Smoke alarms: bedrooms, halls, and the basement story
IRC R314 as adopted in the 2021 Utah State Residential Code requires a smoke alarm in each sleeping room, outside each separate sleeping area in the immediate vicinity of the bedrooms, and on each additional story of the dwelling, including basements. An unfinished storage corner that you later call a bedroom is still a sleeping room once it is used that way. Interconnection and power rules apply to new work. Devices generally take primary power from the building wiring with battery backup, and when more than one alarm is required they sound together. That wiring is electrical work. Wasatch Finish locates the devices in the finish plan; a licensed electrician installs them.
Carbon monoxide: Utah's extra 'each level' language
IRC R315 requires carbon monoxide alarms in dwellings with fuel-fired appliances or an attached garage. Placement is outside each separate sleeping area. Utah's adopted R315.3 also requires alarms on each level of the dwelling unit, not only at the bedroom hall. A finished basement with a bedroom therefore needs the bedroom smoke alarm, the hall smoke alarm, the basement-story smoke alarm if that is a separate story requirement, and CO on that level. Combination devices are common. The plan should show them before drywall so the electrician can rough the boxes.
How this meets the rest of a legal basement bedroom
Alarms do not replace egress or ceiling height. A basement bedroom still needs the 5.7-square-foot net clear opening and a finished ceiling that meets R305. Cities on our list, including American Fork's basement-finish checklist, also require existing-house smoke and CO devices to be brought up when you pull a basement-finish permit. If the lower level cannot meet those items, it can still be storage or a mechanical room. Calling it a bedroom on a listing without the opening, the height, and the alarms is how buyers and inspectors unwind a finish.
Bottom line
Treat a finished basement as another story: smoke in rooms and halls, smoke on the story, CO on the level. Wasatch Finish plans the locations; a licensed electrician installs them. Egress and 7-foot ceilings are separate rules that still apply to a bedroom.
Questions
Do I need smoke alarms in a finished basement in Utah?
Yes. IRC R314 as adopted in Utah requires smoke alarms in each sleeping room, outside each sleeping area, and on each story, including basements. A licensed electrician installs the devices; we locate them in the finish plan.
Where do carbon monoxide alarms go in a Utah basement finish?
Utah's adopted IRC R315.3 requires CO alarms on each level of the dwelling and outside each sleeping area, in homes with fuel-fired appliances or an attached garage. A basement bedroom level needs that coverage.
Can Wasatch Finish wire the alarms?
No. Alarm wiring is electrical work and is referred to a licensed electrician. We coordinate the locations so boxes land in the right rooms before drywall.
Does a basement without a bedroom still need alarms?
Yes for smoke on that story under R314, and yes for CO on that level under Utah's R315.3 language when the dwelling requires CO alarms. The bedroom devices add to that, they do not replace it.
