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Garage Addition Cost Estimator
Estimate the cost to add a garage to your home — attached or detached. Compare 1-car, 2-car, and 3-car garage addition prices.
2-Car Addition (24×24)
$58,752 – $79,488
stick-built, standard finish
3-Car Addition (36×24)
$88,128 – $119,232
stick-built, standard finish
Average-cost region. Adjust below for your exact specs.
Your Shop Build
Set the size, type, and finish for your shop or outbuilding.
576 sq ft
Insulation, electrical, finished walls — typical functional build.
Typical pricing for most U.S. markets. If unsure, start here.
Remote areas often fall into high-cost due to limited labor and material access.
Site Work & Utilities
Most shops need at least concrete and electrical — toggle what applies.
Estimated Project Cost
$58,752–$79,488
Stick-built shops offer the most flexibility for finished interior spaces, but are typically the highest cost.
Stick Built costs roughly $37,440 more than Pole Barn at this size. Consider whether the added features justify the premium.
Based on typical U.S. construction costs for your selected finish & region.
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How Much Does a Garage Addition Cost?
A garage addition costs between $25,000 and $190,000+ depending on whether you're adding an attached or detached garage, the size, building type, and finish level. An attached 2-car garage addition (24×24) typically runs $65,000–$85,000 for stick-built construction that matches your home's exterior. A detached garage addition can be cheaper if you choose a pole barn or steel building.
Garage Addition Cost by Size
Standard finish, average-cost region. Includes structure, foundation tie-in, and basic electrical.
| Garage Type | Size | Attached | Detached |
|---|---|---|---|
| 1-Car Garage | 12×24 (288 sqft) | $30k – $50k | $25k – $45k |
| 2-Car Garage | 24×24 (576 sqft) | $65k – $85k | $50k – $80k |
| 3-Car Garage | 36×24 (864 sqft) | $95k – $130k | $75k – $120k |
Average-cost region. Attached garages assume stick-built to match existing home. Detached costs assume the cheapest appropriate type.
Attached vs Detached Garage Addition
An attached garage addition connects directly to your home. It must match your home's roofline, siding, and architectural style — which generally means stick-built construction. The main advantage is convenience (walk directly from house to garage) and typically higher resale value.
A detached garage addition is a standalone structure. It gives you more building type options (pole barn, steel, or stick-built), more flexibility on size and placement, and keeps noise and fumes away from the house. See our detached garage cost estimator for detailed breakdowns.
What's Included in a Garage Addition Cost?
- Foundation: concrete slab or stem wall (~$8/sqft)
- Structure: framing, roofing, siding, garage door(s)
- Electrical: lighting, outlets, panel connection (~$5/sqft)
- Finishing: drywall, paint, insulation (varies by finish level)
- Permits & plans: typically $500–$2,500 depending on jurisdiction
For attached garages, add $3,000–$8,000 for tie-in work connecting the new structure to your existing home (roofline integration, wall removal, siding match).
Does a Garage Addition Add Value to Your Home?
Yes — a garage addition typically recoups 60–80% of its costin resale value. In markets where most homes have garages, not having one can reduce your home's value by 5–10%. An attached 2-car garage addition is one of the better ROI home improvements. Use our garage cost calculator to estimate your project and compare options.