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Garage Conversion Cost in Thornton, CO
Detailed pricing guide with local market adjustments and material comparisons
Thornton Average
$17,250–$46,000
Market Tier
Large City
Cost Breakdown
Garage Conversion Cost in Thornton
Large CityLowAverageHigh
$17,250$31,625$46,000
Market Tier
Large City (1.15x)
Large city with competitive market and moderate-high costs
Material Cost Comparison
Framing lumber(Budget)
$12,938–$34,500Insulation(Mid-Range)
$17,250–$46,000Drywall(Premium)
$24,150–$64,400Factors that affect your cost
- Garage size
- Scope (room vs full ADU with kitchen/bath)
- Foundation and floor leveling
- Insulation and drywall
- Window and door installation
- HVAC extension
- Electrical and plumbing
- Permit and zoning requirements
- Parking replacement
Get Quotes in Thornton
Thornton Housing Market
Median Home Price
$486,990
Homes for Sale
147
Price per Sq Ft
$238
Local Pros
600
Home Service Professionals Near Thornton
Agents 115lender 89multimedia_specialist 80Landscapers 68Roofers 67Electricians 62Painters 61Flooring 58
Median Household Income
$100,985
Median Home Value
$482,200
Median Rent
$1,810/mo
Homeownership Rate
73.1%
Population
142,878
Median Year Built
1996
Source: U.S. Census Bureau, ACS 2023 5-Year Estimates
Track Your Costs
Renovation
Garage Conversion
Date
April 2026
Cost
$31,625
Vendor
Your local pro
Warranty
5-year material warranty
Thornton average: $17,250–$46,000
Before
Issue documented with photos
After
Repair completed, area sealed
Materials Used
Framing lumberInsulationDrywallFlooring
Warranty Details
5-year material warranty
Auto-Checkup Created
"Conversion Inspection" — every 24 months
Added by youApril 2026
Property Health Score
Good
82
interior category +12 pts(70 → 82)
Documentation19/25
Maintenance20/25
Warranty22/25
Investment21/25
Your health score is calculated based on documentation completeness, maintenance currency, warranty coverage, and investment tracking.
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SM
Smith & Sons
Connectedremodeling contractor
4.9(47)
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JR
J&R Home Services
remodeling contractor
4.7(23)
From $95/hr
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Title:remodeling
Category:remodeling contractor
Date:2026-04-08
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Cost FAQ
What is the average cost of garage conversion in Thornton?
The average cost of garage conversion in Thornton, CO ranges from $17,250 to $46,000. The final price depends on Garage size, Scope (room vs full ADU with kitchen/bath), Foundation and floor leveling.
What factors affect garage conversion cost?
Key factors include: Garage size, Scope (room vs full ADU with kitchen/bath), Foundation and floor leveling, Insulation and drywall, Window and door installation, HVAC extension, Electrical and plumbing, Permit and zoning requirements, Parking replacement. In Thornton, local labor rates and material availability also influence pricing.
How do I get accurate quotes for garage conversion in Thornton?
Get at least 3 quotes from licensed professionals in Thornton. Use Fizbo SmartSearch to find and compare local remodelings, read reviews, and request estimates — all in one place.