Garage Cost Calculator
Estimate a new garage. Pick the size, attached or detached, finish, and your region to see a cost range and per-square-foot price.
Garage size
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Get quotesDetached vs attached
Detached garages cost more per square foot \u2014 own foundation, four walls, separate utilities \u2014 while attached garages share a wall and run cheaper. Finishing the interior adds roughly 30%.
How it’s calculated & sources
Cost = floor area × per-sq-ft rate (detached or attached) × finish factor. Estimates are then scaled by a regional construction-cost factor for your area (U.S. average = 1.00).
Cost ranges from 2025–26 national home-improvement data (HomeAdvisor, Angi, Fixr and industry guides); regional factors approximate RS Means-style city cost indices. National average 2-car detached garage \u2248 $40,000 \u2014 $40\u201375/sq ft detached, $30\u201355/sq ft attached.
Results update as you type and are estimates, not a quote — site conditions, permits, and finishes move the final number. Verify with local pros.
Worked example
A 2-car detached shell (576 sq ft) runs about $32,000 nationally; finishing the interior pushes it toward $41,000.
Frequently asked questions
Does this include the driveway or opener?
No \u2014 it covers the structure. Aprons, driveways, and openers are add-ons.
Why is detached more expensive?
Its own foundation, four exterior walls, and separate utility runs.
How does region change it?
We scale by a regional cost factor, so labor-heavy regions cost more.
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