the authority to adopt green building stan- dards 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, 18938 and 18940.5.

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

  (2) Graywater Systems for Nonresidential Occupancies.

• CMC § 0.34 Medium relevance — show source text

  32 to 0.34|250|4.5|5.0|5.0|5.0|5.0| |251 to 350|0.29 to 0.32|200|3.0|4.0|4.5|4.5|4.5| |201 to 250|0.27 to 0.30|150|2.5|2.5|2.5|3.0|3.0| |141 to 200|0.25 to 0.29|125|1.5|1.5|2.0|2.0|2.0| |105 to 140|0.22 to 0.28|100|1.0|1.0|1.5|1.5|1.5|

  For SI units: °C=(°F-32)/1.8, 1 inch = 25 mm, 1 British thermal unit inch per hour square foot degree Fahrenheit = [0.1 W/(m•K)]

  Notes: 1 For insulation outside the stated conductivity range, the minimum thickness ( T ) shall be determined as follows: T = r {(1 + t / r ) [K] [/] [k ] – 1}

  Where:

  T = minimum insulation thickness (inches). r = actual outside radius of pipe (inches). t = insulation thickness listed in this table for applicable fluid temperature and pipe size. K = conductivity of alternate material at mean rating temperature indicated for the applicable fluid temperature [Btu•in/(h•ft [2] - °F)] [W/(m•K)]. k = the upper value of the conductivity range listed in this table for the applicable fluid temperature. 2 These thicknesses are on energy efficiency considerations only. Additional insulation is sometimes required relative to safety issues/surface temperature. 3 For piping smaller than 1 1 ⁄ 2 inches (40 mm) or less and located in partitions within conditioned spaces, reduction of these thicknesses by 1 inch (25.4 mm) shall be permitted (before thickness adjustment required in footnote 1) but not to thicknesses below 1 inch (25.4 mm). 4 For direct-buried heating and hot water system piping, reduction of these thicknesses by 1 1 ⁄ 2 inch (40 mm) shall be permitted (before thickness adjustment required in footnote 1) but not to thicknesses below 1 inch (25.4 mm). 5 Table E 503.7.3(1) is based on steel pipe. Nonmetallic pipes schedule 80 thickness or less shall use the table values. For other nonmetallic pipes having thermal resistance more than that of steel pipe, reduced insulation thicknesses are permitted where documentation is provided showing that the pipe with the proposed insulation has no more heat transfer per foot (mm) than a steel pipe of the same size with the insulation thickness shown in Table E 503.7.3(1).

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

  APPENDIX E

  TABLE E 503.7.3(2) MINIMUM PIPE INSULATION THICKNESS FOR COOLING SYSTEMS (CHILLED WATER, BRINE, AND REFRIGERANT) [1,2,3,4 ]

  [ASHRAE 90.1: TABLE 6.8.3-2]

• CMC § 1.1.10 Medium relevance — show source text

  1.1.10 Availability of Codes. At least one complete copy each of Titles 8, 19, 20, 24, and 25 with all revisions shall be main- 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 Mechanical Code by reference on a chapter-by-chapter basis. When a specific chapter of the Uniform Mechanical Code is not printed in the code and is marked “Reserved”, such chapter of the Uniform Mechanical Code is not adopted as a portion of this code. When a specific chapter of the Uniform Mechanical 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 sections within a chapter are applicable to buildings under the authority of a specific state agency, but they are not to be considered 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), including buildings constructed by the Trustees of the California 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 Cited – Health and Safety Code Section 18934.5.

  2025 CALIFORNIA MECHANICAL CODE 5

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

  DIVISION I CALIFORNIA ADMINISTRATION

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

  (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 Cali- fornia, 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.

• CMC § 1.10.1.3 Medium relevance — show source text

  1.10.1.3 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this Subsection 1.10.1 will be identified in the Matrix Adop- tion Tables under the acronym OSHPD 1, and OSHPD 1R.

  1.10.2 OSHPD 2. Specific scope of application of the agency responsible for enforcement, enforcement agency, specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

  OSHPD 2

  – Application Skilled nursing facilities and intermediate care facility buildings.

  Enforcing Agency – Health Care Access and Informa- tion/Office of Statewide Hospital Planning and Devel-

  opment (OSHPD). The office shall also enforce the Divi- sion of the State Architect access compliance regulations and the regulations of the Office of the State Fire Marshal for the above stated facility type.

  1.10.2.1 Applicable Administrative Standards:

  (1) Title 24, Part 1, California Code of Regulations: Chapter 7.

  (2) Title 24, Part 2, California Code of Regulations: Sections 1.1.0 and 1.10.0, Chapter 1, Division I, and as indicated in the adoption matrix for Chapter 1, Division II.

  1.10.2.2 Applicable Building Standards. California Building Standards Code, Title 24, Parts 2, 3, 4, 5, 6, 9, 10, and 11.

  – Authority Cited Health and Safety Code Sections 127010, 127015, 1275, and 129850.

  – References Health and Safety Code Sections 127010, 127015, 1275, and 129680.

  1.10.2.3 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this Subsection 1.10.2 will be identified in the Matrix Adop- tion Tables under the acronym OSHPD 2.

  1.10.3 OSHPD 3. Specific scope of application of the agency responsible for enforcement, enforcement agency, specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

  OSHPD 3

  – Application Licensed clinics and any freestanding building under a hospital license where outpatient clin- ical services are provided.

  – Enforcing Agency Local building department.

  1.10.3.1 Applicable Administrative Standards.

  (1) Title 24, Part 1, California Code of Regulations: Chapter 7.

  (2) Title 24, Part 2, California Code of Regulations: Sections 1.1.0 and 1.10.0, Chapter 1, Division I, and as indicated in the adoption matrix for Chapter 1, Division II.

  1.10.3.2 Applicable Building Standards. California Building Standards Code, Title 24, Parts 2, 3, 4, 5, 6, 9, 10, and 11.

• CMC § 2021-2022 High relevance — show source text

  1 This updated ADU Handbook references the law as amended by recent legislation that goes into effect on January 1, 2025.

  4

  In light of changing laws around ADUs and the growing importance of this housing type, HCD has updated this ADU Handbook and continues to be committed to facilitating housing production at all income levels.

  5

  The California Department of Housing and Community Development

  With the vision that one day, every California resident can live, work, and play in healthy communities of opportunity, it is the mission of HCD to provide safe, affordable homes and vibrant, inclusive, sustainable communities for all Californians. HCD accomplishes this by increasing and preserving the supply of affordable places to live in California and by creating effective solutions to the housing crisis through policy and research.

  Housing Accountability Unit California’s housing crisis has reached historic proportions despite the passage of numerous laws intended to increase the supply of housing affordable to Californians at all income levels. As part of the 2021-2022 state budget, HCD received additional staff to grow its accountability efforts and formed the Housing Accountability Unit (HAU). While education and technical assistance are always the first step in HCD’s accountability efforts, the HAU holds jurisdictions accountable for meeting their housing element commitments and complying with state housing laws. Violations of state housing laws, including State ADU Law, may lead to consequences, including revocation of housing element certification and referral to the California Office of the Attorney General.

  Technical Assistance There may be uncertainty, or a need for education at the local level about how to comply with state law, especially as state laws evolve. HCD provides technical assistance to property owners and developers who are seeking to create ADUs, as well as to advocates, local agencies, and other interested parties.

  Any questions regarding the application of State ADU Law may be submitted to HCD via the online ADU Portal. Please provide as much detail as possible in the online form. HCD may request additional information, including, but not limited to denials and communications from the local agency.

  Local agencies seeking assistance or submitting an ADU ordinance to HCD, must also use the online portal.

  For those experiencing technical issues with the ADU Portal, please email: ADUPortal@hcd.ca.gov.

  Questions beyond what this Handbook provides are encouraged to contact their local permitting agency (e.g., city or county) or private attorney.

  Enforcement of State ADU Law Since 2016, HCD has had statutory authority to review local agencies’ ADU ordinances, and as of January 1, 2024, HCD also has the authority to enforce all State ADU Laws. HCD’s ADU team reviews local ordinances for compliance with State ADU Law and sends

  6

  findings letters and, when necessary, may escalate its enforcement. To ensure consistency, the HAU works closely with other HCD divisions.

  The ADU team is committed to supporting the public, local agencies, and partner agencies with understanding and complying with State ADU Law.

  7

  Glossary

  66323 Units One of the four delineated types of ADUs (and JADUs) that must be permitted pursuant to Government Code section 66323. Source: Government Code section 66323

• CMC § 18934.7. High 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.

• CMC § 1.5 High 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 University – Building 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 Agency – State or local agency specified by the applicable provisions of law.

  Authority Cited – Government Code Section 16600.

  References – Government Code Sections 16600 through 16604.

  4. Unreinforced Masonry Bearing Wall Buildings.

  Application – Minimum 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 Agency – State or local agency specified by 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 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.

  Application – All occupancies where no other state agency has the authority to adopt green building stan- dards 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, 18938 and 18940.5.

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

  2. Graywater Systems for Nonresidential Occupancies.

• CMC § 1.8.3 High relevance — show source text

  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 regu- lations promulgated by the Department of Housing and Community Development pertaining to the installation, erection, construction, reconstruction, movement, enlargement, conversion, alteration, repair, removal, demolition, or arrangement of apartments, condo- miniums, hotels, motels, lodging houses, and dwellings, including accessory buildings, facilities, and uses thereto.

  The provisions regulating the erection and construc- tion 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, mainte- nance, 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 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.

  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,

  8 2025 CALIFORNIA MECHANICAL CODE

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

  DIVISION I CALIFORNIA ADMINISTRATION

  Division 1, Chapter 1, Subchapter 1, commencing with Section 1, for the erection, construction, recon- struction, movement, enlargement, conversion, alter- ation, 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 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.

• CMC § 1.2.1.2 High relevance — show source text

  1.2.1.2 Enforcement. [CSU, UC, Judicial Council & California Department of Corrections and Rehabilita- tion] 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 Occu- pancies.

  Application – All occupancies where no other state agency has the authority to adopt green building stan- dards 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, 18938 and 18940.5.

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

  (2) Graywater Systems for Nonresidential Occupancies.

  Application – The construction, installation, and alter- ation of graywater systems for indoor and outdoor uses in nonresidential occupancies.

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

  Authority Cited – Health & Safety Code Section 18941.8.

  Reference – Health & Safety Code Section 18941.8.

  1.2.3 Alternative Materials, Design, and Methods of Construction and Equipment. The provisions of this code are not intended to prevent the installation of any material or to prohibit any design or method of construction not specifically prescribed by this code, provided that any such alternative has been approved. An alternative material, design, or method of construction shall be approved where the building official finds that the proposed design is satisfactory and complies with the intent of the provisions of this code, and that the material, method or work offered is, for the purpose intended, at least the equivalent of that prescribed in this code in quality, strength, effectiveness, fire resistance, durability and safety.

  1.2.3.1 Research Reports. Supporting data, where neces- sary to assist in the approval of materials or assemblies not specifically provided for in this code, shall consist of valid research reports from approved sources.

  _**1.2.3.2 Tests.