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Chapter 1 — ADMINISTRATION

Section 1.8.10 — OTHER BUILDING REGULATIONS

2025 California Residential Code (Title 24, Part 2.5) · 2025 edition · updated 2026-07-29 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

1.8.10.1 Existing structures. Notwithstanding other provisions of law, the replacement, retention and extension of original materials, and the use of original methods of construction for any existing building or accessory structure, or portions thereof, shall be permitted in accor- dance with the provisions of this code and the California Existing Building Code, as adopted by the Department of Housing and Community Development. For additional information, see California Health and Safety Code, Sections 17912, 17920.3, 17922 and 17958.8.

1.8.10.2 Moved structures. Subject to the requirements of California Health and Safety Code Sections 17922, 17922.3 and 17958.9, local ordinances or regulations relating to a moved residential building or accessory structure thereto, shall permit the replacement, reten- tion and extension of original materials, and the use of original methods of construction so long as the structure does not become or continue to be a substandard building.

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▸ Contents — 2025 California Residential Code (Title 24, Part 2.5)
2025 California Residential Code (Title 24, Part 2.5)
  1. ▸ Chapter 1 — ADMINISTRATION
    Overview
    1. Section 1.1 — GENERAL
    2. Section 1.2 — RESERVED
    3. Section 1.3 — RESERVED
    4. Section 1.4 — RESERVED
    5. Section 1.5 — RESERVED
    6. Section 1.6 — RESERVED
    7. Section 1.7 — RESERVED
    8. Section 1.8 — DEPARTMENT OF HOUSING AND COMMUNITY DEVELOPMENT …
    9. Section 1.8.2 — AUTHORITY AND ABBREVIATIONS
    10. Section 1.8.3 — LOCAL ENFORCING AGENCY
    11. Section 1.8.4 — PERMITS, FEES, APPLICATIONS AND INSPECTIONS
    12. Section 1.8.5 — RIGHT OF ENTRY FOR ENFORCEMENT
    13. Section 1.8.6 — LOCAL MODIFICATION BY ORDINANCE OR REGULATION
    14. Section 1.8.7 — ALTERNATE MATERIALS, DESIGNS, TESTS AND METHOD…
    15. Section 1.8.8 — APPEALS BOARD
    16. Section 1.8.9 — UNSAFE BUILDINGS OR STRUCTURES
    17. Section 1.8.10 — OTHER BUILDING REGULATIONS
    18. Section 1.9 — RESERVED
    19. Section 1.10 — RESERVED
    20. Section 1.11 — OFFICE OF THE STATE FIRE MARSHAL
    21. Section 1.12 — RESERVED
    22. Section 1.13 — RESERVED
    23. Section 1.14 — RESERVED
    24. Section R101 — SCOPE AND GENERAL REQUIREMENTS
    25. Section R102 — APPLICABILITY
    26. Section R103 — CODE COMPLIANCE AGENCY
    27. Section R104 — DUTIES AND POWERS OF THE BUILDING OFFICIAL
    28. Section R105 — PERMITS
    29. Section R106 — CONSTRUCTION DOCUMENTS
    30. Section R107 — TEMPORARY STRUCTURES AND USES
    31. Section R108 — FEES
    32. Section R109 — INSPECTIONS
    33. Section R110 — CERTIFICATE OF OCCUPANCY
    34. Section R111 — SERVICE UTILITIES
    35. Section R112 — MEANS OF APPEALS
    36. Section R113 — VIOLATIONS
    37. Section R114 — STOP WORK ORDER
  2. Chapter 2 — DEFINITIONS
  3. Chapter 3 — BUILDING PLANNING
  4. Chapter 4 — FOUNDATIONS
  5. Chapter 5 — FLOORS
  6. Chapter 6 — WALL CONSTRUCTION
  7. Chapter 7 — WALL COVERING
  8. Chapter 8 — ROOF-CEILING CONSTRUCTION
  9. Chapter 9 — ROOF ASSEMBLIES
  10. Chapter 10 — CHIMNEYS AND FIREPLACES
  11. Chapter 44 — REFERENCED STANDARDS
  12. Appendix AA — BOARD OF APPEALS
  13. Appendix AB — PERMIT FEES
  14. Appendix AC — RESERVED
  15. Appendix BA — RESERVED
  16. Appendix BB — TINY HOUSES
  17. Appendix BC — RESERVED
  18. Appendix BD — RESERVED
  19. Appendix BE — RADON CONTROL METHODS
  20. Appendix BF — PATIO COVERS
  21. Appendix BG — SOUND TRANSMISSION
  22. Appendix BH — AUTOMATIC VEHICULAR GATES
  23. Appendix BI — LIGHT STRAW-CLAY CONSTRUCTION
  24. Appendix BJ — STRAWBALE CONSTRUCTION
  25. Appendix BK — COB CONSTRUCTION (MONOLITHIC ADOBE)
  26. Appendix BL — HEMP-LIME (HEMPCRETE) CONSTRUCTION
  27. Appendix BM — 3D-PRINTED BUILDING CONSTRUCTION
  28. Appendix BN — EXTENDED PLATE WALL CONSTRUCTION
  29. Appendix BO — EXISTING BUILDINGS AND STRUCTURES
  30. Appendix CA — RESERVED
  31. Appendix CB — RESERVED
  32. Appendix CC — RESERVED
  33. Appendix CD — RESERVED
  34. Appendix CE — RESERVED
  35. Appendix CF — RESERVED
  36. Appendix CG — NONSEWERED SANITATION SYSTEMS
  37. Appendix CH — PRIVATE SEWAGE DISPOSAL
  38. Appendix CI — SWIMMING POOL SAFETY ACT
  39. Appendix CJ — EMERGENCY HOUSING
  40. Appendix CK — AREAS PROTECTED BY THE FACILITIES OF THE CENTRAL…

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