Chapter 12 — MULTIFAMILY BUILDINGS—ADDITIONS, ALTERATIONS

Section 180.2 — ALTERATIONS

2025 California Energy Code (Title 24, Part 6) · 2025 edition · ingested 2026-07-07 · California

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Alterations to components of existing multifamily buildings, including alterations made in conjunction with a change in building occupancy to a multifamily occupancy, shall meet Item (a), and either Item (b) or (c) below: Exception 1 to Section 180.2: When heating, cooling or service water heating for an alteration is provided by expanding existing systems, the existing systems and equipment need not comply with Sections 110.0 through 110.10; Sections 160.0 through 160.7; and Section 170.2(c) or 170.2(d). Exception 2 to Section 180.2: When existing heating, cooling or service water-heating…