Section 180.0 — GENERAL
2025 California Energy Code (Title 24, Part 6) · 2025 edition · updated 2026-07-25 · California
Additions, alterations and repairs to existing attached dwelling units and common use areas in multifamily buildings, existing outdoor lighting for these occupancies, and internally and externally illuminated signs shall meet the requirements specified in Sections 100.0 through 110.10, 160.1, and 160.3 through 170.2 that are applicable to the building project, and either the performance compliance approach (energy budgets) in Section 180.1(b) (for additions) or 180.2(c) (for alterations), or the prescriptive compliance approach in Section 180.1(a) (for additions) or 180.2(b) (for alterations), for the climate zone in which the building is located. Climate zones are shown in Figure 100.1-A.
Covered process requirements for additions, alterations and repairs to existing multifamily buildings are specified in Section 141.1.
Nonresidential occupancies in mixed occupancy buildings shall comply with nonresidential requirements in Sections 120.0 through 141.1.
NOTE: For alterations that change the occupancy classification of the building, the requirements specified in Section 180.2 apply to the occupancy after the alterations.
NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code . Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8 and 25943, Public Resources Code .
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Ask AI about this code▸ Contents — 2025 California Energy Code (Title 24, Part 6)
- Chapter 1 — ALL OCCUPANCIES—GENERAL PROVISIONS
- Chapter 2 — ALL OCCUPANCIES—MANDATORY REQUIREMENTS FOR THE MAN…
- Chapter 3 — NONRESIDENTIAL, HOTEL/MOTEL OCCUPANCIES, AND COVER…
- Chapter 4 — NONRESIDENTIAL AND HOTEL/MOTEL OCCUPANCIES—MANDATO…
- Chapter 5 — NONRESIDENTIAL AND HOTEL/MOTEL OCCUPANCIES—PERFORM…
- Chapter 6 — NONRESIDENTIAL AND HOTEL/MOTEL OCCUPANCIES—
- Chapter 7 — SINGLE-FAMILY RESIDENTIAL BUILDINGS—
- Chapter 8 — SINGLE-FAMILY RESIDENTIAL BUILDINGS—PERFORMANCE AN…
- Chapter 9 — SINGLE-FAMILY RESIDENTIAL BUILDINGS—ADDITIONS AND …
- Chapter 10 — MULTIFAMILY BUILDINGS—MANDATORY REQUIREMENTS
- Chapter 11 — MULTIFAMILY BUILDINGS—PERFORMANCE AND PRESCRIPTIV…
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▸ Chapter 12 — MULTIFAMILY BUILDINGS—ADDITIONS, ALTERATIONS AND …