A Homeowner’s Guide to Egress Window Safety and Building Codes in Colorado
Finishing or remodeling a basement is one of the most cost-effective ways to add livable space to your home, but before turning that lower level into a bedroom, office, or rental suite, it’s critical to understand one key requirement: egress windows.
Whether you’re planning a full basement remodel or simply upgrading an existing space, Colorado building codes mandate egress windows in any room used as a bedroom or sleeping area. These windows aren’t just a technicality; they’re a life-saving safety feature that also increases home value and resale appeal.
What Is an Egress Window?
An egress window is a window designed to be large enough for safe exit during an emergency and entry for first responders. Unlike standard basement windows, egress windows must meet specific size, height, and accessibility standards to qualify as legal escape routes.
Minimum Egress Window Requirements in Colorado
While local municipalities like Denver, Colorado Springs, and Fort Collins may have slight variations, most follow the International Residential Code (IRC):
- Minimum opening width: 20 inches
- Minimum opening height: 24 inches
- Minimum net clear opening: 5.7 square feet (5.0 sq. ft. for ground-floor windows)
- Maximum sill height from floor: 44 inches
- Window wells deeper than 44 inches must include a permanent ladder or steps
Working with a licensed contractor like Lucas Remodeling ensures your installation is fully compliant with your local jurisdiction.
Why Egress Windows Are Essential for Basement Remodels
1. Life-Saving Safety
In the event of a fire or gas leak, basement stairways may become blocked. Egress windows provide fast escape routes for occupants, especially children, and give firefighters critical access points during rescue operations.
2. Required by Law for Legal Bedrooms or Rentals
If you plan to classify a basement room as a bedroom, apply for permits, or rent your basement as an ADU or Airbnb, Colorado law requires at least one operational egress window. Without it, the room cannot be legally marketed or appraised as a bedroom.
3. Boosts Home Value and Appraisal
Adding a code-compliant egress window instantly converts storage space into legal living space, often adding thousands in property value. Many appraisers estimate a return on investment of 50–100% depending on the size and quality of the remodel.
4. Natural Light & Ventilation
Egress windows dramatically brighten basements, making formerly dark spaces feel like true extensions of your home, not just lower-level storage areas.
How Much Does an Egress Window Cost in Colorado?
Most professionally installed egress windows range from $3,500 to $8,000, depending on:
- Existing foundation type
- Window size and style (sliding vs. casement)
- Excavation and window well requirements
- Interior finishing and trim
While it’s tempting to DIY, improperly installed egress windows can lead to water intrusion, structural damage, or failed inspections. Hiring a licensed contractor protects your investment and ensures full safety compliance.
Ready to Install an Egress Window? Contact Lucas Remodeling
Lucas Remodeling specializes in basement finishing and egress window installation across Colorado. From permitting to excavation to trim work, we handle the entire process start to finish. Our team ensures every egress window installation is fully compliant with local building codes, using high-efficiency, energy-rated windows for lasting performance.
We complete projects quickly with minimal disruption, providing professional workmanship backed by a warranty for your peace of mind. Contact us today by phone or request a quote online, and let us help make your basement both beautiful and safe!