A 24 by 24 foot detached garage is 576 square feet (about 53.5 m²). It is a common two-car size, with room across the front for two overhead doors.
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At 576 sq ft (about 53.5 m²), this garage is larger than the 10 m² (about 108 ft²) size above which Barrie, Ottawa and Waterloo say a detached garage needs a building permit. See the city guides: Barrie, Ottawa, Waterloo. Other cities have their own rules, so check with yours.
Guides: Barrie garage permits · Ottawa garage permits · Waterloo garage permits · 24x24 garage plans · 12x20 garage plans
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