The average cost of a garage addition

Updated February 21, 2017

Adding a garage to your home is one way to add value and usable space, as well as protecting your car or truck from the elements. However, home renovations can be pricey. Learn the potential costs before getting started.


Larger garages normally cost more, which can encourage cost-conscious homeowners to keep things cosy. However, a too-small garage can create space problems. According to Garaga, a single garage should be at least 3.5 m (12 feet) wide by 6.5 m (22 feet long) (264 square feet), and a double garage should be 5.5m (18 feet) wide by 6.5 m (22 feet) long (396 square feet). Building bigger can bring the price up. Costhelper says an 850-square-foot garage with plenty of storage space could cost £24,700 or more.


Professionally-built garages cost more than doing it yourself. According to CostHelper, contractors usually charge £22 to £29 per square foot for a basic garage, and up to £35 per square foot for a garage built with higher quality materials. For a basic single-car garage, that comes to between £6,006 and £7,722. A higher-end, single-car structure might cost as much as £9,438.


If you have more experience with building projects, you may want to do some or all of the work of adding a garage yourself. CostHelper lists the price of materials for a simple single-car garage at £1,950 to £2,600. A garage kit with partially pre-cut or prefabricated materials costs anywhere between £3,250 and £9,100.

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About the Author

G.D. Palmer is a freelance writer and illustrator living in Milwaukee, Wis. She has been producing print and Web content for various organizations since 1998 and has been freelancing full-time since 2007. Palmer holds a Bachelor of Arts degree in writing and studio art from Beloit College in Beloit, Wis.