Calgary’s existing secondary-suite guide describes fire-safety checks and distinguishes some requirements by when the suite was built. The guide is a starting point for the City process; it does not establish that a particular suite is permitted, qualifies for an existing-suite route, or is ready for occupancy. Confirm the permit history, building details, and applicable requirements with the City before relying on a checklist.
Start with the suite’s history and exit route
Record when the suite was built, what work has been done, and which permits or inspections can be found. The City’s guide treats suites built before March 12, 2018 differently for some requirements. That date alone does not establish that a suite qualifies for a reduced requirement or has been approved.
For each bedroom, check the required escape window and any window well against the City’s current dimensions and clearance instructions. Calgary’s guide gives a minimum unobstructed opening area of 0.35 m² and no opening dimension below 380 mm. It lists at least 550 mm of clearance in front of an existing window well and 760 mm when installing a new window. A window’s presence does not by itself show that the escape opening meets the applicable rule. Ask the safety codes officer to confirm the measurements and route for the specific suite.
Check separation, alarms, and mechanical-room access
The City’s existing-suite material describes smoke-tight separation between the suite and the rest of the house. It specifies at least 12.7 mm drywall on the ceiling and both sides of separating wall studs, with joints taped and filled; service penetrations must be fitted and sealed. The mechanical-room separation has its own drywall and sealing checks. The City also calls for a solid mechanical-room door with a self-closing device and says the exit path cannot pass through that room. Confirm how the applicable separation is to be verified with the safety codes officer.
The City lists smoke alarms at or near the ceiling on each floor level in both the primary dwelling and suite, and in each bedroom, common space, and supplementary space such as a mechanical room. Its guide also describes interconnection between the suite alarms and at least one alarm in the main dwelling. Confirm the required layout and electrical permit for any new wired alarms. The guide calls for additional opening protection checks when the suite’s only exit is served by an exterior staircase and a window or opening is directly above it; check the exact applicable conditions with the City.
Keep permits and inspections in the same checklist
Ask the City which development, building, electrical, plumbing, and heating permits apply to the work. The City lists a framing (rough-in) inspection and a final inspection for secondary suites; trade-permit inspections may also apply. Keep work that requires inspection accessible before it is covered by insulation, vapour barrier, or drywall, and keep the permit record, inspection results, and correction notices together. The current permit record and work scope determine which checks apply.
A useful first discussion with the City includes the suite’s construction date and layout, bedroom escape openings and wells, separation and service penetrations, alarm arrangement, mechanical-room access, exterior stairs, permit history, and inspection record. For broader questions about the code edition and project classification, see the code and classification guide. The fire-safety overview and conversion and inspection guide explain the related checks at a wider level.
Calgary’s guide helps identify questions for the local authority; it is not a construction specification or a legalization decision. The City and the responsible safety codes officer determine the requirements and inspection outcome for an individual suite.