Turn Your Aurora Basement Into Legal, Livable Space
Aurora’s large stock of 1980s–2000s homes means thousands of unfinished basements just waiting to become living space. PrimeStone Construction Group is a structural engineer–owned basement finishing contractor serving Aurora — handling moisture, egress windows, radon, and permits with the Aurora Building Division so your new space is legal, dry, and built to last.
How much does basement finishing cost in Aurora? Basement finishing in Aurora typically $30,000–$115,000+ (average around $65,000, or $65–$125/sq ft). Bathrooms, egress windows, and moisture work are the main cost drivers, and most projects take 6 to 10 weeks.
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Why Aurora Homeowners Choose PrimeStone for Basement Finishing
- Aurora’s #1 value project: So many Aurora homes were built in the 1980s–2000s with unfinished basements — finishing one adds legal square footage and strong resale value.
- Structural engineer–owned: Egress cutting and any structural work are engineered in-house — safer than a finish-only crew.
- Aurora permit management: We handle building, electrical, plumbing, and mechanical permits with the Aurora Building Division for you.
- Moisture & radon first: We assess moisture and radon before finishing — never covering a problem.
Basement Finishing for Aurora Homes
Aurora’s newer housing stock is generally in good structural shape, which often keeps basement projects straightforward — but every basement still needs a moisture assessment and radon check before finishing. Colorado has some of the highest radon levels in the country, and Aurora is no exception. If your home doesn’t already have a radon mitigation system, we recommend installing one before closing up walls. For a legal bedroom, we install a code-compliant egress window as part of the project.
- Legal bedrooms: Egress window, closet, heating/cooling, and finished walls to meet code.
- Bathrooms: Easier and cheaper if your home has existing rough-in plumbing (common in newer Aurora homes).
- Radon mitigation: Recommended before finishing, given Colorado’s high radon levels.
Basement Finishing Cost in Aurora
Finishing a basement in Aurora 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 by adding legal living space. Aurora’s newer homes often have rough-in plumbing already, which can lower the cost of adding a basement bathroom.
Permits for Basement Finishing in Aurora
Basement finishing in Aurora requires building, electrical, plumbing, and mechanical permits from the City of Aurora Building Division (15151 E. Alameda Parkway; 303-739-7420). Aurora requires registered contractors, and as of August 1, 2026, electrical work is reviewed under the 2026 National Electrical Code. Because Aurora spans Arapahoe, Adams, and Douglas counties, we confirm the correct requirements for your property.
Aurora permit and code requirements change. PrimeStone confirms current requirements with the Aurora Building Division for every basement project.
Full Basement Finishing Details
This page focuses on basement finishing specifically in Aurora. 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 Aurora?
Basement finishing in Aurora 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. Aurora’s newer homes often have rough-in plumbing, which can reduce bathroom costs.
Do I need a permit to finish my basement in Aurora?
Yes. Basement finishing requires building, electrical, plumbing, and mechanical permits from the Aurora Building Division, and Aurora requires registered contractors. PrimeStone manages the full permit process.
Does my Aurora basement bedroom need an egress window?
Yes. Any basement bedroom in Colorado requires a code-compliant egress window for emergency escape, along with a closet and proper heating/cooling. We install egress windows as part of the finishing project.
Should I test for radon before finishing my Aurora basement?
Yes. Colorado has some of the highest radon levels in the country. We recommend testing and, if needed, installing a radon mitigation system before walls are closed up.
Ready to Start Your Aurora Basement Finishing Project?
Turn your Aurora basement into a legal bedroom, family room, or full suite. PrimeStone’s structural engineer–owned team handles moisture, egress, radon, and permits from start to finish.
Get a Free Consultation → 720-468-0686 · info@primestonecg.com