How to Get a Garage Building Permit in Ontario (2025)

How to Get a Garage Building Permit in Ontario (2025 Guide)

Building a new garage is an excellent way to add storage, protect your vehicles, or create a functional workspace—but before you pour any concrete, there’s one essential step: getting a building permit in Ontario. Whether you’re planning a detached garage or an addition to your home, this 2025 guide walks you through the garage permit process in Ontario, step by step.

Why You Need a Garage Building Permit in Ontario

In Ontario, the Ontario Building Code (OBC) and local municipal bylaws require a building permit for most structures over 15 square metres (161 square feet). This includes the single-car and two-car garages we offer.

A building permit ensures your garage is:

  • Safe and structurally sound
  • Compliant with zoning laws
  • Positioned correctly on your property (setbacks and lot coverage)

You need a permit if your garage:

  • Is over 161 sq. ft.
  • Has a foundation or concrete slab
  • Will be attached to your home
  • Includes electrical or plumbing work
  • Is part of a secondary dwelling or living space

Step-by-Step: How to Get a Garage Building Permit in Ontario

Step 1: Check Local Zoning Requirements

Every municipality in Ontario has zoning bylaws that regulate:

  • Maximum garage size
  • Distance from property lines (setbacks)
  • Building height
  • Lot coverage percentage

Tip: Visit your local building department website or call them to get zoning rules specific to your property.

Step 2: Prepare Your Permit-Ready Drawings

Your building permit application requires detailed architectural drawings, including:

  • Foundation plan
  • Floor plan
  • Elevation views
  • Cross-sections
  • Construction details
  • Site plan showing garage location (Note: Site plans are not included in our packages and must be obtained separately.)

Pro Tip: Save time and money with pre-designed, permit-ready garage plans from Ontario Garage Plans. Every design complies with the Ontario Building Code, streamlining your permit process.

Step 3: Complete the Application Forms

Municipalities typically require forms such as:

  • Application for a Permit to Construct or Demolish
  • Schedule 1: Designer Information (provided with our plans)
  • Authorization forms if applying on behalf of someone else

Step 4: Submit Your Building Permit Application

Applications can be submitted online or in person depending on your municipality. Some cities now require digital submissions only. Include:

  • All completed forms
  • Construction drawings (PDF or hard copy)
  • Permit fees (vary by municipality)
  • Recent property survey (if required)
  • Grading and drainage plan (if required) – shows how stormwater runoff will be managed

Step 5: Wait for Review & Approval

The local building department reviews your application to ensure it meets zoning, structural, and safety regulations.

  • Typical review times: 5–20 business days
  • You may be asked to revise your plans if corrections are needed

Step 6: Start Building—With Required Inspections

Once approved, you’ll receive your permit and can begin construction. Call for inspections at key stages:

  • Footing and foundation
  • Framing
  • Final inspection

Frequently Asked Questions (FAQ)

How much does a garage building permit cost in Ontario?
Permit fees vary by municipality, often based on square footage. Expect anywhere from $150 to $1,000+ depending on location and project size.

Can I build a garage without a permit if it’s under 161 sq. ft.?
Yes. Small garages under 15 sq. m don’t require a permit, but zoning bylaws still apply (setbacks, height limits, etc.). Always check with your local municipality first.

Do I need an architect or engineer?
Stamped garage plans (like ours) usually remove the need for an architect. For complex or custom builds, an engineer may be required, especially for unique foundations or roof designs.

Final Thoughts: Building a Garage in Ontario in 2025

Getting a building permit might feel intimidating, but it protects your investment and keeps your project legal. By following these steps and using high-quality, permit-ready plans, you’ll be ready to build the perfect garage this year.

Need a Head Start?

Explore our Garage Plan Collection to find permit-ready designs built for Ontario homes. All of our plans comply with the latest OBC standards and are ready for fast approval.

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