Guide

    Buying a home that already has a backyard suite

    An existing suite is an asset when the paperwork supports it and a liability when it doesn't. Here is the due diligence to do before conditions come off.

    Documents to request

    • Development permit and building permit for the suite.
    • Trade permits and final inspection records.
    • Architectural and structural drawings as built.
    • Real property report with compliance stamp, if available.
    • Any correspondence with the City about the suite.

    Questions to answer before conditions come off

    • Was the suite permitted and inspected, or is its status unverified?
    • What is the land use district, and was the suite permitted or approved discretionarily?
    • Is the property semi-detached? Backyard suites are not allowed on semi-detached properties.
    • Does the property also have a secondary suite? Only one of the two is allowed.
    • How is the parking requirement satisfied on site?
    • How are utilities configured — shared or separately serviced and metered?
    • Is the suite tenanted, and on what terms? Existing tenancies transfer with obligations.
    • Will your insurer cover the property as configured?
    • How does your lender treat the suite and any rental income? Ask them directly — see financing.

    If the suite is unpermitted

    An unpermitted suite is not automatically a dealbreaker, but it is a different purchase. Bringing one into compliance runs through the same City process as a new build, and whether it can be brought into compliance at all depends on the zone, the lot and the construction. Get the City's position before you rely on that income.

    If you are buying a lot to build on instead

    Screen it with the feasibility tool, price the build with the cost-driver worksheet, and start your search on the buy page.

    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.

    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.