Basement bedrooms and egress in Fort Collins
What a lower-level room needs before Fort Collins will treat it as a bedroom.
A legal basement bedroom in Fort Collins needs enough floor area and ceiling height, an escape window or door, the right alarms and a permit with inspections. This page is for homeowners adding a bedroom for family or guests, landlords, and sellers who want the bedroom count to hold up. The result is a room someone can sleep in safely and get out of quickly.
The Fort Collins checklist
- Room size. At least 70 square feet and at least 7 feet in each direction.
- Ceiling height. At least 6 feet 8 inches, or 6 feet 4 inches under ducts and existing beams.
- Escape opening. Every bedroom needs an emergency escape and rescue opening, marked new or existing on the plans. A new below-grade egress window needs 5.7 square feet of net clear opening.
- Window well. New wells drain to the foundation drain if there is one, need fall protection next to doors and walkways, and need an unobstructed path to the sidewalk or street.
- Engineer's letter. New or larger basement windows count as structural work and need an engineer's evaluation letter.
- Alarms. Smoke alarms inside and outside sleeping areas and on each level; carbon monoxide alarms outside sleeping areas within 15 feet.
- Furnace room. Mechanical room access can't open into a bedroom unless the city's listed exceptions apply.
Signs a basement room isn't a bedroom yet
- Only a small, high window, or none
- The furnace room door opens into it
- The ceiling is low under a beam or duct run
- No smoke alarm in the room
- No permit on record for the finish
Why it matters in Fort Collins
Plenty of Fort Collins basements have small windows, especially in older homes, and the city's rental housing market around Colorado State University means basement rooms often get used as bedrooms. Cutting a new window into a foundation in expansive clay also means drainage at the bottom of the well matters, so water doesn't collect against the wall.
What affects the cost?
- New window opening versus an existing one that already qualifies
- Engineering, wall type and well depth
- Moving the furnace room door or upgrading appliances
- Alarm wiring and closet, door and trim work
Towns we cover
Common questions
How big does a basement bedroom have to be in Fort Collins?
The city's basement finish guide sets a minimum of 70 square feet, with no dimension under 7 feet.
Does a replacement basement window have to meet full egress size?
The city's guide lists a smaller minimum for replacement windows: at least 22 inches high, 20 inches wide and 4 square feet of net clear opening. New windows need 5.7 square feet.
Who has to call 811 before a window well is dug?
Colorado 811 says all property owners must request a locate before digging. A contractor doing the work usually files it.
Related services
More background: Fort Collins basement finishing guide.
Planning a basement on Front Range clay?
Call and a local basement finishing company will look at the slab, the layout and the permit with you.