Second-Storey Addition Permit
PermitsHub handles your second-storey addition building permit from drawings to approval in Toronto and the GTA.
Scope of service.
Adding a second storey to your home in Toronto or the GTA requires a building permit under the Ontario Building Code. This permit ensures your addition meets structural load requirements, fire separation standards, energy efficiency targets, and zoning regulations including height limits, setbacks, and lot coverage. The permit process involves structural engineering, architectural drawings, and coordination with multiple city departments. Second-storey additions are complex projects that affect your home's foundation, existing structure, and neighbourhood context. Toronto Building requires detailed structural plans showing how the existing foundation and framing will support the new load, plus compliance with Part 9 housing requirements or Part 3 if your home exceeds certain size thresholds. PermitsHub manages the technical submissions, responds to city reviews, and ensures your project meets all code and zoning requirements so you can focus on your renovation.
- Structural engineering drawings and load calculations for existing foundation and new second storey
- Architectural plans showing floor layouts, elevations, and building envelope details
- Zoning review for height limits, angular plane compliance, setbacks, and lot coverage
- HVAC, plumbing, and electrical drawings for second-storey systems
- Energy efficiency compliance (SB-10 or Toronto Green Standard as applicable)
- Building permit application submission and review management with Toronto Building or your municipal building department
Who needs this
You need this permit if you are adding a full or partial second storey to a single-storey home, or expanding an existing second storey beyond its current footprint. This applies to detached, semi-detached, and townhouse properties in Toronto and GTA municipalities.
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
Second-Storey Addition Permit - your questions
Get started
Ready to start your second-storey 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