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Chapter 8 — COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL

Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST—continued

2025 California Green Building Standards Code (Title 24, Part 11) · 2025 edition · updated 2026-07-25 · California

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

All
Installer or
Designer

All
Third
party

All
FEATURE OR MEASURE Mandatory Tier 1 Tier 2 Tier 2 Tier 2 Tier 2
A4.504.1Use composite wood products made with either California
Air Resources Board approved no-added formaldehyde (NAF) resins
or ultra-low emitting formaldehyde (ULEF) resins.



A4.504.2Install VOC compliant resilient flooring systems.
Tier 1. At least 90 percent of the resilient flooring installed shall comply.
**Tier 2.**100 percent of the resilient flooring installed shall comply.
2 2 ~~~~
~~~~
~~~~
A4.504.3Thermal insulation installed in the building shall meet the
following requirements:
Tier 1. Install thermal insulation in compliance with VOC limits.
Tier 2. Install insulation which contains no-added formaldehyde
(NAF) and is in compliance with Tier 1.
2 2 ~~~~ ~~~~ ~~~~
Interior Moisture Control
4.505.2Vapor retarder and capillary break is installed at slab-on-
grade foundations.
4.505.3 Moisture content of building materials used in wall and floor
framing is checked before enclosure.
Indoor Air Quality and Exhaust
4.506.1 Each bathroom shall be provided with the following:
1. ENERGY STAR fans ducted to terminate outside the building.
2. Fans must be controlled by a humidity control (separate or built-
in); OR functioning as a component of a whole-house ventilation
system.
3. Humidity controls with manual or automatic means of
adjustment, capable of adjustment between a relative humidity
range of≤ 50 percent to a maximum of 80 percent.



A4.506.1 Reserved. ~~~~ ~~~~ ~~~~ ~~~~ ~~~~
A4.506.2 [HR] Provide filters on return air openings rated MERV 8 or
higher during construction when it is necessary to use HVAC
equipment.
A4.506.3 Direct-vent appliances shall be used when equipment is
located in conditioned space; or the equipment must be installed in
an isolated mechanical room.
Environmental Comfort
4.507.2 Duct systems are sized, designed and equipment is selected
using the following methods:
1. Establish heat loss and heat gain values according to ANSI/ACCA 2
Manual J-2016 or equivalent.
2. Size duct systems according to ANSI/ACCA 1 Manual D-2016
or equivalent.
3. Select heating and cooling equipment according to ANSI/ACCA 3
Manual S-2014 or equivalent.
Outdoor Air Quality
Reserved
Innovative Concepts and Local Environmental Conditions
A4.509.1 Items in this section are necessary to address innovative
concepts or local environmental conditions.
Item 1 ~~~~
~~~~
~~~~
~~~~
~~~~
Item 2 ~~~~
~~~~
~~~~
~~~~
~~~~
Item 3 ~~~~ ~~~~ ~~~~ ~~~~ ~~~~
Installer and Special Inspector Qualifications
Qualifications Qualifications Qualifications Qualifications Qualifications Qualifications Qualifications
702.1 HVAC system installers are trained and certified in the proper
installation of HVAC systems.
702.2 Special inspectors employed by the owner or owner's agent
must be qualified and able to demonstrate competence in the
discipline they are inspecting to the enforcing agency.
Verifications
703.1Verification of compliance with this code may include
construction documents, plans, specifications builder or installer
certification, inspection reports or other methods acceptable to the
enforcing agency which show substantial conformance.
FEATURE OR MEASURE LEVELS
APPLICANT TO SELECT ELECTIVE MEASURES
VERIFICATIONS
ENFORCING AGENCY TO SPECIFY
VERIFICATION METHOD
1. Green building measures listed in this table may be mandatory if adopted by a city, county, or city and county as specified in Section 101.7.
2. Required prerequisite for this Tier.
3. These measures are currently required elsewhere in statute or in regulation.

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APPENDIX A4-30 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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DIVISION A4.7 – RESIDENTIAL MODEL ORDINANCE

A4.701.1 General. The voluntary measures of this code are designed and promulgated to be adopted by reference and made mandatory by local ordinance pursuant to Section 101.7. Jurisdictions wishing to adopt the voluntary provisions of this code as an enforceable regulation governing structures and premises should ensure that certain factual information is included in the adopting ordinance and that the measures are appropriate and achievable and are considered to be suitable as mandatory by the city, county, or city and county. The following sample adoption ordinance addresses several key elements of a code adoption ordinance, including the information required for insertion into the code text.

This code does not limit the authority of city, county, or city and county government to make necessary changes to the provisions contained in this code.

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

ATTACHMENT___.

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

CITY OF ________________________

RESOLUTION # __________________

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

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

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

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

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

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

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

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

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

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

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

ADOPTED BY THE FOLLOWING VOTE:

AYES:

NOES:

ABSENT:

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APPENDIX A4-32 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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CALIFORNIA GREEN BUILDING STANDARDS CODE – MATRIX ADOPTION TABLE

APPENDIX A5 – NONRESIDENTIAL VOLUNTARY MEASURES

DIVISION A5.1 – PLANNING AND DESIGN

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

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

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APPENDIX A5-2 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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

A5 NONRESIDENTIAL VOLUNTARY MEASURES

The measures contained in this appendix are not mandatory unless adopted by a city, county, or city and county as specified in Section 101.7 and provide additional measures that designers, builders and property owners may wish to consider during the planning, design and construction process.

DIVISION A5.1 – PLANNING AND DESIGN

PREFACE

Given that land use and planning are largely regulated locally, cities, counties and cities and counties should consider reducing greenhouse gas emissions associated with development through local land-use practices in conjunction with enforcing the provisions of this code. Specific land use strategies a city, county or city and county may wish to consider include but are not limited to the following:

Site selection. Develop sites for buildings, hardscape, roads or parking areas consistent with the local general plan and regional transportation plan pursuant to SB 375 (Stats. 2008, Ch. 728).

Regional sustainable communities strategy. Site selection and building design and use shall conform the project with the prevailing regional sustainable communities strategy or alternative planning strategy, whichever meets the greenhouse gas target established by the California Air Resources Board pursuant to SB375 (Stats. 2008, Ch. 728), including the general location of uses, residential densities and building intensities.

Transit priority projects. To qualify as a transit priority project, the project shall meet three criteria:

(1) (a) contain at least 50 percent residential use, based on total building square footage and, if the project contains between 26 and 50 percent nonresidential uses, a floor area ratio of not less than 0.75; (b) provide a minimum net density of at least 20 dwelling units per acre; and (c) be within one-half mile of a major transit stop or high-quality transit corridor included in a regional transportation plan as described in Section 21155 of Stats. 2008, Ch. 728;

(2) be consistent with the prevailing sustainable communities strategy or alternative planning strategy, whichever meets the greenhouse gas target established by the California Air Resources Board, including the general location of uses, residential densities and building intensities; and

(3) have all necessary entitlements required by the applicable local government.

Note: For additional information, see Government Code Sections 65080, 65080.1 and 65400 and Public Resources Code Sections 21061.3 and 21155.

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Contents — 2025 California Green Building Standards Code (Title 24, Part 11)
2025 California Green Building Standards Code (Title 24, Part 11)
  1. Chapter 1 — ADMINISTRATION
  2. Chapter 2 — DEFINITIONS
  3. Chapter 3 — GREEN BUILDING
  4. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  5. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  6. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  7. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  8. Chapter 4 — RESIDENTIAL MANDATORY MEASURES
  9. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  10. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  11. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  12. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  13. Chapter 5 — NONRESIDENTIAL MANDATORY MEASURES
  14. Chapter 6 — REFERENCED ORGANIZATIONS AND STANDARDS
  15. Chapter 7 — INSTALLER AND SPECIAL INSPECTOR QUALIFICATIONS
  16. Chapter 8 — COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL
    Overview
    1. Section A4.101 — GENERAL
    2. Section A4.102 — DEFINITIONS
    3. Section A4.103 — SITE SELECTION
    4. Section A4.104 — SITE PRESERVATION
    5. Section A4.105 — DECONSTRUCTION AND REUSE OF EXISTING MATERIALS
    6. Section A4.106 — SITE DEVELOPMENT
    7. Section A4.107
    8. Section A4.108 — INNOVATIVE CONCEPTS AND LOCAL ENVIRONMENTAL C…
    9. Section A4.201 — GENERAL
    10. Section A4.202 — DEFINITIONS
    11. Section A4.203 — PERFORMANCE APPROACH FOR NEWLY CONSTRUCTED BU…
    12. Section A4.204 — REQUIREMENTS FOR ALTERATIONS TO EXISTING BUIL…
    13. Section A4.301 — GENERAL
    14. Section A4.302 — DEFINITIONS
    15. Section A4.303 — INDOOR WATER USE
    16. Section A4.304 — OUTDOOR WATER USE
    17. Section A4.305 — WATER REUSE SYSTEMS
    18. Section A4.306 — INNOVATIVE CONCEPTS AND LOCAL ENVIRONMENTAL C…
    19. Section A4.401 — GENERAL
    20. Section A4.402 — DEFINITIONS
    21. Section A4.403 — FOUNDATION SYSTEMS
    22. Section A4.404 — EFFICIENT FRAMING TECHNIQUES
    23. Section A4.405 — MATERIAL SOURCES
    24. Section A4.406 — ENHANCED DURABILITY AND REDUCED MAINTENANCE
    25. Section A4.407 — WATER RESISTANCE AND MOISTURE MANAGEMENT
    26. Section A4.408 — CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RE…
    27. Section A4.409 — LIFE CYCLE ASSESSMENT
    28. Section A4.410 — BUILDING MAINTENANCE AND OPERATION
    29. Section A4.411 — INNOVATIVE CONCEPTS AND LOCAL ENVIRONMENTAL C…
    30. Section A4.501 — GENERAL
    31. Section A4.502 — DEFINITIONS
    32. Section A4.503 — FIREPLACES
    33. Section A4.504 — POLLUTANT CONTROL
    34. Section A4.505 — INTERIOR MOISTURE CONTROL
    35. Section A4.506 — INDOOR AIR QUALITY AND EXHAUST
    36. Section A4.507 — ENVIRONMENTAL COMFORT
    37. Section A4.508 — OUTDOOR AIR QUALITY
    38. Section A4.509 — INNOVATIVE CONCEPTS AND LOCAL ENVIRONMENTAL C…
    39. Section A4.601 — GENERAL
    40. Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST
    41. Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST…
    42. Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST…
    43. Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST…
    44. Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST…
    45. Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST…
    46. Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST…
    47. Section A5.101 — GENERAL
    48. Section A5.102 — DEFINITIONS
    49. Section A5.103 — SITE SELECTION
    50. Section A5.104 — SITE PRESERVATION
    51. Section A5.105 — DECONSTRUCTION AND REUSE OF EXISTING STRUCTURES
    52. Section A5.106 — SITE DEVELOPMENT
    53. Section A5.107 — BIRD-FRIENDLY BUILDING DESIGN
    54. Section A5.201 — GENERAL
    55. Section A5.202 — DEFINITIONS
    56. Section A5.203 — PERFORMANCE APPROACH
    57. Section A5.204 — MANDATORY REQUIREMENTS FOR ALTERATIONS TO EXI…
    58. Section A5.211 — RESERVED
    59. Section A5.212 — ELEVATORS, ESCALATORS AND OTHER EQUIPMENT
    60. Section A5.213 — ENERGY EFFICIENT FRAMING
    61. Section A5.301 — GENERAL
    62. Section A5.302 — DEFINITIONS
    63. Section A5.303 — INDOOR WATER USE
    64. Section A5.304 — OUTDOOR WATER USE
    65. Section A5.305 — WATER REUSE
    66. Section A5.401 — GENERAL
    67. Section A5.402 — DEFINITIONS
    68. Section A5.403 — FOUNDATION SYSTEMS
    69. Section A5.404 — EFFICIENT FRAMING TECHNIQUES
    70. Section A5.405 — MATERIAL SOURCES
    71. Section A5.406 — ENHANCED DURABILITY AND REDUCED MAINTENANCE
    72. Section A5.408 — CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RE…
    73. Section A5.409 — LIFE CYCLE ASSESSMENT
    74. Section A5.501 — GENERAL
    75. Section A5.502 — DEFINITIONS
    76. Section A5.504 — POLLUTANT CONTROL
    77. Section A5.507 — ENVIRONMENTAL COMFORT
    78. Section A5.508 — OUTDOOR AIR QUALITY
    79. Section A6.106 — SITE DEVELOPMENT
    80. Section A6.202 — DEFINITIONS
    81. Section A6.203 — PERFORMANCE APPROACH
    82. Section A6.204 — PRESCRIPTIVE APPROACH
    83. Section A6.205 — [OSHPD 1 & 4]—BUILDING ENVELOPE
    84. Section A6.207 — [OSHPD 1, 2 & 4]—HVAC DESIGN, EQUIPMENT AND I…
    85. Section A6.210 — [OSHPD 1, 2 & 4]—APPLIANCES
    86. Section A6.401 — GENERAL
    87. Section A6.407 — [OSHPD 1, 2 & 4]—WATER RESISTANCE AND MOISTUR…
    88. Section A6.408 — CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RE…
    89. Section A6.410 — BUILDING MAINTENANCE AND OPERATION
    90. Section A6.504 — POLLUTANT CONTROL
    91. Section A6.505 — [OSHPD 1, 2 & 4]—INDOOR MOISTURE CONTROL

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