The City of Calgary has pretty specific rules about where and how big your garage can be. From experience, this is where most DIY homeowners run into trouble. Here are the key ones to know:
Size restrictions – A standard detached garage cannot exceed 75 m² (about 807 sq. ft.) per dwelling unit on the lot. If your garage would be larger than the existing house, you'll need additional approvals.
Setbacks – This means how far your garage must sit from your property lines. Side setbacks are typically 0.6 metres, with 1.2 metres required on street-facing sides. For rear alley-access garages, setbacks vary depending on your zone and lane type – always confirm with the City.
Height – Maximum building height for a detached garage is 4.6 metres (about 15 ft.) to the peak of the roof. The wall height from the parking surface to where the wall meets the roof truss is capped at 3.0 metres. If you're planning storage trusses or a loft above, measure carefully.
Lot coverage – Your garage footprint plus your house can't exceed the lot coverage maximum for your zoning district. This catches people off guard when they have a big house and then want a big garage.
One thing many homeowners don't realize: even if your garage meets all these numbers, you still need to check for utility easements. Those underground gas lines, power lines, or sewer pipes might run right where you want to dig footings. The City won't let you build over an easement, and discovering one after you've poured a slab is a very bad day.
Zoning Details and Size Restrictions
Your specific zoning district – R-C1, R-C2, R-G, and others – each has its own rules. A garage that's fine in Mount Pleasant might not be permitted the same way in Chaparral. That's why we always pull the property's zoning information before drawing up any plans. Calgary's Land Use Map is publicly available, but interpreting it correctly is a different story.