Accessory Dwelling Unit (ADU) Permit
PermitsHub handles your ADU permit application, drawings, zoning compliance, and approvals across Toronto and the GTA.
Scope of service.
An Accessory Dwelling Unit (ADU) is a self-contained residential unit on the same lot as your primary home. In Toronto and the GTA, ADUs include basement apartments, laneway suites, garden suites, and second units above garages. These units require building permits to ensure they meet Ontario Building Code requirements for fire separation, egress windows, ceiling heights, and independent services. Municipal zoning bylaws govern where ADUs are permitted, maximum unit sizes, parking requirements, and lot coverage limits. Toronto's laneway suite program has specific design guidelines. Mississauga, Brampton, and other GTA municipalities each have distinct ADU regulations. PermitsHub prepares compliant drawings, navigates zoning requirements, and manages your permit application through to approval.
- Basement apartment conversions with separate entrance and services
- Laneway suites and garden suites as detached ADUs
- Second units above detached garages
- Zoning compliance review for unit size, setbacks, and parking
- Building Code compliance for fire separation, egress, and accessibility
- Architectural and structural drawings stamped by licensed professionals
Who needs this
Homeowners creating a basement apartment, building a laneway or garden suite, or converting space above a garage into a rental unit need an ADU permit. You also need this permit if you're legalizing an existing unpermitted secondary suite.
Included as standard
- City-compliant permit drawings
- Zoning & by-law review
- Application submission
- Revision management
Four steps to an approved permit.
01
Consultation
Free scoping call to review your project, lot and goals. No pressure, no fee.
02
Drawings & Zoning
City-compliant permit drawings and full zoning compliance review.
03
Submission
Application filed with the City. We manage every revision round to closure.
04
Permit Approved
Stamped permit in hand. Ready to build with confidence.
Express City fast-lane available for eligible small residential projects - timeline depends on project type and City queue
Accessory Dwelling Unit (ADU) Permit - your questions
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Ready to start your accessory dwelling unit (adu) permit?
Free, no-pressure quote within one business day.
● Flat-rate quotes - no surprise fees
● Revisions included until approval
● Most enquiries responded to same day