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Earlier editions: 20222019

Appendix A5

Section A5.304 — OUTDOOR WATER USE

California Green Building Standards Code (Title 24, Part 11) · 2025 edition · updated 2026-09-12 · California

A5.304.1 Reserved.

A5.304.2 Outdoor water use. For new water service not subject to the provisions of Water Code Section 535, separate meters or submeters shall be installed for indoor and outdoor potable water use for landscaped areas of at least 500 square feet but not more than 1,000 square feet.

A5.304.6 Restoration of areas disturbed by construction. Restore all landscape areas disturbed during construction by planting with local adaptive and/or noninvasive vegetation.

A5.304.7 Previously developed sites. On previously developed or graded sites, restore or protect at least 50 percent of the site area with adaptive and/or noninvasive vegetation. Projects complying with Section A5.106.3, Item 3 may apply vegetated roof surface to this calculation if the roof plants meet the definition of adaptive and noninvasive.

Exception: Area of the building footprint is excluded from the calculation.

A5.304.8 Graywater irrigation system. Install a graywater collection system for onsite subsurface irrigation using graywater collected from bathtubs, showers, bathroom wash basins and laundry water. See California Plumbing Code.

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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
  18. ▸Appendix A5
    Overview
    1. Section A5.101 — GENERAL
    2. Section A5.102 — DEFINITIONS
    3. Section A5.103 — SITE SELECTION
    4. Section A5.104 — SITE PRESERVATION
    5. Section A5.105 — DECONSTRUCTION AND REUSE OF EXISTING STRUCTURES
    6. Section A5.106 — SITE DEVELOPMENT
    7. Section A5.107 — BIRD-FRIENDLY BUILDING DESIGN
    8. Section A5.201 — GENERAL
    9. Section A5.202 — DEFINITIONS
    10. Section A5.203 — PERFORMANCE APPROACH
    11. Section A5.204 — MANDATORY REQUIREMENTS FOR ALTERATIONS TO EXI…
    12. Section A5.211 — RESERVED
    13. Section A5.212 — ELEVATORS, ESCALATORS AND OTHER EQUIPMENT
    14. Section A5.213 — ENERGY EFFICIENT FRAMING
    15. Section A5.301 — GENERAL
    16. Section A5.302 — DEFINITIONS
    17. Section A5.303 — INDOOR WATER USE
    18. Section A5.304 — OUTDOOR WATER USE
    19. Section A5.305 — WATER REUSE
    20. Section A5.401 — GENERAL
    21. Section A5.402 — DEFINITIONS
    22. Section A5.403 — FOUNDATION SYSTEMS
    23. Section A5.404 — EFFICIENT FRAMING TECHNIQUES
    24. Section A5.405 — MATERIAL SOURCES
    25. Section A5.406 — ENHANCED DURABILITY AND REDUCED MAINTENANCE
    26. Section A5.408 — CONSTRUCTION WASTE REDUCTION, DISPOSAL AND RE…
    27. Section A5.409 — LIFE CYCLE ASSESSMENT
    28. Section A5.501 — GENERAL
    29. Section A5.502 — DEFINITIONS
    30. Section A5.504 — POLLUTANT CONTROL
    31. Section A5.507 — ENVIRONMENTAL COMFORT
    32. Section A5.508 — OUTDOOR AIR QUALITY
  19. Appendix A6

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