Section AJ104
California Residential Code (Title 24, Part 2.5) · 2022 edition · updated 2026-09-12 · California
Italicized text is a California amendment to the model code, as printed in the official publication.
AJ104.1 General.¶
The building official shall have the authority to require an existing building to be investigated and evaluated by a registered design professional in the case of proposed reconstruction of any portion of a building. The evaluation shall determine the existence of any potential nonconformities to these provisions, and shall provide a basis for determining the impact of the proposed changes on the performance of the building. The evaluation shall use the following sources of information, as applicable:
- Available documentation of the existing building.
1.1. Field surveys. 1.2. Tests (nondestructive and destructive). 1.3. Laboratory analysis.
Exception: Detached one- or two-family dwellings that are not irregular buildings under Section R301.2.2.6 and are not undergoing an extensive reconstruction shall not be required to be evaluated.
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Ask AI about this code▸Contents — California Residential Code (Title 24, Part 2.5)
- Chapter 2 — DEFINITIONS AND ABBREVIATIONS
- Appendix AF — RADON CONTROL
- Appendix AI — PRIVATE SEWAGE
- Appendix AJ — EXISTING
- Appendix AK — SOUND
- Appendix AO — AUTOMATIC
- Appendix AR — LIGHT STRAW-CLAY
- Appendix AS — STRAWBALE
- Appendix AU — COB CONSTRUCTION
- Appendix AV — BOARD
- Appendix AW — 3D-PRINTED BUILDING
- Chapter 1 — SCOPE AND APPLICATION
- Chapter 3 — BUILDING PLANNING
- Chapter 4 — FOUNDATIONS
- Chapter 5 — FLOORS
- Chapter 6 — WALL CONSTRUCTION
- Chapter 7 — WALL COVERING
- Chapter 8 — ROOF-CEILING CONSTRUCTION
- Chapter 9 — ROOF ASSEMBLIES
- Chapter 10 — CHIMNEYS AND FIREPLACES
- Chapter 44 — REFERENCED STANDARDS
▸Appendix AH — PATIO COVERS
- Appendix AL — PERMIT FEES
- Appendix AQ — TINY HOUSES
- Appendix AT — SOLAR-READY PROVISIONS—DETACHED ONE- AND
- Appendix AX — SWIMMING POOL SAFETY ACT
- Appendix AY — AREAS PROTECTED BY THE FACILITIES
- Appendix AZ — EMERGENCY HOUSING