Canadian home permit research
Secondary suites & ADUs
A new dwelling unit can engage building, zoning, parking, fire-safety and servicing requirements.
Reviewed Sep. 13, 2026National project guidance review date
Questions that can change the permit path
- Is the property eligible for the proposed dwelling unit?
- Will a separate entrance or egress be created?
- What fire and life-safety requirements apply?
- Are parking, servicing or utility changes required?
Why the municipality matters
Secondary suites & ADUs rules sit alongside local zoning, property constraints and municipal application systems, so the answer can change by address and scope rather than by project name alone.
A practical research sequence
- For Secondary suites & ADUs, write down the exact scope, location and dimensions the municipality would need to understand.
- For Secondary suites & ADUs, flag any structural, plumbing, electrical, gas, HVAC or change-of-use component that changes the approval path.
- Check the municipality’s guidance for Secondary suites & ADUs together with the zoning or setback rules that affect the property.
- Confirm whether the Secondary suites & ADUs scope also needs a separate trade, development or planning approval.
- Before starting secondary suites & adus, confirm the required drawings, forms, fees and inspection sequence.
Research note
This national project guide is procedural. Local thresholds, exemptions, fees and timelines are only published on city guides when verified from an official authority.