Basement Finishing in Morrison, CO

Basement finishing in Morrison follows one of the most detailed guides the town publishes: a dedicated Residential Basement Finish handout covering egress, ceiling height, alarms, insulation, and fuel-burning appliance clearances. Morrison is a small, incorporated town of about 396 residents, and the Building Department reviewing this work is administered under contract by Charles Abbott Associates rather than a large city staff. Our crew builds Morrison basements directly against the town’s own published numbers rather than assuming a generic set of figures.

Egress Windows Are the First Design Constraint

Morrison’s basement-finish guide sets specific egress figures for any basement bedroom or habitable space: a minimum net clear opening of 5.7 square feet, a minimum clear openable height of 24 inches, a minimum clear openable width of 20 inches, and a maximum finished sill height of 44 inches above the floor. The window must open from the inside without a key, tools, or special knowledge.

Where the egress window sits in a window well, the town requires a minimum well area of 9 square feet. If the well is deeper than 44 inches, a permanently affixed ladder or steps are required, and that ladder cannot interfere with the window’s required clear opening — it may encroach a maximum of 6 inches into the required clear width.

We size the egress window and well before framing the rest of the basement layout, since moving a window opening after framing is far more disruptive than planning around it from the start. On older Morrison foundations, this sometimes means cutting a new opening in an existing foundation wall rather than working with what is already there.

Ceiling Height and Habitable Space

If the finished ceiling height will be less than 7 feet, Morrison’s guide directs applicants to consult the Building Department before proceeding — the town does not treat that as an automatic pass or fail, but as a condition that needs a direct conversation with the reviewer. Many Morrison basements sit under older, lower-clearance foundations from the town’s historic building stock, so we check finished ceiling height against ductwork, beams, and soffits early, before drywall decisions are made.

Dropped-ceiling areas below 7 feet need to be identified on the submitted floor plan, along with the location of any structural modifications such as new posts, beams, or altered floor joists.

Life Safety: Smoke Alarms, CO Detectors, and Fire Blocking

Smoke alarms are required in every finished basement. If the basement includes a sleeping room, a smoke alarm is required on the ceiling or wall of that room and in the hallway or area immediately outside it. Alarms added to meet this requirement must be hard-wired with battery backup and interconnected with the home’s existing alarms — a rule that reaches new AND existing bedrooms, halls, and every level of the house, not just the new basement space.

CO detectors are required within 15 feet of the entrance to every bedroom on every floor, and may be battery-operated, plug-in, or hard-wired, including combination smoke/CO units.

Fire blocking is required in concealed spaces of wood-furred walls at the ceiling line, at 10-foot intervals along the wall length, and at intersections of concealed vertical and horizontal spaces, such as where a stud wall meets a soffit or dropped ceiling. The town’s guide accepts 1-1/2 inch lumber, 3/4 inch plywood or particleboard, 1/2 inch gypsum board, or securely fastened fiberglass insulation at least 16 inches in height as fire-blocking material.

Mechanical Equipment and Space Under Stairs

Furnaces and water heaters cannot sit inside a bedroom or bathroom unless they are installed in a dedicated enclosure that draws all combustion air directly from outdoors, behind a weather-stripped, self-closing solid door. A minimum of 30 inches of clear working space is required in front of furnaces and water heaters, and each appliance has to be serviceable without removing the other or disturbing walls, piping, valves, wiring, or junction boxes.

Where the space under a basement stair is enclosed and usable, the town’s guide requires the walls and ceiling to be protected with 1/2-inch gypsum board. We plan mechanical room layout and under-stair framing together, since both are inspected as part of the same rough-in walk-through.

Insulation, Bathrooms, and Radon

The town’s guide calls out an R-13 insulation value for finished basement walls. Where a basement bathroom is part of the scope, the same clearance figures apply as elsewhere in town: 21 inches in front of a toilet, 15 inches from the toilet centerline to a sidewall or obstruction, a minimum 900-square-inch shower, and an exterior-vented fan wherever a window cannot be opened.

A Morrison-specific radon rough-in requirement for finished basements was not found on an official town page in our research. Colorado is recognized statewide as a high radon-potential area, and we discuss radon testing and passive rough-in options with homeowners as a project add-on, but we do not represent it as a town-mandated line item unless the Building Department confirms one for a given project.

What the Permit Submittal Requires

Morrison’s basement-finish guide asks for two complete sets of a dimensioned floor plan showing the full basement layout, labeled room uses, and a clear distinction between existing and new work and between finished and unfinished areas. The plan needs to show electrical outlets, smoke detectors, lighting, fans, plumbing modifications, cleanouts, the furnace and water heater location with fuel type noted, window sizes and types with egress windows identified, and any structural modifications including areas where a dropped ceiling falls below 7 feet.

We build that plan set from the finished design before submittal, rather than filing a rough sketch and revising it during review, since a small building department reviewing a smaller volume of permits benefits from a complete package the first time.

How We Sequence a Morrison Basement Finish

We start with the egress window and well sizing, since that decision constrains bedroom placement and sometimes requires cutting a new foundation opening. We then lay out the mechanical room, under-stair space, and any bathroom against the town’s published clearances, and we assemble the two-set plan submittal with all the labeling the guide requires before filing with the Building Department.

Once permitted, our crew frames first, addressing any structural modifications to posts, beams, or joists, then completes rough plumbing, rough electrical, smoke and CO alarm wiring, and fire blocking before the rough inspection. Insulation at R-13 goes in after rough approval, followed by drywall, the egress window and well if not already complete, bathroom finishes, and final trim. We request inspections ahead of the town’s day-before cutoff and track the 180-day permit window so the basement moves from framing to final sign-off without a lapse.

Common Questions

What size does an egress window need to be for a Morrison basement bedroom?
Morrison’s guide requires a minimum net clear opening of 5.7 square feet, a minimum clear openable height of 24 inches, a minimum clear openable width of 20 inches, and a maximum finished sill height of 44 inches above the floor.

Does a Morrison basement need smoke and CO alarms?
Yes. Smoke alarms are required in every finished basement, with an additional alarm in any sleeping room and the hallway outside it. CO detectors are required within 15 feet of every bedroom entrance on every floor.

What ceiling height does Morrison require for a finished basement?
If the finished ceiling will be less than 7 feet, the town’s guide directs applicants to consult the Building Department before proceeding rather than setting an automatic pass-fail rule.

Does Morrison require radon testing or a radon rough-in for a basement finish?
A Morrison-specific radon requirement was not found on an official town page. Colorado is a recognized high radon-potential state, and we discuss testing and rough-in options with homeowners, but we confirm any town-mandated requirement with the Building Department rather than assuming one.

Talk to Us About Your Project

Tell us about your basement layout, especially where a bedroom, bathroom, or mechanical room is planned, and whether an egress window already exists. We handle the Morrison permit process and coordinate the plan set, framing, rough trades, inspections, and closeout for the finish.