Section R313.2 of Chapter 3 of the 2022 Edition of the California Residential Code, is hereby amended to read as follows:
R313.2 One- and two-family dwellings automatic fire sprinkler systems. An automatic residential fire sprinkler system shall be installed in one- and two-family dwellings.
Exceptions:
1. An automatic residential fire sprinkler system shall be installed when alterations to an existing building within any two-year period removes floor area or roof area assemblies of more than 50 percent of the existing building.
2. An automatic residential fire sprinkler system shall be installed when alterations to an existing building within any two-year period removes floor area or roof area assemblies of more than 33 percent of the existing building for existing buildings within Wildland-Urban Interface Fire Areas.
3. An automatic residential fire sprinkler system shall not be required for additions to existing buildings that are not already provided with an automatic residential sprinkler system and that do not include alterations within any two year period involving the removal of floor area or roof area assemblies of more than 50% of the total existing floor area of the building.
4. Accessory Dwelling Unit, provided that all of the following are met:
4.1. The unit meets the definition of an Accessory Dwelling Unit as defined in the Government Code Section 65852.2.
4.2. The existing primary residence does not have automatic fire sprinklers.
4.3. The accessory detached dwelling does not exceed 1,200 square feet in size.
4.4. The unit is on the same lot as the primary residence.
(Ord. 3316 § 2 (part), 2022).