R-CG and R-G (the new baseline)
In August 2024 Calgary adopted city-wide "base residential" rezoning. Most single-family lots were converted to R-CG(grade-oriented infill) or R-G — both of which allow secondary suites and backyard suites as permitted uses. The practical result: on a typical Calgary lot, a secondary suite no longer needs a discretionary approval, only permits.
R-C1, R-C2 and legacy districts
Not every property was rezoned. Homes still in R-C1, R-C2, R-1 or R-1s may allow secondary suites as a discretionary use — meaning City planners weigh neighbour input before approving the Development Permit. Discretionary DPs can be appealed to the Subdivision and Development Appeal Board.
Backyard & garage suites
Backyard suites (garden and garage suites) share the same use allowances as basement suites in R-CG/R-G, but must also meet setback, height and site-coverage rules. Maximum height is typically capped at one storey above the roofline of the garage.
How to check a specific property
- Open the City's Zoning Map at calgary.ca/planning/landuse.
- Search the address. The current land use district is coloured on the map and shown in the sidebar.
- Click through to the Land Use Bylaw section for that district to confirm secondary suites are listed as a permitted use.