Home Extension / Rear Addition Permit
PermitsHub handles all permit applications and approvals for home extensions and rear additions in Toronto and the GTA.
Scope of service.
A home extension or rear addition requires a building permit from your local municipality in Toronto or the GTA. This permit confirms that your addition meets Ontario Building Code requirements, zoning bylaws, setback regulations, and lot coverage limits. Most rear additions involve structural changes, new foundations, electrical and plumbing systems, and exterior modifications that all require municipal review and approval before construction begins. PermitsHub prepares architectural drawings, navigates zoning compliance, and manages the entire permit application process with your local building department. We work with homeowners, contractors, and architects to ensure your rear addition meets all regulatory requirements and receives approval without unnecessary delays or resubmissions.
- Single-storey and two-storey rear additions
- Foundation plans and structural drawings for the extension
- Zoning review for setbacks, lot coverage, and height restrictions
- Building permit application and submission to municipal building department
- Coordination with structural engineers for load calculations and beam specifications
- HVAC, electrical, and plumbing permit coordination if required separately
Who needs this
You need this permit if you are adding square footage to the rear of your home, whether a single-storey bump-out, full two-storey addition, or expanded kitchen and living space. Any addition that involves a new foundation, structural walls, or roof extension requires a building permit before construction starts.
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
Home Extension / Rear Addition Permit - your questions
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Ready to start your home extension / rear addition 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