CALGreen · California Green Building Standards Code (CALGreen)

Recycled content, construction & demolition waste reduction and life‑cycle assessment options

CALGreen requires projects seeking enhanced performance to either show 10% (Tier 1) or 15% (Tier 2) of total material cost is recycled‑content (with calculation rules and product table options), divert **65%** (Tier 1) or **80%** (Tier 2) of nonhazardous C&D waste with verification, and offers LCA routes (including A5.409.4) to demonstrate reductions in GWP or other impacts; follow the specified equations, exclusions (structural frame), and verification worksheets when documenting compliance.

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Last reviewed: July 6, 2026

What the code requires — 2-4 sentences

In plain English: projects pursuing enhanced CALGreen performance must (1) meet minimum recycled content targets for permanently installed materials, (2) divert a specified percentage of nonhazardous construction & demolition (C&D) waste, and (3) may use a whole‑building Life Cycle Assessment (LCA) alternative or additional LCA metrics to demonstrate reduced impacts. The controlling sections are § A5.405.4.1 (recycled content calculation and methods) , § A5.408.3.1 (enhanced C&D diversion thresholds and verification) , and § A5.409.4 (LCA of additional impacts) .

Most important rule: to meet the recycled‑content requirement you must demonstrate a total Recycled Content Value (RCV) equal to 10% (Tier 1) or 15% (Tier 2) of the total material cost — calculated by the code equations and documented with the required worksheets and verification (§ A5.405.4.1).

Requirements in detail

Recycled content — what and how much

  • Tier thresholds:
    • Tier 1: 10% of total material cost (RCV) OR use two listed products meeting minimum recycled content to cover 75% by cost of that product category. § A5.405.4 (Tier 1 / Tier 2) .
    • Tier 2: 15% of total material cost (RCV) OR use three listed products meeting minimum recycled content to cover 75% by cost of that product category. § A5.405.4 (Tier 2) .
  • Exclusions: materials used as components of the structural frame (load‑bearing studs, joists, beams, columns, trusses, etc.) are excluded when calculating RCV. § A5.405.4 .
  • Calculation methods:
    • Simplified method: total material cost = building area × enforcing‑agency square‑foot valuation × 45% (or 45% of total project cost). Use Equation A5.4‑3A / A5.4‑3B. § A5.405.4.1 .
    • Detailed method: add estimated/actual costs of materials and assemblies (structure, enclosure, interior finishes); exclude fees, labor, appliances, furnishings. § A5.405.4.1 .
  • How to compute each material’s contribution (RCV_M):
    • RCV_M (dollars) = Material cost × RC_M (percent), where RC_M = postconsumer % + 0.5 × preconsumer %. See Equations A5.4‑6 / A5.4‑7. § A5.405.4.3 .
  • Prescriptive product minimums: the code provides a Table A5.405.4 with minimum recycled content levels for specific products (e.g., fiberglass insulation 30%, cellulose insulation 75%, drywall 4%, aggregate base 80%). Table A5.405.4 is a prescriptive route if using the product‑count option. § A5.405.4 / Table A5.405.4 .

Decision‑relevant table (quick reference)

Decision dimension Values / thresholds How to comply Code Reference
Recycled content target (Tier 1) 10% of total material cost Dollar RCV calculation or 2 products meeting Table A5.405.4 covering 75% by cost § A5.405.4 / § A5.405.4.1
Recycled content target (Tier 2) 15% of total material cost Dollar RCV calculation or 3 products meeting Table A5.405.4 covering 75% by cost § A5.405.4
Simplified material cost method 45% of total project cost Project SF × jurisdiction SF valuation × 45% § A5.405.4.1 (Eq A5.4‑3A/B)
Product prescriptive minima Example: Fiberglass insulation 30%, Cellulose 75%, Drywall 4% Use Table A5.405.4 or calculate RCV dollars Table A5.405.4
C&D diversion (Tier 1) 65% diversion of nonhazardous C&D waste Diversion to recycling/salvage, with verification § A5.408.3.1
C&D diversion (Tier 2)** 80% diversion Same as above; higher threshold § A5.408.3.1.1
LCA additional impacts 10% improvement in at least two listed impacts (e.g., fossil fuel depletion, eutrophication, smog) Cradle‑to‑grave LCA including operating energy, per ISO 14044 § A5.409.4 / § A5.409.4.1

Construction & demolition waste reduction (C&D)

  • Tier 1 requires diversion of at least 65% of nonhazardous C&D waste (recycle or salvage) generated on site; mixed recyclables sent to mixed‑waste processors must include a third‑party verified facility average diversion rate. § A5.408.3.1 .
  • Tier 2 increases that to 80% diversion. § A5.408.3.1.1 .
  • Verification: provide a completed waste management report or certification documentation from the waste management company. § A5.408.3.1.2 .
  • Exceptions (common): excavated soil and land‑clearing debris; alternate methods agreed with local agencies where diversion facilities do not exist; demolition waste governed by local ordinance or market conditions. § A5.408.3.1 (Exceptions) .

Whole‑building LCA options & additional impacts

  • The code allows voluntary LCA compliance options beyond the GWP reduction metric. § A5.409.4 requires a cradle‑to‑grave LCA, conducted per ISO 14044, including operating energy, demonstrating a minimum 10% improvement in at least two additional impact categories (choose from fossil fuel depletion, stratospheric ozone depletion, acidification, eutrophication, photochemical oxidants). § A5.409.4 / § A5.409.4.1 .
  • This LCA option can substitute for or be used in addition to prescriptive approaches (see cross‑references in Appendix A5). Software and data‑set requirements (ISO/EN compliance) and verification worksheets (WS‑9 etc.) are required when performing whole‑building LCAs. § A5.409.2.x and supporting worksheets are the verification path.

Exceptions & special cases

  • Structural frame materials are excluded from the recycled content RCV calculation — do not count studs, beams, columns, rafters, trusses, etc. § A5.405.4 .
  • Excavated soil, trees, land‑clearing debris and related material are excepted from C&D diversion thresholds. § A5.408.3.1 (Exceptions 1) .
  • Where local diversion or recycling facilities are unavailable, the enforcing agency may accept alternate waste reduction methods developed with local agencies. § A5.408.3.1 (Exception 2) .
  • For LCA references: projects that include building reuse have special baseline rules (reference baseline excludes reused elements; percent reductions must come from new elements) in the whole‑building LCA provisions. See A5.409.2 exceptions and verification rules.

Common mistakes

  • Treating the RCV target as a simple “percent of some materials” rather than percent of the total material cost (or failing to calculate total material cost per the code’s 45% simplified method or the detailed method). § A5.405.4.1 .
  • Counting structural frame components (studs, beams) toward recycled content — the code explicitly excludes them. § A5.405.4 .
  • Using mixed numeric measures (weight vs. volume) inconsistently when documenting diversion — the code requires calculating diverted amounts by weight or volume, but not both. (See related documentation and waste plan forms).
  • Failing to obtain or include third‑party verification for mixed‑waste processing diversion rates when relying on mixed‑waste processors. § A5.408.3.1 .
  • For LCAs: using different software/data‑sets for baseline vs. proposed building, or failing to use data sets compliant with ISO 14044 / ISO 21930 or EN 15804 per the whole‑building LCA verification notes. § A5.409.2.1 / A5.409.2.3

Worked example — Recycled content + C&D diversion (numbers)

Scenario: New office building, 20,000 ft². Enforcing‑agency square‑foot valuation = $200/ft². Project total estimated cost = area × valuation = 20,000 × $200 = $4,000,000.

  1. Determine Total material cost using the simplified method:

    • Total material cost = Project SF × SF valuation × 45% = $4,000,000 × 45% = $1,800,000. § A5.405.4.1 (Eq A5.4‑3A/B) .

  2. Tier 1 recycled content target (10%):

    • Required RCV (dollars) = Total material cost × 10% = $1,800,000 × 0.10 = $180,000. § A5.405.4 (Eq A5.4‑1) .

  3. How to meet $180,000 RCV:

    • Option A (dollar method): Select materials with known postconsumer/preconsumer % and compute RCV_M = Material cost × (postconsumer% + 0.5 × preconsumer%). Sum all RCV_M to reach ≥ $180,000. § A5.405.4.3 (Eqs A5.4‑6/A5.4‑7) .
    • Option B (product prescriptive): Use two products from Table A5.405.4 meeting minimum recycled content that together represent ≥ 75% by cost of their category (e.g., use cellulose insulation at 75% recycled content and aggregate base at 80% to cover the majority of those material costs). § A5.405.4 / Table A5.405.4 .

  4. C&D diversion example:

    • Assume total nonhazardous C&D generated = 50 tons. To meet Tier 1 (65%), you must divert at least 50 × 0.65 = 32.5 tons to recycle/salvage. Provide a waste management report or hauler certification showing diversion and (if using mixed‑waste processors) a third‑party verified facility diversion rate. § A5.408.3.1 / A5.408.3.1.2 .

  5. LCA alternative (if pursued):

    • If performing the A5.409.4 route, you must run a cradle‑to‑grave LCA including operating energy and demonstrate ≥ 10% improvement in at least two selected impacts (e.g., fossil fuel depletion and eutrophication) versus the reference baseline, using ISO‑compliant software/data. § A5.409.4 / § A5.409.4.1 .

Related provisions

  • § A5.405.4 — Recycled content general rule and alternatives (Tier 1/2)
  • § A5.405.4.1 — Total material cost: simplified and detailed methods; Eq A5.4‑3A/B
  • Table A5.405.4 — Minimum recycled content levels for specific products (prescriptive path)
  • § A5.408.3.1 — Enhanced construction waste reduction (65% diversion) and verification requirements
  • § A5.408.3.1.1 — Tier 2 (80% diversion)
  • § A5.408.3.1.2 — Verification documentation (waste management report or certification)
  • § A5.409.2 / A5.409.2.1 / A5.409.2.3 — Whole building LCA scope, GWP reduction requirements, software/data‑set/verification guidance (baseline rules, worksheets WS‑9, WS‑7)
  • § A5.409.4 / A5.409.4.1 — Whole building LCA of additional impacts (10% improvement in two impacts)

Code references

Grounded in the retrieved California Green Building Standards Code (CALGreen) — click a citation to read the verbatim passage:

  • CALGreen § 5.2 High relevance — show source text

    1**
    Planning and Design||1 additional Elective from Division A5.1|3 additional Electives from Division A5.1| |DIVISION 5.2
    Energy Efficiency|Energy Performance2a, 2b|Outdoor lighting power 90%
    of Part 6 allowance|Outdoor lighting power 90%
    of Part 6 allowance| |||If applicable, solar water-heating system
    with minimum solar savings fraction of 0.15|If applicable, solar water-heating system
    with minimum solar savings fraction of 0.15| |||Warehouse door seals|Warehouse door seals| |||Comply with day lighting requirements|Comply with day lighting requirements| |||Exhaust heat recovery|Exhaust heat recovery| |||Energy Budget 95% or 90%
    of Part 6 calculated value of allowance|Energy Budget 90% or 85%
    of Part 6 calculated value of allowance| |DIVISION 5.3
    Water Efficiency
    and Conservation|Indoor Water Use|12% Savings|20% Savings| |DIVISION 5.3
    Water Efficiency
    and Conservation||1 additional Elective from Division A5.3|3 additional Electives from Division A5.3| |DIVISION 5.4
    Material Conservation
    and Resource Efficiency3|Construction Waste Reduction|At least 65% reduction|At least 80% reduction| |DIVISION 5.4
    Material Conservation
    and Resource Efficiency3|Recycled Content|Utilize recycled content materials for
    10% of total material cost|Utilize recycled content materials for
    15% of total material cost| |DIVISION 5.4
    Material Conservation
    and Resource Efficiency3|Cradle-to-Grave
    Whole Building Life Cycle
    Assessment|See Section A5.409.1, Section A5.409.2
    and Section A5.409.2.3 requirements|See Section A5.409.1, Section A5.409.2
    and Section A5.409.2.3 requirements| |DIVISION 5.4
    Material Conservation
    and Resource Efficiency3|Product GWP compliance –
    prescriptive path|See Section A5.409.1, Section A5.409.2
    and Section A5.409.2.3 requirements|See Section A5.409.1, Section A5.409.2
    and Section A5.409.2.3 requirements| |DIVISION 5.4
    Material Conservation
    and Resource Efficiency3||1 additional Elective
    from Division A5.4|3 additional Electives
    from Division A5.4| |DIVISION 5.5
    Environmental Quality|Low-VOC Resilient Flooring|90% of flooring meets VOC limits|100% of flooring meets VOC limits1| |DIVISION 5.5
    Environmental Quality|Low-VOC Thermal Insulation|Comply with VOC limits|Install no-added formaldehyde
    insulation and comply with VOC limits| |DIVISION 5.5
    Environmental Quality||1 additional Elective from Division A5.5|3 additional Electives from Division A5.

  • CALGreen § 5.409.2 High relevance — show source text

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-29

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    1. Projects consisting of newly constructed building(s) with a combined floor area of less than 50,000 square feet shall comply with either Section 5.409.2 or Section 5.409.3 for Tier 1 compliance, and either Section A5.409.2.1 or A5.409.3 Tier 1 requirements for Tier 2 compliance.
    2. Alteration(s) to existing building(s) where the aggregate floor area is less than 50,000 square feet shall comply with either Section 5.105.2, Section 5.409.2, or Section 5.409.3 for Tier 1 compliance, and either Section A5.105.2.1, Section A5.409.2.1, or Section A5.409.3 Tier 1 requirements for Tier 2 compliance.
    3. Addition(s) to an existing building where the total floor area combined with the existing building(s) is less than 50,000 square feet shall comply with either Section 5.105.2, Section 5.409.2, or Section 5.409.3 for Tier 1 compliance, and either Section A5.105.2.1, Section A5.409.2.1, or Section A5.409.3 Tier 1 requirements for Tier 2 compliance. Exception: Combined addition(s) to existing building(s) of two times the area or more of the existing building(s) is not eligible to meet compliance with Section 5.105.2 or Section A5.105.2.

    A5.409.2 Whole building life cycle assessment. Projects shall meet the minimum requirements of Section A5.409.2 for Tier 1 or Tier 2 compliance.

    A5.409.2.1 Tier 1. Projects shall conduct a cradle-to-grave whole building life cycle assessment meeting the requirements of Section 5.409.2 and performed in accordance with ISO 14040 and 14044, excluding operating energy, demonstrating a minimum 15-percent reduction in global warming potential (GWP) as compared to a reference baseline building of similar size, function, complexity, type of construction, material specification, and location that meets the requirements of all parts of the California Building Standards Code currently in effect. Software used to conduct the whole building life cycle assessment, including reference baseline building, shall have a data set compliant with ISO 14044, and ISO 21930 or EN 15804, and the software shall conform to ISO 21931 and/or EN 15978. The software tools and data sets shall be the same for evaluation of both the baseline building and the proposed building.

    Exception: For projects that include building reuse, the reference baseline building shall exclude the reused elements. The percent reduction in GWP shall be achieved through the design and construction of new project elements.

    **A5.409.2.2 Tier 2.

  • CALGreen § 601.3.4 High relevance — show source text

    A5.601.3.4 Voluntary measures for Tier 2. In addition to the provisions of Sections A5.601.3.1 and A5.601.3.3 above, compliance with the following voluntary measures from Appendix A5 is required for Tier 2:

    1. From Division A5.1, a. Comply with the designated parking requirements for fuel efficient vehicles for a minimum of 50 percent of parking capacity per Section A5.106.5.1. b. Electric vehicle (EV) charging [N] and Table A5.106.5.3.2 with footnotes. c. Comply with thermal emittance, solar reflectance or SRI values for cool roofs in Section A5.106.11.2 and Table A5.106.11.2.3. [1]

    d. Comply with three elective measures selected from this division.

    APPENDIX A5-42 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    1. From Division A5.2 comply with TWO of the following:

    2. Outdoor lighting as described in A5.203.1.1.1.

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

    4. Warehouse Dock Seal Doors A5.203.1.1.3.

    5. Daylight Design Power Adjustments 5.203.1.1.4.

    6. Exhaust Air Heat Recovery A5.203.1.1.5.

    7. From Division A5.3,

    a. Comply with the 20-percent reduction for indoor potable water use in Section A5.303.2.3.2. b. Comply with three elective measures selected from this division.

    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.

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-43

  • CALGreen § 408.3.1 High relevance — show source text

    SECTION A5.408—CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RECYCLING

    A5.408.3.1 Enhanced construction waste reduction – Tier 1. Divert to recycle or salvage at least 65 percent of nonhazardous construction and demolition waste generated at the site. Any mixed recyclables that are sent to mixed-waste recycling facilities shall include a qualified third party verified facility average diversion rate. Verification of diversion rates shall meet minimum certification eligibility guidelines, acceptable to the local enforcing agency.

    A5.408.3.1.1 Enhanced construction waste reduction – Tier 2. Divert to recycle or salvage at least 80 percent of nonhazardous construction and demolition waste generated at the site.

    A5.408.3.1.2 Verification of compliance. A copy of the completed waste management report or documentation of certification of the waste management company utilized shall be provided.

    Exceptions:

    1. Excavated soil and land-clearing debris.
    2. Alternate waste reduction methods developed by working with local agencies if diversion or recycle facilities capable of compliance with this item do not exist.
    3. Demolition waste meeting local ordinance or calculated in consideration of local recycling facilities and markets.

    SECTION A5.409—LIFE CYCLE ASSESSMENT

    A5.409.1 Scope. Projects with the area limits specified shall comply with Section A5.409.1 to achieve Tier 1 or Tier 2 compliance. Projects of any size shall comply with Section A5.409.5 to achieve Tier 2 compliance.

    1. Projects consisting of newly constructed building(s) with a combined floor area of 50,000 square feet or greater shall comply with either Section A5.409.2 or Section A5.409.3.

    2. Alteration(s) to existing building(s) where the combined altered floor area is 50,000 square feet or greater shall comply with either Section A5.105.2, Section A5.409.2 or Section A5.409.3.

    3. Addition(s) to existing building(s) where the total floor area combined with the existing building(s) is 50,000 square feet or greater shall comply with either Section A5.105.2, Section A5.409.2 or Section A5.409.3. Exception: Combined addition(s) to existing building(s) of two times the area or more of the existing building(s) is not eligible to meet compliance with Section A5.105.2.

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-29

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    1. Projects consisting of newly constructed building(s) with a combined floor area of less than 50,000 square feet shall comply with either Section 5.409.2 or Section 5.409.3 for Tier 1 compliance, and either Section A5.409.2.1 or A5.409.3 Tier 1 requirements for Tier 2 compliance.
    2. Alteration(s) to existing building(s) where the aggregate floor area is less than 50,000 square feet shall comply with either Section 5.105.2, Section 5.409.2, or Section 5.409.3 for Tier 1 compliance, and either Section A5.105.2.1, Section A5.409.2.1, or Section A5.409.3 Tier 1 requirements for Tier 2 compliance.
  • CALGreen § 5.409.2 High relevance — show source text

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL

    WORKSHEET (WS-9) Section 5.409.2 and Section A5.409.2 WHOLE BUILDING LIFE CYCLE ASSESSMENT

    User input Units
    m2
    Upfront Carbon Col2 Col3 Use Phase End of Life Total
    A1-3 A4 A5 B1-5 C1-4
    Percent Reduction Col2
    Mandatory
    Tier 1
    Tier 2
    Upfront Carbon Col2 Col3 Use Phase End of Life Total
    A1-3 A4 A5 B1-5 C1-4

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 8-7

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL

    Construction Waste Management (CWM) Plan

    Note: This sample form may be used to assist in documenting compliance with the waste management plan.

    Project Name:___________________________________________________

    Job #:__________________________________________________________

    Project Manager: ________________________________________________ Waste Hauling Company: _________________________________________

    Contact Name: __________________________________________________

    All Subcontractors shall comply with the project’s Construction Waste Management Plan. All Subcontractor foremen shall sign the CWM Plan Acknowledgment Sheet.

    Subcontractors who fail to comply with the Waste Management Plan will be subject to backcharges or withholding of payment, as deemed appropriate. For instance, Subcontractors who contaminate debris boxes that have been designated for a single material type will be subject to backcharge or withheld payment, as deemed appropriate.

    1. The project’s overall rate of waste diversion will be ____ %.
    2. This project shall generate the least amount of waste possible by planning and ordering carefully, following all proper storage and handling procedures to reduce broken and damaged materials and reusing materials whenever possible. The majority of the waste that is generated on this jobsite will be diverted from the landfill and recycled for other use.
    3. Spreadsheet 1, enclosed, identifies the waste materials that will be generated on this project, the diversion strategy for each waste type and the anticipated diversion rate.
    4. Waste prevention and recycling activities will be discussed at the beginning of weekly subcontractor meetings. As each new subcontractor comes on-site, the WMP Coordinator will present him/her with a copy of the CWM Plan and provide a tour of the jobsite to identify materials to be salvaged and the procedures for handling jobsite debris. All Subcontractor foremen will acknowledge in writing that they have read and will abide by the CWM Plan. Subcontractor Acknowledgment Sheet enclosed. The CWM Plan will be posted at the jobsite trailer.
  • CALGreen § 409.2 High relevance — show source text

    Responsible Designer’s Declaration Statement:

    I attest that the Whole Building Life Cycle Analysis has been performed according to the requirements of Section A5.409.2 and has met the minimum 15 percent (Tier 1) or 20 percent (Tier 2) reduction in global warming potential as compared to a reference baseline building of similar size, function, complexity, type of construction, material specification, and location that meets the requirements of the California Energy Code currently in effect. Furthermore, I will ensure during construction that the material specifications will be reviewed for substantial conformance with the life cycle assessment indicated on the approved plans so at the close of construction the minimum reduction in global warming potential is thereby secured.

    Signature: Col2
    Company: Date:
    Address: License:
    City/State/Zip: Phone:

    WORKSHEET (WS-8) [BSC-CG] Section A5.409.3 PRODUCT GWP COMPLIANCE—PRESCRIPTIVE PATH

    Designer’s Declaration Statement:

    I attest that prescriptive compliance has been performed according to the requirements of Section A5.409.3 and products have met the maximum acceptable GWP value for the products listed in Table A5.409.3 for either Tier 1 or Tier 2. Furthermore, I will ensure during construction that any material specification substitution will be reviewed for substantial conformance with the requirements of Section A5.409.3 so at the close of construction the minimum 15 percent reduction in global warming potential is thereby secured.

    Signature: Col2
    Company: Date:
    Address: License:
    City/State/Zip: Phone:

    8-6 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL

    WORKSHEET (WS-9) Section 5.409.2 and Section A5.409.2 WHOLE BUILDING LIFE CYCLE ASSESSMENT

    User input Units
    m2
    Upfront Carbon Col2 Col3 Use Phase End of Life Total
    A1-3 A4 A5 B1-5 C1-4
    Percent Reduction Col2
    Mandatory
    Tier 1
    Tier 2
    Upfront Carbon Col2 Col3 Use Phase End of Life Total
    A1-3 A4 A5 B1-5 C1-4

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 8-7

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL

    Construction Waste Management (CWM) Plan

    Note: This sample form may be used to assist in documenting compliance with the waste management plan.

    Project Name:___________________________________________________

    Job #:__________________________________________________________

  • CALGreen § 405.5.3.3 High relevance — show source text

    A5.405.5.3.3 High strength concrete. Concrete elements designed to reduce their total size compared to standard 3,000 psi concrete, thereby reducing the total volume of cement, aggregate and water used on the project.

    A5.405.5.3.4 Later ages of maturity. An increase in the age of maturity of testing for determining compressive strength for acceptance of concrete from the current 28 days to 42 or 56 days, in compliance with ASTM C31/C31M.

    A5.405.5.3.5 Returned fresh concrete. The use of returned fresh concrete in compliance with ASTM C1798/C1798M or Caltrans Section 90-9.

    SECTION A5.406—ENHANCED DURABILITY AND REDUCED MAINTENANCE

    A5.406.1 Choice of materials. Compared to other products in a given product category, choose materials proven to be characterized by one or more of the following.

    A5.406.1.1 Service life. Select materials for longevity and minimal deterioration under conditions of use.

    A5.406.1.2 Reduced maintenance. Select materials that require little, if any, finishing. For those with surface protection, choose materials that do not require frequent applications of toxic or malodorous finishes.

    A5.406.1.3 Recyclability. Select materials that can be reused or recycled at the end of their service life in the project.

    SECTION A5.408—CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RECYCLING

    A5.408.3.1 Enhanced construction waste reduction – Tier 1. Divert to recycle or salvage at least 65 percent of nonhazardous construction and demolition waste generated at the site. Any mixed recyclables that are sent to mixed-waste recycling facilities shall include a qualified third party verified facility average diversion rate. Verification of diversion rates shall meet minimum certification eligibility guidelines, acceptable to the local enforcing agency.

    A5.408.3.1.1 Enhanced construction waste reduction – Tier 2. Divert to recycle or salvage at least 80 percent of nonhazardous construction and demolition waste generated at the site.

    A5.408.3.1.2 Verification of compliance. A copy of the completed waste management report or documentation of certification of the waste management company utilized shall be provided.

    Exceptions:

    1. Excavated soil and land-clearing debris.
    2. Alternate waste reduction methods developed by working with local agencies if diversion or recycle facilities capable of compliance with this item do not exist.
    3. Demolition waste meeting local ordinance or calculated in consideration of local recycling facilities and markets.

    SECTION A5.409—LIFE CYCLE ASSESSMENT

    A5.409.1 Scope. Projects with the area limits specified shall comply with Section A5.409.1 to achieve Tier 1 or Tier 2 compliance. Projects of any size shall comply with Section A5.409.5 to achieve Tier 2 compliance.

    1. Projects consisting of newly constructed building(s) with a combined floor area of 50,000 square feet or greater shall comply with either Section A5.409.2 or Section A5.409.3.
  • CALGreen § 405.2.2 High relevance — show source text

    Manufacturer’s fiber procurement system that has been audited by an approved agency as compliant with the provisions of ASTM D7612 as a responsible or certified source.

    A5.405.2.2 Rapidly renewable materials. Use materials made from plants harvested within a ten-year cycle for at least 2.5 percent of total materials value, based on estimated cost.

    A5.405.3 Reused materials. Use salvaged, refurbished, refinished or reused materials for a minimum of 5 percent of the total value, based on estimated cost of materials on the project. Provide documentation as to the respective values.

    Note: Sources of some reused materials can be found at CalRecycle’s https://www.calrecycle.ca.gov/. See also Appendix A5, Divi- sion A5.1, Section A5.105.1 for on-site materials reuse.

    A5.405.4 Recycled content. Use materials, equivalent in performance to virgin materials with a total (combined) recycled content value (RCV) of:

    Tier 1. The RCV shall not be less than 10 percent of the total material cost of the project, or use two products which meet the minimum recycled content levels in Table A5.405.4 for at least 75%, by cost, of all products in that category in the project.

    (Equation A5. 4-1) Required Total RCV (dollars) = Total Material Cost (dollars) × 10 percent

    Tier 2. The RCV shall not be less than 15 percent of the total material cost of the project, or use three products which meet the minimum recycled content levels in Table A5.405.4 for at least 75%, by cost, of all products in that category in the project.

    (Equation A5. 4-2) Required Total RCV (dollars) = Total Material Cost (dollars) × 15 percent

    For the purposes of this section, materials used as components of the structural frame shall not be used to calculate recycled content. The structural frame includes the load bearing structural elements such as wall studs, plates, sills, columns, beams, girders, joists, rafters and trusses.

    Notes:

    1. Sample forms which allow user input and automatic calculation are located at www.hcd.ca.gov/ CALGreen.html and may be used to simplify documenting compliance with this section and for calculating recycled content value of materials or assembly products.
    2. Sources and recycled content of some recycled materials can be obtained from CalRecycle if not provided by the manufacturer.
    TABLE A5.405.4—MINIMUM RECYCLED CONTENT LEVELS Col2 Col3
    MATERIAL/PRODUCT TYPE MINIMUM TOTAL RECYCLED CONTENT MINIMUM POST-CONSUMER RECYCLED
    CONTENT
    Insulation, fiberglass 30% 30%
    Insulation, cellulose 75% 75%
    Exterior Paint, latex 50% 50%
    Carpet, nylon 10% 10%
    Compost 80% 80%
    Mulch 80% 80%
    Acoustical ceiling panels 60% —
    Drywall, gypsum 4% 4%
    Aggregate base 80% 80%

    APPENDIX A5-26 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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

    a. Comply with recycled content of 10 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. b. Comply with the 65-percent reduction in construction and demolition waste in Section A5.408.3.1. c. Comply with one elective measure selected from this division.

    1. From Division A5.5,

    a. Comply with resilient flooring systems for 90 percent of resilient flooring in Section A5.504.4.7. b. Comply with thermal insulation meeting 2009 CHPS low-emitting materials list in Section A5.504.4.8. c. Comply with one elective measure selected from this division. 6. Comply with one additional elective measure 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.

    A5.601.3 CALGreen Tier 2.

    A5.601.3.1 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.

    A5.601.3.2 Energy performance. For the purposes of mandatory energy efficiency standards in this code, the California Energy Commission will continue to adopt mandatory standards.

    A5.601.3.3 Tier 2. Comply with the energy efficiency requirements in Section A5.203.1.1 and Section A5.203.1.2.2.

    A5.601.3.4 Voluntary measures for Tier 2. In addition to the provisions of Sections A5.601.3.1 and A5.601.3.3 above, compliance with the following voluntary measures from Appendix A5 is required for Tier 2:

    1. From Division A5.1, a. Comply with the designated parking requirements for fuel efficient vehicles for a minimum of 50 percent of parking capacity per Section A5.106.5.1. b. Electric vehicle (EV) charging [N] and Table A5.106.5.3.2 with footnotes. c. Comply with thermal emittance, solar reflectance or SRI values for cool roofs in Section A5.106.11.2 and Table A5.106.11.2.3. [1]

    d. Comply with three elective measures selected from this division.

    APPENDIX A5-42 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    1. From Division A5.2 comply with TWO of the following:

    2. Outdoor lighting as described in A5.203.1.1.1.

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

    4. Warehouse Dock Seal Doors A5.203.1.1.3.

    5. Daylight Design Power Adjustments 5.203.1.1.4.

    6. Exhaust Air Heat Recovery A5.203.1.1.5.

    7. From Division A5.3,

  • CALGreen § 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.

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-43

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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.
  • CALGreen § 407.6 High relevance — show source text

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    APPENDIX A4 — RESIDENTIAL VOLUNTARY MEASURES

    A4.407.6 Door protection. Exterior doors to the dwelling are covered to prevent water intrusion by one or more of the following:

    1. An awning at least 4 feet in depth is installed.

    2. The door is protected by a roof overhang at least 4 feet in depth.

    3. The door is recessed at least 4 feet.

    4. Other methods which provide equivalent protection.

    A4.407.7 Roof overhangs. A permanent overhang or awning at least 2 feet in depth is provided at all exterior walls.

    SECTION A4.408—CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RECYCLING

    A4.408.1 Enhanced construction waste reduction. Nonhazardous construction and demolition debris generated at the site is diverted to recycle or salvage in compliance with one of the following:

    Tier 1. At least a 65 percent reduction. Any mixed recyclables that are sent to mixed-waste recycling facilities shall include a qualified third party verified facility average diversion rate. Verification of diversion rates shall meet minimum certification eligibility guidelines, acceptable to the local enforcing agency.

    Tier 2. At least a 75 percent reduction with a third-party verification as required for Tier 1.

    Exceptions:

    1. Equivalent or alternative waste reduction methods are developed by working with local agencies if diversion or recycle facilities capable of compliance with this item do not exist.
    2. The enforcing agency may make exceptions to the requirements of this section when jobsites are located in areas beyond the haul boundaries of the diversion facility.

    A4.408.1.1 Documentation. Documentation shall be provided to the enforcing agency which demonstrates compliance with this section. Documentation shall be in compliance with Section 4.408.5.

    SECTION A4.409—LIFE CYCLE ASSESSMENT (RESERVED)

    SECTION A4.410—BUILDING MAINTENANCE AND OPERATION (RESERVED)

    SECTION A4.411 —INNOVATIVE CONCEPTS AND LOCAL ENVIRONMENTAL CONDITIONS

    A4.411.1 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.

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    A4 RESIDENTIAL VOLUNTARY MEASURES

    DIVISION A4.5 – ENVIRONMENTAL QUALITY

    SECTION A4.501—GENERAL (RESERVED)

    SECTION A4.502—DEFINITIONS

    A4.502.1 Definitions. The following terms are defined in Chapter 2.

    MERV.

    NO ADDED FORMALDEHYDE (NAF) BASED RESINS.

    ULTRA-LOW EMITTING FORMALDEHYDE (ULEF) RESINS.

    SECTION A4.503—FIREPLACES (RESERVED)

    SECTION A4.504—POLLUTANT CONTROL

  • CALGreen § 401.1 High relevance — show source text

    DIVISION A6.4 – MATERIAL CONSERVATION AND RESOURCE EFFICIENCY

    SECTION A6.401—GENERAL

    A6.401.1 Scope. The provisions of this chapter shall outline means of achieving material conservation and resource efficiency through reuse of existing building stock and materials; use of recycled, regional, rapidly renewable and certified wood materials; and employment of techniques to reduce pollution through recycling of materials.

    SECTION A6.407 [OSHPD 1, 2 & 4]—WATER RESISTANCE AND MOISTURE MANAGEMENT

    A6.407.3 Weather protection. Provide a weather-resistant exterior wall and foundation envelope as required by California Building Code Section 1403.2 and California Energy Code Section 150, manufacturer’s installation instructions or local ordinance, whichever is more stringent.

    A6.407.4 Moisture control. Employ moisture control measures by the following methods.

    A6.407.4.1 Sprinklers. Design and maintain landscape irrigation systems to prevent spray on structures.

    A6.407.4.2 Entries and openings. Design exterior entries and/or openings subject to foot traffic or wind-driven rain to prevent water intrusion into buildings.

    Notes:

    1. Use features such as overhangs and recesses and flashings integrated with a drainage plane.

    APPENDIX A6.1-32 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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    APPENDIX A6.1 — VOLUNTARY STANDARDS FOR HEALTH FACILITIES [OSHPD 1, 2 & 4]

    1. Use nonabsorbent floor and wall finishes within at least two feet around and perpendicular to such openings.

    SECTION A6.408—CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RECYCLING

    A6.408.5 Construction waste diversion. [OSHPD 1, 2 & 4] Establish a construction waste management plan for the diverted materials or meet local construction and demolition waste management ordinance, whichever is more stringent.

    A6.408.6 Construction waste reduction of at least 50 percent. [OSHPD 1, 2 & 4] Recycle and/or salvage for reuse a minimum of 50 percent of the nonhazardous construction and demolition debris or meet a local construction and demolition waste management ordinance, whichever is more stringent. Calculate the amount of materials diverted by weight or volume, but not by both.

    Exceptions:

    1. Excavated soil and land-clearing debris.
    2. Alternate waste reduction methods developed by working with local agencies if diversion or recycle facilities capable of compliance with this item do not exist.

    A6.408.7 Excavated soil and land clearing debris. [OSHPD 1, 2 & 4] 100 percent of trees, stumps, rocks and associated vegetation and soils resulting primarily from land clearing shall be reused or recycled. For a phased project, such material may be stockpiled on site until the storage site is developed.

    SECTION A6.410—BUILDING MAINTENANCE AND OPERATION

    A6.410.6 Recycling by occupants. [OSHPD 1, 2 & 4] Provide readily accessible areas that serve the entire building and are identified for the depositing, storage and collection of nonhazardous materials for recycling, including (at a minimum) paper, corrugated cardboard, glass, plastics and metals.

  • CALGreen § 5.4 Medium relevance — show source text

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    CHAPTER 5 DIVISIONS Col2 Col3 SECTION TITLE CODE
    SECTION    		 Y N O PLAN SHEET,
    SPEC OR
    ATTACH
    (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency    		 Select Three
    (cont’d)    		 Elective Concrete manufacture, Recycled aggregates A5.405.5.3,
    A5.405.5.3.1
    (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency    		 Select Three
    (cont’d)    		 Elective Concrete manufacture, Mixing water A5.405.5.3,
    A5.405.5.3.2
    (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency    		 Select Three
    (cont’d)    		 Elective Concrete manufacture, High strength concrete A5.405.5.3,
    A5.405.5.3.3
    (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency    		 Select Three
    (cont’d)    		 Elective Concrete manufacture, Later ages of maturity A5.405.5.3,
    A5.405.5.3.4
    (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency    		 Select Three
    (cont’d)    		 Elective Concrete manufacture, Returned fresh concrete A5.405.5.3,
    A5.405.5.3.5
    (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency    		 Select Three
    (cont’d)    		 Elective Choice of materials A5.406.1, A5.406.1.1,
    A5.406.1.2, A5.406.1.3
    (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency    		 Select Three
    (cont’d)    		 Elective Life cycle assessment: Scope with exceptions, Whole
    building life cycle assessment, Tier 2 with Exception,
    Verification of compliance    		 A5.409.1, A5.409.2,
    A5.409.2.2, A5.409.2.3
    (continued)
    **DIVISION 5.
  • CALGreen § 5.408.1.1 Medium relevance — show source text

    4**
    Material
    Conservation
    and Resource
    Efficiency
    (continued)|Mandatory|Construction waste management—comply with either:
    Sections 5.408.1.1, 5.408.1.2, 5.408.1.3 or more stringent local
    ordinance|5.408.1.1,
    5.408.1.2,
    5.408.1.3|||||

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    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    CHAPTER 5
    DIVISIONS    		 Col2 Col3 SECTION TITLE CODE
    SECTION    		 Y N O PLAN SHEET,
    SPEC OR
    ATTACH
    (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    Select One Elective    		 (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    Select One Elective    		 Mandatory Construction waste management: documentation 5.408.1.4
    (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    Select One Elective    		 (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    Select One Elective    		 Mandatory Universal waste [A] 5.408.2
    (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    Select One Elective    		 (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    Select One Elective    		 Mandatory Excavated soil and land clearing debris (100% reuse or
    recycle) with Exception and Notes    		 5.408.3
    (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    Select One Elective    		 (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    Select One Elective    		 Mandatory Life Cycle Assessment, Scope, Whole building life cycle
    assessment with Notes, Building components, Reference
    study period, and Verification of compliance    		 5.409.1, 5.409.2,
    5.409.2.1, 5.409.2.2
    _and 5.409.2.
  • CALGreen § 401.1 Medium relevance — show source text

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-23

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    APPENDIX A5-24 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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    A5 NONRESIDENTIAL VOLUNTARY MEASURES

    DIVISION A5.4 – MATERIAL CONSERVATION AND RESOURCE EFFICIENCY

    SECTION A5.401—GENERAL

    A5.401.1 Scope. The provisions of this chapter specify the requirements of achieving enhanced compliance with material conservation, resource efficiency, and greenhouse gas (GHG) emissions reduction through reuse of existing building stock and materials; use of recycled, regional, rapidly renewable and certified wood materials; and employment of techniques to reduce pollution through recycling of materials.

    SECTION A5.402—DEFINITIONS

    A5.402.1 Definitions. The following terms are defined in Chapter 2.

    BUILDING COMMISSIONING.

    BUY CLEAN CALIFORNIA ACT (BCCA).

    CRADLE-TO-GRAVE.

    EMBODIED ENERGY.

    EUTROPHICATION.

    LIFE CYCLE ASSESSMENT (LCA).

    LIFE CYCLE INVENTORY (LCI).

    OVE.

    POSTCONSUMER CONTENT.

    PRECONSUMER (or POSTINDUSTRIAL) CONTENT.

    RECYCLED CONTENT.

    RECYCLED CONTENT VALUE (RCV).

    REFERENCE STUDY PERIOD.

    TYPE III ENVIRONMENTAL PRODUCT DECLARATION (EPD).

    FACTORY-SPECIFIC EPD.

    INDUSTRY-WIDE EPD (IW-EPD).

    PRODUCT-SPECIFIC EPD.

    SECTION A5.403—FOUNDATION SYSTEMS (RESERVED)

    SECTION A5.404—EFFICIENT FRAMING TECHNIQUES

    A5.404.1 Wood framing. Employ advanced wood framing techniques or OVE, as recommended by the US Department of Energy’s Office of Building Technology, State and Community Programs and as permitted by the enforcing agency.

    A5.404.1.1 Structural or fire-resistance integrity. The OVE selected shall not conflict with structural framing methods or firerated assemblies required by the California Building Code.

    A5.404.1.2 Framing specifications. Advanced framing techniques include the following:

    1. Building design using 2-foot modules;
    2. Spacing wall studs up to 24 inches on center;
    3. Spacing floor and roof framing members up to 24 inches on center;
    4. Using 2-stud corner framing and drywall clips or scrap lumber for drywall backing;
    5. Eliminating solid headers in non-load-bearing walls;
    6. Using in-line framing, aligning floor, wall and roof framing members vertically for direct transfer of loads; and
    7. Using single lumber headers and top plates where appropriate.

    Note: Additional information can be obtained from the US DOE Energy Efficiency and Renewable Energy (EERE) website.

    SECTION A5.405—MATERIAL SOURCES

  • CALGreen § 409.4 Medium relevance — show source text

    A5.409.4 Whole building life cycle assessment of additional impacts. Maintaining compliance with the requirements of Section 5.409.2, conduct a cradle-to-grave whole building life cycle assessment performed in accordance with ISO 14044, including operating energy, and demonstrating a minimum 10-percent improvement for a minimum of two additional impacts listed in Section A5.409.4.1, as compared to a reference baseline building of similar size, function, complexity, type of construction, material specification, location and operating energy performance that meets the requirements of the California Energy Code currently in effect.

    A5.409.4.1 Impacts to be considered. Select from the following impacts in the assessment:

    1. Fossil fuel depletion.

    2. Stratospheric ozone depletion.

    3. Acidification of land and water sources.

    4. Eutrophication.

    5. Photochemical oxidants (smog).

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-31

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    APPENDIX A5-32 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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    CALIFORNIA GREEN BUILDING STANDARDS CODE – MATRIX ADOPTION TABLE

    APPENDIX A5 – NONRESIDENTIAL VOLUNTARY MEASURES

    DIVISION A5.5 – ENVIRONMENTAL QUALITY

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

    Adopting agency BSC BSC-
    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    		 X
    Chapter/Section
    A5.507.5 † X

    The state agency does not adopt sections identified by the following symbol: †.

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-33

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    APPENDIX A5-34 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

  • CALGreen § 5.4 Medium relevance — show source text

    3||||| |DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    (continued)|Mandatory|Life Cycle Assessment, Scope, Product GWP compliance –
    prescriptive path, 5.409.3.1 with Exception and Exception
    EQUATION, Verification of compliance and Product GWP
    Limits Table with Footnotes|5.409.1,
    5.409.3,
    5.409.3.1,
    5.409.3.2 and
    Table 5.409.3||||| |DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    (continued)|Mandatory|Recycling by occupants (with exception)|5.410.1||||| |DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    (continued)|Mandatory|Recycling by occupants: additions (with exception)|5.410.1.1||||| |DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    (continued)|Mandatory|Recycling by occupants: sample ordinance
    |5.410.1.2||||| |DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    (continued)|Mandatory|Commissioning new buildings (≥ 10,000 sf) [N]|5.410.2||||| |DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    (continued)|Mandatory|Owner’s or owner representative’s Project Requirements
    (OPR) [N]|5.410.2.1||||| |DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency
    (continued)|Mandatory|Basis of Design (BOD) [N]|5.410.2.2|||||

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-45

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    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    CHAPTER 5
    DIVISIONS    		 Col2 SECTION TITLE CODE
    SECTION    		 Y N/A O PLAN SHEET,
    SPEC OR
    ATTACH
    (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency    		 Mandatory Commissioning plan [N] 5.410.2.3
    (continued)
    DIVISION 5.4
    Material
    Conservation
    and Resource
    Efficiency    		 Mandatory Functional performance testing [N] 5.410.2.4
    (continued)
    **DIVISION 5.
  • CALGreen § 5.105.2 Medium relevance — show source text

    Exception: Combined addition(s) to existing building(s) of two times the area or more of the existing building(s) is not eligible to meet compliance with Section 5.105.2 or Section A5.105.2.

    A5.409.2 Whole building life cycle assessment. Projects shall meet the minimum requirements of Section A5.409.2 for Tier 1 or Tier 2 compliance.

    A5.409.2.1 Tier 1. Projects shall conduct a cradle-to-grave whole building life cycle assessment meeting the requirements of Section 5.409.2 and performed in accordance with ISO 14040 and 14044, excluding operating energy, demonstrating a minimum 15-percent reduction in global warming potential (GWP) as compared to a reference baseline building of similar size, function, complexity, type of construction, material specification, and location that meets the requirements of all parts of the California Building Standards Code currently in effect. Software used to conduct the whole building life cycle assessment, including reference baseline building, shall have a data set compliant with ISO 14044, and ISO 21930 or EN 15804, and the software shall conform to ISO 21931 and/or EN 15978. The software tools and data sets shall be the same for evaluation of both the baseline building and the proposed building.

    Exception: For projects that include building reuse, the reference baseline building shall exclude the reused elements. The percent reduction in GWP shall be achieved through the design and construction of new project elements.

    A5.409.2.2 Tier 2. Projects shall conduct a cradle-to-grave whole building life cycle assessment meeting the requirements of Section 5.409.2 and performed in accordance with ISO 14040 and ISO 14044, excluding operating energy, demonstrating a minimum 20-percent reduction in GWP as compared to a reference baseline building of similar size, function, complexity, type of construction, material specification, and location that meets the requirements of all parts of the California Building Standards Code currently in effect. Software used to conduct the whole building life cycle assessment, including reference baseline building, shall have a data set compliant with ISO 14044, and ISO 21930 or EN 15804, and the software shall conform to ISO 21931 and/or EN 15978. The software tools and data sets shall be the same for evaluation of both the baseline building and the proposed building.

    Exception: For projects that include building reuse, the reference baseline building shall not be of new construction and shall retain existing materials. The percent reduction in GWP shall be achieved through the design and construction of new project elements.

    A5.409.2.3 Verification of compliance. A summary of the GWP analysis produced by the software and Worksheet WS-7 signed by the design professional of record shall be provided in the construction documents as documentation of compliance. A copy of the whole building life cycle assessment which includes the GWP analysis produced by the software, in addition to maintenance and training information, shall be included in the operation and maintenance manual and shall be provided to the owner at the close of construction. The enforcing agency may require inspection and inspection reports in accordance with Sections 702.2 and 703.1 during and at completion of construction to demonstrate substantial conformance. Inspection shall be performed by the design professional of record or third party acceptable to the enforcing agency.

    A5.409.3 Product GWP compliance—prescriptive path. Each product that is permanently installed and listed in Table A5.409.3 shall have a Type III environmental product declaration (EPD), either product-specific or factory-specific.

  • CALGreen § 409.2.3 Medium relevance — show source text

    Software used to conduct the whole building life cycle assessment, including reference baseline building, shall have a data set compliant with ISO 14044, and ISO 21930 or EN 15804, and the software shall conform to ISO 21931 and/or EN 15978. The software tools and data sets shall be the same for evaluation of both the baseline building and the proposed building.

    Exception: For projects that include building reuse, the reference baseline building shall not be of new construction and shall retain existing materials. The percent reduction in GWP shall be achieved through the design and construction of new project elements.

    A5.409.2.3 Verification of compliance. A summary of the GWP analysis produced by the software and Worksheet WS-7 signed by the design professional of record shall be provided in the construction documents as documentation of compliance. A copy of the whole building life cycle assessment which includes the GWP analysis produced by the software, in addition to maintenance and training information, shall be included in the operation and maintenance manual and shall be provided to the owner at the close of construction. The enforcing agency may require inspection and inspection reports in accordance with Sections 702.2 and 703.1 during and at completion of construction to demonstrate substantial conformance. Inspection shall be performed by the design professional of record or third party acceptable to the enforcing agency.

    A5.409.3 Product GWP compliance—prescriptive path. Each product that is permanently installed and listed in Table A5.409.3 shall have a Type III environmental product declaration (EPD), either product-specific or factory-specific.

    Exception: Concrete may be considered one product category to meet compliance with this section. A weighted average of the maximum GWP for all concrete mixes installed in the project shall be less than the weighted average maximum GWP allowed per Table A5.409.3 using Exception Equation A5.409.3.1. Calculations shall be performed with consistent units of measurement for the material quantity and the GWP value. For the purposes of this exception, industry-wide EPDs are acceptable.

    Exception EQUATION A5.409.3.1

    GWP n < GWP allowed

    where

    GWP n = Σ (GWP n )(v n ) and GWP allowed = Σ (GWP allowed )(v n )

    and

    n = each concrete mix installed in the project GWP n = the GWP for concrete mix n per concrete mix EPD, in kg CO 2 e/m [3]

    GWP allowed = the GWP potential allowed for concrete mix n per Table 5.409.3 v n = the volume of concrete mix n installed in the project, in m [3]

    APPENDIX A5-30 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

    |TABLE A5.409.3—PRODUCT GWP LIMITS,

  • CALGreen § 409.3 Medium relevance — show source text

    For concrete, Tier 1 is 150%, Tier 2 is 100% of the National Ready Mixed Concrete Association (NRMCA) 2022 version 3 Pacific Southwest regional benchmark values are used for
    the GWP allowed, except for High Early Strength.
    3. Concrete High Early Strength ready-mixed shall be calculated at 130% of the ready-mixed concrete GWP allowed values for each product category.|1. The GWP values of the products listed in Table A5.409.3 are based on 150% of Buy Clean California Act (BCCA) GWP values, except for concrete products which are not included
    in BCCA.
    2. For concrete, Tier 1 is 150%, Tier 2 is 100% of the National Ready Mixed Concrete Association (NRMCA) 2022 version 3 Pacific Southwest regional benchmark values are used for
    the GWP allowed, except for High Early Strength.
    3. Concrete High Early Strength ready-mixed shall be calculated at 130% of the ready-mixed concrete GWP allowed values for each product category.|1. The GWP values of the products listed in Table A5.409.3 are based on 150% of Buy Clean California Act (BCCA) GWP values, except for concrete products which are not included
    in BCCA.
    2. For concrete, Tier 1 is 150%, Tier 2 is 100% of the National Ready Mixed Concrete Association (NRMCA) 2022 version 3 Pacific Southwest regional benchmark values are used for
    the GWP allowed, except for High Early Strength.
    3. Concrete High Early Strength ready-mixed shall be calculated at 130% of the ready-mixed concrete GWP allowed values for each product category.|

    A5.409.3.2 Verification of compliance. Calculations to demonstrate compliance, Type III EPDs for products required to comply if included in the project, and Worksheet WS-8 signed by the design professional of record shall be provided on the construction documents. Updated EPDs for products used in construction shall be provided to the owner at the close of construction and to the enforcement entity upon request. The enforcing agency may require inspection and inspection reports in accordance with Sections 702.2 and 703.1 during and at completion of construction to demonstrate substantial conformance. Inspection shall be performed by the design professional of record or third party acceptable to the enforcing agency.

    A5.409.4 Whole building life cycle assessment of additional impacts. Maintaining compliance with the requirements of Section 5.409.2, conduct a cradle-to-grave whole building life cycle assessment performed in accordance with ISO 14044, including operating energy, and demonstrating a minimum 10-percent improvement for a minimum of two additional impacts listed in Section A5.409.4.1, as compared to a reference baseline building of similar size, function, complexity, type of construction, material specification, location and operating energy performance that meets the requirements of the California Energy Code currently in effect.

    A5.409.4.1 Impacts to be considered. Select from the following impacts in the assessment:

    1. Fossil fuel depletion.

    2. Stratospheric ozone depletion.

    3. Acidification of land and water sources.

    4. Eutrophication.

    5. Photochemical oxidants (smog).

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-31

    on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

    APPENDIX A5-32 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

Frequently asked questions

How do I treat a product with both postconsumer and preconsumer recycled content?

Combine them as: postconsumer % + 0.5 × preconsumer % to get the effective recycled content percentage for RCV calculations, per Equations A5.4‑6/A5.4‑7.

Can I count reused or salvaged materials toward recycled content?

Yes — reused materials are a separate requirement (A5.405.3) and can be part of material conservation, but the recycled content calculation uses postconsumer/preconsumer percentages for new products; also ensure documentation and valuation per the code.

If I use a mixed C&D processor, what verification is required?

You must include a qualified third‑party verified facility average diversion rate from the processor and provide the completed waste management report or certification to the enforcing agency. § A5.408.3.1

Do LCAs have to exclude operating energy?

For the baseline Tier 1/2 whole‑building LCA GWP comparison, operating energy is excluded in the A5.409.2 GWP path; however § A5.409.4 (additional‑impacts path) explicitly requires LCA including operating energy. Verify which path you use.

Where are the worksheets/template forms?

Worksheets (e.g., WS‑9 for whole‑building LCA, construction waste management plan forms) and sample forms are included with the code guidance and can be used for submittals; the code references WS‑8/WS‑9 and sample CWM templates.

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