Home permit guide
Home addition permits
An addition usually needs municipal review. Zoning, setbacks, lot coverage, structure and servicing are common parts of the application.
Updated September 24, 2026
The short answer
Additions almost always require building review and commonly trigger zoning/setback/site-coverage checks before technical building review.
Check zoning before finalizing the design. A code-compliant addition can still be too large, too tall or too close to a property line.
What to check first
- Setbacks and lot coverage
- New floor area and height
- Foundation and structural work
- Plumbing and mechanical changes
Check the rule in your city
Choose your municipality for the local permit rule, thresholds and official source.
How the rule changes by city
- Airdrie, AB: Airdrie lists residential additions among projects that require permits. Official source ↗
- Abbotsford, BC: Abbotsford publishes a building-permit application route and checklist for residential additions. Official source ↗
- Winnipeg, MB: Winnipeg explicitly states that all house additions and attached garages need both a development permit and a building permit. Official source ↗
If a permit is required
What you may need to submit
Survey/site plan; architectural floor plans/elevations; foundation/framing; structural engineering where required; energy/mechanical information.
Inspections
Foundation, framing, insulation, plumbing/mechanical and final/occupancy inspections may apply.
Use the local guide before you start
Permit rules, exemptions and application routes are set locally. Open your municipality guide before relying on a threshold or starting work.
Find your municipality →