Bucks County, PA Fire Regulations: Smoke Detectors (2026)

Bucks County does not have a county-level smoke detector ordinance. The Pennsylvania Uniform Construction Code (UCC), enacted as Act 45 of 1999 and codified at 35 P.S. §§ 7210.101 et seq., applies countywide and adopts the International Residential Code (IRC) for one- and two-family dwellings. IRC R314 requires smoke alarms in each sleeping room, outside each separate sleeping area in the immediate vicinity of bedrooms, and on each additional story of the dwelling, including basements and habitable attics. Alarms must be listed to UL 217 and, in new construction or substantial alteration, must be hardwired with battery backup and interconnected so activation of one alarm sounds all alarms. Pennsylvania has amended R314.2.2 so that retroactive smoke alarm requirements in existing dwellings only apply when work is performed that requires a building permit; PA also exempts one- and two-family dwellings undergoing alterations from the interconnection requirement (battery-only alarms are acceptable for retrofits). Carbon monoxide alarms are required separately under Pennsylvania's Carbon Monoxide Alarm Standards Act (Act 121 of 2013, 35 P.S. §§ 7221-7227), which became effective June 2015 and mandates CO alarms in multifamily rental dwellings with a fossil-fuel-burning heater or appliance, fireplace, or attached garage; alarms must be installed in the vicinity of bedrooms and the fuel-burning source. Each Bucks County municipality enforces the UCC through its own code official; some boroughs (Doylestown, Bristol, Quakertown, New Hope) operate their own building departments while many townships contract with third-party agencies. The Bucks County Department of Emergency Services coordinates fire prevention messaging but does not enforce the UCC.