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Appendix A5

Section A5.105

California Green Building Standards Code (Title 24, Part 11) · 2019 edition · updated 2026-09-12 · California

DECONSTRUCTION AND REUSE

OF EXISTING STRUCTURES

A5.105.1 If feasible, disassemble existing buildings instead of demolishing to allow reuse or recycling of building materials.

A5.105.1.1 Existing building structure. Maintain at least 75 percent of existing building structure (including structural floor and roof decking) and envelope (exterior skin and framing) based on surface area.

Exceptions:

  1. Window assemblies and nonstructural roofing material.

  2. Hazardous materials that are remediated as a part of the project.

  3. A project with an addition of more than two times the square footage of the existing building.

A5.105.1.2 Existing nonstructural elements. Reuse existing interior nonstructural elements (interior walls, doors, floor coverings and ceiling systems) in at least 50 percent of the area of the completed building (including additions).

Exception: A project with an addition of more than two times the square footage of the existing building.

A5.105.1.3 Salvage. Salvage additional items in good condition such as light fixtures, plumbing fixtures and doors as follows. Document the weight or number of the items salvaged.

  1. Salvage for reuse on the project items that conform to other provisions of Title 24 in an on-site storage area.

  2. Nonconforming items may be salvaged in dedicated collection bins for exempt projects or other uses.

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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 5 — NONRESIDENTIAL MANDATORY MEASURES
  6. Chapter 6 — REFERENCED ORGANIZATIONS AND STANDARDS
  7. Chapter 7 — INSTALLER AND SPECIAL INSPECTOR QUALIFICATIONS
  8. Chapter 8 — COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL
  9. Appendix A4
  10. ▸Appendix A5
    Overview
    1. Section A5.101
    2. Section A5.102
    3. Section A5.103
    4. Section A5.104
    5. Section A5.105
    6. Section A5.106
    7. Section A5.201
    8. Section A5.202
    9. Section A5.203
    10. Section A5.211
    11. Section A5.212
    12. Section A5.213
    13. Section A5.301
    14. Section A5.302
    15. Section A5.303
    16. Section A5.304
    17. Section A5.305
    18. Section A5.401
    19. Section A5.402
    20. Section A5.403
    21. Section A5.404
    22. Section A5.405
    23. Section A5.406
    24. Section A5.408
    25. Section A5.409
    26. Section A5.501
    27. Section A5.502
    28. Section A5.504
    29. Section A5.507
    30. Section A5.508
    31. Section A5.601
    32. Section A5.106
    33. Section A5.202
    34. Section A5.203
    35. Section A5.204
    36. Section A5.205 — [OSHPD 1 & 4]
    37. Section A5.207 — [OSHPD 1, 2 & 4]
    38. Section A5.210 — [OSHPD 1, 2 & 4]
    39. Section A5.401
    40. Section A5.407 — [OSHPD 1, 2 & 4]
    41. Section A5.408
    42. Section A5.410
    43. Section A5.504
    44. Section A5.505 — [OSHPD 1, 2 & 4]

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