Ashburn, VA 20149

Garage Addition Contractors on Thumbtack cost$4500 - $80000

National average price

5 Garage Addition Contractors found near you!

  • Lowest price:$
  • Most common low price:$4500
  • Most common high price:$80000
  • Highest price:$

How much does building a garage cost?

A carpenter or contractor can build a new garage of any size for a home, business or commercial space or add space to an existing garage. Concrete, brick, metal, vinyl and wood siding are all materials that can be used to finish the exterior of a garage. The main entry doors can be roll-up, swing-up or sideways sliding. To create more than just a storage space, contractors can add electricity, plumbing, windows, coated floors, specialty storage space and an automatic door opener. Garage design can mimic that of the central house and can be either a stand-alone building or attached. Several factors affect the cost of building a garage.

Square footage

In general, the larger the project, the higher the price. Building larger garages requires more labor and material costs. The average cost per square foot to build a garage is between $30 and $40. Depending on the finish work of the project, the geographical location and other factors, it could be much higher.

Project scope

The total cost of a new garage depends on the terrain, the finishes, the size, and various extras. The geographic location and regional costs for labor also dictate garage building costs. Here are two examples of costs for different garages built by Mateo Homes in Kansas City, Missouri:

26 x 40 standard garage: $38,000

  • 1,040-square-foot space

  • Approximately three and one-half weeks to complete

  • Built on a hill, so had to pour a concrete wall for a level base, which increased labor and material costs

  • Installed electricity

  • Trusses for an open construction

  • Concrete floor with no insulation and exposed framing

  • One garage door with remote/automatic entry

  • Standard vinyl lap siding

40 x 80 upscale garage: $80,000

  • 3,200-square-foot space with two stories

  • Eight weeks to complete

  • Loft-style construction, with mezzanine storage

  • 14-foot ceilings

  • Auto repair lift installed

  • Specially constructed concrete flooring to accommodate auto lift

  • Installed electricity

  • Insulated walls and drywalled interior

  • Mid-level vinyl siding to match house

  • Poured 80 feet of concrete driveway from street to garage


Siding type has a huge influence on the overall cost of garage construction. According to Mateo Homes, Cement-based siding is typically the most expensive. Cement siding is great for avoiding termites and rot, but, in addition to high cost, the labor to install it is more expensive. Here are a couple other common siding options in the midwest, with average costs:

  • Vinyl: $2.50 square foot for product and installation (no need for paint)

  • Engineered wood, such as LP SmartSide: $6–$7 per square foot for product, installation and paint


Adding electricity to a garage is necessary if it will have a garage door opener, and overall construction costs will be higher.


A bathroom or wash station in a garage increases construction costs, particularly if the garage is not being built at the same time as a new home. In the process of digging sewage lines for new home construction, it’s not much more work to add a line to the garage at the same time. When a garage is built later, contractors will have to find the sewer lines, dig everything up and install the additional plumbing—all of which will add to the overall cost.


It costs more to construct a stylized garage that matches the house or that has a special architectural design. Other additions such as windows, extra garage doors or custom interior finishes also cost more. In general, Mateo Homes charges about $30,000 "for something decent with a few extra options in the Kansas City area." And the project will take about four weeks to complete.

Pro tip:

  • Before you begin requesting bids, do some research to understand what your size restrictions are. According to Mateo Homes, in some cities, a garage can’t be more than a certain percentage of the lot square footage. Knowing this number will determine the project size before you request quotes.

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