What Are Permit Drawings? Site Plans, Elevations and Structural Details

Permit drawings are scaled technical documents that communicate your construction project to the City of Toronto Building Department. They show where you're building on your property, what the structure looks like from every angle, how rooms are laid out inside, and how the building will be structurally sound. The city uses these drawings to verify your project meets the Ontario Building Code, local zoning bylaws, and safety requirements. Every building permit application in Toronto requires a set of permit drawings, and the specific drawings you need depend on your project type.

The Core Components of a Permit Drawing Set

A complete permit drawing package typically contains several interconnected documents. Each drawing type serves a specific purpose in demonstrating code compliance. Missing or incomplete drawings are the most common reason Toronto building permit applications get returned for revisions. Here's what each drawing type does and why the city requires it.

Site Plans

A site plan shows your property from above, like a bird's eye view. It indicates your lot boundaries, existing structures, the proposed construction, setbacks from property lines, and how the new work relates to neighbouring properties. Toronto zoning examiners use site plans to verify your project respects required setbacks, lot coverage limits, and landscaping requirements. Your site plan must include accurate measurements, typically based on a legal survey of your property.

Floor Plans

Floor plans show the horizontal layout of each level of your project. They indicate room dimensions, door and window locations, stairways, plumbing fixtures, and how spaces connect. For basement apartments, floor plans must show bedroom egress windows, ceiling heights, and separate entrances. The city reviews floor plans to confirm rooms meet minimum size requirements and that the layout provides safe egress in emergencies.

Elevations

Elevations are vertical views of your building from each side, typically north, south, east, and west. They show exterior finishes, window and door placements, roof slopes, and overall building height. In neighbourhoods like The Annex or Rosedale with heritage considerations, elevations help planners assess visual compatibility with surrounding homes. Elevations also demonstrate compliance with maximum height restrictions under your property's zoning.

Structural Drawings and Details

Structural drawings show how your building will stand up. They include foundation plans, beam and column layouts, floor framing, and roof structure. Structural details zoom in on specific connections, like how a deck ledger attaches to your house or how a steel beam transfers load to a column. In Toronto, structural drawings for most projects must be stamped by a licensed Professional Engineer. The city's structural plan examiners review these drawings to ensure your building can handle snow loads, wind forces, and the weight of occupants and furnishings.

Which Drawings Your Project Actually Needs

Not every project requires every drawing type. A simple interior renovation might need only floor plans and a site plan, while a new laneway suite requires the full package plus additional documentation for servicing and access. Here's a general breakdown by project type.

• Basement apartment: Site plan, floor plans, elevations, window well details, HVAC layout, and often structural drawings if you're underpinning or adding egress windows
• Deck over 2 feet high or over 100 square feet: Site plan, deck plan with dimensions, structural details for footings and framing, and guard rail details
• Second storey addition: Full site plan, floor plans for all affected levels, all four elevations, roof plan, and complete structural drawings stamped by an engineer
• Laneway suite: Comprehensive package including site plan with parking, all floor plans, elevations, structural drawings, grading plan, and servicing details
• Interior renovation with structural changes: Floor plans, structural drawings for any wall removals or beam installations, and sometimes mechanical drawings

What Makes Permit Drawings Different from Design Sketches

Homeowners sometimes confuse design sketches or concept drawings with permit drawings. They're not the same thing. Design sketches show ideas and aesthetics. Permit drawings are legal documents that must meet specific technical standards. The City of Toronto requires permit drawings to include precise measurements, be drawn to a consistent scale, show compliance with code requirements, and include a title block with project information.

Permit drawings must also be prepared or reviewed by qualified professionals. In Ontario, architectural drawings for houses can be prepared by a licensed architect, a building designer with BCIN qualification, or in some cases by the homeowner. Structural drawings almost always require a Professional Engineer's stamp. Submitting sketches instead of proper permit drawings will result in your application being rejected at intake.

How Toronto Reviews Your Permit Drawings

When you submit permit drawings to the City of Toronto, they go through multiple review streams. Zoning examiners check your site plan and elevations against the zoning bylaw for your property. Structural plan examiners review your structural drawings for OBC compliance. Building code examiners check floor plans for fire safety, egress, room sizes, and accessibility where applicable. If your project involves plumbing or HVAC changes, those drawings get separate reviews too.

Each examiner can issue comments requesting revisions. Common revision requests include adding missing dimensions, clarifying structural connections, demonstrating fire separation between units, or correcting setback measurements. The quality of your initial submission directly affects how many revision rounds you'll face. At PermitsHub, we've found that thorough, accurate drawings can cut review time significantly compared to rushed or incomplete submissions.

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The difference between a two-month permit timeline and a six-month one often comes down to the quality of the original drawing submission.

Common Mistakes That Get Permit Drawings Rejected

Certain errors appear repeatedly in rejected Toronto permit applications. Avoiding these mistakes will save you weeks of delays and revision fees.

• Missing or incorrect property dimensions, often because the applicant guessed instead of using survey data
• Structural drawings without an engineer's stamp when one is required
• Floor plans that don't match elevations, showing windows in different locations
• Setback measurements that don't account for existing non-conforming conditions
• Missing fire separation details for basement apartments or secondary suites
• Ceiling heights shown incorrectly, especially in basements where underpinning is needed
• Drawings not to scale or with inconsistent scales across sheets

Preparing for Your Permit Drawing Package

Before you commission permit drawings, gather key information that your designer or architect will need. This preparation prevents delays and reduces revision requests later.

Start with a current survey of your property. If you don't have one, order a new survey from an Ontario Land Surveyor. Your designer needs accurate lot dimensions, existing building locations, and elevation data. Next, confirm your property's zoning designation using the City of Toronto's online zoning map. Different zones have different rules for setbacks, height, and lot coverage. If you're in a heritage conservation district or near a ravine, additional requirements apply.

For renovation projects, have your existing floor plans ready if available. Original architectural drawings from when your house was built can save significant time. If you don't have them, your designer will need to measure and document existing conditions before drawing proposed changes. Finally, be clear about your project scope. Changes to scope mid-drawing can mean starting over on certain sheets.

Working with Permit Drawing Professionals

You have several options for getting permit drawings prepared. Licensed architects offer full design services but are typically the most expensive option. Building designers with BCIN qualifications can prepare most residential permit drawings at lower cost. Some homeowners attempt their own drawings, which is technically permitted for simple projects but often results in multiple revision rounds. Firms like PermitsHub specialize in permit drawings specifically, combining design capability with deep knowledge of what Toronto examiners look for.

When evaluating who should prepare your drawings, ask about their experience with your specific project type and with Toronto's permit process. A designer who primarily works in Mississauga or Brampton may not know Toronto's specific zoning quirks or examiner preferences. Request examples of similar projects they've completed and ask how many revision rounds those projects required.