NBC baseline
The National Building Code requires that interior alterations maintain or improve existing fire safety, egress, and accessibility performance. A change of occupancy may trigger upgrades.
Canadian building code question
What are the building code requirements for commercial tenant fit-outs in Canada?
Commercial tenant fit-outs must comply with the building code for fire safety, accessibility, ventilation, and egress even when the work is interior-only. Building permits are typically required, and the new use must be checked against the existing building's approved occupancy classification.
Tenant fit-outs are one of the most common building permit categories in Canadian cities. Whether converting an empty shell to a new restaurant, office, or retail space, the building code requirements for interior construction apply fully, and a change of use can trigger additional compliance obligations.
What to check first
- Building permits are required for most commercial fit-outs involving partitions, mechanical, electrical, or plumbing work.
- Fire safety requirements including rated corridors, exit access, and sprinkler coverage must be maintained or upgraded.
- Accessibility requirements apply to the tenant space and may extend to common areas and washrooms.
Jurisdiction notes
Provincial enforcement
Provincial code adoption determines the specific requirements. Some provinces have enhanced requirements for tenant spaces in areas like energy code compliance.
Municipal permit process
Municipal permit processes for tenant fit-outs vary in scope and timeline. Some municipalities have expedited processes for minor fit-outs.
Work through it in this order
- Determine whether the proposed use matches the existing occupancy classification — if not, a change of use review is required.
- Calculate the occupant load for the new tenant space and verify that exit capacity is sufficient.
- Confirm that fire separations, sprinkler coverage, and fire alarm zones are appropriate for the new layout.
- Design the space to meet barrier-free access requirements including accessible washrooms if required.
- Submit permit applications with construction drawings showing code compliance for the new layout.
Common questions
Do I need a building permit for a tenant fit-out?
Yes, most commercial interior renovations that involve partitions, mechanical, electrical, or plumbing work require a building permit.
What triggers a change of occupancy in a fit-out?
Changing the space's use — for example, from office to restaurant, retail to assembly, or any other occupancy classification change — triggers a change of occupancy review with potentially significant code implications.
Are accessibility upgrades required for a tenant fit-out?
Barrier-free access must be provided within the new tenant space. In some jurisdictions, fit-outs above a cost threshold may trigger accessibility upgrades to common areas as well.