Building Permits for Home Additions in Toronto — 2026 Guide

What You Need to Submit

The City requires a complete, professionally prepared application package submitted digitally through Toronto Building. A complete application for an addition must include:

Core Forms

• Application for a Permit to Construct or Demolish (updated February 16, 2026)
• Designer Information form (Schedule 1 — lists your designer's BCIN credentials)
• Energy Efficiency Design Summary form (SB-12 compliance)

Drawings

• Site plan showing property lines, building footprint, proposed addition dimensions, setback measurements, lot coverage, and grading/drainage
• Architectural drawings including fully dimensioned floor plans for every level, exterior elevations with heights and materials, and cross-sections showing material assemblies and insulation values
• Structural engineering drawings with foundation plans, wall framing details, beam specifications, and connection details — stamped by a licensed structural engineer

Additional Declarations (as applicable)

• Tree declaration if construction is near protected trees
• Infill Public Notice declaration for additions larger than 100 m²
• Heritage Alteration Permit application if your property is in a Heritage Conservation District

2026 Fee Schedule

The City implemented a 4.82% fee increase effective January 1, 2026. Permit fees are calculated based on the square footage of proposed work.

Mechanical, HVAC, and plumbing permits carry additional fees. For the full fee schedule, refer to toronto.ca/building-permits.

How Long Approval Takes

The Ontario Building Code mandates a 15 business day review period for complete residential applications. However, the clock only starts when the City considers your application entirely complete — all drawings aligned, engineering stamped, and zoning cleared.

In practice, your application is reviewed by two separate examiners: a zoning examiner (checking setbacks and heights) and a building code examiner (checking structural and fire safety). If either finds a deficiency, they issue a notice and the clock pauses until you submit corrections.

Realistic Timelines

Common Reasons for Delays

Most permit delays come from incomplete or incorrect submissions. The most frequent causes are:

• Missing or outdated forms (the application form changed in February 2026)
• Drawings that do not match zoning requirements (setbacks, lot coverage, FSI)
• Missing structural engineer stamp
• Incomplete energy efficiency documentation
• Failure to address tree protection or heritage requirements upfront

Committee of Adjustment

If your addition design cannot meet one or more zoning requirements — for example, it exceeds the maximum height or encroaches on a required setback — you need approval from the Committee of Adjustment for a minor variance. This process includes a formal hearing, public notice to neighbours, and an appeal window. Plan for 3–6 months of additional pre-construction time.

Next Steps

Preparing a complete permit package requires coordination between your designer, structural engineer, and contractor. Starting this process early prevents the most common source of project delays. Learn more about our home additions services and how we handle permit applications from start to finish.