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Earlier editions: 20222019

Appendix G — FLOOD-RESISTANT CONSTRUCTION

G103 Applicability — 2025 California Building Code

California Building Code (Title 24, Part 2) · 2025 edition · updated 2026-10-19 · California

CBSC: official editions, supplements and errata

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

Cite as: 2025 California Building Code (Title 24, Part 2) § G103 · Effective January 1, 2026 · Official source: Building Standards Commission

G103.1 General.

This appendix, in conjunction with this code, provides minimum requirements for development located in flood hazard areas, including:

  1. The subdivision of land.

  2. Site improvements and installation of utilities.

  3. Placement and replacement of manufactured homes.

  4. Placement of recreational vehicles.

  5. New construction and repair, reconstruction, rehabilitation or additions to new construction.

  6. Substantial improvement of existing buildings and structures, including restoration after damage.

  7. Installation of tanks.

  8. Temporary structures.

  9. Temporary or permanent storage, utility and miscellaneous Group U buildings and structures.

  10. Certain building work exempt from permit under Section 105.2 and other buildings and development activities.

Exceptions & meaning →

G103.2 Establishment of flood hazard areas.

Flood hazard areas are established in Section 1612.3 of this code, adopted by the applicable governing authority on [ INSERT DATE ] .

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▸Contents — California Building Code (Title 24, Part 2)
California Building Code (Title 24, Part 2)

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