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Garage Conversion Cost in Collinsville, IL
Detailed pricing guide with local market adjustments and material comparisons
Collinsville Average
$12,750–$34,000
Market Tier
Small City
Cost Breakdown
Garage Conversion Cost in Collinsville
Small CityLowAverageHigh
$12,750$23,375$34,000
Market Tier
Small City (0.85x)
Small city with below-average costs
Material Cost Comparison
Framing lumber(Budget)
$9,563–$25,500Insulation(Mid-Range)
$12,750–$34,000Drywall(Premium)
$17,850–$47,600Factors 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 Collinsville
Collinsville Housing Market
Median Household Income
$65,170
Median Home Value
$157,700
Median Rent
$979/mo
Homeownership Rate
64.8%
Population
24,126
Median Year Built
1970
Source: U.S. Census Bureau, ACS 2023 5-Year Estimates
Track Your Costs
Renovation
Garage Conversion
Date
April 2026
Cost
$23,375
Vendor
Your local pro
Warranty
5-year material warranty
Collinsville average: $12,750–$34,000
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
83
interior category +12 pts(71 → 83)
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 Collinsville?
The average cost of garage conversion in Collinsville, IL ranges from $12,750 to $34,000. 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 Collinsville, local labor rates and material availability also influence pricing.
How do I get accurate quotes for garage conversion in Collinsville?
Get at least 3 quotes from licensed professionals in Collinsville. Use Fizbo SmartSearch to find and compare local remodelings, read reviews, and request estimates — all in one place.