Tacoma, WA Fire Regulations: Smoke Detectors (2026)
Key Facts
- Governing code
- TMC § 2.01.060.W.1
- Applies to
- Existing Group R and I-1
- Power source
- House wiring + battery backup
- Violation points
- 50 points, Table A item 77
Summary
Tacoma requires smoke alarms in every bedroom, hallway outside sleeping areas, and each story of existing Group R and I-1 buildings, battery-backed against power loss.
General. Group I-1 and Group R occupancies, as defined in the Building Code, shall be provided with single-and multiple-station smoke alarms in accordance with the Fire Code. Note: This requirement applies to all existing I-1 and Group R occupancies including those not undergoing additions, alterations, or repairs.
b. Power source. Smoke alarms shall receive their primary power from the building wiring when such wiring is served from a commercial source, and shall be equipped with a battery backup. The detector shall emit a signal when the batteries are low. Wiring shall be permanent and without a disconnecting switch other than those required for over-current protection. Smoke alarms may be solely battery operated when installed in existing buildings where no construction is taking place; in buildings that are not served from a commercial power source; and in existing areas of buildings undergoing alterations or repairs that do not result in the removal of interior wall or ceiling finishes exposing the structure, unless there is an attic crawl space or basement available which could provide access for interconnection without the removal of interior finishes.
c. Location within dwelling and sleeping units. A smoke alarm shall be installed within each sleeping room and directly outside of each sleeping area in the immediate vicinity of bed rooms. A minimum of one smoke alarm shall be installed on each story, including those without sleeping rooms.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4946110; v22 updated 2026-07-28).
Full Breakdown
TMC § 2.01.060.W.1 requires all existing Group I-1 and Group R occupancies, covering essentially every dwelling, to carry single- or multiple-station smoke alarms per the Fire Code, whether or not the building is undergoing repairs. Alarms must sit inside each sleeping room and directly outside sleeping areas, with at least one per story, and must draw primary power from house wiring with a battery backup that signals when low. Hotels need additional alarms along the egress path from sleeping areas to the unit door. The Building Official enforces this through the Chapter 2.01 inspection and point-table system.
Violations & Fines
Missing or inoperative smoke detectors score 50 points under Table A, item 77: enough alone to push a building toward 'substandard' status and a Building Official repair order.
Frequently Asked Questions
Does Tacoma require smoke alarms in existing homes, not just new construction?
Where must smoke alarms go in a Tacoma home?
Sources & Official References
Other rules in Tacoma
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