Section R309 — AUTOMATIC SPRINKLER SYSTEMS — 2025 California Residential Code (Title 24, Part 2.5)

R309.1 Townhouse automatic sprinkler systems. ¶

R309.1 Townhouse automatic sprinkler systems. An automatic sprinkler system shall be installed in townhouses. Exception: An automatic sprinkler system shall not be required where additions or alterations are made to existing townhouses that do not have an automatic sprinkler system installed. R309.1.1 Design and installation. Automatic sprinkler systems for townhouses shall be designed and installed in accordance with Section R309 or NFPA 13D.

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback

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R309.2 One- and two-family dwellings automatic sprinkler systems. ¶

R309.2 One- and two-family dwellings automatic sprinkler systems. An automatic sprinkler system shall be installed in one- and two-family dwellings. Exceptions: 1. An automatic sprinkler system shall not be required for additions or alterations to existing buildings that are not already provided with a sprinkler system. 2. Accessory Dwelling Unit, provided that all of the following are met: 2.1. The unit meets the definition of an Accessory Dwelling Unit as defined in the Government Code Section 65852.2. 2.2. The existing primary residence does not have automatic fire sprinklers. 2.3. The…

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development

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R309.3 Dwelling unit automatic sprinkler systems. ¶

R309.3 Dwelling unit automatic sprinkler systems. R309.3.1 General. The design and installation of automatic sprinkler systems shall be in accordance with NFPA 13D or Section R309.3, which shall be considered to be equivalent to NFPA 13D. Partial automatic sprinkler systems shall be permitted to be installed only in buildings not required to be equipped with an automatic sprinkler system. Section R309.3 shall apply to standalone and multipurpose wet-pipe sprinkler systems that do not include the use of antifreeze. A multipurpose automatic sprinkler system shall provide domestic water to both…

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use

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