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Earlier editions: 20222019

Chapter 8 — ALTERATIONS—LEVEL 2

809 Energy Conservation — 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) § 809 · Effective January 1, 2026 · Official source: Building Standards Commission

809.1 Minimum requirements.

Level 2 alterations to existing buildings or structures shall comply with applicable provisions of the California Energy Code (Part 6, Title 24, C.C.R).

8-10 2025 CALIFORNIA EXISTING BUILDING CODE

CALIFORNIA EXISTING BUILDING CODE – MATRIX ADOPTION TABLE

CHAPTER 9 – ALTERATIONS—LEVEL 3

(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

Adopting Agency BSC BSC-
CG
SFM HCD DSA OSHPD BSCC DPH AGR DWR CEC CA SL SLC
Adopting Agency BSC BSC-
CG
SFM 1 2 1/AC AC SS SS/CC 1 1R 2 3 4 5 6 6 6 6 6 6 6 6 6
Adopt Entire Chapter X X
Adopt Entire Chapter as
amended (amended
sections listed below)
X
Adopt only those sections
that are listed below
Chapter / Section
901.2 Exception † †
902.1_Reserved_ X
902.2 – 902.2.1 X
902.2 – 902.3 † †
903.4 † †
904.1 X
904.2 X
904.2.1 X
908 † †

The state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.

9-2 2025 CALIFORNIA EXISTING BUILDING CODE

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