CALGreen · California Green Building Standards Code (CALGreen)

Construction and demolition (C&D) waste reduction and diversion requirements

CALGreen requires most nonhazardous C&D to be recycled or salvaged so that at least **65%** is diverted from landfill (unless a stricter local ordinance applies). Projects must submit a construction waste management plan, choose weight or volume reporting (not both), use verifiable waste‑hauler/processor documentation, and may use a waste‑stream reduction alternative in limited cases; voluntary Appendix tiers raise diversion targets and add third‑party verification requirements.

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Last reviewed: July 6, 2026

What the code requires — plain English (controlling §)

You asked about § 5.408.3.1. I could not find that exact numbered section in the retrieved CALGreen files; the mandatory statewide requirement is to divert at least 65 percent of nonhazardous construction and demolition waste, set out in § 5.408.1. Enhanced (voluntary/Appendix) tier targets and verification rules appear in § A5.408.3.1 (Tier 1: 65%, Tier 2: 80%) and its verification provisions.

The single most important rule: Recycle or salvage at least 65% of nonhazardous C&D waste (or comply with a more stringent local C&D ordinance); voluntary Appendix tiers raise that target to 80% with third‑party verification.

Requirements in detail

Scope and baseline

  • Applicability: Work subject to Chapter 5 C&D provisions (new construction, additions, alterations where permit triggers Section 301.3). The statewide mandatory baseline is 65% diversion of nonhazardous C&D unless a local ordinance is more stringent — § 5.408.1.
  • Voluntary/Appendix enhanced targets: § A5.408.3.1 establishes Tier 1: 65% (with mixed‑waste verification language) and § A5.408.3.1.1 (Tier 2: 80%). Verification and reporting requirements appear at § A5.408.3.1.2.

Required plan, tracking, and verification

  • Construction waste management plan: submit when no stricter local ordinance exists. Plan must identify materials to divert, whether materials are source‑separated or bulk mixed (single stream), diversion facilities, and specify diversion measurement (by weight OR volume, but not both) — § 5.408.1.1.
  • Waste management company: use a company able to provide verifiable documentation of the diversion percentage (or the owner/contractor can determine how diversion is achieved) — § 5.408.1.2.
  • Verification/documentation: provide documentation/waste management report showing compliance; Appendix tiers require a copy of completed waste management report or company certification — § 5.408.1.4 and § A5.408.3.1.2.

Calculation rules and alternatives

  • Diversion calculation method: measure diverted quantities by weight or by volume, but not both, per the plan requirements — § 5.408.1.1.
  • Waste stream reduction alternative (new construction only): if the combined weight of new‑construction landfill disposal does not exceed two pounds per square foot of building area, the project may be deemed to meet the 65% requirement (subject to enforcing agency approval) — § 5.408.1.3.
  • Residential variants: residential sections include similar 65% rules and slightly different waste‑stream reduction thresholds (e.g., 3.4 and 2.0 lb/ft² alternatives appear in Chapter 4 residential provisions) — see § 4.408.1 and § 4.408.4 / 4.408.4.1.

Exceptions and special categories

  • Excavated soil and land‑clearing debris are explicitly excepted from certain diversion requirements (often handled separately — e.g., 100% reuse/recycle requirement for trees/stumps/soil in § 5.408.3).
  • Alternate methods: if local diversion or recycling facilities capable of compliance do not exist, the enforcing agency can accept alternate waste reduction methods developed with local agencies. This is an explicit exception to Sections 5.408.1.1/1.2.
  • Local ordinance precedence: follow a local C&D ordinance when it is more stringent than state CALGreen requirements — § 5.408.1.

Table — decision‑relevant dimensions and values

Decision item Value / Threshold Code Reference
Mandatory minimum diversion (statewide) 65% of nonhazardous C&D § 5.408.1
Voluntary/Appendix Tier 1 diversion 65%, with mixed‑waste verification language § A5.408.3.1
Voluntary/Appendix Tier 2 diversion 80% diversion § A5.408.3.1.1
Diversion measurement method By weight OR volume, but not both § 5.408.1.1
Waste stream reduction alternative (new construction) ≤ 2 lb/ft² landfill disposal may be deemed compliant (enforcing agency approval) § 5.408.1.3
Documentation required Completed waste management report or company certification; plan accessible during construction § 5.408.1.4 and § A5.408.3.1.2
Excavated soil / land‑clearing Special treatment; excluded from some diversion counts; see reuse/recycle rules § 5.408.3

Exceptions & special cases

  • Excavated soils and land‑clearing debris: treated separately and are an explicit exception to diversion calculations; for example, § 5.408.3 requires reuse/recycling of these materials where applicable.
  • Where local C&D ordinances are more stringent, follow the local ordinance instead of the CALGreen baseline — § 5.408.1.
  • If no diversion/recycling facilities exist in reasonable haul range, enforceable alternate methods developed with local agencies can be accepted. This is recognized in the exceptions to plan and waste management company requirements.
  • Appendix/voluntary tiers require third‑party verification language for mixed‑waste processors (facility average diversion rate; verification acceptable to the enforcing agency) — § A5.408.3.1.

Common mistakes

  • Confusing weight versus volume: the code requires choosing one method (weight OR volume) and sticking with it in your plan and reporting — § 5.408.1.1.
  • Failing to document: not providing a completed waste management report or verifiable hauling/processing documentation is a frequent compliance failure — § 5.408.1.4 and § A5.408.3.1.2.
  • Incorrectly including excavated soil in diversion percentages when it’s an exception (or not following the soil/land‑clearing reuse rules in § 5.408.3).
  • Relying on a mixed‑waste processor without verifying the facility’s average diversion rate when Appendix verification language applies — Appendix tiers require third‑party‑verified facility averages.

Worked example — concrete numbers

Scenario: new commercial building, 10,000 ft² gross floor area. The contractor estimates the project will generate 400 tons (800,000 lbs) of nonhazardous C&D.

  1. Mandatory target: 65% diversion (state baseline under § 5.408.1).

    • Required diverted amount = 0.65 × 400 tons = 260 tons diverted.
    • Landfill/disposed = 400 − 260 = 140 tons.

  2. If the project uses the waste stream reduction alternative in § 5.408.1.3: the “≤ 2 lb/ft²” test for new construction yields a threshold of:

    • 2 lb/ft² × 10,000 ft² = 20,000 lb = 10 tons.
    • If the combined weight of landfill disposal from new construction is ≤ 10 tons, the enforcing agency may deem the 65% requirement met. For this scenario (140 tons landfill), the project is far above the 10‑ton threshold and must comply by diverting the 260 tons.

  3. Appendix Tier 2 target (if pursuing voluntary enhanced measures per A5.408.3.1.1) would require 80% diversion (= 320 tons diverted) and third‑party verification of the waste management documentation.

  4. Reporting: track diverted quantities by weight (or volume, but choose one), obtain haul/processing weight tickets and a final waste management report from the waste hauler/processor and supply that to the enforcing agency at project closeout — § 5.408.1.1 / 5.408.1.4.

Related provisions (CALGreen sections)

  • § 5.408.1 — Construction waste management; 65% minimum statewide baseline.
  • § 5.408.1.1 — Construction waste management plan requirements (materials, source separation, diversion facility, measurement).
  • § 5.408.1.2 — Waste management company documentation requirement.
  • § 5.408.1.3 — Waste stream reduction alternative (≤ 2 lb/ft² for new construction).
  • § 5.408.1.4 — Documentation required; plan access during construction.
  • § 5.408.2 — Universal waste verification for certain additions/alterations.
  • § 5.408.3 — Excavated soil and land‑clearing debris reuse/recycle provisions.
  • § A5.408.3.1 — Appendix A5 enhanced construction waste reduction (Tier 1: 65% diversion; mixed‑waste facility verification language).
  • § A5.408.3.1.1 — Appendix Tier 2: 80% diversion.

Code references

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

  • 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

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    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 § 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 § 5.407.2.2.2 High relevance — show source text

    1. The door is recessed at least 4 feet.

    2. Other methods which provide equivalent protection.

    5.407.2.2.2 Flashing. Install flashings integrated with a drainage plane.

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 5-23

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    NONRESIDENTIAL MANDATORY MEASURES

    SECTION 5.408—CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RECYCLING

    5.408.1 Construction waste management. Recycle and/or salvage for reuse a minimum of 65 percent of the nonhazardous construction and demolition waste in accordance with Section 5.408.1.1, 5.408.1.2 or 5.408.1.3; or meet a local construction and demolition waste management ordinance, whichever is more stringent.

    5.408.1.1 Construction waste management plan. Where a local jurisdiction does not have a construction and demolition waste management ordinance that is more stringent, submit a construction waste management plan that:

    1. Identifies the construction and demolition waste materials to be diverted from disposal by efficient usage, recycling, reuse on the project or salvage for future use or sale.

    2. Determines if construction and demolition waste materials will be sorted on-site (source-separated) or bulk mixed (single stream).

    3. Identifies diversion facilities where construction and demolition waste material collected will be taken.

    4. Specifies that the amount of construction and demolition waste materials diverted shall be calculated by weight or volume, but not by both.

    5.408.1.2 Waste management company. Utilize a waste management company that can provide verifiable documentation that the percentage of construction and demolition waste material diverted from the landfill complies with this section.

    Note: The owner or contractor shall make the determination if the construction and demolition waste material will be diverted by a waste management company.

    Exceptions to Sections 5.408.1.1 and 5.408.1.2:

    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.

    5.408.1.3 Waste stream reduction alternative. The combined weight of new construction disposal that does not exceed two pounds per square foot of building area may be deemed to meet the 65 percent minimum requirement as approved by the enforcing agency.

    5.408.1.4 Documentation. Documentation shall be provided to the enforcing agency which demonstrates compliance with Sections 5.408.1.1 through 5.408.1.3. The waste management plan shall be updated as necessary and shall be accessible during construction for examination by the enforcing agency.

    Notes:

    1. Sample forms found in “A Guide to the California Green Building Standards Code (Nonresidential)” located at https://www.dgs.ca.gov/BSC/Resources/Page-Content/Building-Standards-Commission-Resources-ListFolder/CALGreen may be used to assist in documenting compliance with the waste management plan.
    2. Mixed construction and demolition debris (C&D) processors can be located at the California Department of Resources Recycling and Recovery (CalRecycle).
  • 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 § 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 § 5.403 High relevance — show source text

    REFERENCE STUDY PERIOD.

    TEST.

    TYPE III ENVIRONMENTAL PRODUCT DECLARATION (EPD).

    FACTORY-SPECIFIC EPD.

    INDUSTRY-WIDE EPD (IW-EPD).

    PRODUCT-SPECIFIC EPD.

    SECTION 5.403—FOUNDATION SYSTEMS (RESERVED)

    SECTION 5.404—EFFICIENT FRAMING TECHNIQUES (RESERVED)

    SECTION 5.405—MATERIAL SOURCES (RESERVED)

    SECTION 5.406—ENHANCED DURABILITY AND REDUCED MAINTENANCE (RESERVED)

    SECTION 5.407—WATER RESISTANCE AND MOISTURE MANAGEMENT

    5.407.1 Weather protection. Provide a weather-resistant exterior wall and foundation envelope as required by California Building Code Section 1402.2 (Weather Protection), manufacturer’s installation instructions or local ordinance, whichever is more stringent.

    5.407.2 Moisture control. Employ moisture control measures by the following methods.

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

    5.407.2.2 Entries and openings. Design exterior entries and/or openings subject to foot traffic or wind-driven rain to prevent water intrusion into buildings as follows:

    5.407.2.2.1 Exterior door protection. Primary exterior entries shall be covered to prevent water intrusion by using nonabsorbent floor and wall finishes within at least 2 feet around and perpendicular to such openings plus at least one of the following:

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

    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.

    5.407.2.2.2 Flashing. Install flashings integrated with a drainage plane.

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 5-23

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    NONRESIDENTIAL MANDATORY MEASURES

    SECTION 5.408—CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RECYCLING

    5.408.1 Construction waste management. Recycle and/or salvage for reuse a minimum of 65 percent of the nonhazardous construction and demolition waste in accordance with Section 5.408.1.1, 5.408.1.2 or 5.408.1.3; or meet a local construction and demolition waste management ordinance, whichever is more stringent.

    5.408.1.1 Construction waste management plan. Where a local jurisdiction does not have a construction and demolition waste management ordinance that is more stringent, submit a construction waste management plan that:

    1. Identifies the construction and demolition waste materials to be diverted from disposal by efficient usage, recycling, reuse on the project or salvage for future use or sale.

    2. Determines if construction and demolition waste materials will be sorted on-site (source-separated) or bulk mixed (single stream).

    3. Identifies diversion facilities where construction and demolition waste material collected will be taken.

    4. Specifies that the amount of construction and demolition waste materials diverted shall be calculated by weight or volume, but not by both.

  • CALGreen § 407.1 High relevance — show source text

    SECTION A4.406—ENHANCED DURABILITY AND REDUCED MAINTENANCE (RESERVED)

    SECTION A4.407—WATER RESISTANCE AND MOISTURE MANAGEMENT

    A4.407.1 Drainage around foundations. Install foundation and landscape drains which discharge to a dry well, sump, bioswale or other approved on-site location.

    A4.407.2 Roof drainage. Install gutter and downspout systems to route water at least 5 feet away from the foundation or connect to landscape drains which discharge to a dry well, sump, bioswale, rainwater capture system or other approved on-site location.

    A4.407.3 Flashing details. Provide flashing details on the building plans which comply with accepted industry standards or manufacturer’s instructions. Details are shown on house plans at all of the following locations:

    1. Around windows and doors.

    2. Roof valleys.

    3. Deck connections to the structure.

    4. Roof-to-wall intersections.

    5. Chimneys to roof intersections.

    6. Drip caps above windows and doors with architectural projections.

    Note: Reference details may be found in the Residential Sheet Metal Guidelines published by the Sheet Metal and Air Conditioning Contractors’ National Association Inc.

    A4.407.4 Material protection. Protect building materials delivered to the construction site from rain and other sources of moisture.

    A4.407.5 Ice and water barriers. In Climate Zone 16, an ice and water barrier is installed at valley, eaves and wall to roof intersections. The ice and water barrier shall extend at least 24 inches inside the exterior wall line or as specified by the manufacturer’s installation instructions.

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A4-17

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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.
  • CALGreen § 5.408.1.1 High relevance — show source text

    Note: The owner or contractor shall make the determination if the construction and demolition waste material will be diverted by a waste management company.

    Exceptions to Sections 5.408.1.1 and 5.408.1.2:

    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.

    5.408.1.3 Waste stream reduction alternative. The combined weight of new construction disposal that does not exceed two pounds per square foot of building area may be deemed to meet the 65 percent minimum requirement as approved by the enforcing agency.

    5.408.1.4 Documentation. Documentation shall be provided to the enforcing agency which demonstrates compliance with Sections 5.408.1.1 through 5.408.1.3. The waste management plan shall be updated as necessary and shall be accessible during construction for examination by the enforcing agency.

    Notes:

    1. Sample forms found in “A Guide to the California Green Building Standards Code (Nonresidential)” located at https://www.dgs.ca.gov/BSC/Resources/Page-Content/Building-Standards-Commission-Resources-ListFolder/CALGreen may be used to assist in documenting compliance with the waste management plan.
    2. Mixed construction and demolition debris (C&D) processors can be located at the California Department of Resources Recycling and Recovery (CalRecycle).

    5.408.2 Universal waste. [A] Additions and alterations to a building or tenant space that meet the scoping provisions in Section 301.3 for nonresidential additions and alterations, shall require verification that Universal Waste items such as fluorescent lamps and ballast and mercury containing thermostats as well as other California prohibited Universal Waste materials are disposed of properly and are diverted from landfills. A list of prohibited Universal Waste materials shall be included in the construction documents.

    Note: Refer to the Universal Waste Rule link at: https://dtsc.ca.gov/universalwaste/

    5.408.3 Excavated soil and land clearing debris. 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.

    Exception: Reuse, either on-site or off-site, of vegetation or soil contaminated by disease or pest infestation.

    Notes:

    1. If contamination by disease or pest infestation is suspected, contact the County Agricultural Commissioner and follow its direction for recycling or disposal of the material. (www.cdfa.ca.gov/exec/ county/county_contacts.html)
    2. For a map of known pest and/or disease quarantine zones, consult with the California Department of Food and Agriculture. (www.cdfa.ca.gov)

    SECTION 5.409—LIFE CYCLE ASSESSMENT

    5.409.1 Scope.

  • CALGreen § 8-8 High relevance — show source text
    1. Salvage: Excess materials that cannot be used in the project, nor returned to the vendor, will be offered to site workers, the owner or donated to charity if feasible.
    2. [HAULING COMPANY] will provide a commingled drop box at the jobsite for most of the construction waste. These commingled drop boxes will be taken to [Sorting Facility Name and Location]. The average diversion rate for commingled waste will be ____%. As site conditions permit, additional drop boxes will be used for particular phases of construction (e.g., concrete and wood waste) to ensure the highest waste diversion rate possible.
    3. In the event that the waste diversion rate achievable via the strategy described in (6) above, is projected to be lower than what is required, then a strategy of source-separated waste diversion and/or waste stream reduction will be implemented. Source separated waste refers to jobsite waste that is not commingled but is instead allocated to a debris box designated for a single material type, such as clean wood or metal.

    Notes:

    1. Waste stream reduction refers to efforts taken by the builder to reduce the amount of waste generated by the project to below four (4) pounds per square foot of building area.

    2. When using waste stream reduction measures, the gross weight of the product is subtracted from a base weight of four (4) pounds per square foot of building area. This reduction is considered additional diversion and can be used in the waste reduction percentage calculations.

    3. [HAULING COMPANY] will track and calculate the quantity (in tons) of all waste leaving the project and calculate the waste diversion rate for the project. [HAULING COMPANY] will provide Project Manager with an updated monthly report on gross weight hauled and the waste diversion rate being achieved on the project. [HAULING COMPANY’s] monthly report will track separately the gross weights and diversion rates for commingled debris and for each source-separated waste stream leaving the project. In the event that [HAULING COMPANY] does not service any or all of the debris boxes on the project, the [HAULING COMPANY] will work with the responsible parties to track the material type and weight (in tons) in such debris boxes in order to determine waste diversion rates for these materials.

    4. In the event that Subcontractors furnish their own debris boxes as part of their scope of work, such Subcontractors shall not be excluded from complying with the CWM Plan and will provide [HAULING COMPANY] weight and waste diversion data for their debris boxes.

    5. In the event that site use constraints (such as limited space) restrict the number of debris boxes that can be used for collection of designated waste the project Superintendent will, as deemed appropriate, allocate specific areas onsite where individual material types are to be consolidated. These collection points are not to be contaminated with nondesignated waste types.

    6. Debris from jobsite office and meeting rooms will be collected by [DISPOSAL SERVICE COMPANY]. [DISPOSAL SERVICE COMPANY] will, at a minimum, recycle office paper, plastic, metal and cardboard.

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    COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL

    Construction Waste Management (CWM) Worksheet

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

    |Project Name:
    Job Number:    _
    Project Manager: ________________________________________________
    Waste

  • CALGreen § 2.7 High relevance — show source text

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    RESIDENTIAL MANDATORY MEASURES

    Notes:

    1. The Model Water Efficient Landscape Ordinance (MWELO) is located in the California Code of Regulations, Title 23, Chapter 2.7, Division 2.

    MWELO and supporting documents, including a water budget calculator, are available at: https://www.water.ca.gov/

    SECTION 4.305—WATER REUSE SYSTEMS (RESERVED)

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    4 RESIDENTIAL MANDATORY MEASURES

    DIVISION 4.4 – MATERIAL CONSERVATION AND RESOURCE EFFICIENCY

    SECTION 4.401—GENERAL

    4.401.1 Scope. The provisions of this chapter shall outline means of achieving material conservation and resource efficiency through protection of buildings from exterior moisture; construction waste diversion; employment of techniques to reduce pollution through recycling of materials; and building commissioning or testing, adjusting and balancing.

    SECTION 4.402—DEFINITIONS

    4.402.1 Definitions. Reserved.

    SECTION 4.403 —FOUNDATION SYSTEMS (RESERVED)

    SECTION 4.404—EFFICIENT FRAMING TECHNIQUES (RESERVED)

    SECTION 4.405—MATERIAL SOURCES (RESERVED)

    SECTION 4.406—ENHANCED DURABILITY AND REDUCED MAINTENANCE

    4.406.1 Rodent proofing. Annular spaces around pipes, electric cables, conduits or other openings in sole/bottom plates at exterior walls shall be protected against the passage of rodents by closing such openings with cement mortar, concrete masonry or a similar method acceptable to the enforcing agency.

    SECTION 4.407—WATER RESISTANCE AND MOISTURE MANAGEMENT (RESERVED)

    SECTION 4.408—CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RECYCLING

    4.408.1 Construction waste management. Recycle and/or salvage for reuse a minimum of 65 percent of the nonhazardous construction and demolition waste in accordance with either Section 4.408.2, 4.408.3 or 4.408.4, or meet a more stringent local construction and demolition waste management ordinance.

    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 or are not located reasonably close to the jobsite.
    3. The enforcing agency may make exceptions to the requirements of this section when isolated jobsites are located in areas beyond the haul boundaries of the diversion facility.

    4.408.2 Construction waste management plan. Submit a construction waste management plan in conformance with Items 1 through 5. The construction waste management plan shall be updated as necessary and shall be available during construction for examination by the enforcing agency.

    1. Identify the construction and demolition waste materials to be diverted from disposal by recycling, reuse on the project or salvage for future use or sale.
    2. Specify if construction and demolition waste materials will be sorted on-site (source-separated) or bulk mixed (single stream).
  • CALGreen § 4.406.1 High relevance — show source text

    4.406.1 Rodent proofing. Annular spaces around pipes, electric cables, conduits or other openings in sole/bottom plates at exterior walls shall be protected against the passage of rodents by closing such openings with cement mortar, concrete masonry or a similar method acceptable to the enforcing agency.

    SECTION 4.407—WATER RESISTANCE AND MOISTURE MANAGEMENT (RESERVED)

    SECTION 4.408—CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RECYCLING

    4.408.1 Construction waste management. Recycle and/or salvage for reuse a minimum of 65 percent of the nonhazardous construction and demolition waste in accordance with either Section 4.408.2, 4.408.3 or 4.408.4, or meet a more stringent local construction and demolition waste management ordinance.

    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 or are not located reasonably close to the jobsite.
    3. The enforcing agency may make exceptions to the requirements of this section when isolated jobsites are located in areas beyond the haul boundaries of the diversion facility.

    4.408.2 Construction waste management plan. Submit a construction waste management plan in conformance with Items 1 through 5. The construction waste management plan shall be updated as necessary and shall be available during construction for examination by the enforcing agency.

    1. Identify the construction and demolition waste materials to be diverted from disposal by recycling, reuse on the project or salvage for future use or sale.

    2. Specify if construction and demolition waste materials will be sorted on-site (source-separated) or bulk mixed (single stream).

    3. Identify diversion facilities where the construction and demolition waste material will be taken.

    4. Identify construction methods employed to reduce the amount of construction and demolition waste generated.

    5. Specify that the amount of construction and demolition waste materials diverted shall be calculated by weight or volume, but not by both.

    4.408.3 Waste management company. Utilize a waste management company, approved by the enforcing agency, which can provide verifiable documentation that the percentage of construction and demolition waste material diverted from the landfill complies with Section 4.408.1.

    Note: The owner or contractor may make the determination if the construction and demolition waste materials will be diverted by a waste management company.

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    RESIDENTIAL MANDATORY MEASURES

    4.408.4 Waste stream reduction alternative [LR]. Projects that generate a total combined weight of construction and demolition waste disposed of in landfills, which do not exceed 3.4 pounds per square foot of the building area shall meet the minimum 65 percent construction waste reduction requirement in Section 4.408.1.

    4.408.4.1 Waste stream reduction alternative. Projects that generate a total combined weight of construction and demolition waste disposed of in landfills, which do not exceed 2 pounds per square foot of the building area, shall meet the minimum 65 percent construction waste reduction requirement in Section 4.408.1.

    4.408.5 Documentation. Documentation shall be provided to the enforcing agency which demonstrates compliance with Section 4.408.2, Items 1 through 5, Section 4.408.3 or Section 4.408.4.

    Notes:

Frequently asked questions

What if my local jurisdiction has a C&D ordinance?

Follow the local ordinance if it is more stringent than the CALGreen baseline; CALGreen directs projects to meet the local ordinance when that is stricter than § 5.408.1.

Can I report diversion by both weight and volume?

No. The construction waste management plan must specify calculation by weight or by volume, but not both — § 5.408.1.1.

Are excavated soils counted toward the 65% requirement?

Excavated soil and land‑clearing debris are exceptions and are treated separately (see § 5.408.3). Do not automatically include them in the general nonhazardous C&D diversion percentage unless the enforcing agency directs otherwise.

What documentation do I need at final inspection?

Provide the completed waste management report or certification/documentation from your waste management company showing the quantities diverted (weight tickets, processor reports) — see § 5.408.1.4 and § A5.408.3.1.2.

If I use a mixed‑waste processor, what verification is required?

Appendix voluntary language requires that mixed recyclables sent to mixed‑waste recycling facilities include a qualified third‑party‑verified facility average diversion rate, and verification must meet minimum eligibility guidelines acceptable to the enforcing agency — § A5.408.3.1.

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