Attic-to-Bedroom Conversions
An attic-to-bedroom conversion turns the space under your roof into a legal sleeping room: code-height ceiling, egress window, permanent stair, heat, and interconnected smoke alarms. Grandview Contractors builds them across Utah County and Salt Lake County under a Utah DOPL B100 general contractor license, and settles the bedroom-specific code questions before anyone cuts a rafter.
When a bedroom is the right use of the attic
A bedroom is the most demanding thing you can put in an attic, and the one that adds the most value when it’s done legally. Offices and bonus rooms don’t need an emergency escape opening; a sleeping room does. If a kid is moving upstairs or you want the listing to read “four bedrooms” instead of “three plus loft,” this is the page. If nobody will sleep there, an attic home-office conversion gets you the space with fewer code triggers and a lower budget.
Two things decide if the bedroom pencils out. First, can a code-compliant egress window go in a gable wall or roof slope without a dormer? If not, a dormer addition joins the scope and the budget changes shape. Second, is there a permanent stair, or are we replacing a pull-down ladder? An attic staircase addition is a project in its own right, priced as one. If the bedroom comes with its own bath, read the attic-to-bathroom conversion page too; the plumbing drops drive the layout.
What a legal attic bedroom has to include
Current Utah-adopted code treats a bedroom as a habitable sleeping room, which carries a specific list. We design to every item and confirm city-specific interpretations with your building department during scoping.
- Headroom over the sleeping area. Sloped ceilings are allowed, but the room needs full-height ceiling over a defined share of its floor area; the low slopes go to the bed, dressers, and knee-wall storage.
- Egress window. An emergency escape and rescue opening to the outside, with net clear opening and sill height set by code. In an attic that means a gable-wall casement or a roof-slope egress skylight, sized from the code numbers, not the catalog.
- Floor built for sleeping-room loads. Ceiling joists are sized for light storage; a bedroom floor carries a higher live load, so joists are sistered, replaced, or supplemented before subfloor goes down.
- Heat and a path for cooling. A bedroom must be heated to a code minimum. Wasatch Front attics also bake under high-elevation summer sun, so we plan cooling at the same time rather than discovering the problem in July.
- Interconnected smoke and CO alarms. Alarms inside the room, outside it, and tied to the rest of the house. If the house has no interconnect yet, that becomes an electrical line item.
- A permanent, code-compliant stair. Ladders and ship’s stairs don’t qualify for a bedroom.
A closet, for the record, is not a code requirement. Buyers expect one, so we tuck it behind a knee wall where the slope is too low to stand anyway.
How we build an attic bedroom
- Measure the sleeping area first. We lay out the bed and walking path against ridge height and rafter slope to confirm the full-height zone is real, then locate the egress and stair landing before any design money is spent.
- Engineer the floor and roof together. Sistered or new floor joists, a structural ridge or collar ties where rafters need help, and a snow-load check for your lot. Design snow loads climb from the valley floor up the east benches, and a finished bedroom changes how the roof carries them.
- Open the egress. Headers and framing for a gable window or roof-slope egress skylight, flashed into the existing roofing and fastened for canyon-wind gusts.
- Insulate and ventilate the roof plane. A bedroom ceiling is the underside of the roof, so insulation sits between rafters with baffles for airflow, or the bays are foamed as an unvented assembly, sized to the levels the U.S. Department of Energy recommends for our climate zone; our attic insulation page covers the options.
- Run the trades in sequence. Grandview holds the contract and manages the licensed electricians and HVAC contractors the bedroom needs: circuits, alarm interconnect, and a duct extension or dedicated ductless head. We sequence and quality-check their work inside the project.
- Finish and close out. Drywall on the slopes, flooring with sound underlayment, trim, paint, final inspections, and a permit record that lets the room be called a bedroom when you sell.
What does an attic bedroom conversion cost in Utah?
As ballpark planning numbers, an attic bedroom with sound structure, an existing stair, and a gable egress window tends to run $45,000–$85,000 along the Wasatch Front. Add a new staircase or a dormer to make egress and headroom work, and $85,000–$140,000 is more realistic. Planning ranges, not quotes; a walkthrough gets you a number for your roof.
What moves it: the floor joist upgrade is the first line item and the least negotiable. The egress is second, and a casement in an existing gable costs far less than a dormer built to hold one. Alarm interconnect in an older house, a separate HVAC zone, and roof-plane insulation each add real but predictable cost. Permit timelines matter too: Provo, Orem, and Salt Lake City run mature reviews, while fast-growth cities like Lehi and Saratoga Springs can queue longer on structural work. You can confirm our license through the Utah DOPL lookup.
Questions we actually get
Can a skylight serve as the egress window for an attic bedroom?
Yes, if it’s a true egress skylight: one that opens wide enough to meet the net clear opening and sits low enough on the slope to meet the sill-height limit. Standard venting skylights don’t qualify. We confirm model and placement with your city’s plan reviewer before ordering.
Does the attic bedroom need its own heating and cooling?
Heat by code, cooling by common sense. Extending the existing system works when the furnace and ducts have capacity for a room two floors up; often they don’t. A ductless mini-split head is the usual answer, installed by the licensed HVAC contractor we manage within the project.
Can my existing ceiling joists carry a bedroom floor?
Usually not as-is. Most ceiling joists were sized for drywall and light storage, not a bed, dressers, and people. Sistering new lumber to each joist or setting new joists between them is standard, engineered rather than guessed. It’s the first cost on nearly every attic bedroom.
Will the rooms below hear everything?
Not if the floor is built for it. A bedroom floor over living space gets resilient underlayment under the finish flooring and insulation in the joist bays, cheap while the floor is open and expensive after. We include it by default.
Attic bedrooms are one branch of our attic conversion work, which sits inside renovation and build-outs. The egress piece on its own is covered under egress window installation.
Tell us who’s moving upstairs
We reply within a couple of hours during business hours, a day at most. You’ll get a straight read on whether the attic can hold a legal bedroom, what it takes, and a planning budget before anyone commits.