Turn Your Westminster Basement Into Living Space
Westminster’s mix of established and newer homes means plenty of unfinished basements ready to become living space. PrimeStone Construction Group is a structural engineer–owned basement finishing contractor serving Westminster — handling moisture, egress, radon, and permits across the city’s two-county footprint.
How much does basement finishing cost in Westminster? Basement finishing in Westminster typically $30,000–$115,000+ (average around $65,000, or $65–$125/sq ft), and most projects take 6 to 10 weeks. Egress windows, bathrooms, and moisture work are the main drivers.
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Why Westminster Homeowners Choose PrimeStone for Basement Finishing
- Structural engineer–owned: Egress cutting and structural work engineered in-house.
- Two-county know-how: Westminster spans Jefferson and Adams counties — we confirm the right requirements for your address.
- Full permit management: We handle permits with Westminster Development Services.
- Moisture & radon first: Assessed before finishing, given Colorado’s high radon.
Basement Finishing for Westminster Homes
Westminster’s housing ranges from older established neighborhoods to newer developments near the tech corridor, so basement conditions vary. Every project starts with a moisture and radon assessment. Because Westminster straddles Jefferson and Adams counties, the exact permitting path can depend on where your home sits — something we sort out for you before work begins. For a legal bedroom, we install a code-compliant egress window.
- Legal bedrooms: Egress window, closet, heating/cooling, and finished walls.
- Two-county permitting: We confirm the correct requirements for your parcel.
- Radon mitigation: Recommended before closing up walls.
Basement Finishing Cost in Westminster
Finishing a basement in Westminster typically $30,000–$115,000+ (average around $65,000, or $65–$125/sq ft). A finished basement typically returns 70–75% of its cost at resale. Bathrooms, egress windows, and moisture work are the main add-ons.
Permits for Basement Finishing in Westminster
Basement finishing in Westminster requires building, electrical, plumbing, and mechanical permits from Westminster Development Services. Because Westminster spans Jefferson and Adams counties, requirements can vary by location — we confirm the correct path for your property and manage the full process.
Westminster’s two-county permit requirements change. PrimeStone confirms current requirements with Westminster Development Services for every basement project.
Full Basement Finishing Details
This page focuses on basement finishing specifically in Westminster. For our complete breakdown of process, costs, timelines, materials, and code requirements, see our main Basement Finishing page (linked here).
Frequently Asked Questions
How much does it cost to finish a basement in Westminster?
Basement finishing in Westminster typically $30,000–$115,000+ (average around $65,000, or $65–$125/sq ft). Bathrooms, egress windows, and any moisture work add to the total.
Do I need a permit to finish my basement in Westminster?
Yes. Basement finishing requires permits from Westminster Development Services. Because the city spans two counties, we confirm the correct requirements for your address and handle the process.
Does my Westminster basement bedroom need an egress window?
Yes. Any basement bedroom in Colorado requires a code-compliant egress window, plus a closet and proper heating/cooling. We install egress windows as part of the project.
How long does basement finishing take in Westminster?
Most basement finishing projects take 6 to 10 weeks, depending on scope and whether you add a bathroom or egress window.
Does it matter whether my Westminster home is in Jefferson or Adams County for basement finishing?
Yes. Both counties fall under Westminster Development Services for permitting, but plan review details and inspection scheduling can differ depending on which county your parcel sits in. We pull your parcel information before submitting plans so the egress, electrical, and mechanical permits are filed correctly the first time.
Should I test for radon before or after finishing my Westminster basement?
Before. We run a radon assessment as part of the initial moisture evaluation, since Colorado has some of the highest radon levels in the country. If mitigation is needed, it’s installed before walls are closed up, which avoids cutting into finished framing or drywall later.
Can you remodel a basement in Westminster that was already finished?
Yes. PrimeStone handles basement remodels in Westminster whether the space is unfinished or an older finish that needs to be reworked. Because we are a structural engineer–owned design-build firm, we can open up layouts, add egress for a legal bedroom, and coordinate the permits with the right jurisdiction for your home.
Basement Finishing Guides
Ready to Start Your Westminster Basement Finishing Project?
Turn your Westminster basement into legal, comfortable living space. PrimeStone’s structural engineer–owned team handles moisture, egress, radon, and permits.
Get a Free Consultation → 720-468-0686 · info@primestonecg.com