CBC · California Building Code

Do voluntary tier measures and appendices apply to additions/alterations?

Appendix A5 (nonresidential voluntary CALGreen measures) is written to include newly constructed buildings, additions and alterations in its scope, but the appendix remains voluntary unless the local jurisdiction adopts it; when adopted, A5 and its Tier checklists apply to additions/alterations subject to the size/valuation thresholds and scoping rules in § A5.203.1 and § 301.3 .

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Last reviewed: July 5, 2026

What the code requires — 2-4 sentences

Appendix A5 voluntary measures (the nonresidential CALGreen voluntary measures) are written to cover newly constructed buildings and also building additions and alterations where those additions/alterations are within the scope described by the code. In particular, the performance approach in § A5.203.1 explicitly states that "newly constructed buildings and additions are included in the scope" for the energy-performance provisions, and the appendix scope confirms voluntary measures apply to newly constructed nonresidential buildings as well as additions and alterations when adopted by a jurisdiction § A5.203.1 . Where additions/alterations are involved the scoping rules in § 301.3 (nonresidential additions and alterations) control which parts of the building the measures apply to § 301.3 .

Requirements in detail

1) Basic scope rule

  • Appendix A5 is voluntary at the state level and is "not mandatory unless adopted by local government" — local adoption is required before the appendix or tier measures are enforceable as mandatory local requirements § A5.601.1 .
  • The performance approach (A5.203) for energy explicitly includes newly constructed buildings and additions in its scope; buildings permitted without lighting or mechanical systems still must meet certain parts of § A5.203.1 (see text in that section) § A5.203.1 .
  • For nonresidential projects the general scoping rule for additions/alterations is in § 301.3: Chapter 5 provisions apply to newly constructed buildings, building additions of 1,000 sq ft or greater, and building alterations with a permit valuation of $200,000 or above; code sections apply only to the portions being added or altered § 301.3 .

2) When tiers/checklists apply to additions/alterations

  • The Tier 1 and Tier 2 checklists in Appendix A5 are written to be used for new construction, and for additions greater than or equal to 1,000 sq ft or alterations with a permit valuation ≥ $200,000 — i.e., those size/valuation thresholds specified in the A5 verification guidance are the practical triggers for using the Tier compliance checklists § A5.602.1 and A5.602.2 .
  • The Tier energy prerequisites refer back to A5.203.1. To meet Tier 1 a project must meet one of the listed efficiency measures; Tier 2 requires two (see § A5.203.1.1 for the prerequisite counts) § A5.203.1.1 .
  • Appendix A5's Tier content (for example the list of mandatory prerequisites and elective measures for Tier 1 and Tier 2) specifically describes how additions and alterations are treated and points you to the scoping provisions in § 301.3 for application to additions/alterations § A5.601.1 and § A5.601.2 .

Decision table — what to check on your project

Decision dimension Value / threshold Effect (decision you must make) Code Reference
Project type New construction Appendix A5 voluntary performance and tier measures explicitly include new construction § A5.203.1
Project type Addition If addition, check size threshold (1,000 sq ft) and apply A5 provisions only to the added portion per § 301.3 § 301.3 and § A5.203.1
Project type Alteration If alteration, check permit valuation threshold ($200,000) and apply A5 provisions only to the altered portion per § 301.3 § 301.3
Local adoption Appendix not adopted locally Appendix A5 measures remain voluntary; jurisdiction may adopt tiers as mandatory locally per § 101.7 / A5.601.1 § A5.601.1
Tier checks Addition ≥1,000 sq ft or alteration permit ≥$200,000 Use Tier 1/2 checklists (A5.602.1 / A5.602.2) and meet Tier prerequisites (A5.203.1.1) § A5.602.1 / § A5.203.1.1
Systems included Project includes lighting or mechanical systems Section A5.203.1 performance provisions apply to buildings that include lighting and/or mechanical systems; if no such systems, parts of § A5.203.1 may not apply § A5.203.1 § A5.203.1

3) How to apply the rules in practice

  • First, determine whether the local jurisdiction has adopted Appendix A5 or any voluntary tiers as mandatory; absent local adoption the appendix remains voluntary (§ A5.601.1) § A5.601.1 .
  • If adopting Tier 1/2, use the verification checklists in A5.602; they explicitly call out application to "new construction, or building additions of 1,000 square feet or greater, or building alterations with a permit valuation of $200,000 or more pursuant to Section 301.3" § A5.602.1 .
  • Apply measures only to the portion of the building within the scope of the permitted work (per § 301.3) — the code instructs that code sections for additions/alterations apply only to the portions being added/altered § 301.3 .

Exceptions & special cases

  • Local adoption required: Appendix A5 measures are not state-mandatory; a jurisdiction must adopt those measures for them to be mandatory locally (§ A5.601.1) § A5.601.1 .
  • Projects without lighting/mechanical systems: § A5.203.1 notes that buildings permitted without lighting or mechanical systems must comply with the subsection(s) that apply; some performance subsections (e.g., A5.203.1.2) may not be required for such projects § A5.203.1 .
  • Scoping limit: The Chapter 5 scoping rule requires application only to the work area; you do not retroactively apply unrelated portions of the building unless the permit causes a change that triggers broader requirements (§ 301.3) § 301.3 .
  • Size/valuation thresholds matter: The A5 verification guidance sets practical thresholds for when the Tier checklists are used (e.g., additions ≥ 1,000 sq ft; alterations with valuation ≥ $200,000) — smaller additions/low-valuation alterations generally use the mandatory measures checklist or are N/A for certain A5 items § A5.602.1 .
  • Whole-building LCA and small-project exceptions: Appendix sections addressing whole-building life-cycle assessment and related provisions include special application rules for projects under certain total areas (e.g., references to projects under 50,000 sq ft and how those may comply) — those special rules appear elsewhere in Appendix A5 and should be checked for projects near those thresholds § A5.409.2 commentary .

Common mistakes

  • Treating appendices as automatically mandatory: Many assume appendix measures apply statewide without local adoption — the code is explicit that Appendix A5 is voluntary unless adopted locally § A5.601.1 .
  • Applying A5 requirements to the entire building when the permit only covers a portion: Chapter 3/§ 301.3 clarifies measures apply only to the areas being added/altered (except where a specific provision says otherwise) § 301.3 .
  • Ignoring thresholds: Not checking the 1,000 sq ft / $200,000 thresholds that trigger Tier checklists leads to incorrect application of checklists and documentation requirements § A5.602.1 .
  • Overlooking systems scope: Assuming A5.203 performance requirements always apply; some subsections apply only when lighting or mechanical systems are included § A5.203.1 .

Worked example — concrete scenario

Scenario: A property owner proposes a 1,200 sq ft conditioned addition to an existing nonresidential office building. The work includes lighting and mechanical systems. The jurisdiction has adopted Appendix A5 and established CALGreen Tier 1 locally.

Step 1 — Confirm scoping/thresholds:

  • Because this is an addition ≥ 1,000 sq ft, the Tier 1 checklist (A5.602.1) is the applicable verification tool per the appendix guidance § A5.602.1 .
  • Per § 301.3, the code sections apply only to the added portion (the 1,200 sq ft) § 301.3 .

Step 2 — Meet energy prerequisites:

  • For Tier 1, the project must satisfy the Tier 1 energy prerequisite(s) in A5.203.1.1 (Tier 1 requires ONE of the listed efficiency measures for applicable components). Because the addition includes lighting and mechanical systems, the building must comply with the energy performance subsections in A5.203.1 (the section explicitly includes additions in scope) § A5.203.1 and § A5.203.1.1 .

Step 3 — Select other required voluntary measures:

  • A5.601.2.4 describes sample Tier 1 voluntary measures (e.g., parking designations for high-efficiency vehicles, EV charging readiness, cool roof criteria, and a selection of electives across divisions). The project must comply with the Tier 1 prerequisites and the specified number of elective measures in the divisions indicated for Tier 1 § A5.601.2.4 .

Step 4 — Document and verify:

  • Use the Tier 1 checklist and include documentation that mandatory Chapter 5 measures are met prior to Tier measures, and that the chosen Tier prerequisites/electives are applied to the added area. The verification checklist language specifically applies to new construction and additions ≥ 1,000 sq ft § A5.602.1 .

Result: The 1,200 sq ft addition must comply with the Tier 1 prerequisites and elective-count rules, but only for the new addition area (unless local amendment or another code section triggers a broader application) § A5.203.1, § A5.601.2.4, § A5.602.1 .

Related provisions

  • § A5.203.1 — Performance approach; scope: newly constructed buildings and additions included in scope § A5.203.1
  • § A5.601.1 — Appendix A5 scope; voluntary unless adopted locally; covers newly constructed buildings as well as additions and alterations § A5.601.1
  • § A5.601.2 — CALGreen Tier 1 prerequisites and tie-in to A5.203.1.1/1.2.1 § A5.601.2
  • § A5.602.1 — Tier 1 verification checklist: application thresholds (new construction, additions ≥1,000 sq ft, alterations ≥ $200,000) § A5.602.1
  • § 301.3 — Scoping for nonresidential additions and alterations; apply measures only to portions of building being added/altered § 301.3
  • § 304.1 — Voluntary tiers purpose and local adoption process (overview of tiers) § 304.1
  • § A5.409.2 (and related) — Special application rules for whole-building life-cycle assessment and area-based thresholds (e.g., sub‑50,000 sq ft rules) § A5.409.2 commentary

Code references

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

  • CGBSC § 2025 High relevance — show source text

    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.

    SAMPLE RESOLUTION FOR ADOPTION OF THE TIER 1 OR TIER 2 PROVISIONS OF THE CALIFORNIA GREEN BUILDING STANDARDS CODE WITH OR WITHOUT ADDITIONAL ITEMS NECESSARY TO ADDRESS INNOVATIVE CONCEPTS OR LOCAL ENVIRONMENTAL CONDITIONS.

    ATTACHMENT___.

    SAMPLE RESOLUTION ADOPTING THE CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDICES AS A MANDATORY REFERENCE STANDARD

    CITY OF ________________________

    RESOLUTION # __________________

    RESOLUTION ADOPTING ENHANCED GREEN BUILDING MEASURES FOR NEW AND EXISTING RESIDENTIAL CONSTRUCTION.

    WHEREAS, the City/County of ______’s (City or County) General Plan sets forth goals for preserving and improving the natural and built environment of the City/County, protecting the health of its residents and visitors, and fostering its economy; and

    WHEREAS, green building is a holistic approach to design, construction and demolition that minimizes the building’s impact on the environment, the occupants and the community; and

    WHEREAS, green buildings benefit building industry professionals, residents and communities by improving construction quality; increasing building durability; reducing utility, maintenance, water and energy costs; creating healthier homes; and enhancing comfort and livability; and

    WHEREAS, the California Green Building Standards Code appendices have included voluntary tiers to provide a city, county, or city and county, building professionals, and the general public with a range of voluntary green building measures for builders to choose from when constructing homes in California; and

    WHEREAS, the California Green Building Standards Code appendices benefited from extensive input from a city, county, or city and county, building professionals, State agencies, and recognized green building professionals and the practices contained in these guidelines were selected for their viability in today’s market and their ability to promote sustainable buildings and communities; and

    WHEREAS, adoption of the California Green Building Standards Code appendices promotes statewide consistency and predictability for building professionals; and

    NOW THEREFORE, BE IT RESOLVED, that the City/County hereby finds that green building design, construction and operation furthers the goals set forth in the City/County General Plan, including land use, conservation, open space and (include others, if applicable).

    NOW THEREFORE, BE IT RESOLVED, that newly constructed residential buildings, alterations or additions to residential buildings shall meet the _______ (Tier 1 or Tier 2) measures contained in the California Green Building Standards Code appendices and the green building design, construction and operation innovative concepts or additions or amendment thereto contained in Attachment _____ to address local environmental conditions; and

    NOW THEREFORE, BE IT FURTHER RESOLVED, that the City Council or County Board of Supervisors of the City/County of ___________ adopts the California Green Building Standards Code appendices, as they may be amended from time to time, as a City/County mandatory reference document and directs City/County staff to enforce these green building measures as mandatory standards within the City/County.

    ADOPTED BY THE FOLLOWING VOTE:

    AYES:

    NOES:

    ABSENT:

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A4-31

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  • CGBSC § 2025 High relevance — show source text

    WHEREAS, adoption of the California Green Building Standards Code appendices promotes statewide consistency and predictability for building professionals; and

    NOW THEREFORE, BE IT RESOLVED, that the City/County hereby finds that green building design, construction and operation furthers the goals set forth in the City/County General Plan, including land use, conservation, open space and (include others, if applicable).

    NOW THEREFORE, BE IT RESOLVED, that newly constructed residential buildings, alterations or additions to residential buildings shall meet the _______ (Tier 1 or Tier 2) measures contained in the California Green Building Standards Code appendices and the green building design, construction and operation innovative concepts or additions or amendment thereto contained in Attachment _____ to address local environmental conditions; and

    NOW THEREFORE, BE IT FURTHER RESOLVED, that the City Council or County Board of Supervisors of the City/County of ___________ adopts the California Green Building Standards Code appendices, as they may be amended from time to time, as a City/County mandatory reference document and directs City/County staff to enforce these green building measures as mandatory standards within the City/County.

    ADOPTED BY THE FOLLOWING VOTE:

    AYES:

    NOES:

    ABSENT:

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A4-31

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    APPENDIX A4-32 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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    CALIFORNIA GREEN BUILDING STANDARDS CODE – MATRIX ADOPTION TABLE

    APPENDIX A5 – NONRESIDENTIAL VOLUNTARY MEASURES

    DIVISION A5.1 – PLANNING AND DESIGN

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

    Adopting agency BSC BSC-
    CG    		 SFM HCD Col6 Col7 DSA Col9 OSHPD Col11 Col12 Col13 Col14 Col15 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting agency BSC BSC-
    CG    		 SFM 1 2 1/AC AC SS 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
    Adopt entire CA chapter X
    Adopt entire chapter as
    amended (amended
    sections listed below)
    Adopt only those sections that
    are listed below
    Chapter/Section

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-1

  • CBC § 301.5 High relevance — show source text

    301.5 Health Facilities. [OSHPD 1, 2 & 4] Health facilities under the jurisdiction of the Office of Statewide Health Planning and Development (OSHPD) are required to comply with the mandatory measures prescribed in Section 5.304, Outdoor Water Use. Compliance with Section 5.304, as adopted by the Building Standards Commission, is enforced by the local agency having jurisdiction. Evidence of local approval shall be submitted to OSHPD prior to issuance of plan approval or a building permit.

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 3-3

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    GREEN BUILDING

    SECTION 302—MIXED OCCUPANCY BUILDINGS

    302.1 Mixed occupancy buildings. In mixed occupancy buildings, each portion of a building shall comply with the specific green building measures applicable to each specific occupancy.

    Exceptions:

    1. [HCD] Accessory structures and accessory occupancies serving residential buildings shall comply with Chapter 4 and Appendix A4, as applicable.
    2. [HCD] For the purposes of CALGreen, live/work units, complying with Section 508.5 of the California Building Code, shall not be considered mixed occupancies. Live/work units shall comply with Chapter 4 and Appendix A4, as applicable.

    SECTION 303—PHASED PROJECTS

    303.1 Phased projects. For shell buildings and others constructed for future tenant improvements, only those code measures relevant to the building components and systems considered to be new construction (or newly constructed) shall apply.

    303.1.1 Initial tenant improvements. The provisions of this code shall apply only to the initial tenant improvements to a project. Subsequent tenant improvements shall comply with the scoping provisions in Section 301.3 nonresidential additions and alterations.

    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.

  • CBC § 5.508.2 High relevance — show source text

    000 square feet or more|5.508.2
    through
    5.508.2.6.3||||| |||END OF MANDATORY PROVISIONS||||||

    Documentation Author's / Responsible Designer's Declaration Statement
    □ Mandatory: I attest that this mandatory provisions checklist is accurate and complete.    		 Col2
    Signature: Signature:
    Company: Date:
    Address: License:
    City/State/Zip: Phone:

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-47

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    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    A5.602.1

    CALGreen VERIFICATION GUIDELINES

    TIER 1 CHECKLIST

    Application: This checklist shall be used for nonresidential projects that meet the following: new construction, or building additions of 1,000 square feet or greater, or building alterations with a permit valuation of $200,000 or more pursuant to Section 301.3, AND are adopting Tier 1 voluntary measures.

    Note: All applicable mandatory requirements in Chapter 5 shall be met prior to applying Tier 1 voluntary measures.

    Instructions:

    Comply with all Tier 1 prerequisite measures from the various categories shown on the table below.

    Add a “ Y ” to all mandatory and Tier 1 prerequisite measures in the appropriate columns.

    Select the required number of additional electives from those categories shown on the table below and add a “ Y ” on the selected elective and add an “ N ” on the rest.

    Count the total number of Tier 1 prerequisite measures plus the additional electives and write down the total number at the end of the checklist. Determine if the required number of Tier 1 measures have been selected to achieve Tier 1 compliance.

    Y = Yes (section has been selected and/or included) N = No (section has not been selected and/or included) O = Other (provide explanation)

    [N] = New construction pursuant to Section 301.3

    [A] = Additions and/or Alterations pursuant to Section 301.3

    CHAPTER 5
    DIVISIONS    		 Col2 SECTION TITLE CODE
    SECTION    		 Y N O PLAN SHEET,
    SPEC OR
    ATTACH
    DIVISION 5.1
    Planning and
    Design
    (continued)    		 Mandatory Deconstruction and reuse of existing structures,
    Scope with Exception    		 5.105.1
    DIVISION 5.1
    Planning and
    Design
    (continued)    		 Mandatory Reuse of existing building & Verification of compliance with note 5.105.2 and 5.105.2.1
    DIVISION 5.1
    Planning and
    Design
    (continued)    		 Mandatory Storm water pollution prevention for projects that disturb
    less than 1 acre of land    		 5.106.1 through
    5.106.2
    DIVISION 5.1
    Planning and
    Design
    (continued)    		 Mandatory Short-term bicycle parking 5.106.4.1.
  • CBC § 409.4 High relevance — show source text

    Solar access is the ratio of solar insolation including shade to the
    solar insolation without shade. Shading from obstructions located on the roof or any other part of the building shall not be included in the determination of annual solar access.
    3.
    Life cycle assessment compliant with Section A5.409.4 in this code may be substituted for prescriptive measures from Division A5.4.|

    A5.601.1 Scope. The measures contained in this appendix are not mandatory unless adopted by local government as specified in Section 101.7. The provisions of this section outline means of achieving enhanced construction or reach levels by incorporating addi

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-41

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    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    tional green building measures for newly constructed nonresidential buildings as well as additions and alterations. In order to meet one of the tier levels designers, builders or property owners are required to incorporate additional green building measures necessary to meet the threshold of each level. Refer to the provisions in Section 301.3 for nonresidential additions and alterations scope and application.

    A5.601.2 CALGreen Tier 1

    A5.601.2.1 Prerequisites. To achieve CALGreen tier status, a project must meet all of the mandatory measures in Chapter 5 and, in addition, meet the provisions of this section.

    A5.601.2.2 Energy performance. For the purposes of mandatory energy efficiency standards in this code, the California Energy Commission will continue to adopt mandatory standards.

    A5.601.2.3 Tier 1. Comply with the energy efficiency requirements in Section A5.203.1.1 and Section A5.203.1.2.1.

    A5.601.2.4 Voluntary measures for Tier 1. In addition to the provisions of Sections A5.601.2.1 and A5.601.2.3 above, compliance with the following voluntary measures from Appendix A5 is required for Tier 1:

    1. From Division A5.1, a. Comply with the designated parking requirements for high-efficiency vehicles for a minimum of 35 percent of parking capacity per Section A5.106.5.1. b. Electric vehicle (EV) charging [N] and Table A5.106.5.3.1 w/ footnotes. c. Comply with thermal emittance, solar reflectance or SRI values for cool roofs in Section A5.106.11.2 and Table A5.106.11.2.2. [1]

    d. Comply with one elective measure selected from this division. 2. From Division A5.2 comply with ONE of the following:

    1. Outdoor lighting as described in A5.203.1.1.1.

    2. Service water heating in restaurants as described in A5.203.1.1.2.

    3. Warehouse Dock Seal Doors A5.203.1.1.3.

    4. Daylight Design Power Adjustments 5.203.1.1.4.

    5. Exhaust Air Heat Recovery A5.203.1.1.5.

    6. From Division A5.3,

    a. Comply with the 12-percent reduction for indoor potable water use in Section A5.303.2.3.1. b. Comply with one elective measure selected from this division.

    1. From Division A5.4,
  • CBC § 3.4. High relevance — show source text

    [BS] ROOF COATING. A fluid-applied adhered coating used for roof maintenance, roof repair or as a component of a roof covering system or roof assembly.

    [BS] ROOF RECOVER. The process of installing an additional roof covering over a prepared existing roof covering without removing the existing roof covering.

    [BS] ROOF REPAIR. Reconstruction or renewal of any part of an existing roof for the purpose of correcting damage or restoring the predamage condition.

    [BS] ROOF REPLACEMENT. The process of removing the existing roof covering, repairing any damaged substrate and installing a new roof covering.

    SPC SEISMIC SEPARATION. [OSHPD 1 & 1R] Means a building separation in accordance with the California Administrative Code, Chap- ter 6 Section 3.4.

    SUBSTANDARD BUILDING. [HCD 1, HCD 2] See Health and Safety Code Section 17920.3.

    [BG] STORM SHELTER. A building, structure or portions thereof, constructed in accordance with ICC 500, designated for use during hurricanes, tornadoes or other severe windstorms.

    [BS] SUBSTANTIAL DAMAGE. For the purpose of determining compliance with the flood provisions of this code, damage of any origin sustained by a structure whereby the cost of restoring the structure to its before-damaged condition would equal or exceed 50 percent of the market value of the structure before the damage occurred.

    [BS] SUBSTANTIAL IMPROVEMENT. For the purpose of determining compliance with the flood provisions of this code, any repair, alteration, addition or improvement of a building or structure, the cost of which equals or exceeds 50 percent of the market value of the structure, before the improvement or repair is started. If the structure has sustained substantial damage, any repairs are considered substantial improvement regardless of the actual repair work performed. The term does not, however, include either of the following:

    1. Any project for improvement of a building required to correct existing health, sanitary or safety code violations identified by the code official and that is the minimum necessary to ensure safe living conditions.
    2. Any alteration of a historic structure, provided that the alteration will not preclude the structure’s continued designation as a historic structure.

    [BS] SUBSTANTIAL STRUCTURAL ALTERATION. An alteration in which the gravity load-carrying structural elements altered within a 5-year period support more than 30 percent of the total floor and roof area of the building or structure. The areas to be counted toward the 30 percent shall include mezzanines, penthouses, and in-filled courts and shafts tributary to the altered structural elements.

    [BS] SUBSTANTIAL STRUCTURAL DAMAGE. A condition where any of the following apply:

    1. The vertical elements of the lateral force-resisting system have suffered damage such that the lateral load-carrying capacity of any story in any horizontal direction has been reduced by more than 33 percent from its predamage condition.
    2. The capacity of any vertical component carrying gravity load, or any group of such components, that has a tributary area more than 30 percent of the total area of the structure’s floor(s) and roof(s) has been reduced more than 20 percent from its predamage condition, and the remaining capacity of such affected elements, with respect to all dead and live loads, is less than 75 percent of that required by the California Building Code for new buildings of similar structure, purpose and location.
  • CBC § 507.3 High relevance — show source text

    5**
    Environmen-
    tal
    Quality|Select One|Elective|Views|A5.507.3||||| |(continued)
    DIVISION 5.5
    Environmen-
    tal
    Quality|Select One|Elective|Interior office spaces|A5.507.3.1||||| |(continued)
    DIVISION 5.5
    Environmen-
    tal
    Quality|Select One|Elective|Multi-occupant spaces (with exceptions)|A5.507.3.2||||| |(continued)
    DIVISION 5.5
    Environmen-
    tal
    Quality|Select One|Elective|Hydrochlorofluorocarbons (HCFCs)|A5.508.1.3||||| |(continued)
    DIVISION 5.5
    Environmen-
    tal
    Quality|Select One|Elective|Hydrofluorocarbons (HFCs)|A5.508.1.4||||| |Additional
    Measures|Additional
    Measures||Select 1 additional measure from any division|Add section #||||| |Total number of Measures required|Total number of Measures required|Total number of Measures required|Total number of Measures required|15||||| |Total number of Measures selected|Total number of Measures selected|Total number of Measures selected|Total number of Measures selected||||||

    Documentation Author's / Responsible Designer's Declaration Statement
    Check the appropriate box(es) for the list below.
    □ Mandatory: I attest that the mandatory provisions checklist is accurate and complete.
    □ Tier 1 compliant: I attest that the total number of voluntary measures selected meet or exceed the total number required
    to achieve Tier 1 compliance.
    □ Partial Tier 1 compliant: I attest that the total number of voluntary measures selected do not meet the total number
    required to achieve Tier 1 compliance: however, partial Tier 1 compliance has been achieved.    		 Col2
    Signature:
    Company: Date:
    Address: License:
    City/State/Zip: Phone:

    APPENDIX A5-54 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    A5.602.2

    CALGreen VERIFICATION GUIDELINES

    TIER 2 CHECKLIST

    Application: This checklist shall be used for nonresidential projects that meet the following: new construction, or building additions of 1,000 square feet or greater, or building alterations with a permit valuation of $200,000 or more pursuant to Section 301.3, AND are adopting Tier 2 voluntary measures.

    Note: All applicable mandatory requirements in Chapter 5 shall be met prior to applying Tier 2 voluntary measures.

    Instructions:

    Comply with all Tier 2 prerequisite measures from the various categories shown on the table below.

    Add a “ Y ” to all mandatory and Tier 2 prerequisite measures in the appropriate columns.

  • CBC § 602.2 High relevance — show source text
    Documentation Author's / Responsible Designer's Declaration Statement
    Check the appropriate box(es) for the list below.
    □ Mandatory: I attest that the mandatory provisions checklist is accurate and complete.
    □ Tier 1 compliant: I attest that the total number of voluntary measures selected meet or exceed the total number required
    to achieve Tier 1 compliance.
    □ Partial Tier 1 compliant: I attest that the total number of voluntary measures selected do not meet the total number
    required to achieve Tier 1 compliance: however, partial Tier 1 compliance has been achieved.    		 Col2
    Signature:
    Company: Date:
    Address: License:
    City/State/Zip: Phone:

    APPENDIX A5-54 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    A5.602.2

    CALGreen VERIFICATION GUIDELINES

    TIER 2 CHECKLIST

    Application: This checklist shall be used for nonresidential projects that meet the following: new construction, or building additions of 1,000 square feet or greater, or building alterations with a permit valuation of $200,000 or more pursuant to Section 301.3, AND are adopting Tier 2 voluntary measures.

    Note: All applicable mandatory requirements in Chapter 5 shall be met prior to applying Tier 2 voluntary measures.

    Instructions:

    Comply with all Tier 2 prerequisite measures from the various categories shown on the table below.

    Add a “ Y ” to all mandatory and Tier 2 prerequisite measures in the appropriate columns.

    Select the required number of additional electives from those categories shown on the table below and add a “ Y ” on the selected elective and add an “ N ” on the rest.

    Count the total number of Tier 2 prerequisite measures plus the additional electives and write down the total number at the end of the checklist. Determine if the required number of Tier 2 measures have been selected to achieve Tier 2 compliance.

    Y = Yes (section has been selected and/or included) N = No (section has not been selected and/or included) O = Other (provide explanation)

    [N] = New construction pursuant to Section 301.3

    [A] = Additions and/or Alterations pursuant to Section 301.3

    CHAPTER 5
    DIVISIONS    		 Col2 SECTION TITLE CODE
    SECTION    		 Y N O PLAN SHEET,
    SPEC OR
    ATTACH
    DIVISION 5.1
    Planning and
    Design
    (continued)    		 Mandatory Deconstruction and reuse of existing structures,
    Scope with Exception    		 5.105.1
    DIVISION 5.1
    Planning and
    Design
    (continued)    		 Mandatory Reuse of existing building & Verification of compliance with
    note    		 5.105.2 and 5.105.2.1
    DIVISION 5.1
    Planning and
    Design
    (continued)    		 Mandatory Storm water pollution prevention for projects that disturb
    less than 1 acre of land    		 5.106.1 through
    5.106.
  • CBC § 106.11.2.3 High relevance — show source text

    A5.106.11.2.3 Solar reflectance index alternative. Solar Reflectance Index (SRI) equal to or greater than the values specified in Table A5.106.11.2.2 for Tier 1 and Table A5.106.11.2.3 for Tier 2 may be used as an alternative to compliance with the aged solar reflectance values and thermal emittance.

    SRI values used to comply with this section shall be calculated using the Solar Reflectance Index (SRI) Calculation Worksheet (SRI-WS) developed by the California Energy Commission or in compliance with ASTM E1980-11 as specified in the California Energy Code, Section 110.8(i)3. Solar reflectance values used in the SRI-WS shall be based on the aged reflectance value of the roofing product or the equation in section A5.106.11.2.1 if the CRRC certified aged solar reflectance are not available. Certified Thermal emittance used in the SRI-WS may be either the initial value or the aged value listed by the CRRC.

    Solar reflectance and thermal emittance may also be certified by other supervisory entities approved by the Commission pursuant to Title 24, Part 1, California Administrative Code.

    Note: The Solar Reflectance Index Calculation Worksheet (SRI-WS) is available by contacting the Energy Standard Hotline at 1-800-772-3300, website at www.energy.ca.gov or by email at Title24@ energy.state.ca.us.

    TABLE A5.106.11.2.3 [BSC]—TIER 2 Col2 Col3 Col4 Col5
    ROOF SLOPE CLIMATE ZONE MINIMUM AGED SOLAR REFLECTANCE THERMAL EMITTANCE SRI
    ≤ 2:12 1–16 0.68 0.85 82
    > 2:12 1–16 0.28 0.85 27

    A5.106.11.2.4 Verification of compliance. If no documentation is available, an inspection shall be conducted to ensure roofing materials meet cool roof aged solar reflectance and thermal emittance or SRI values.

    A5.106.11.3 Shade trees. In the absence of a local shade tree ordinance, comply with mandatory Section 5.106.12 Shade trees.

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    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    SECTION A5.107—BIRD-FRIENDLY BUILDING DESIGN

    A5.107 Bird-friendly building design. A newly constructed building, or an alteration of an existing building that includes the addition or replacement of 50 percent or more of the exterior glazing, shall comply with the bird-friendly building design elements and features in Sections A5.107.1 through A5.107.3 of the California Energy Code and the fire hazard severity zone regulations in Chapter 7A of the California Building Code.

    Exception: Alteration to the glazing in historical buildings per the California Historical Building Code .

  • CBC § 203.1.2.1 Medium relevance — show source text

    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

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    APPENDIX A4 — RESIDENTIAL VOLUNTARY MEASURES

    SECTION A4.602—RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST—continued

    FEATURE OR MEASURE LEVELS
    APPLICANT TO SELECT ELECTIVE MEASURES    		 Col3 Col4 VERIFICATIONS
    ENFORCING AGENCY TO SPECIFY
    VERIFICATION METHOD    		 Col6 Col7
    FEATURE OR MEASURE Mandatory Prerequisites and electives1 Prerequisites and electives1 Enforcing
    Agency

    All    		 Installer or
    Designer

    All    		 Third
    party

    All
    FEATURE OR MEASURE Mandatory Tier 1 Tier 2 Tier 2 Tier 2 Tier 2
    WATER EFFICIENCY AND CONSERVATION
    Indoor Water Use
    4.303.1Plumbing fixtures (water closets and urinals) and fittings
    (showerheads, faucets and pre-rinse spray valves) installed in
    residential buildings shall comply with the prescriptive requirements
    of Sections 4.303.1.1 through 4.303.1.4.5.
    4.303.2 Submeters for multifamily building and dwelling units in
    **mixed-use residential/commercial buildings.
  • CFC § 202 Medium relevance — show source text

    APPENDIX O – VALET TRASH AND RECYCLING COLLECTION IN GROUP R-2 OCCUPANCIES

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

    (Not adopted by the State Fire Marshal)

    Adopting Agency BSC BSC-
    CG    		 SFM Col5 HCD Col7 Col8 DSA Col10 OSHPD Col12 Col13 Col14 Col15 Col16 BSCC DPH AGR DWR CEC CA SL SLC
    Adopting Agency BSC BSC-
    CG    		 T-24 T-19* 1 2 1/AC AC SS 1 1R 2 3 4 5 5 5 5 5 5 5 5 5
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended sections
    listed below)
    Adopt only those sections that
    are listed below
    [California Code of Regulations,
    Title 19, Division 1]
    Chapter / Section
    • The California Code of Regulations (CCR), Title 19, Division 1 provisions that are found in the California Fire Code are a reprint from the current CCR, Title 19, Division 1 text for the code user’s convenience only. The scope, applicability and appeals procedures of CCR, Title 19, Division I remain the same.

    2025 CALIFORNIA FIRE CODE APPENDIX O-1

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    APPENDIX O-2 2025 CALIFORNIA FIRE CODE

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    O VALET TRASH AND RECYCLING COLLECTION

    IN GROUP R-2 OCCUPANCIES

    The provisions contained in this appendix are not mandatory unless specifically referenced in the adopting ordinance or legislation of the jurisdiction.

    User notes:

    About this appendix: Appendix O provides for valet trash and recycling collection services in Group R-2 occupancies. These collection services are formally defined in Section 202 as “Valet Trash Collection,” which includes recycling. Occupants receiving this service place trash and recyclables in the corridor outside their residence for pickup by a collection service on a regularly scheduled basis in accordance with restrictions, as prescribed by this appendix.

    ICC code development note: Code change proposals to this appendix will be considered by the IFC Code Development Committee during the 2024 (Group

    A) Code Development Cycle.

    SECTION O101—SCOPE

    O101.1 Scope. Valet trash collection in Group R-2 occupancies shall comply with this appendix.

    SECTION O102—CONTAINERS

  • CBC § 106.9 Medium relevance — show source text
    FEATURE OR MEASURE COMPLIANCE LEVELS Col3 Col4 NOTES
    FEATURE OR MEASURE Mandatory
    CALGreen    		 VOLUNTARY
    CALGreen    		 VOLUNTARY
    CALGreen    		 VOLUNTARY
    CALGreen
    FEATURE OR MEASURE Mandatory
    CALGreen    		 Tier 1 Tier 2 Tier 2
    DIVISION A6.1 – PLANNING AND DESIGN
    SECTION Site Development SECTION Site Development SECTION Site Development SECTION Site Development SECTION Site Development
    **A6.106.9 Building orientation.**Locate and orient the building as follows:
    1. When site and location permit, orient the building with the long sides facing north and
    south.
    2. Protect the building from thermal loss, drafts and degradation of the building envelope
    caused by wind and wind-driven materials such as dust.
    DIVISION A6.2 – ENERGY EFFICIENCY
    SECTION A6.203 Performance Measures SECTION A6.203 Performance Measures SECTION A6.203 Performance Measures SECTION A6.203 Performance Measures SECTION A6.203 Performance Measures
    A6.203.1 Energy performance. [OSHPD 1]
    **A6.203.1.1 CALGreen Tier 1. [OSHPD 1]**Buildings must comply with the latest edition of
    “Savings By Design, Healthcare Modeling Procedures.”
    A.5.203.1.2 CALGreen Tier 2. [OSHPD 1] Buildings must exceed the latest edition of “Savings
    By Design, Healthcare Modeling Procedures” by 15 percent.
    SECTION A6.204 Prescriptive Measures
    **A6.204.1 ENERGY STAR equipment and appliances.**All equipment and appliances provided
    by the builder shall be ENERGY STAR labeled if ENERGY STAR is applicable to that equipment
    or appliance.
    A6.204.4 Commissioning. Building commissioning for all building systems covered by T24,
    Part 6, process systems and renewable energy systems shall be included in the design and
    construction processes of the building project. Commissioning requirements shall include as
    a minimum items listed in Section A6.204.4.
    **A6.204.4.1 Owner’s Project Requirements (OPR).**Documented before the design phase of
    the project begins the OPR shall include items listed in Section A6.204.4.
    **A6.204.4.2 Basis of Design (BOD).**A written explanation of how the design of the building
    systems meets the OPR shall be completed at the design phase of the building project and
    updated periodically to cover the systems listed in Section A6.204.4.2.
    **A6.204.4.3 Commissioning plan.
  • CBC § 301.1.1 High relevance — show source text

    1||||X||||X||||||||||||||| |301.1.1||||X||||||||||||||||||| |301.2||||X||||||||||||||||||| |301.3||X||||||||||||||||||||| |301.3.1||X||||||||||||||||||||| |301.3.2||X||||||||||||||||||||| |301.4||||||||X||||||||||||||| |301.5|||||||||X||X||X|||||||||| |302||X||X||||X|X||X||X|||||||||| |303||X||X|||||X||X||X|||||||||| |303.1||X||||||||||||||||||||| |304||X||X|||||X||X||X|||||||||| |305|||||||||X|||||||||||||| |306||||||||X|||||||||||||||

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 3-1

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    3-2 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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    3 GREEN BUILDING

    SECTION 301—GENERAL

    301.1 Scope. Buildings shall be designed to include the green building measures specified as mandatory in the application checklists contained in this code. Voluntary green building measures are also included in the application checklists and may be included in the design and construction of structures covered by this code, but are not required unless adopted by a city, county, or city and county as specified in Section 101.7.

    301.1.1 Additions and alterations. [HCD] The mandatory provisions of Chapter 4 shall be applied to additions or alterations of existing residential buildings where the addition or alteration increases the building’s conditioned area, volume or size. The requirements shall apply only to and/or within the specific area of the addition or alteration.

    The mandatory provisions of Section 4.106.4.2 may apply to additions or alterations of existing parking facilities or the addition of new parking facilities serving existing multifamily buildings. See Section 4.106.4.3 for application.

    Note: Repairs including, but not limited to, resurfacing, restriping, and repairing or maintaining existing lighting fixtures are not considered alterations for the purpose of this section.

    301.2 Low-rise and high-rise residential buildings. [HCD] The provisions of individual sections of CALGreen may apply to either low-rise residential buildings, high-rise residential buildings, or both. Individual sections will be designated by banners to indicate where the section applies specifically to low-rise only (LR) or high-rise only (HR). When the section applies to both low-rise and highrise buildings, no banner will be used.

    301.3 Nonresidential additions and alterations. [BSC-CG] The provisions of individual sections of Chapter 5 apply to newly constructed buildings, building additions of 1,000 square feet or greater, and/or building alterations with a permit valuation of $200,000 or above (for occupancies within the authority of California Building Standards Commission). Code sections relevant to additions and alterations shall only apply to the portions of the building being added or altered within the scope of the permitted work.

    A code section will be designated by a banner to indicate where the code section only applies to newly constructed buildings [N] or to additions and/or alterations [A] . When the code section applies to both, no banner will be used.

  • CBC § 409.4 High relevance — show source text

    Shading from obstructions located on the roof or any other part of the building shall not be included in the determination of annual solar access.
    3.
    Life cycle assessment compliant with Section A5.409.4 in this code may be substituted for prescriptive measures from Division A5.4.|1.
    Exception: Allowance may be permitted in Tier 2 for up to 5-percent specialty purpose flooring.
    2.
    Solar water-heating system requirement for newly constructed restaurants as per A5.203.1.1.2.
    Exceptions:
    a. Buildings with a natural gas service water heater with a minimum of 95-percent thermal efficiency.
    b. Buildings where greater than 75 percent of the total roof area has annual solar access that is less than 70 percent. Solar access is the ratio of solar insolation including shade to the
    solar insolation without shade. Shading from obstructions located on the roof or any other part of the building shall not be included in the determination of annual solar access.
    3.
    Life cycle assessment compliant with Section A5.409.4 in this code may be substituted for prescriptive measures from Division A5.4.|1.
    Exception: Allowance may be permitted in Tier 2 for up to 5-percent specialty purpose flooring.
    2.
    Solar water-heating system requirement for newly constructed restaurants as per A5.203.1.1.2.
    Exceptions:
    a. Buildings with a natural gas service water heater with a minimum of 95-percent thermal efficiency.
    b. Buildings where greater than 75 percent of the total roof area has annual solar access that is less than 70 percent. Solar access is the ratio of solar insolation including shade to the
    solar insolation without shade. Shading from obstructions located on the roof or any other part of the building shall not be included in the determination of annual solar access.
    3.
    Life cycle assessment compliant with Section A5.409.4 in this code may be substituted for prescriptive measures from Division A5.4.|

    A5.601.1 Scope. The measures contained in this appendix are not mandatory unless adopted by local government as specified in Section 101.7. The provisions of this section outline means of achieving enhanced construction or reach levels by incorporating addi

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    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    tional green building measures for newly constructed nonresidential buildings as well as additions and alterations. In order to meet one of the tier levels designers, builders or property owners are required to incorporate additional green building measures necessary to meet the threshold of each level. Refer to the provisions in Section 301.3 for nonresidential additions and alterations scope and application.

    A5.601.2 CALGreen Tier 1

    A5.601.2.1 Prerequisites. To achieve CALGreen tier status, a project must meet all of the mandatory measures in Chapter 5 and, in addition, meet the provisions of this section.

    A5.601.2.2 Energy performance. For the purposes of mandatory energy efficiency standards in this code, the California Energy Commission will continue to adopt mandatory standards.

  • CBC § 507.4.1.1 High relevance — show source text

    507.4.1.1||||| |(continued)
    DIVISION 5.5
    Environmental
    Quality|Mandatory|Performance method|5.507.4.2||||| |(continued)
    DIVISION 5.5
    Environmental
    Quality|Mandatory|Site features|5.507.4.2.1||||| |(continued)
    DIVISION 5.5
    Environmental
    Quality|Mandatory|Documentation of compliance|5.507.4.2.2||||| |(continued)
    DIVISION 5.5
    Environmental
    Quality|Mandatory|Interior sound transmission (with note)|5.507.4.3||||| |(continued)
    DIVISION 5.5
    Environmental
    Quality|Mandatory|Ozone depletion and greenhouse gas reductions|5.508.1||||| |(continued)
    DIVISION 5.5
    Environmental
    Quality|Mandatory|Chlorofluorocarbons (CFCs)|5.508.1.1||||| |(continued)
    DIVISION 5.5
    Environmental
    Quality|Mandatory|Halons|5.508.1.2||||| |(continued)
    DIVISION 5.5
    Environmental
    Quality|Mandatory|Supermarket refrigerant leak reduction for retail food
    stores 8,000 square feet or more|5.508.2
    through
    5.508.2.6.3||||| |||END OF MANDATORY PROVISIONS||||||

    Documentation Author's / Responsible Designer's Declaration Statement
    □ Mandatory: I attest that this mandatory provisions checklist is accurate and complete.    		 Col2
    Signature: Signature:
    Company: Date:
    Address: License:
    City/State/Zip: Phone:

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    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    A5.602.1

    CALGreen VERIFICATION GUIDELINES

    TIER 1 CHECKLIST

    Application: This checklist shall be used for nonresidential projects that meet the following: new construction, or building additions of 1,000 square feet or greater, or building alterations with a permit valuation of $200,000 or more pursuant to Section 301.3, AND are adopting Tier 1 voluntary measures.

    Note: All applicable mandatory requirements in Chapter 5 shall be met prior to applying Tier 1 voluntary measures.

    Instructions:

    Comply with all Tier 1 prerequisite measures from the various categories shown on the table below.

    Add a “ Y ” to all mandatory and Tier 1 prerequisite measures in the appropriate columns.

    Select the required number of additional electives from those categories shown on the table below and add a “ Y ” on the selected elective and add an “ N ” on the rest.

  • CBC § 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:

  • CBC § 405.4 High relevance — show source text
    1. From Division A5.4,

    a. Comply with recycled content of 15 percent of materials based on estimated total cost, or use two products from Table A5.405.4 for at least 75 percent by cost in Section A5.405.4.1. b. Comply with the 80-percent reduction in construction and demolition waste in Section A5.408.3.1. c. Comply with three elective measures selected from this division.

    1. From Division A5.5,

    a. Comply with resilient flooring systems for 100 percent of resilient flooring in Section A5.504.4.7.1. Exception: Allowance may be permitted in Tier 2 for up to 5-percent specialty purpose flooring. b. Comply with thermal insulation meeting 2009 CHPS low-emitting materials list and no added formaldehyde in Section A5.504.4.8.1.

    c. Comply with three elective measures selected from this division. 6. Comply with three additional elective measures selected from any division.

    1 Cool roof is required for compliance with Tiers 1 and 2 and may be used to meet energy standards in Part 6, exceed energy standards and to mitigate heat island effect.

    A5.601.4 Compliance verification. Compliance with Section A5.601.2 or A5.601.3 shall be as required in Chapter 7 of this code. Compliance documentation shall be made part of the project record as required in Section 5.410.2 or 5.410.3.

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    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    A5.602

    CALGreen VERIFICATION GUIDELINES MANDATORY MEASURES CHECKLIST

    Application: This checklist shall be used for nonresidential projects that meet one of the following: new construction, building additions of 1,000 square feet or greater, or building alterations with a permit valuation of $200,000 or more pursuant to Section 301.3 AND do not trigger a Tier 1 or Tier 2 requirement:

    Y = Yes (section has been selected and/or included)

    — N/A = Not Applicable (code section does not apply to the project mainly used for additions and alterations) O = Other (provide explanation)

    [N] = New construction pursuant to Section 301.3

    [A ] = Additions and/or Alterations pursuant to Section 301.3

    CHAPTER 5
    DIVISIONS    		 Col2 SECTION TITLE CODE
    SECTION    		 Y N/A O PLAN SHEET,
    SPEC OR
    ATTACH
    DIVISION 5.1
    Planning and
    Design    		 Mandatory Deconstruction and reuse of existing structures,
    Scope with Exception    		 5.105.1
    DIVISION 5.1
    Planning and
    Design    		 Mandatory Reuse of existing building & Verification of compliance with
    note    		 5.105.2 and
    5.105.2.1
    DIVISION 5.1
    Planning and
    Design    		 Mandatory Storm water pollution prevention for projects that disturb less
    than 1 acre of land    		 5.106.
  • CBC § 120.0 High relevance — show source text

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    ALL OCCUPANCIES—GENERAL PROVISIONS

    ii. Compliance approaches. In order to comply with Part 6, newly constructed nonresidential buildings and hotels/motels that are mechanically heated or mechanically cooled must meet the requirements of: a. Mandatory measures: The applicable provisions of Sections 120.0 through 130.5; and

    b. Either:

    (i) Performance approach: Section 140.1; or (ii) Prescriptive approach: Sections 140.2 through 140.10. C. Unconditioned nonresidential buildings and process space. Sections 110.9, 110.10, 120.6, 130.0 through 130.5, 140.3(c), 140.6, 140.7 and 140.8 apply to all newly constructed unconditioned buildings and for process spaces within the scope of Section 100.0(a). D. Single-family buildings. i. Sections applicable. Sections 150.0 through 150.1 apply to newly constructed single-family buildings. ii. Compliance approaches. In order to comply with Part 6, newly constructed single-family buildings must meet the requirements of: a. Mandatory measures: The applicable provisions of Sections 110.0 through 110.10 and 150.0; and

    b. Either:

    (i) Performance approach: Sections 150.1(a) and (b); or (ii) Prescriptive approach: Sections 150.1(a) and (c). Exception to Section 100.0(e)2Diib: Seasonally occupied agricultural housing limited by state or federal agency contract to occupancy not more than 180 days in any calendar year. E. Multifamily Buildings . i. Sections applicable. Sections 160.0 through 170.2 apply to newly constructed multifamily buildings. ii. Compliance approaches. In order to comply with Part 6, newly constructed multifamily buildings must meet the requirements of: a. Mandatory measures: The applicable provisions of Sections 110.0 through 110.10, and 160.0; and

    b. Either:

    (i) Performance approach: Section 170.1; or (ii) Prescriptive approach: Section 170.2(a) through (f).

    F. Covered processes.

    i. Sections applicable. Sections 110.2, 120.3, 120.6, 140.9, and 141.1 apply to covered processes. ii. Compliance approaches. In order to comply with Part 6, covered processes must meet the requirements of: a. The applicable mandatory measures in Sections 110.2, 120.3 and 120.6; and

    b. Either:

    (i) The performance approach requirements of Section 140.1; or (ii) The prescriptive approach requirements of Section 140.9. 3. New construction in existing buildings (additions, alterations and repairs). A. Nonresidential and hotel/motel buildings. Section 141.0 applies to new construction in existing nonresidential, high-rise residential and hotel/motel buildings. New construction in existing buildings includes additions, alterations and repairs. Section 141.0 specifies requirements that uniquely apply to additions, alterations or repairs to existing buildings, and specify which requirements in other sections also apply. For alterations that change the occupancy classification of the building, the requirements specified in Section 141.0 apply to the occupancy after the alterations. B. **Single-family buildings.

Frequently asked questions

Do the A5 voluntary measures automatically apply to my addition?

No — Appendix A5 is voluntary at the state level and only becomes mandatory in a jurisdiction when the local government adopts it; however the appendix language and A5.203.1 are written to include additions and alterations in their scope when adopted § A5.601.1 § A5.203.1 .

My alteration has a permit valuation under $200,000 — do I ignore A5?

Alterations with permit valuation under $200,000 generally do not trigger the Tier checklists; however mandatory Chapter 5 measures may still apply to the altered area and some A5 voluntary items may be documented as N/A per the verification checklists § 301.3 and § A5.602.1 .

If my addition is 900 sq ft, can I still pursue Tier compliance?

Yes — an addition smaller than 1,000 sq ft may still adopt Tier measures voluntarily if the jurisdiction allows it; the appendix and checklists specify 1,000 sq ft as the practical Tier-checklist threshold but do not prohibit voluntary adoption where allowed locally § A5.602.1 .

Do A5 performance energy rules apply when no mechanical system is added?

A5.203.1 distinguishes buildings that include lighting and/or mechanical systems from those that do not; where lighting/mechanical systems are not part of the permit, certain performance subsections (e.g., parts of A5.203.1.2) may not apply § A5.203.1 .

How do I know which parts of the building the measures apply to?

Use § 301.3 — the code sections for additions and alterations apply only to the portions of the building being added or altered; check banners ([N] for new, [A] for additions/alterations) in the code to see the intended scope § 301.3 .

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