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Basement Renovation Permit Drawings in Ontario

Planning to renovate your basement? In Ontario, most basement renovations require a building permit — whether you’re finishing a living space, adding bedrooms, upgrading bathrooms, or making structural changes. The Building Permit Guy prepares professional basement renovation permit drawings that meet Ontario Building Code requirements and help you get approved quickly.

When Do You Need a Basement Renovation Permit?

  • Finishing a previously unfinished basement

  • Adding or altering bedrooms or bathrooms

  • Installing or relocating plumbing

  • Lowering a basement floor

  • Making structural changes (beams, load-bearing walls)

  • Adding windows or enlarging window openings

What’s Included

  • Existing & proposed floor plans with full dimensions

  • Locations of bedrooms, bathrooms, storage, or living areas

  • Window and door sizes with egress requirements noted

  • Smoke/CO detector details

  • HVAC and plumbing notes (if layouts are changing)

  • Sections or elevations if required by your municipality

  • Permit-ready drawings designed to Ontario Building Code

Turnaround & Pricing

  • Typically first draft in 5 business days (depending on scope)

  • Pricing based on basement size, complexity, and municipal requirements

  • Transparent, upfront quotes with optional add-ons listed separately

FAQ's

Do I need a permit to finish my basement?
Yes, if you’re adding bedrooms, bathrooms, or altering structure, plumbing, or HVAC. Cosmetic upgrades like flooring or paint don’t require permits.

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What if my basement already has bedrooms without a permit?
We can create as-built drawings and help with a retroactive permit application.

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Do I need an egress window?
Yes, every basement with a bedroom requires a properly sized egress window. We’ll include the details in your drawings.

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Can I add a rental unit in my basement?
That would be considered an Accessory Dwelling Unit (ADU) and follows different rules. We have a separate service for ADUs and secondary suites.

Get Permit Drawings for your Basement Renovation

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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