CALGreen · California Green Building Standards Code (CALGreen)

Are alternate documentation or alternative compliance methods accepted?

If you want to use different paperwork or a different method to show CALGreen compliance, you can — but only if the enforcing agency accepts it as demonstrating substantial conformance with the intent of the measure (see § 102.3). Provide clear, verifiable evidence (weight tickets, third‑party reports, test or evaluation reports), reference the checklist items, and coordinate with the enforcing agency early.

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Last reviewed: July 6, 2026

What the code requires — 2-4 sentences

The California Green Building Standards Code accepts alternate documentation when the enforcing agency finds the proposed alternate is satisfactory to demonstrate substantial conformance with the intent of the green building measure. This authority is stated in § 102.3 (Verification). The CALGreen text that contains § 101.8 was not found in the provided file set, so I cannot ground any rule on § 101.8 from the supplied documents.

The single most important rule: If you propose alternate paperwork or a different method to show compliance, get approval from the enforcing agency — they decide if it demonstrates substantial conformance. § 102.3

Requirements in detail

Short plain-English rule

  • You must provide documentation that shows conformance with required CALGreen measures. Alternate documentation is allowed, but only if the enforcing agency accepts it as satisfactorily demonstrating substantial conformance with the intent of the measure. § 102.3.

Who decides?

  • The enforcing agency (local building department or state agency identified for the occupancy) evaluates and accepts alternate documentation. See the HCD-specific note under § 102.3 about the Residential Occupancies Application Checklist.

What “acceptable” means

  • The alternate documentation must show substantial conformance with the intent of the green building requirement — not necessarily identical form or template. The enforcing agency determines whether the alternate is satisfactory. § 102.3.

Decision-relevant dimensions (table)

Decision dimension Typical values / examples What matters to the enforcing agency Code Reference
Can you submit alternate documentation? Yes — if accepted by enforcing agency Demonstrates substantial conformance with intent § 102.3
Who accepts alternates? Local enforcing agency / state agency for occupancy Agency determines acceptability case‑by‑case § 102.3
Level of proof required Weight tickets, third‑party reports, product certifications, chain of custody, test reports Sufficient evidence to substantiate claims; tests or evaluation reports may be required § 102.3; related guidance in Appendix and other codes
When a specialized checklist applies Residential projects (HCD) Submit Residential Occupancies Application Checklist and reference the measure‑specific documentation § 102.3 [HCD]
Alternative methods for specific measures Examples: alternate waste reduction method, alternate recycled‑content calculation for concrete Some sections explicitly permit alternatives or alternate calculations when approved by the enforcing agency See § 4.408 (waste) and A4.405.3.1.5 (concrete)

Form and timing of submittal

  • Include references to the measure‑specific documentation on the application checklist (required for residential HCD projects per the bracketed HCD language in § 102.3).
  • Be prepared to provide full supporting evidence at plan check and keep documentation available during construction for inspection (example: construction waste plans and weight tickets per § 4.408.1.4).

Exceptions & special cases

  • HCD Residential projects: The HCD note in § 102.3 requires submission of the Residential Occupancies Application Checklist and references to the measure‑specific documentation; HCD will accept alternate documentation only when the enforcing agency finds it satisfactory. § 102.3 [HCD].
  • Some CALGreen sections explicitly provide alternative methods or exceptions (for example, construction waste stream alternatives in § 4.408.4 and calculation alternatives for recycled content in A4.405.3.1.5). Those alternates still require approval or are scoped with conditions.
  • The Building Code and related California codes also provide a general, long‑standing administrative framework for approving alternate materials, methods, tests and reports (case‑by‑case, may require tests, evaluation reports). See the California Building Code alternate approval procedures (e.g., CBC 1.8.7 and related approval criteria) and the Residential Code alternate approval rules (R104.2.2).

Note: I could not locate § 101.8 in the supplied CALGreen files, so I cannot state any text or requirement from § 101.8 here. If you need rules that would be in § 101.8, please upload that file or confirm the exact edition so I can cite it.

Common mistakes

  • Assuming alternates are “automatic”: submitting an alternate without prior coordination or without evidence that it meets the intent. The enforcing agency must find it satisfactory per § 102.3.
  • Weak supporting evidence: providing only an unsigned statement or vendor brochure when the agency expects weight tickets, third‑party verification, test reports or evaluation reports. See examples and documentation requirements in waste sections and appendix guidance.
  • Not referencing the alternate on the application checklist (residential/HCD projects): the HCD note in § 102.3 requires references to measure‑specific documentation.
  • Failing to allow for required testing or evaluation: agencies may require tests or approved evaluation reports (this is a common procedure across Title 24 codes). See CBC/residential alternative approval procedures.

Worked example — alternate documentation accepted for C&D diversion

Scenario:

  • Project: new 10,000 ft² commercial build‑out.
  • CALGreen requires 65% diversion of nonhazardous construction and demolition (C&D) waste (§ 5.408.1 / nonresidential mandatory measure).

Alternate proposed:

  • Prime contractor proposes to use a local mixed‑waste processor’s third‑party verified facility average diversion rate plus hauler weight tickets (instead of source‑separated load tickets on every box) as alternate documentation.

Steps and numbers to prepare for the enforcing agency:

  1. On the application, list the alternate documentation approach and reference the specific CALGreen measure and checklist item (per § 102.3 and the application checklist requirement for referencing measure‑specific documentation).
  2. Provide the hauler’s weight tickets showing:
    • Diverted (recycled/salvaged): 68,000 lbs
    • Landfilled: 32,000 lbs
    • Total generated = 100,000 lbs → diversion rate = 68% (68,000 ÷ 100,000).
  3. Show that 68% ≥ 65% required diversion — numeric compliance established. Cite hauler’s chain‑of‑custody, third‑party facility verification report, and sample manifests. The enforcing agency may accept this as demonstrating "substantial conformance" under § 102.3 if they find the evidence satisfactory.
  4. Be prepared for the enforcing agency to require additional documentation or testing, or to require an approved waste management company per § 5.408.1.2 / § 4.408.3.

Bottom line for the example: with clear weight tickets, third‑party verification and checklist references, the enforcing agency is likely to accept the hauler’s combined documentation as alternate documentation under § 102.3, provided the agency finds the alternate demonstrates substantial conformance to the intent of the measure.

Related provisions

  • § 102.1 — Submittal documents; construction documents and additional documents required by the enforcing agency.
  • § 102.2 — Information on construction documents; clarity to show conformance to this code.
  • § 102.3 — Verification (main controlling section for alternate documentation).
  • § 4.408 (and § 4.408.5) — Residential construction waste reduction and documentation requirements and waste stream alternatives.
  • § 5.408 (and § 5.408.1.4) — Nonresidential construction waste reduction and documentation requirements (includes exceptions and waste stream alternatives).
  • California Building Code — Alternate methods/approval procedures (case‑by‑case approval, may require tests and evidence) (see CBC administration on alternates, e.g., 1.8.7).
  • Residential Code R104.2.2 — Approval of alternative materials, design and methods of construction; evidence and equivalency criteria.
  • Appendix A (A4.405.3.1.5) — Example of an alternate calculation method (concrete SCM recycled‑content calculation).

Code references

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

  • CALGreen § 1.8.7.2 High relevance — show source text

    1.8.7.2 Local building departments. The building department of any city, county, or city and county may approve alternates for use in the erection, construction, reconstruction, movement, enlargement, conversion, alteration, repair, removal, demolition or arrangement of apartments, condominiums, hotels, motels, lodging houses, dwellings or accessory structures, except for the following: 1. Structures located in mobilehome parks as defined in California Health and Safety Code Section 18214. 2. Structures located in special occupancy parks as defined in California Health and Safety Code Section 18862.43. 3. Factory-built housing as defined in California Health and Safety Code Section 19971.

    1.8.7.2.1 Approval of alternates. The consideration and approval of alternates by a local building department shall comply with the following procedures and limitations: 1. The approval shall be granted on a case-by-case basis. 2. Evidence shall be submitted to substantiate claims that the proposed alternate, in performance, safety and protection of life and health, conforms to, or is at least equivalent to, the standards contained in this code and other rules and regulations promulgated by the Department of Housing and Community Development. 3. The local building department may require tests performed by an approved testing agency at the expense of the owner or owner’s agent as proof of compliance. 4. If the proposed alternate is related to accessibility in covered multifamily dwellings or in facilities serving covered multifamily dwellings as defined in Chapter 2 of the California Building Code, the proposed alternate must also meet the threshold set for equivalent facilitation as defined in Chapter 2 of the California Building Code.

    For additional information regarding approval of alternates by a building department pursuant to the State Housing Law, see California Health and Safety Code Section 17951(e) and California Code of Regulations, Title 25, Division 1, Chapter 1, Subchapter 1.

    1.8.7.3 Department of Housing and Community Development. The Department of Housing and Community Development may approve alternates for use in the erection, construction, reconstruction, movement, enlargement, conversion, alteration, repair, removal or demolition of apartments, condominiums, hotels, motels, lodging houses, dwellings or accessory structures thereto and permanent buildings in mobilehome parks and special occupancy parks. The consideration and approval of alternates shall comply with the following: 1. The department may require tests at the expense of the owner or owner’s agent to substantiate compliance with the California Building Standards Code. 2. The approved alternate shall, for its intended purpose, be at least equivalent in performance and safety to the materials, designs, tests or methods of construction prescribed by this code.

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    ADMINISTRATION

    SECTION 1.8.8—APPEALS BOARD

  • CALGreen § 102.1 High relevance — show source text
    1. The application checklist identifies which measures are required by this code and allows users to check off which voluntary items have been selected to meet voluntary tier levels if desired or mandated by a city, county, or city and county.

    SECTION 102—CONSTRUCTION DOCUMENTS AND INSTALLATION VERIFICATION

    102.1 Submittal documents. Construction documents and other data shall be submitted in one or more sets with each application for a permit. Where special conditions exist, the enforcing agency is authorized to require additional construction documents to be prepared by a licensed design professional and may be submitted separately.

    Exception: The enforcing agency is authorized to waive the submission of construction documents and other data not required to be prepared by a licensed design professional.

    102.2 Information on construction documents. Construction documents shall be of sufficient clarity to indicate the location, nature and scope of the proposed green building feature and show that it will conform to the provisions of this code, the California Building Standards Code and other relevant laws, ordinances, rules and regulations as determined by the enforcing agency.

    102.3 Verification. Documentation of conformance for applicable green building measures shall be provided to the enforcing agency. Alternate methods of documentation shall be acceptable when the enforcing agency finds that the proposed alternate documentation is satisfactory to demonstrate substantial conformance with the intent of the proposed green building measure.

    [HCD] Documentation of conformance for applicable green building measures shall be provided to the enforcing agency. All projects shall submit a completed Residential Occupancies Application Checklist that includes Chapter 4 residential mandatory measures and Tier 1 or Tier 2, as applicable. References to the measure-specific documentation used to show compliance shall be included. Alternate methods of documentation shall be acceptable when the enforcing agency finds that the proposed alternate documentation is satisfactory to demonstrate substantial conformance with the intent of the proposed green building measure.

    Note: HCD’s Residential Occupancies Application Checklist that includes the minimum criteria for documentation is available at: http://www.hcd.ca.gov/building-standards/calgreen/cal-green-forms.shtml.

    SECTION 103—BUILDING STANDARDS COMMISSION

    103.1 BSC-CG. Specific scope of application of the agency responsible for enforcement, the enforcement agency, and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

    1. Application— All occupancies where no state agency has the authority to adopt green building standards applicable to those occupancies. Enforcing agency— State or local agency specified by the applicable provisions of law. Authority cited— Health and Safety Code Sections 18930.5(a), 18938 and 18940.5. Reference— Health and Safety Code, Division 13, Part 2.5, commencing with Section 18901.
    2. Graywater systems. The construction, installation and alteration of graywater systems for indoor and outdoor uses in nonresidential occupancies. Application— All occupancies where no state agency has the authority to adopt green building standards applicable to those occupancies. Enforcing agency— State or local agency specified by the applicable provisions of law. Authority cited— Health and Safety Code Section 18941.8. Reference— Health and Safety Code Section 18941.8.

    103.1.1 Adopting agency identification. The provisions of this code applicable to buildings identified in this section will be identified in the Matrix Adoption Tables under the acronym BSC-CG.

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    ADMINISTRATION

  • CALGreen § 18941.8. High relevance — show source text

    Authority Cited – Health & Safety Code Section 18941.8.

    Reference – Health & Safety Code Section 18941.8.

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

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

    1.2.3.2 Tests. Whenever there is insufficient evidence of compliance with the provisions of this code, or evidence that a material or method does not conform to the requirements of this code, or in order to substantiate claims for alternative materials or methods, the building official shall have the authority to require tests as evi- dence of compliance to be made at no expense to the jurisdiction. Test methods shall be as specified in this code or by other recognized test standards. In the absence of recognized and accepted test methods, the building official shall approve the testing procedures. Tests shall be performed by an approved agency. Reports of such tests shall be retained by the building official for the period required for retention of public records.

    1.3.0 Board of State and Community Corrections.

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

    Application – Local detention facilities.

    Enforcing Agency – Board of State and Community Cor- rections.

    Authority Cited – Penal Code Section 6030; Welfare and Institutions Code Sections 210 and 885.

    References – Penal Code Section 6030; Welfare and Institutions Code Sections 210 and 885.

    6 2025 CALIFORNIA PLUMBING CODE

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    DIVISION I CALIFORNIA ADMINISTRATION

    1.3.2 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this section will be identified in the Matrix Adoption Tables under the acronym BSCC.

    1.4.0 Department of Consumer Affairs.

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

    Board of Barbering and Cosmetology.

  • 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 § 2.2 High relevance — show source text

    R104.2.2 Alternative materials, design and methods of construction and equipment. The provisions of this code are not intended to prevent the installation of any material or to prohibit any design or method of construction not specifically prescribed by this code, provided that any such alternative has been approved.

    R104.2.2.1 Approval authority. An alternative material, design or method of construction shall be approved where the building official finds that the proposed alternative is satisfactory and complies with Sections R104.2.2 through R104.2.2.6.2, as applicable.

    R104.2.2.2 Application and disposition. Where required, a request to use an alternative material, design or method of construction shall be submitted in writing to the building official for approval. Where the alternative material, design or method of construction is not approved, the building official shall respond in writing, stating the reasons the alternative was not approved.

    R104.2.2.3 Compliance with code intent. An alternative material, design or method of construction shall comply with the intent of the provisions of this code.

    R104.2.2.4 Equivalency criteria. An alternative material, design or method of construction shall, for the purpose intended, be not less than the equivalent of that prescribed in this code with respect to all the following, as applicable:

    1. Quality.

    2. Strength.

    3. Effectiveness.

    4. Durability.

    5. Safety, other than fire safety.

    6. Fire safety.

    R104.2.2.5 Tests. Tests conducted to demonstrate equivalency in support of an alternative material, design or method of construction application shall be of a scale that is sufficient to predict performance of the end use configuration. Such tests shall be performed by a party acceptable to the building official.

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    DIVISION II SCOPE AND ADMINISTRATION

    R104.2.2.6 Reports. Supporting documentation, where necessary to assist in the approval of materials or assemblies not specifically provided for in this code, shall comply with Sections R104.2.2.6.1 and R104.2.2.6.2.

    R104.2.2.6.1 Evaluation reports. Evaluation reports shall be issued by an approved agency and use of the evaluation report shall require approval by the building official for the installation. The alternate material, design or method of construction and product evaluated shall be within the scope of the building official’s recognition of the approved agency. Criteria used for the evaluation shall be identified within the report and, where required, provided to the building official.

    R104.2.2.6.2 Other reports. Reports not complying with Section R104.2.2.6.1 shall describe criteria, including but not limited to any referenced testing or analysis, used to determine compliance with code intent and justify code equivalence. The report shall be prepared by a qualified engineer, specialist, laboratory or specialty organization acceptable to the building official. The building official is authorized to require design submittals to be prepared by, and bear the stamp of, a registered design professional.

  • CALGreen § 7-104 High relevance — show source text
    1. Section 7-104 in the California Administrative Code for the Office of the Statewide Health Planning and Development.

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    ADMINISTRATION

    101.9 Effective date of this code. Only those standards approved by the California Building Standards Commission that are effective at the time an application for a building permit is submitted shall apply to the plans and specifications for, and to the construction performed under, that permit. For the effective dates of the provisions contained in this code, see the appropriate application checklist and the History Note page of this code.

    101.10 Mandatory requirements. This code contains both mandatory and voluntary green building measures. Mandatory and voluntary measures are identified in the appropriate application checklist contained in this code.

    101.11 Effective use of this code. The following steps shall be used to establish which provisions of this code are applicable to a specific occupancy:

    1. Establish the type of occupancy.
    2. Verify which state agency has authority for the established occupancy by reviewing the authorities list in Sections 103 through 106.
    3. Once the appropriate agency has been identified, find the chapter which covers the established occupancy.
    4. The Matrix Adoption Tables at the beginning of Chapters 4 and 5 identify the mandatory green building measures necessary to meet the minimum requirements of this code for the established occupancy.
    5. Voluntary tier measures are contained in Appendix Chapters A4 and A5. A checklist containing each green building measure, both required and voluntary, is provided at the end of each appendix chapter. Each measure listed in the application checklist has a section number which correlates to a section where more information about the specific measure is available.
    6. The application checklist identifies which measures are required by this code and allows users to check off which voluntary items have been selected to meet voluntary tier levels if desired or mandated by a city, county, or city and county.

    SECTION 102—CONSTRUCTION DOCUMENTS AND INSTALLATION VERIFICATION

    102.1 Submittal documents. Construction documents and other data shall be submitted in one or more sets with each application for a permit. Where special conditions exist, the enforcing agency is authorized to require additional construction documents to be prepared by a licensed design professional and may be submitted separately.

    Exception: The enforcing agency is authorized to waive the submission of construction documents and other data not required to be prepared by a licensed design professional.

    102.2 Information on construction documents. Construction documents shall be of sufficient clarity to indicate the location, nature and scope of the proposed green building feature and show that it will conform to the provisions of this code, the California Building Standards Code and other relevant laws, ordinances, rules and regulations as determined by the enforcing agency.

    102.3 Verification. Documentation of conformance for applicable green building measures shall be provided to the enforcing agency. Alternate methods of documentation shall be acceptable when the enforcing agency finds that the proposed alternate documentation is satisfactory to demonstrate substantial conformance with the intent of the proposed green building measure.

    [HCD] Documentation of conformance for applicable green building measures shall be provided to the enforcing agency. All projects shall submit a completed Residential Occupancies Application Checklist that includes Chapter 4 residential mandatory measures and Tier 1 or Tier 2, as applicable. References to the measure-specific documentation used to show compliance shall be included. Alternate methods of documentation shall be acceptable when the enforcing agency f

  • CALGreen § 4-11 High relevance — show source text

    (Equation A4.4-11) Weight of material (percent) = [Weight of material (lbs) ÷ Weight of assembly (lbs)] × 100 (See Equation A4.4-7) RC M (percent) = Postconsumer content percentage + ( [1] / 2 ) Preconsumer content percentage

    Method 2: Recycled content (postconsumer and preconsumer) provided in pounds

    (Equation A4.4-12) PRC M (percent) = [RC M (lbs) ÷ Weight of material (lbs)] × 100 (Equation A4.4-13) RC M (lbs) = Postconsumer content (lbs) + ( [1] / 2 ) Preconsumer content (lbs)

    Note: If the manufacturer reports total recycled content of a material as one percentage in lieu of separately reporting preconsumer and postconsumer values, the total shall be considered preconsumer recycled material.

    A4.405.3.1.5 Alternate method for concrete. When Supplementary Cementitious Materials (SCMs), such as fly ash or ground blast furnace slag cement, are used in concrete, an alternate method of calculating and reporting recycled content in concrete products shall be permitted. When determining the recycled content value, the percent recycled content shall be multiplied by the cost of the cementitious materials only, not the total cost of the concrete.

    A4.405.4 Use of building materials from rapidly renewable sources. One or more of the following materials manufactured from rapidly renewable sources or agricultural by-products is used:

    1. Insulation.

    2. Bamboo or cork.

    3. Engineered products.

    4. Agricultural based products.

    5. Other products acceptable to the enforcing agency.

    Note: The intent of this section is to utilize building materials and products which are typically harvested within a 10-year or shorter cycle.

    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.

  • CALGreen § 1.11.2.3 High relevance — show source text

    1.11.2.3 More restrictive fire and panic safety building standards.

    1.11.2.3.1 Any fire protection district organized pursuant to Health and Safety Code Part 2.7 (commencing with Section 13800) of Division 12 may adopt building standards relating to fire and panic safety that are more stringent than those building standards adopted by the State Fire Marshal and contained in the California Building Standards Code. For these purposes, the district board shall be deemed a legislative body and the district shall be deemed a local agency. Any changes or modifications that are more stringent than the requirements published in the California Building Standards Code relating to fire and panic safety shall be subject to Section 1.1.8.1.

    1.11.2.3.2 Any fire protection district that proposes to adopt an ordinance pursuant to this section shall, not less than 30 days prior to noticing a proposed ordinance for public hearing, provide a copy of that ordinance, together with the adopted findings made pursuant to Section 1.11.2.3.1, to the city, county, or city and county where the ordinance will apply. The city, county, or city and county may provide the district with written comments, which shall become part of the fire protection district’s public hearing record.

    1.11.2.3.3 The fire protection district shall transmit the adopted ordinance to the city, county, or city and county where the ordi- nance will apply. The legislative body of the city, county, or city and county may ratify, modify or deny an adopted ordinance and transmit its determination to the district within 15 days of the determination. Any modification or denial of an adopted ordinance shall include a written statement describing the reasons for any modifications or denial. No ordinance adopted by the district shall be effective until ratification by the city, county, or city and county where the ordinance will apply. Upon ratification of an adopted ordinance, the city, county or city and county shall file a copy of the findings of the district, and any findings of the city, county, or city and county, together with the adopted ordinance expressly marked and identified to which each finding refers, in accordance with Section 1.1.8.1(3).

    1.11.2.4 Request for alternate means of protection. Requests for approval to use an alternative material, assembly or materials, equipment, method of construction, method of installation of equipment or means of protection shall be made in writing to the enforcing agency by the owner or the owner’s authorized representative and shall be accompanied by a full statement of the condi- tions. Sufficient evidence or proof shall be submitted to substantiate any claim that may be made regarding its conformance. The enforcing agency may require tests and the submission of a test report from an approved testing organization as set forth in Title 19, California Code of Regulation, to substantiate the equivalency of the proposed alternative means of protection.

    When a request for alternate means of protection involves hazardous materials, the authority having jurisdiction may consider implementation of the findings and recommendations identified in a Risk Management Plan (RMP) developed in accordance with Title 19, Division 5, Chapter 2, Article 3.

    Approval of a request for use of an alternative material, assembly of materials, equipment, method of construction, method of installation of equipment or means of protection made pursuant to these provisions shall be limited to the particular case covered by request and shall not be construed as establishing any precedent for any future request.

  • 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.

    APPENDIX A4-18 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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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 § 17.2.5.4. High relevance — show source text

    3. Special reinforced concrete moment frames—Not permitted by OSHPD.

    Exceptions: 1. Systems listed in this section can be used as an alternative system when preapproved by the enforcement agency. 2. Rooftop or other supported structures not exceeding two stories in height and 10 percent of the total structure weight can use the systems in this section when designed as components per ASCE 7, Chapter 13. 3. Systems listed in this section can be used for seismically isolated buildings, when permitted by ASCE 7, Section 17.2.5.4.

    1617A.1.5 Reserved.

    1617A.1.6 Reserved.

    1617A.1.7 ASCE 7, Section 12.2.5.6.1 [DSA-SS] The exception after the first paragraph is not permitted by DSA-SS.

    1617A.1.8 ASCE 7, Section 12.2.5.7.1 [DSA-SS] The exception after the first paragraph is not permitted by DSA-SS.

    1617A.1.9 ASCE 7, Section 12.2.5.7.2 [DSA-SS] The exception after the first paragraph is not permitted by DSA-SS.

    1617A.1.10 ASCE 7, Section 12.3.3.1. Replace ASCE 7, Section 12.3.3.1 by the following:

    12.3.3.1 Prohibited vertical irregularities for Seismic Design Categories D through F. Structures assigned to Seismic Design Category D, E or F that have vertical irregularities Type 1b, 4a or 4b of Table 12.3-2 shall not be permitted.

    Exception: Structures assigned to Seismic Design Category D, E or F that have vertical irregularity Type 4a shall be permitted where the story lateral strength is not less than 80% of that in the story above.

    1617A.1.11 ASCE 7, Section 12.7.2. Modify ASCE 7, Section 12.7.2, by adding Item 7 to read as follows: 7. Where buildings provide lateral support for walls retaining earth, and the exterior grades on opposite sides of the building differ by more than 6 feet (1829 mm), the load combination of the seismic increment of earth pressure due to earthquake acting on the higher side, as determined by a geotechnical engineer qualified in soils engineering plus the difference in earth pressures shall be added to the lateral forces provided in this section.

    1617A.1.12 ASCE 7, Section 12.10.2.1. Replace Exception to ASCE 7, Section 12.10.2.1 by the following:

    Exception: In light-frame structures or portions thereof braced entirely by wood light-frame shear walls, collector elements and their connections, including connections to vertical elements, need only be designed to resist forces using the load combinations of Section 2.3.6 with seismic forces determined in accordance with Section 12.10.1.1.

    1617A.1.13 ASCE 7, Section 12.13.5.2. Modify ASCE 7, Section 12.13.5.2 by the following:

  • CALGreen § 1701.1 High relevance — show source text

    Chapter 16 Nonpotable Rainwater Catchment Systems.

    Chapter 16 regulates nonpotable rainwater catchment systems that include irrigation; toilet and urinal flushing with proper treatment; provisions where permits are required; maintenance of alternate water sources; and minimum water quality. This chapter provides guidance on how to optimize rainwater use while ensuring there is a decrease of risk to consumers from poor design, installation, and maintenance. Rainwater harvesting is the process of capturing, channeling, and storing water runoff for later use. Most systems are constructed of three principal components: the catchment area, the collection device, and the conveyance system.

    Chapter 17 Referenced Standards.

    Chapter 17 provides two comprehensive tables with referenced standards. The standards listed in Table 1701.1 are applied as indicated in the applicable reference section(s). A list of additional approved standards, publications, practices, and guides that are not referenced in specific sections appear in Table 1701.2.

    Referenced standards set forth specific details of accepted practices, materials specifications, or test methods in many specialized applications. Standards provide an efficient method of conveying complex information and specifications on the performance requirements for materials, products, systems, application, and installation. The manner and purpose for a standard’s use and, in turn, code compliance, must be definitive in all references to the standard. If the standard is intended to be a requirement for judging code compliance, the code must state its intent for use. The standard should adequately address a defined need and at the same time specify the minimum performance requirements, technical characteristics and methods of testing, and required test results.

    The referenced standards tables are organized in a manner that makes it easy to find specific standards in alphabetical order, and by acronym of the publishing agency of the standard. The tables list the title of the standard, the edition, and any addenda. Contact information for each publishing agency is provided at the end of the chapter.

    Appendix A Recommended Rules for Sizing the Water Supply System.

    Appendix A provides a method of sizing the water supply and distribution system that provides precise calculations to establish the proper pressures and flow to the system’s fixtures. The goal of sizing the system is to deliver an acceptable volume of water to the most hydraulically remote fixture during minimum pressure and maximum flow conditions; provide satisfactory water pressure to the most hydraulically remote fixture during minimum pressure and maximum flow conditions; and to prevent excessive water velocity during maximum flow conditions.

    Appendix B Explanatory Notes on Combination Waste and Vent Systems.

    Appendix B contains general guidelines for the design and installation of combination waste and vent systems. These systems are designed for waste piping and are purposely oversized to serve as both a waste and vent pipe to avoid excessive pneumatic effects at fixture drains.

    Appendix C Alternate Plumbing Systems.

    The intent of this appendix is to provide clarification of procedures for the design and approval of engineered plumbing systems, alternate materials, and equipment that are not specifically covered in other parts of the code. Alternative methods are allowed to be used where approved by the authority having jurisdiction. Approval of alternatives is based on a demonstration showing that the method or material used is at least equivalent in strength, deflection, and capacity to that provided by the prescriptive methods and materials.

    Appendix D Sizing Storm Water Drainage Systems.

    Appendix D provides general guidelines for the sizing of stormwater drainage systems. There are two pieces of information that must always be a given. They are the roof size and the rate of rainfall f

  • CALGreen § 4.408.3 High relevance — show source text

    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.

    2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 4-11

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

    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:

    1. Sample forms found in “A Guide to the California Green Building Standards Code (Residential)” located at http://www.hcd.ca.gov/building-standards/calgreen/cal-green-forms.html may be used to assist in documenting compliance with this section.
    2. Mixed construction and demolition debris (C&D) processors can be located at the California Department of Resources Recycling and Recovery (CalRecycle).

    SECTION 4.409—LIFE CYCLE ASSESSMENT (RESERVED)

    SECTION 4.410—BUILDING MAINTENANCE AND OPERATION

    4.410.1 Operation and maintenance manual. At the time of final inspection, a manual, compact disc, web-based reference or other media acceptable to the enforcing agency which includes all of the following shall be placed in the building:

    1. Directions to the owner or occupant that the manual shall remain with the building throughout the life cycle of the structure.

    2. Operation and maintenance instructions for the following: a. Equipment and appliances, including water-saving devices and systems, HVAC systems, photovoltaic systems, electric vehicle chargers, water-heating systems and other major appliances and equipment. b. Roof and yard drainage, including gutters and downspouts. c. Space conditioning systems, including condensers and air filters. d. Landscape irrigation systems.

    e. Water reuse systems. 3. Information from local utility, water and waste recovery providers on methods to further reduce resource consumption, including recycle programs and locations. 4. Public transportation and/or carpool options available in the area. 5. Educational material on the positive impacts of an interior relative humidity between 30–60 percent and what methods an occupant may use to maintain the relative humidity level in that range. 6. Information about water-conserving landscape and irrigation design and controllers which conserve water. 7. Instructions for maintaining gutters and downspouts and the importance of diverting water at least 5 feet away from the foundation.

  • CALGreen § 504.8.5.2 High relevance — show source text

    A6.504.8.5.2 Documentation. Verification of compliance with this section shall be provided as requested by the enforcing agency. Documentation shall include at least one of the following:

    1. Product certifications and specifications.
    2. Chain of custody certifications.
    3. Other methods acceptable to the enforcing agency.

    A6.504.9 Environmental tobacco smoke (ETS) control. [OSHPD 1, 2 & 4] Where outdoor areas are provided for smoking, prohibit smoking within 25 feet of building entries, outdoor air intakes and operable windows and within the building, if not already prohibited by other laws or regulations, or as enforced by ordinances, regulations or policies of any city, county, city and county, California Community College, campus of the California State University or campus of the University of California, whichever are more stringent. When ordinances, regulations or policies are not in place, post signage to inform building occupants of the prohibitions.

    SECTION A6.505 [OSHPD 1, 2 & 4]—INDOOR MOISTURE CONTROL

    A6.505.2 Indoor moisture control. Buildings shall meet or exceed the provisions of California Building Code, CCR, Title 24, Part 2, Sections 1203 and Chapter 14.

    APPENDIX A6.1-36 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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

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

    NONRESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST [OSHPD 1, 2 and 4]

    FEATURE OR MEASURE COMPLIANCE LEVELS Col3 Col4 NOTES
    FEATURE OR MEASURE Mandatory
    CALGreen    		 VOLUNTARY
    CALGreen    		 VOLUNTARY
    CALGreen    		 VOLUNTARY
    CALGreen
    FEATURE OR MEASURE Mandatory
    CALGreen    		 Tier 1 Tier 2 Tier 2
    DIVISION A6.1 – PLANNING AND DESIGN
    SECTION Site Development SECTION Site Development SECTION Site Development SECTION Site Development SECTION Site Development
    **A6.106.9 Building orientation.**Locate and orient the building as follows:
    1. When site and location permit, orient the building with the long sides facing north and
    south.
    2. Protect the building from thermal loss, drafts and degradation of the building envelope
    caused by wind and wind-driven materials such as dust.
    DIVISION A6.2 – ENERGY EFFICIENCY
    SECTION A6.203 Performance Measures SECTION A6.203 Performance Measures SECTION A6.203 Performance Measures SECTION A6.203 Performance Measures SECTION A6.203 Performance Measures
    A6.203.1 Energy performance. [OSHPD 1]
    **A6.203.1.1 CALGreen Tier 1.

Frequently asked questions

Can I just hand the enforcing agency a vendor statement and skip weight tickets?

No. A vendor brochure or unsigned statement is usually insufficient. The enforcing agency must find your alternate documentation satisfactory; they commonly expect verifiable evidence such as weight tickets, third‑party verification, test reports, or evaluation reports per § 102.3.

Do I need to get pre‑approval before submitting alternate documentation?

You should coordinate with the enforcing agency early. While not every jurisdiction requires formal pre‑approval, early communication avoids plan‑check rejections — the agency is the decision maker under § 102.3.

If the enforcing agency approves an alternate, is that precedent for other projects?

No. Authority to accept alternates is typically limited to the particular case and is evaluated case‑by‑case; approval does not necessarily establish precedent. The building and fire codes emphasize case‑by‑case approvals and may limit broader precedent.

Are there CALGreen checklist requirements for residential projects?

Yes — HCD requires a completed Residential Occupancies Application Checklist and references to the measure‑specific documentation; alternates are acceptable only when the enforcing agency finds them satisfactory. § 102.3 [HCD].

What if my alternate requires testing or an evaluation report?

Be prepared to pay for tests or to submit evaluation reports from approved agencies; the building official or enforcing agency may require tests to substantiate equivalency. See CBC and Residential Code procedures for alternates.

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