Attic Conversion
An attic conversion is often the most cost-effective way to add living space because the roof and footprint already exist. PrimeStone Construction Group is a licensed, structural engineer–owned contractor that turns Denver attics into functional, code-compliant living space, handling ceiling height, structural capacity, egress, insulation, and permits from start to finish.
As a structural engineer–owned design-build company, we ensure every attic conversion is safe, code compliant, and optimized for structural integrity — from framing modifications to insulation, utilities, and finished interiors. We serve homeowners throughout the Denver Metro Area and Colorado Front Range, including Denver, Aurora, Highlands Ranch, Centennial, Lakewood, Boulder, and nearby communities.
What is an attic conversion? An attic conversion transforms unused attic space into finished, livable area a bedroom, home office, or bonus room. Because it uses your home’s existing roof and footprint, it can be more affordable than an addition, but success depends on ceiling height, floor structure, safe access, and code-compliant egress.
Why Choose PrimeStone for Your Attic Conversion
Our Attic Conversion Services
PrimeStone offers comprehensive attic conversion services — designed and built to enhance your home and meet your needs:
Because PrimeStone is structural engineer–owned, all attic conversions are designed with engineered details for structural support, proper load paths, and compliance with Colorado building codes.
Is Your Attic a Candidate for Conversion?
Before design begins, a few structural and code factors determine whether and how your attic can be converted:
- Ceiling height: Most of the finished attic should have at least 7 feet of headroom. If yours doesn’t, dormers or a roof raise may be needed.
- Floor structure: Attic joists are often sized for storage, not living loads they usually need reinforcement.
- Access: A code-compliant permanent staircase is required pull-down ladders don’t qualify for living space.
- Egress: An attic bedroom needs a code-compliant egress window or dormer for emergency escape.
- Insulation & HVAC: The space needs proper insulation and heating/cooling to be comfortable year-round in Colorado.
- Roof type: Homes with rafters convert more easily than those with engineered trusses, which are harder (and costlier) to modify.
How Much Does an Attic Conversion Cost in Denver, CO?
Attic conversions in Denver typically cost between $50,000 and $100,000, with simpler finishes running as low as $20,000–$30,000 and complex projects reaching higher. Most projects fall between $50 and $150 per square foot depending on scope. Adding a bathroom, raising the roof, or installing dormers are the biggest cost drivers.
Scope | Estimated Cost (2026) |
Basic finish (bonus room / office) | $20,000 – $40,000 |
Full conversion (bedroom, egress, HVAC) | $50,000 – $100,000 |
Dormer addition | $20,000 – $55,000 |
Raising the roof / framing | $30,000 – $70,000 |
Design and permit fees typically run $1,000–$5,000, and structural changes to roof trusses or the attic floor require engineering review. Every PrimeStone estimate is itemized before construction begins.
How Long Does an Attic Conversion Take?
Most attic conversions in Denver take 4 to 8 weeks, while more complex projects those involving a roof raise, dormers, or a bathroom can stretch to 10 to 12 weeks. Coordinating inspections and permitting can extend the timeline. We provide a realistic schedule during planning.
Popular Attic Conversion Ideas
- Primary or guest bedroom (with egress and closet)
- Home office or studio
- Kids’ playroom or bonus room
- Media room or reading nook
- Home gym
- Attic ADU / internal suite (where zoning allows)
Permits & Code for Denver Attic Conversions
Attic conversions require permits from Denver Community Planning & Development, and structural changes to trusses or the attic floor require engineering review. For a legal bedroom, the space must meet minimum ceiling height (about 7 feet over most of the floor), have a code-compliant egress window, a permanent staircase, and adequate floor load capacity. Historic homes in areas like Capitol Hill or Wash Park may present added structural and code challenges. PrimeStone manages the full permit process and engineers all structural work in-house.
Areas We Serve
PrimeStone converts attics throughout the Denver Metro and Front Range, including:
Denver · Aurora · Lakewood · Westminster · Thornton · Broomfield · Boulder · Golden · Breckenridge · Aspen · Vail
Our Attic Conversion Process
We start with an on-site evaluation to assess roof framing, load capacity, utilities, head height, and access.
Our team develops a custom layout and engineered plans that address structural needs, access, egress, insulation, and code compliance.
We prepare permit documents and submit them to the appropriate building department, coordinating inspections and approvals.
From structural modifications to utility install and finish carpentry, we manage all phases of construction with quality craftsmanship.
Once complete, we coordinate final inspections and deliver your new finished attic space — ready to enjoy.
PrimeStone brings engineering rigor and remodeling experience together to transform unused attic spaces into beautiful, functional areas you’ll love.
Ready to make the most of your attic space?
Contact PrimeStone today to schedule a consultation and receive a detailed estimate for your attic conversion.
Attic Conversion FAQ
What is an attic conversion?
Do I need a permit for an attic conversion?
Can all attics be converted?
How long does an attic conversion take?
How much does an attic conversion cost?
Can I add a bathroom in my attic conversion?
Do attic conversions add value to my home?
What makes PrimeStone different from other remodelers?
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