Data You Can Trust
Egress Window Installation for Longmont Basements
38
billion-dollar hailstorms in Colorado 1980–2024
NOAA
$1.9B
damage from May 2024 Front Range hailstorm
NOAA
96%
ROI on a minor kitchen remodel at resale
2025 Cost vs. Value Report
86%
of basement finishing costs recovered at resale
NAR / NARI Report
“Egress windows are legally required for basement bedrooms — the 2026 IRC is clear on this. I’ve been installing them in Longmont since 2014. Proper well sizing, waterproofing, and finishing around the opening are what separate a code-compliant install from one that fails inspection.”
Josh Brooks
Licensed General Contractor CON-24-0152 | Northern Colorado Since 2014
Also see: egress windows in Denver
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 and Renovation Inc. 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
Longmont CO 80501 | Boulder County License CON-24-0152 | $1M/$2M GL Insured
Sources & Further Reading
● National Association of Home Builders — Remodeling Market Data
● Colorado DORA — Verify Contractor License
● OSHA Construction Safety Standards
BY THE NUMBERS
What a Finished Basement Actually Returns
“Since 2014, basement finishing has been one of the most consistent investments my clients make. In Colorado, where housing costs are high, finishing an unfinished basement is almost always the smartest way to add usable space. The key is doing it right — proper egress, moisture control, permits pulled — so it adds value and doesn’t create problems at resale.”
— Josh Brooks, Licensed General Contractor — License CON-24-0152 — Longmont, CO
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