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Earlier editions: 20222019

Appendix A4

Section A4.602 — RESIDENTIAL OCCUPANCIES APPLICATION CHECKLIST—continued

California Green Building Standards Code (Title 24, Part 11) · 2025 edition · updated 2026-09-12 · 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
WATER EFFICIENCY AND CONSERVATION
Indoor Water Use
4.303.1Plumbing fixtures (water closets and urinals) and fittings
(showerheads, faucets and pre-rinse spray valves) installed in
residential buildings shall comply with the prescriptive requirements
of Sections 4.303.1.1 through 4.303.1.4.5.
4.303.2 Submeters for multifamily building and dwelling units in
mixed-use residential/commercial buildings. Submeters shall be
installed to measure water usage of individual rental dwelling units in
accordance with the_California Plumbing Code._
4.303.3Plumbing fixtures and fittings required in Section 4.303.1
shall be installed in accordance with the_California Plumbing Code,_
and shall meet the applicable referenced standards.
A4.303.1The maximum flow rate of kitchen faucets shall not exceed
1.5 gallons per minute at 60 psi. Kitchen faucets may temporarily
increase the flow above the maximum rate, but not to exceed 2.2
gallons per minute at 60 psi, and must default to a maximum flow rate
of 1.5 gallons per minute at 60 psi.
**Note:**Where complying faucets are unavailable, aerators or other
means may be used to achieve reduction.
4.303.1.4.3 Metering faucets in residential buildings shall not deliver
more than 0.2 gallons per cycle.
A4.303.2Alternate water source for nonpotable applications.
Alternate nonpotable water sources are used for indoor potable water
reduction. Alternate nonpotable water sources shall be installed in
accordance with the_California Plumbing Code._
A4.303.3 Install at least one qualified ENERGY STAR dishwasher or
clothes washer.




A4.303.4Nonwater urinals or waterless toilets are installed. ~~~~ ~~~~ ~~~~ ~~~~ ~~~~
A4.303.5One- and two-family dwellings shall be equipped with a
demand hot water recirculation system.
Outdoor Water Use
4.304.1 Residential developments shall comply with a local water
efficient landscape ordinance or the current California Department of
Water Resources’ Model Water Efficient Landscape Ordinance
(MWELO), whichever is more stringent.
A4.304.1A rainwater capture, storage and re-use system is designed
and installed.
A4.304.2A landscape design is installed, which does not utilize
potable water.
A4.304.3 For new water service connections, landscaped irrigated
areas less than 5,000 square feet shall be provided with separate
submeters or metering devices for outdoor potable water use.
Water Reuse Systems
A4.305.1Piping is installed to permit future use of a graywater
irrigation system served by the clothes washer or other fixtures.




A4.305.2 Recycled water piping is installed. ~~~~
 ~~~~
 ~~~~
 ~~~~
 ~~~~
A4.305.3Recycled water is used for landscape irrigation. ~~~~ ~~~~ ~~~~ ~~~~ ~~~~
Innovative Concepts and Local Environmental Conditions
A4.306.1Items in this section are necessary to address innovative
concepts or local environmental conditions.
Item 1 ~~~~
 ~~~~
 ~~~~
 ~~~~
 ~~~~
 ~~~~
Item 2 ~~~~
 ~~~~
 ~~~~
 ~~~~
 ~~~~
 ~~~~
Item 3 ~~~~ ~~~~ ~~~~ ~~~~ ~~~~ ~~~~

APPENDIX A4-26 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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

APPENDIX A4 — RESIDENTIAL VOLUNTARY MEASURES

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▸Contents — California Green Building Standards Code (Title 24, Part 11)
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
  17. ▸Appendix A4
    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…
  18. Appendix A5
  19. Appendix A6

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