Section R313.2 of the California Residential Code is amended to read:
R313.2 One and two-family dwellings automatic fire sprinkler systems. Approved automatic sprinkler systems in new buildings and structures and in existing modified buildings and structures, shall be provided in the locations described in this section. Automatic fire sprinklers shall be installed per the requirements set forth in Sections 903.2.1 through 903.2.18 of the California Building Code and as follows, whichever is the more restrictive:
1. An automatic sprinkler system shall be provided throughout all new buildings and structures.
Exception: New residential occupancies, buildings or structures that do not exceed 350 square feet of building area and contain no interior plumbing fixtures.
2. An automatic sprinkler system shall be provided throughout all existing buildings when modifications are made that create an increase in fire area to more than 3600 square feet or when the addition is equal or greater than 50% of the existing building square footage whichever is more restrictive.
3. An automatic sprinkler system shall be provided throughout all new or altered basements used for storage/ utility/occupancy or habitable space regardless of size and throughout existing basements that are expanded by more than 50%. If the addition or alteration is only the basement, then only the basement is required to be fire sprinkler protected.
4. An automatic sprinkler system shall be installed throughout when either the roof structure and/or exterior wall structure have been removed, altered and/or replaced by at least 50% of the existing structure.
5. An automatic sprinkler system shall be installed throughout when any change in use or occupancy creating a more hazardous fire/life safety condition, as determined by the Fire Chief.
(Ord. 5566 § 1 (part), 2022)