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Earlier editions: 20222019

Chapter 1 — GENERAL CODE PROVISIONS

1.8.6 Local Modification by Ordinance or Regulation — 2025 California Mechanical Code

California Mechanical Code (Title 24, Part 4) · 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 Mechanical Code (Title 24, Part 4) § 1.8.6 · Effective January 1, 2026 · Official source: Building Standards Commission

1.8.6.1 General. Subject to other provisions of law, a city, county, or city and county may make changes to the provi- sions adopted by the Department of Housing and Community Development. If any city, county, or city and county does not amend, add, or repeal by local ordi- nances or regulations the provisions published in this code or other regulations promulgated by the Department of Housing and Community Development, those provi- sions shall be applicable and shall become effective 180 days after publication by the California Building Stan- dards Commission. Amendments, additions, and deletions to this code adopted by a city, county, or city and county pursuant to California Health and Safety Code Sections 17958.5, 17958.7 and 18941.5, together with all appli- cable portions of this code, shall also become effective 180 days after publication of the California Building Standards Code by the California Building Standards Commission.

1.8.6.2 Findings, Filings, and Rejections of Local Modifications. Prior to making any modifications or establishing more restrictive building standards, the governing body shall make express findings and filings,

as required by California Health and Safety Code Section 17958.7, showing that such modifications are reasonably necessary due to local climatic, geological, or topo- graphical conditions. No modification shall become effective or operative unless the following requirements

are met:

(1) The express findings shall be made available as a public record.

(2) A copy of the modification and express finding, each document marked to cross-reference the other, shall be filed with the California Building Standards Commission for a city, county, or city and county, and with the Department of Housing and Commu- nity Development for fire protection districts.

(3) The California Building Standards Commission has not rejected the modification or change.

Nothing in this section shall limit the authority of fire protection districts pursuant to California Health and Safety Code Section 13869.7(a).

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▸Contents — California Mechanical Code (Title 24, Part 4)
California Mechanical Code (Title 24, Part 4)

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