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Earlier editions: 20222019

Chapter 4A — REPAIRS

407A Mechanical — 2025 California Existing Building Code

California Existing Building Code (Title 24, Part 10) · 2025 edition · updated 2026-09-25 · 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 Existing Building Code (Title 24, Part 10) § 407A · Effective January 1, 2026 · Official source: Building Standards Commission

407 A .1 General. Existing mechanical systems undergoing repair shall not make the building less complying than it was before the damaged occurred.

4A-4 2025 CALIFORNIA EXISTING BUILDING CODE

REPAIRS

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▸Contents — California Existing Building Code (Title 24, Part 10)
California Existing Building Code (Title 24, Part 10)

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