Do You Need a Permit for a Steel Building in Ontario?

One of the questions we answer most often for Ontario clients is whether a permit is needed for a steel building, and what it takes to get one. Here's the overview. Your local municipality is always the final authority.

Short answer: almost always, yes

Under the Ontario Building Code, a building permit is generally required for any new building larger than 10 m² (about 108 sq ft), and that includes pre-engineered steel buildings. Commercial, industrial and agricultural buildings all need permits. Farm buildings still need permits in Ontario, though some code requirements differ for low-occupancy farm buildings.

What the municipality will typically ask for

• Engineered building drawings stamped by a Professional Engineer licensed in Ontario, showing loads, frames and connections.
• Foundation drawings designed for the building reactions and soil conditions.
• Site plan showing the building location, setbacks, driveways and drainage.
• Architectural drawings for occupied buildings, including floor plans, exits, fire separations and energy compliance.
• Mechanical and electrical details where applicable.

Zoning and other approvals

Before the building permit, the use and size must comply with the local zoning by-law: permitted use, setbacks, height and lot coverage. Depending on the property, you may also need:

• Site plan approval, common for commercial and industrial properties.
• Conservation authority approval near rivers, lakes, wetlands or floodplains.
• Minor variance if the building doesn't fit zoning setbacks or height.
• Entrance permits for new driveways onto regional or provincial roads.

How long does it take?

For a straightforward building, Ontario municipalities are required to review complete applications within set timeframes, commonly 10 to 30 business days depending on building type. Zoning issues, site plan approval or conservation authority reviews can add weeks or months, so start early. Steel fabrication can be scheduled in parallel once the design is locked.

Tips to avoid delays

• Talk to the municipal planning department about zoning before you finalize the size.
• Get a soil report early if the site is uncertain. It affects the foundation design.
• Submit a complete package. Missing drawings are the most common reason for delays.
• Make sure your supplier provides stamped drawings for your site's loads, not generic ones.

We handle permits for you

Permit services are part of what we do. Meta Steel Buildings is registered with Professional Engineers Ontario, and we prepare the engineered drawings and coordinate the application with your municipality. See our services, or start a quote and we'll walk you through what your site will need.

Frequently Asked Questions

Do I need a permit for a steel building in Ontario?

Generally yes. The Ontario Building Code requires a building permit for new buildings over 10 m² (about 108 sq ft), including pre-engineered steel buildings, commercial buildings and farm buildings.

Do farm buildings need a building permit in Ontario?

Yes. Farm buildings require building permits in Ontario, although some code requirements differ for low human occupancy farm buildings.

What drawings do I need for a steel building permit?

Typically stamped structural drawings from an Ontario-licensed engineer, foundation drawings, a site plan, and architectural, mechanical and electrical drawings where the building will be occupied.