Philadelphia, PA Fire Regulations: Smoke Detectors (2026)
Key Facts
- Required in
- Every bedroom and sleeping-area exit
- Coverage
- Every story incl. basements/cellars
- Standard power
- House wiring plus battery backup
- Pre-1988 exception
- Sealed 10-year battery alarms OK
- Max fine
- $1,000 per violation (Class II)
Summary
Every Philadelphia dwelling must have smoke alarms in each bedroom, outside sleeping areas, and on every story, powered by house wiring with battery backup or sealed 10-year batteries in pre-1988 homes.
Single- or multiple-station smoke alarms shall be installed and maintained in Groups R-2, R-3, R-4 and in dwellings not regulated in Group R occupancies, regardless of occupant load at all of the following locations: 1. On the ceiling or wall outside of each separate sleeping area in the immediate vicinity of bedrooms. 2. In each room used for sleeping purposes. 3. In each story within a dwelling unit, including basements and cellars but not including crawl spaces and uninhabitable attics.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 Code: Electronic version of The Philadelphia Code and Home Rule Charter is current through August 19, 2026).
Full Breakdown
The Philadelphia Property Maintenance Code requires single- or multiple-station smoke alarms in every dwelling unit covered by Groups R-2, R-3, R-4, and non-Group-R dwellings, regardless of occupant load. Alarms must sit outside each sleeping area, inside every bedroom, and on every story including basements and cellars (crawl spaces and uninhabitable attics excepted). Where more than one alarm is required, they must be interconnected so one alarm trips them all, audible in every bedroom over background noise. Power comes from building wiring with battery backup, except pre-1988 one- and two-family homes may use sealed 10-year battery units. The Department of Licenses and Inspections enforces this under Title 4 of the Code.
Violations & Fines
Class II offense under § A-601.2 of the Building Code; up to $1,000 per violation, each day a separate offense under § 1-109(2).
Frequently Asked Questions
Do I need a smoke alarm in every bedroom in Philadelphia?
Can a Philadelphia rowhome use battery-only smoke alarms?
Sources & Official References
Other rules in Philadelphia
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