Chapter 12 — MULTIFAMILY BUILDINGS—ADDITIONS, ALTERATIONS

Section 180.1 — ADDITIONS

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

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Additions to existing multifamily buildings shall meet the applicable requirements of Sections 110.0 through 110.9; Sections 160.0, 160.1, and 160.2(c) and (d); Sections 160.3 through 160.7; and either Section 180.1(a) or 180.1(b). Exception 2 to Section 180.1: Additions of 300 square feet or less are not required to comply with the roofing product requirements of Section 170.2(a)1A. Exception 3 to Section 180.1: Existing inaccessible piping shall not require insulation as defined under Section 160.4(e). Exception 4 to Section 180.1: Space-conditioning system. When heating or cooling will be…