Idaho's adopted IBC and IRC require fire sprinklers in new multi-family buildings and townhouses, but Idaho Code §39-4116 prohibits cities from mandating sprinklers in single-family detached homes, leaving Boise without a citywide one- and two-family sprinkler mandate despite Foothills wildfire risk.
Idaho Code §39-4116 specifically preempts local jurisdictions from requiring sprinklers in detached one- and two-family homes built under the IRC. New apartments, condos, hotels, and townhouse rows still require NFPA 13 or 13R sprinkler systems through the adopted IBC. Boise Fire enforces sprinkler standards at plan review and inspections through Building Services. Voluntary residential sprinklers are encouraged for Foothills WUI zones and offered insurance discounts. Existing high-rise residential buildings followed retrofit requirements years ago. Properly maintained sprinklers must remain unobstructed; tampering or removal during remodels triggers immediate correction orders from Boise Fire.
Failing required sprinkler installation in covered occupancies blocks certificates of occupancy; tampering with installed systems is a fire-code violation with criminal exposure.
See how Boise's fire sprinkler requirements rules stack up against other locations.
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