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Home Addition Permits Ontario

Running out of space? Whether you’re adding a second storey, extending at the back, or building out to the side, we prepare BCIN-certified drawings for home additions that meet Ontario Building Code. Our plans include the structure, layouts, and elevations municipalities expect — so your addition moves forward without costly delays.

What's Included

  • Existing & proposed floor plans with full dimensions

  • Roof plans, elevations, and sections

  • Structural notes: beams, lintels, columns, foundations

  • Ontario Building Code details for height, coverage, fire separations, and exits

  • HVAC design for the new space (duct layouts, sizing, and integration)

  • Permit-ready drawings designed for municipal approval

Pricing and Turnaround

  • Typical first draft: 10–15 business days (depending on complexity)

  • Pricing depends on size (single vs. multi-storey), structural involvement, and municipality requirements

  • Clear, upfront costs with optional add-ons quoted separately

FAQ's

Do I need a permit for every addition?
Yes. Any structural expansion of your home requires a building permit in Ontario.

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Can I add a second storey to my bungalow?
Often yes, but it depends on your existing foundation and structure. Engineering review is usually required.

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Will my addition need HVAC drawings?
Yes. Municipalities require HVAC details for any addition, and we include them in your drawing set.

Get Permit Drawings for your Addition

Have you checked with the City to ensure what you are planning is within the zoning and setbacks for the property?

Want to learn more? 

Check out our other residential design project types here

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