Provincial starting point
Alberta: municipal zoning decides where suites are allowed.
The Alberta government describes a secondary suite as a self-contained unit within a house and states that municipalities may create land-use bylaws allowing secondary suites and decide where those bylaws apply. That means the provincial building-code rules do not create a blanket province-wide zoning entitlement.
For a project, check the municipality's land-use district first, then the development/building permit path and Alberta code requirements. The province specifically requires independent heating and ventilation for the primary dwelling and secondary suite under the National Building Code – Alberta Edition.
Provincial framework reviewed September 20, 2026. No B.C.-style province-wide 3/4/6-unit zoning baseline was identified in the current Alberta sources reviewed here.