Longmont, CO — Basement Egress Specialists
Egress Window Installation for
Longmont Basements
To legally add a bedroom in your basement, Colorado code requires an egress window. Josh Brooks Construction cuts concrete foundations, installs window wells, handles drainage, pulls permits — and makes it look like it was always there.
✓ Concrete Cutting In-House
✓ Boulder County License CON-24-0152
What Colorado Code Requires for Basement Bedroom Egress
Under the 2021 International Residential Code (IRC) as adopted in Colorado, every basement bedroom must have at least one egress opening meeting these minimum specifications:
5.7 sq ft
Minimum net clear opening area
24 inches
Minimum clear opening height
20 inches
Minimum clear opening width
44 inches
Maximum sill height from floor
Our Egress Window Installation Process
1. Site Assessment & Permit Application
We assess your foundation wall type (poured concrete, block, or ICF), soil conditions, and exterior drainage before pulling the permit. This prevents surprises mid-project.
2. Interior Protection & Saw Cutting
We use diamond-blade concrete saws to cut the foundation opening with precision. Interior floor and wall protection is installed before any cutting begins — your finished space stays clean.
3. Exterior Excavation & Window Well
We excavate the exterior and install a properly sized window well (minimum 36″ wide) with a gravel drainage bed to prevent water infiltration — the most common egress failure point when done by inexperienced contractors.
4. Window Installation & Air Sealing
We install energy-code-compliant casement or slider windows, properly flashed and air-sealed to prevent moisture intrusion. All windows meet current Colorado U-factor requirements.
5. Inspection & Finish
Boulder County inspects the rough opening and final installation. We handle scheduling. Interior drywall is patched and finished. Exterior grade is restored.
Cost & Value: Egress Windows in Northern Colorado
A single egress window installation runs $3,500–$5,500 in Northern Colorado, including permit, excavation, window well, the window unit, and interior/exterior finish work. The return? An egress window converts an unclassifiable basement room into a legal bedroom — adding $20,000–$35,000 to your appraised home value in the current Longmont market. That’s a 5–8x ROI on a single day’s work.
Add a Legal Bedroom to Your Basement
We assess your foundation, pull the permit, cut the opening, install the window well, and leave you with a code-compliant egress window — in one or two days. Senior & Veteran discounts apply.
Call 720-828-7997
Free Estimate
2167 Frontier St, Longmont CO 80501 | Boulder County License CON-24-0152 | $1M/$2M GL Insured