How much does it cost to build a detached garage in Minneapolis?

A new detached 2-car garage on a new slab typically costs between $60,000 and $80,000. This includes the new slab foundation, service door, and electric overhead door. Garage repairs generally range from $15,000 to $35,000. Construction typically takes 2 months.

What is the average cost to finish a basement in the Twin Cities?

Basement finishing projects typically range from $100,000 to $140,000. This price covers converting unfinished space into a bedroom and living area. These projects typically take 3 months to complete.

How much does an attic remodel or expansion cost?

Attic remodeling costs typically range from $120,000 to $150,000 for converting unfinished space into a bedroom and living area. Adding a bathroom or dormers will increase the cost, with dormers typically adding around $55,000. These projects typically take 3 months.

Prima Construction

Project Costs

Real ranges for general contractor projects across the Twin Cities.

Beyond kitchens and baths, we take on the bigger jobs too — garages, basement and attic conversions, and additions — across older Twin Cities homes. We’re a licensed Minnesota builder (#BC792052). The ranges below come from real Prima projects; most run on a fixed-price contract, and your exact number is put in writing after a site visit.

Garage construction

$60–80K

A 2-car garage on a new slab — service and electric overhead door, new slab foundation. Garage repair is typically $15–35K.

About 2 months

Basement finishing

$100–140K

Unfinished space converted into living space — a bedroom and living area.

About 3 months

Attic remodeling

$120–150K

Unfinished space converted into a bedroom, living area, and bathroom. Adding dormers tends to add ~$55K.

About 3 months

For a broader benchmark, the Remodeling “Cost vs. Value” report shows typical Twin Cities remodeling costs and the resale ROI. Our projects tend to come in below the regional average — we keep overhead low and use our own in-house crew instead of a chain of subcontractors.

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