Chapter 3 — OCCUPANCY CLASSIFICATION AND USE
312 Utility and Miscellaneous Group U — 2025 California Building Code
California Building Code (Title 24, Part 2) · 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 Building Code (Title 24, Part 2) § 312 · Effective January 1, 2026 · Official source: Building Standards Commission
312.1 General.¶
Buildings and structures of an accessory character and miscellaneous structures not classified in any specific occupancy shall be constructed, equipped and maintained to conform to the requirements of this code commensurate with the fire and life hazard incidental to their occupancy. Group U shall include, but not be limited to, the following:
Agricultural buildings
Aircraft hangars, accessory to a one- or two-family residence (see Section 412.4)
Barns
Carports Communication equipment structures with a gross floor area of less than 1,500 square feet (139 m [2] )
Fences more than 7 feet (2134 mm) in height
Grain silos, accessory to a residential occupancy
Livestock shelters
Private garages
Retaining walls
Sheds
Stables
Tanks
Towers
312.1.1 Greenhouses. Greenhouses not classified as another occupancy shall be classified as Use Group U.
312.2 Private garages and carports.¶
Private garages and carports shall comply with Section 406.3.
312.3 Residential aircraft hangars.¶
Aircraft hangars accessory to a one- or two-family residence shall comply with Section 412.4.
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