Screening tool

    Screen your lot against Calgary's baselines

    Seven questions, matched to the figures the City publishes. It will tell you plainly where a property is unclear — it will never tell you a suite is approved.

    Rules last reviewed August 31, 2026

    Screening only — not an approval. This is a screening tool, not an approval. Nothing on this page confirms that a backyard suite can be built on a specific property — only the City of Calgary can do that through the development and building permit process.

    Question 1 of 7

    What type of home is on the property?

    Since August 4, 2026, backyard suites are not allowed on semi-detached properties.

    Minimum lot width

    9 m

    Rear setback

    1.5 m

    Side setback

    1.2 m

    Separation from main dwelling

    5.0 m

    Maximum height

    7.5 m

    Outdoor amenity area

    7.5 m² minimum

    Maximum suite area

    Commonly 75 m²

    Application review timeline

    60 days

    Have us look at the property

    Send the address and we will review the zone and the constraints with you — and tell you what only the City can answer.

    Your details go only to the CarriageHouses.ca team and are never sold. This is an inquiry form — replies come from a real person, not an automated advisor.

    Facts on this page are drawn from current City of Calgary pages and were last reviewed August 31, 2026. Rules change and every parcel is different. Verify current requirements with the City of Calgary before making any decision.