Title 24 · California Energy Code
How does a local jurisdiction adopt more-stringent energy measures (filing and approval process)?
You can’t enforce local changes that make the Energy Code stricter until the California Energy Commission has reviewed and made the required finding under Title 24 Part 1 § 10‑106, and the local ordinance plus express findings are filed and accepted by the California Building Standards Commission under § 101.7; see §§ A4.201.1, A5.201.1 and § 100.0(g) for the governing rules.
Last reviewed: July 6, 2026
What the code requires — 2–4 sentences
Local governments that want to make voluntary Part 6 (Energy Code) measures mandatory or otherwise adopt more-stringent energy standards must obtain the California Energy Commission finding/approval under § 10‑106 (Title 24, Part 1) before they can enforce those standards. After the Energy Commission makes the required finding, the jurisdiction must file its ordinance together with its express findings and receive acceptance from the California Building Standards Commission under § 101.7 / § 101.7.1 before enforcement. These two steps are specified in the voluntary-energy appendices for residential and nonresidential measures — § A4.201.1 and § A5.201.1 — and the administrative backstop for locally adopted energy standards appears in § 100.0(g).
The single most important rule: you cannot enforce a local energy standard that amends Part 6 until the California Energy Commission has made the required findings under Title 24, Part 1 § 10‑106 and the local ordinance and findings have been filed/accepted under § 101.7.
Requirements in detail
Primary required steps (high level)
- Make express findings that the amendment/addition/deletion is needed for local climatic, topographical, or geological conditions (or other local environmental conditions as the jurisdiction defines them). § 101.7.1 requires those findings and filing to the CBSC.
- Obtain the California Energy Commission (CEC) finding/approval under the process of Title 24, Part 1 § 10‑106 before enforcement of any locally adopted energy standard that changes Part 6. § A4.201.1 and § A5.201.1 state this requirement for the voluntary energy appendices.
- After the CEC finding, file the ordinance and findings with the California Building Standards Commission (CBSC) as expressly marked local modifications and receive the CBSC’s acceptance per § 101.7. The effective date of local amendments filed under § 101.7.1 is the date filed, though not earlier than the effective date of that edition of the code.
Decision‑relevant dimensions (summary table)
| Decision dimension | Value / action required | Code reference |
|---|---|---|
| Who must review/approve the energy change before enforcement | California Energy Commission must make the required findings under Title 24, Part 1 § 10‑106 | § A4.201.1; § A5.201.1 — |
| What must the jurisdiction prepare | Express findings tying the modification to local climatic/topographical/geological (or local environmental) conditions; an ordinance expressly marking local modifications | § 101.7.1; § 101.7 — |
| Where to file after CEC finding | File ordinance + findings with the California Building Standards Commission (CBSC) | § 101.7.1 — |
| Administrative rules that govern the overall process | Administrative requirements (permit reqs, enforcement by Commission, locally adopted energy standards, interpretations, appeals, approved calculation methods, etc.) are specified in Title 24, Part 6 § 100.0(g) and Part 1 §§ 10‑101—10‑114 | § 100.0(g) — |
| When local amendment becomes effective | The effective date is the filing date with CBSC (but not earlier than the code’s effective date); must have completed CEC step first | § 101.7.1; related effective-date text — |
| Examples of measures referenced in voluntary appendices | Residential LSC margins (Table A4.203.1.1) and nonresidential Tier measures — useful if adopting Appendix A measures as mandatory | § A4.203.1.1 Table A4.203.1.1; § A5.203.1 — |
What the CEC review covers (from the code)
- The CEC must find that the proposed local standard will not make buildings consume more energy than allowed by Part 6 and will be consistent with statutory authority (Public Resources Code references in the code). Local standards may adopt Part 6 early, require additional conservation measures, or set more stringent energy budgets — but the CEC must make the finding before enforcement.
Exceptions & special cases
- A jurisdiction may adopt voluntary Appendix measures (Appendix A4 residential or A5 nonresidential) but, if it makes them mandatory locally, the jurisdiction still must obtain the CEC finding under § 10‑106 and file ordinances with the CBSC per § 101.7 prior to enforcement. Adoption as mandatory does not bypass the CEC/CBSC steps.
- The code notes that the general local‑modification rules are subject to the Health & Safety Code provisions that govern state/local adoption processes (citations shown in the code). Where other state agencies have authority (HCD, DSA, etc.) those adoption rules may add steps — review the relevant agency adoption matrix in the code.
Common mistakes
- Assuming a local ordinance that is more stringent is enforceable immediately. (Wrong: CEC finding under § 10‑106 + CBSC filing/acceptance required first.) § A4.201.1 / § A5.201.1 make this explicit.
- Failing to make or publish express findings that tie the change to local climatic/topographical/geological conditions as required by § 101.7.1. Without clear findings you risk CBSC rejection or challenge.
- Forgetting the administrative scope in § 100.0(g) — permit requirements, appeals, approved calculation methods and enforcement actions are governed by Part 1 administrative sections; those processes matter for implementation and compliance.
Worked example — concrete scenario with numbers
Scenario: "Green Valley" (a coastal city in Climate Zone 2) wants to require newly constructed low‑rise homes to meet the Appendix A4 LSC target used for exemplary performance.
The city adopts an ordinance that makes Appendix A4 residential energy measures mandatory for new low‑rise homes, and in the ordinance cites the LSC compliance margin recommended for Climate Zone 2: 1.62 (from Table A4.203.1.1). That numeric margin is drawn from Appendix A4.
The city prepares its express findings explaining why the higher LSC margin is reasonably necessary given local conditions (coastal microclimate, local grid constraints, etc.) per § 101.7.1 and marks each amendment to cross‑reference those findings.
Before the city puts the ordinance into force it files the required application to the California Energy Commission under Title 24, Part 1 § 10‑106 so the CEC can make the required findings that the local change is consistent with the Energy Code process and will not increase building energy consumption beyond Part 6 allowances. (A4 and A5 explicitly require this CEC step prior to enforcement.)
After the CEC issues the required finding, the city files the ordinance and findings with the California Building Standards Commission per § 101.7, marking the ordinance as a local modification. Only then may the city enforce the new LSC margin requirement. The ordinance effective date is the filing date with CBSC (subject to the code’s effective‑date constraints).
(Notes: the code materials available here give these required steps and the LSC margins from Appendix A4. They do not provide internal CEC review timelines or forms — consult the CEC Title 24 Part 1 § 10‑106 process and CEC guidance for procedural timing and application forms.)
Related provisions
- § A4.201.1 — Scope and requirements for adopting Appendix A4 measures as mandatory (residential).
- § A5.201.1 — Scope and requirements for adopting Appendix A5 measures as mandatory (nonresidential).
- § 100.0(g) — Administrative requirements: enforcement by CEC, locally adopted energy standards, appeals and related administrative rules (pointing to Part 1 §§ 10‑101—10‑114).
- § 101.7 / § 101.7.1 — Findings and filings for local amendments; filing ordinances and findings with CBSC and effective‑date rules.
Code references
Grounded in the retrieved California Energy Code — click a citation to read the verbatim passage:
§ 201.1 High relevance — show source text
SECTION A4.201—GENERAL
A4.201.1 Scope. For the purposes of mandatory energy efficiency standards in the California Building Standards Code (Title 24), the California Energy Commission will continue to adopt mandatory standards in the California Energy Code (Title 24, Part 6). It is the intent of these voluntary provisions to encourage local jurisdictions through codification to achieve exemplary performance in the area of building energy efficiency. Local jurisdictions adopting these voluntary provisions as mandatory local energy efficiency standards shall submit the required application and receive the required approval of the California Energy Commission in compliance with Title 24, Part 1, Section 10-106 prior to enforcement. Once the required filing has been verified and finding has been made by the Energy Commission, local jurisdictions shall file an ordinance expressly marking the local modification along with findings and receive the required acceptance from the California Building Standards Commission in compliance with Section 101.7 of this code, prior to enforcement. (Title 24, Part 1, Section 10-106 is available at https://www.energy.ca.gov/programs-and-topics/programs/build- ing-energy-efficiency-standards/2025-building-energy-efficiency
SECTION A4.202—DEFINITIONS
A4.202.1 Definitions. The following terms are defined in Chapter 2.
ENERGY BUDGET.
LONG-TERM SYSTEM COST (LSC).
RECOVERED ENERGY, ON-SITE.
SOLAR POOL HEATING SYSTEM.
SECTION A4.203—PERFORMANCE APPROACH FOR NEWLY CONSTRUCTED BUILDINGS
A4.203.1 Energy efficiency. Newly constructed low-rise residential buildings shall comply with Sections A4.203.1.1 through A4.203.1.4.
A4.203.1.1 Long-term system cost (LSC). LSC rating for the building’s Proposed Design shall be computed by Compliance Software certified by the Energy Commission as specified in Title 24, Part 6, Section 100.1 and 150.1(b), and shall reduce the LSC required in the Compliance Software for minimum performance-based compliance with the California Energy Code by the compliance margin specified in Table A4.203.1.1. The rating shall be included in the Certificate of Compliance documentation.
TABLE A4.203.1.1—RECOMMENDED LSC MARGINS BY CLIMATE ZONES Col2 CALIFORNIA ENERGY CODE CLIMATE ZONE TOTAL LSC COMPLIANCE MARGIN 1 2.70 2 1.62 3 1.10 4 1.11 5 1.01 6 0.24 7 0.24 8 0.21 9 0.20 10 0.18 11 1.11 12 1.05 13 0.96 14 1.21 15 0.59 16 1.68 Note: Community shared options complying with Title 24, Part 1, Section 10-115 may be used to achieve LSC targets. Note: Community shared options complying with Title 24, Part 1, Section 10-115 may be used to achieve LSC targets. 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A4-9
§ 201.1 High relevance — show source text
APPENDIX A5-12 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE
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A5 NONRESIDENTIAL VOLUNTARY MEASURES
DIVISION A5.2 – ENERGY EFFICIENCY
SECTION A5.201—GENERAL
A5.201.1 Scope. For the purposes of mandatory energy efficiency standards in this code, the California Energy Commission will continue to adopt mandatory standards. It is the intent of these voluntary provisions to encourage local jurisdictions through codification to achieve exemplary performance in the area of building energy efficiency. Local jurisdictions adopting these voluntary provisions as mandatory local energy efficiency standards shall submit the required application and receive the required findings of the California Energy Commission in compliance with Title 24, Part 1, Section 10-106, prior to enforcement. Once the required filing has been verified and finding has been made by the Energy Commission, local jurisdictions shall file an ordinance expressly marking the local modifications along with findings and receive the required acceptance from the California Building Standards Commission in compliance with Section 101.7 of this code, prior to enforcement (Title 24, Part 1, Section 10-106 is available at https://www.energy.ca.gov/programs-and-topics/programs/building-energy-efficiency-standards/2025-building-energy-efficiency
SECTION A5.202—DEFINITIONS
A5.202.1 Definitions. The following terms are defined in Chapter 2.
ENERGY BUDGET.
GEOTHERMAL.
LONG-TERM SYSTEM COST (LSC).
PROCESS.
RECOVERED ENERGY, ON-SITE.
SOLAR ACCESS.
SOLAR POOL HEATING SYSTEM.
SECTION A5.203—PERFORMANCE APPROACH
A5.203.1 Energy efficiency. Nonresidential, high-rise residential and hotel/motel buildings that include lighting and/or mechanical systems shall comply with Sections A5.203.1.1 and A5.203.1.2. Newly constructed buildings and additions are included in the scope of these sections. Buildings permitted without lighting or mechanical systems shall comply with Section A5.203.1.1 but are not required to comply with Section A5.203.1.2.
A5.203.1.1 Tier 1 and Tier 2 prerequisites. To comply with Tier 1, ONE of the following efficiency measures is required for all applicable components of the building project. To comply with Tier 2, TWO of the following efficiency measures are required.
A5.203.1.1.1 Outdoor lighting. Outdoor lighting requirements are described below.
A5.203.1.1.1.1 Newly installed outdoor lighting power shall be no greater than 90 percent of the Allowed Outdoor Lighting Power, and general hardscape lighting within the scope of Title 24, Part 6, Section 140.7(b)1 shall have a color temperature no higher than 3000K. The Allowed Outdoor Lighting Power calculation is specified in Title 24, Part 6, Section 140.7, Requirements for Outdoor Lighting.
Exception to Section A5.203.1.1.1.1:
§ 18941.5 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
Local modifications shall comply with Health and Safety Code Section 18941.5 for Building Standards Law, Health and Safety Code Section 17958 for State Housing Law or Health and Safety Code Section 13869.7 for Fire Protection Districts.
1.1.8.1 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 geo- logical conditions.
Exception: Hazardous building ordinances and pro- grams mitigating unreinforced masonry buildings.
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 depart- ments shall file the amendments, additions or dele- tions, 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, Division of Codes and Standards, P.O. Box 278180, Sacra- mento, CA 95827-8180 or 9342 Tech Center Drive, Suite 500, Sacramento, CA 95826-2582.
1.1.8.2 California Energy Code Requirements for Locally Adopted Energy Standards. In addition to the provisions of Section 1.1.8.1 of this part, local jurisdic- tions that adopt changes to energy conservation or insu- lation standards (including energy efficiency measures) may not enforce such changes until the California Energy Commission has made the findings required by Public Resources Code Section 25402.1(h)(2), following the process specified in Section 10-106 of the California Administrative Code.
1.1.9 Effective Date of this Code. Only those standards approved by the California Building Standards Commission that are effective at the time an application for building per- mit is submitted shall apply to the plans and specifications for, and to the construction performed under, that permit. For the effective dates of the provisions contained in this code, see the History Note page of this code.
Exceptions:
(1) [HCD 1 & HCD 2] Retroactive permits issued in accor- dance with Health and Safety Code Section 17958.12.
(2) [HCD 1 & HCD 2] Plans approved by the Department of Housing and Community Development or a Depart- ment-approved design approval agency for factory-built housing as defined by Health and Safety Code Section 19971. Approved plans, pursuant to the California Code of Regulations, Title 25, Division 1, Chapter 3, Sub- chapter 1, Article 3, Section 3037 remain valid for a period of 36 months from the date of plan approval.
§ 201.1 High relevance — show source text
DIVISION A5.2 – ENERGY EFFICIENCY
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
Adopting agency BSC BSC-
CGSFM HCD Col6 Col7 DSA Col9 OSHPD Col11 Col12 Col13 Col14 Col15 BSCC DPH AGR DWR CEC CA SL SLC Adopting agency BSC BSC-
CGSFM 1 2 1/AC AC SS 1 1R 2 3 4 5 5 5 5 5 5 5 5 5 Adopt entire CA chapter Adopt entire chapter as
amended (amended
sections listed below)Adopt only those sections that
are listed belowX Chapter/Section Appendix A5.2 X 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-11
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APPENDIX A5-12 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE
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A5 NONRESIDENTIAL VOLUNTARY MEASURES
DIVISION A5.2 – ENERGY EFFICIENCY
SECTION A5.201—GENERAL
A5.201.1 Scope. For the purposes of mandatory energy efficiency standards in this code, the California Energy Commission will continue to adopt mandatory standards. It is the intent of these voluntary provisions to encourage local jurisdictions through codification to achieve exemplary performance in the area of building energy efficiency. Local jurisdictions adopting these voluntary provisions as mandatory local energy efficiency standards shall submit the required application and receive the required findings of the California Energy Commission in compliance with Title 24, Part 1, Section 10-106, prior to enforcement. Once the required filing has been verified and finding has been made by the Energy Commission, local jurisdictions shall file an ordinance expressly marking the local modifications along with findings and receive the required acceptance from the California Building Standards Commission in compliance with Section 101.7 of this code, prior to enforcement (Title 24, Part 1, Section 10-106 is available at https://www.energy.ca.gov/programs-and-topics/programs/building-energy-efficiency-standards/2025-building-energy-efficiency
SECTION A5.202—DEFINITIONS
A5.202.1 Definitions. The following terms are defined in Chapter 2.
ENERGY BUDGET.
GEOTHERMAL.
§ 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.
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.
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.
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.
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.
- Section 1.2.3 in the California Building Code (CBC) for the California Building Standards Commission.
- Section 104.2.3 in the California Building Code (CBC) for the Division of the State Architect.
§ 18941.5 Medium relevance — show source text
Local modifications shall comply with Health and Safety Code Section 18941.5 for Building Standards Law, Health and Safety Code Section 17958 for State Housing Law or Health and Safety Code Section 13869.7 for Fire Protection Districts.
1.1.8.1 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.
Exception: Hazardous building ordinances and programs mitigating unreinforced masonry build- ings.
(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 depart- ments shall file the amendments, additions, or dele- tions, 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, Division of Codes and Standards, P.O. Box 278180, Sacra- mento, CA 95827-8180 or 9342 Tech Center Drive, Suite 500, Sacramento, CA, 95826-2582.
1.1.8.2 California Energy Code Requirements for Locally Adopted Energy Standards. In addition to the provisions of Section 1.1.8.1 of this part, local jurisdic- tions that adopt changes to energy conservation or insu- lation standards (including energy efficiency measures) may not enforce such changes until the California Energy Commission has made the findings required by Public Resources Code Section 25402.1(h)(2), following the process specified in Section 10-106 of the California Administrative Code.
1.1.9 Effective Date of This Code. Only those standards approved by the California Building Standards Commission that are effective at the time an application for building permit is submitted shall apply to the plans and specifications for, and to the construction performed under, that permit. For the effective dates of the provisions contained in this code, see the History Note page of this code.
Exceptions: (1) [HCD 1 & HCD 2] Retroactive permits issued in accor- dance with Health and Safety Code Section 17958.12.
(2) [HCD 1 & HCD 2] Plans approved by the Department of Housing and Community Development or a Department- approved design approval agency for factory-built housing as defined by Health and Safety Code Section 19971. Approved plans, pursuant to the California Code of Regu- lations, Title 25, Division 1, Chapter 3, Subchapter 1, Article 3, Section 3037 remain valid for a period of 36 months from the date of plan approval.
§ 5.5 Medium relevance — show source text
This document describes metering requirements and interconnecting methods on existing service equipment for renewable electrical generation facilities enrolled in the Virtual Net Energy Metering (NEMV/VNEM) program. NEMV installations requires a VNEM meter that only measures the generation produced and must not be tied into any of the individual tenant or common use meters on the premise. The totalized amount of generation registered on the VNEM meter will be shared, through the PG&E billing process, by all tenants at the site.
General Information
Developers must contact PG&E’s Electric Generation Interconnection (EGI) department and submit all applicable documents for approval before starting any installation.
Submit single line, elevation drawings and detailed pictures showing the point of interconnection. The NEMV point of interconnection will require prior review and approval from all appropriate PG&E departments before any connections can be made.
All installations and equipment must be approved by PG&E and approved by the local (city/county) inspection agency or the Authority Having Jurisdiction (AHJ) before any VNEM meter is set by PG&E.
For any NEMV installation that requires a service disconnect/reconnect, developers must coordinate with the EGI department to request for a local PG&E inspector and metering department to inspect and approve all line side connections before reconnecting service.
Developers must install UL approved service equipment with provisions for making generation interconnections that are not in any PG&E sealed sections and ahead of all tenant/house meters
Specific Requirements
Applicants will provide, own, and install all equipment except for the PG&E VNEM meter and metering equipment (i.e. current transformers, test switch).
VNEM panels must have test bypass facilities and meet the requirements in Section 5 and 7 of the latest Greenbook.
VNEM panels greater than 200A must meet Greenbook requirements in Section 5, 9 and 10.
VNEM meter height, working space and gas clearances must be maintained as specified in Section 2 and 5 of the Greenbook.
Applicants will pull and connect generation conductors into the panel. Generation conductors in the panel must be clearly labeled “VNEM” at the point of interconnection for PG&E field personnel to identify.
VNEM meter panels must have the generation connected to the LOAD side and the utility grid on the LINE side of the VNEM panel. The PG&E VNEM meter will register in reverse when the generating system is producing.
VNEM meter panels must have proper marking and identification (i.e. apartment number, street number, use, or location). See PG&E Greenbook Section 5.5, “Meter Identification and Seals”.
Rev. #01: 03−25−22 076249 Page 1 of 7
Greenbook Virtual Net Energy Metering Installations
Point of Connection
- For underground service multi-meter panels, an acceptable point of connection is,
A Inside the main switch section, see Figure 1, with approval from the local AHJ, or
B Install a sealable PG&E approved termination enclosure, see Figure 2. Refer to Document 058817, Terminating Underground Electric Services 0−600 Volts in Customer-Owned Facilities, for termination enclosure specifications and requirements.
- For overhead service multi−meter panels, an acceptable point of connection is,
§ 106.8.2.2 Medium relevance — show source text
Exception: Areas of parking facilities served by parking lifts, including but not limited to automated mechanicalaccess open parking garages as defined in the California Building Code ; or parking facilities otherwise incapable of supporting electric vehicle charging.
A4.106.8.2.2 Technical requirements. The EV spaces required by Section A4.106.8.2 shall be designed and constructed in accordance with Sections 4.106.4.2, 4.106.4.2.2.1.1, 4.106.4.2.2.1.2, and 4.106.4.2.5.
SECTION A4.107 (RESERVED)
SECTION A4.108 —INNOVATIVE CONCEPTS AND LOCAL ENVIRONMENTAL CONDITIONS
A4.108.1 Innovative concepts and local environmental conditions. 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. This code does not limit the authority of city, county, or city and county government to make necessary changes to the provisions contained in this code pursuant to Section 101.7.1.
2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A4-7
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APPENDIX A4-8 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE
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A4 RESIDENTIAL VOLUNTARY MEASURES
DIVISION A4.2 – ENERGY EFFICIENCY
SECTION A4.201—GENERAL
A4.201.1 Scope. For the purposes of mandatory energy efficiency standards in the California Building Standards Code (Title 24), the California Energy Commission will continue to adopt mandatory standards in the California Energy Code (Title 24, Part 6). It is the intent of these voluntary provisions to encourage local jurisdictions through codification to achieve exemplary performance in the area of building energy efficiency. Local jurisdictions adopting these voluntary provisions as mandatory local energy efficiency standards shall submit the required application and receive the required approval of the California Energy Commission in compliance with Title 24, Part 1, Section 10-106 prior to enforcement. Once the required filing has been verified and finding has been made by the Energy Commission, local jurisdictions shall file an ordinance expressly marking the local modification along with findings and receive the required acceptance from the California Building Standards Commission in compliance with Section 101.7 of this code, prior to enforcement. (Title 24, Part 1, Section 10-106 is available at https://www.energy.ca.gov/programs-and-topics/programs/build- ing-energy-efficiency-standards/2025-building-energy-efficiency
SECTION A4.202—DEFINITIONS
A4.202.1 Definitions. The following terms are defined in Chapter 2.
ENERGY BUDGET.
LONG-TERM SYSTEM COST (LSC).
RECOVERED ENERGY, ON-SITE.
SOLAR POOL HEATING SYSTEM.
SECTION A4.203—PERFORMANCE APPROACH FOR NEWLY CONSTRUCTED BUILDINGS
§ 25402.1 Medium relevance — show source text
- 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.
- Section 1.2.3 in the California Building Code (CBC) for the California Building Standards Commission.
- Section 104.2.3 in the California Building Code (CBC) for the Division of the State Architect.
- Section 1.8.7 in the California Building Code (CBC); and Section 1.8.7 in the California Residential Code (CRC) for the Department of Housing and Community Development.
- Section 7-104 in the California Administrative Code for the Office of the Statewide Health Planning and Development.
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ADMINISTRATION
101.9 Effective date of this code. Only those standards approved by the California Building Standards Commission that are effective at the time an application for a building permit is submitted shall apply to the plans and specifications for, and to the construction performed under, that permit. For the effective dates of the provisions contained in this code, see the appropriate application checklist and the History Note page of this code.
101.10 Mandatory requirements. This code contains both mandatory and voluntary green building measures. Mandatory and voluntary measures are identified in the appropriate application checklist contained in this code.
101.11 Effective use of this code. The following steps shall be used to establish which provisions of this code are applicable to a specific occupancy:
- Establish the type of occupancy.
- Verify which state agency has authority for the established occupancy by reviewing the authorities list in Sections 103 through 106.
- 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 mandatory 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.
§ 108.1 Medium relevance — show source text
108.1** Items in this section are necessary to address innovative
concepts or local environmental conditions.||||||| |Item 1|
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| |Item 3||||||| |ENERGY EFFICIENCY||||||| |General||||||| |4.201.1 Building meets or exceeds the requirements of the_California_
_Building Energy Efficiency Standards_3.||2|2|||| |Performance Approach for Newly
Constructed Buildings||||||| |**A4.203.1.1 Hourly Source Energy Rating (EDR1).**EDR1 ratings for
building design shall be computed by Energy Compliant software and
shall reduce the EDR1 required by the software by the compliance
margins specified in Table A4.203.1.1.||2|2|||| |**A4.203.1.2 Prerequisite options.In addition, a minimum of two of
the efficiency measures specified in Sections A4.203.1.2.1 through
A4.203.1.2.8 will be required to be met.
· Roof Deck Insulation or Ducts in Conditioned Space.
· High-performance Walls.
· Compact Hot Water Distribution System.
· Drain Water Heat Recovery.
· High Performance Vertical Fenestration.
· Heat Pump Water Heater Demand Management.
· Battery Storage System Controls.
· **Heat Pump Space and Water Heating.||2|2|||| |**A4.203.1.3 Consultation with local electric service provider.**Local
jurisdictions considering adoption of reduced EDR targets based on
using solar photovoltaic (PV) systems larger than required by the
California Energy Code shall consult with the local electric service
provider to ensure that that PV system sizing required to comply with
the EDR targets will be acceptable to the local electric service
provider.||2|2||||2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A4-25
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
APPENDIX A4 — RESIDENTIAL VOLUNTARY MEASURES
SECTION A4.602—RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST—continued
§ 304.1 Medium relevance — show source text
SECTION 304—VOLUNTARY TIERS
304.1 Purpose. Voluntary tiers are intended to further encourage building practices that improve public health, safety and general welfare by promoting the use of building concepts which minimize the building’s impact on the environment and promote a more sustainable design.
304.1.1 Tiers. The provisions of Divisions A4.6 and A5.6 outline means, in the form of voluntary tiers, for achieving enhanced construction levels by incorporating additional measures for residential and nonresidential new construction. Voluntary tiers may be adopted by local governments and, when adopted, enforced by local enforcing agencies. Buildings complying with tiers specified for each occupancy contain additional prerequisite and elective green building measures necessary to meet the threshold of each tier. See Section 101.7 of this code for procedures and requirements related to local amendments, additions or deletions, including changes to energy standards.
[BSC & HCD] Where there are practical difficulties involved in complying with the threshold levels of a tier, the enforcing agency may grant modifications for individual cases. The enforcing agency shall first find that a special individual reason makes the strict letter of the tier impractical and that modification is in conformance with the intent and purpose of the measure. The details of any action granting modification shall be recorded and entered in the files of the enforcing agency.
SECTION 305 [OSHPD 1]— CALGreen TIER 1 AND CALGreen TIER 2
305.1 CALGreen Tier 1 and CALGreen Tier 2 buildings contain voluntary green building measures necessary to meet the threshold of each level.
305.1.1 CALGreen Tier 1. To achieve CALGreen Tier 1, buildings must comply with the latest edition of “Savings By Design, Healthcare Modeling Procedures” found online at http://www.energysoft.com/main/page_ downloads_ sbd_healthcare.html.
305.1.2 CALGreen Tier 2. To achieve CALGreen Tier 2, buildings must exceed the latest edition of “Savings By Design, Healthcare Modeling Procedures” by a minimum of 15 percent.
SECTION 306 [DSA-SS]—VOLUNTARY MEASURES
306.1 Purpose. For public schools and community colleges, voluntary measures further encourage building practices that improve public health, safety and general welfare by promoting the use of building concepts which minimize the building’s impact on the environment and promote a more sustainable design.
306.1.1 Appendix A5, Divisions A5.1 through A5.5, outline means of achieving enhanced sustainable design and construction by incorporating voluntary measures that exceed the mandatory measures.
306.1.2 Chapter 5 Nonresidential Mandatory Measures that are not adopted as mandatory measures by DSA-SS are voluntary measures recommended and encouraged for the design, construction, verification and maintenance of non-energy systems.
Note: The building commissioning requirements for energy efficiency specified in the California Energy Code are required.
3-4 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
CALIFORNIA GREEN BUILDING STANDARDS CODE – MATRIX ADOPTION TABLE
CHAPTER 4 – RESIDENTIAL MANDATORY MEASURES
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
§ 101.7 Medium relevance — show source text
As specified in Section 101.7, additional prerequisite measures may be included by the enforcing agency to address specific local environmental conditions and may be listed in the Innovative Concepts and Local Environmental Conditions portions of the checklist.
A4.601.3 Elective measures. In addition to the required measures, Tier 1 and Tier 2 buildings must incorporate at least the number of elective measures specified in Sections A4.601.4.2 and A4.601.5.2.
A4.601.4 Tier 1. To achieve Tier 1 status a project must comply with the following:
A4.601.4.1 Mandatory measures for Tier 1. The project shall meet or exceed all of the mandatory measures in Chapter 4, Divisions 4.1 through 4.5 and Chapter 7 as applicable.
A4.601.4.2 Prerequisite and elective measures for Tier 1. In addition to the mandatory measures, compliance with the following prerequisite and elective measures from Appendix A4 is also required to achieve Tier 1 status:
From Division A4.1, Planning and Design. 1.1. Comply with the topsoil protection requirements in Section A4.106.2.3. 1.2. Comply with the 20 percent permeable paving requirements in Section A4.106.4. 1.3. Comply with the cool roof requirements in Section A4.106.5. 1.4. Comply with the Tier 1 electric vehicle (EV) charging requirements in Section A4.106.8. 1.5. Comply with at least two elective measures selected from Division A4.1.
From Division A4.2, Energy Efficiency. 2.1. For newly constructed low-rise residential buildings, comply with the energy efficiency requirements in Sections A4.203.1, A4.203.1.1, Table A4.203.1.1, A4.203.1.2 and A4.203.1.3.
From Division A4.3, Water Efficiency and Conservation. 3.1. Comply with at least two elective measures selected from Division A4.3.
From Division A4.4, Material Conservation and Resource Efficiency. 4.1. Comply with the 20 percent cement reduction requirements in Section A4.403.2. 4.2. Comply with the 10 percent recycled content requirements in Section A4.405.3.1. 4.3. Comply with the 65 percent reduction in construction waste in Section A4.408.1. 4.4. Comply with at least two elective measures selected from Division A4.4.
From Division A4.5, Environmental Quality. 5.1. Comply with the 90 percent resilient flooring systems requirements in Section A4.504.2. 5.2. Comply with the thermal insulation requirements for Tier 1 in Section A4.504.3. 5.3. Comply with at least one elective measure selected from Division A4.5.
Note: The Residential Occupancies Application Checklist contained in Section A4.602 may be used to show which elective measures are selected.
A4.601.5 Tier 2. To achieve Tier 2 status a project must comply with the following.
Note: The measures necessary to achieve Tier 2 status are very stringent. Cities, counties, and cities and counties considering adoption of Tier 2 as mandatory should carefully consider the stringency of each measure and ensure that the measures are achievable in their location.
§ 18941.5 Medium relevance — show source text
Local modifications shall comply with Health and Safety Code Section 18941.5 for Building Standards Law, Health and Safety Code Section 17958 for State Housing Law or Health and Safety Code Section 13869.7 for Fire Protection Districts.
1.1.8.1 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.
Exception: Hazardous building ordinances and programs mitigating unreinforced masonry buildings. 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, Division of Codes and Standards, P.O. Box 278180, Sacramento, CA 95827-8180 or 9342 Tech Center Drive, Suite 500, Sacramento, CA 95826-2581.
1.1.8.2 Locally adopted energy standards – California Energy Code, Part 6
In addition to the provisions of Section 1.1.8.1 of this Part, the provisions of this section shall apply to a city, county, and city and county adopting local energy standards applicable to buildings and structures subject to the California Energy Code, Part 6.
Applicable provisions of Public Resources Code Section 25402.1(h)(2) and applicable provisions of Section 10-106, Chapter 10 of the California Administrative Code, Part 1 apply to locally adopted energy standards amending the California Energy Code, Part 6.
1.1.9 Effective date of this code. Only those standards approved by the California Building Standards Commission that are effective at the time an application for building permit is submitted shall apply to the plans and specifications for, and to the construction performed under, that permit. For the effective dates of the provisions contained in this code, see the History Note page of this code.
Exceptions: (1) [HCD 1 & HCD 2] Retroactive permits issued in accordance with Health and Safety Code Section 17958.12. (2) [HCD 1 & HCD 2] Plans approved by the Department of Housing and Community Development or a Department-approved design approval agency for factory-built housing as defined by Health and Safety Code Section 19971. Approved plans, pursuant to the California Code of Regulations, Title 25, Division 1, Chapter 3, Subchapter 1, Article 3, Section 3048 remain valid for a period of 36 months from the date of plan approval.
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 maintained 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).
§ 1.1.8 Medium relevance — show source text
1.1.8 City, county, or city and county amendments, additions or deletions. The provisions of this code do not limit the authority of city, county, or city and county governments to establish more restrictive and reasonably necessary differences to the provisions contained in this code pursuant to complying with Section 1.1.8.1. The effective date of amendments, additions or deletions to this code by a city, county, or city and county filed pursuant to Section 1.1.8.1 shall be the date 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 for Building Standards Law, Health and Safety Code Section 17958 for State Housing Law or Health and Safety Code Section 13869.7 for Fire Protection Districts.
1.1.8.1 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. Exception: Hazardous building ordinances and programs mitigating unreinforced masonry buildings. 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, Division of Codes and Standards, P.O. Box 278180, Sacra- mento, CA 95827-8180 or 9342 Tech Center Drive, Suite 500, Sacramento, CA 95826-2582.
— 1.1.8.2 Locally adopted energy standards California Energy Code, Part 6.
In addition to the provisions of Section 1.1.8.1 of this part, the provisions of this section shall apply to a city, county, and cities and counties adopting local energy standards applicable to buildings and structures subject to the California Energy Code, Part 6.
Applicable provisions of Public Resources Code Section 25402.1(h)(2) and applicable provisions of Section 10-106, Chapter 10 of the California Administrative Code, Part 1 apply to locally adopted energy standards amending the California Energy Code, Part 6.
1.1.9 Effective date of this code. Only those standards approved by the California Building Standards Commission that are effective at the time an application for building permit is submitted shall apply to the plans and specifications for, and to the construction performed under, that permit. For the effective dates of the provisions contained in this code, see the History Note page of this code.
§ 1.1.8 Medium relevance — show source text
1.1.8 City, county or city and county amendments, additions or deletions. The provisions of this code do not limit the authority of city, county or city and county governments to establish more restrictive and reasonably necessary differences to the provisions contained in this code pursuant to complying with Section 1.1.8.1. The effective date of amendments, additions or deletions to this code of a city, county or a city and county filed pursuant to Section 1.1.8.1 shall be the date filed. However, in no case shall the amend- ments, 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 for Building Standards Law, Health and Safety Code, Section 17958 for State Housing Law or Health and Safety Code, Section 13869.7 for Fire Protection Districts.
1.1.8.1 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. Exception: Hazardous building ordinances and programs mitigating unreinforced masonry buildings. 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, Division of Codes and Standards, P.O. Box 1407, Sacra- mento, CA 95812-1407 or 2020 West El Camino Avenue, Suite 250, Sacramento, CA 95833-1829.
1.1.8.2 Locally adopted energy standards—California Energy Code, Part 6
In addition to the provisions of Section 1.1.8.1 of this Part, the provisions of this section apply to cities, counties and city and county amending adopted energy standards affecting buildings and structures subject to the California Energy Code, Part 6.
Applicable provisions of Public Resources Code Section 25402.1 and applicable provisions of Chapter 10 of the California Adminis- trative Code, Part 1 apply to local amendment of energy standards adopted by the California Energy Commission.
1.1.9 Effective date of this code. Only those standards approved by the California Building Standards Commission that are effective at the time an application for building permit is submitted shall apply to the plans and specifications for, and to the construction performed under, that permit. For the effective dates of the provisions contained in this code, see the History Note page of this code.
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 maintained 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).
Frequently asked questions
Can a city enforce a local energy requirement immediately after passing its ordinance?
No. If the ordinance changes or makes mandatory any Part 6 energy provisions (including Appendix A measures), the city must first obtain the CEC findings required under Title 24, Part 1 § 10‑106 and then file the ordinance and express findings with the CBSC under § 101.7 before enforcement.
What must the local findings say?
Findings must be express and tie the amendment to local climatic, topographical, or geological (or other local environmental) conditions as provided by § 101.7.1; file the findings with the CBSC and cross‑reference each amendment.
Where are the administrative rules (appeals, enforcement, approved calculation methods) for local energy standards located?
Administrative rules covering permit requirements, enforcement by the Commission, interpretations, appeals and approved calculation methods are referenced in § 100.0(g) and detailed in Title 24, Part 1 §§ 10‑101 through 10‑114.
If a jurisdiction adopts an Appendix A Tier as mandatory, is that treated differently than a custom local standard?
No — whether adopting Appendix A measures (A4/A5) or a custom local energy standard, the code requires the CEC finding under § 10‑106 before enforcement and filing with CBSC per § 101.7. The Appendices merely provide ready‑made measures and numeric targets (for example Table A4.203.1.1).
Where can I find the specific LSC margins or tier thresholds to reference in an ordinance?
Appendix A4 (residential) includes Table A4.203.1.1—recommended LSC margins by climate zone and Appendix A5 contains tier prerequisites for nonresidential measures. Cite those tables/sections in the ordinance and in your filings.
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