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Second unit (basement apartment)

Your drawings must clearly show what is existing and the changes you’re proposing. Drawings must be to scale, and should use metric measurements. We may request additional information when your application is reviewed.

For second units (also known as basement apartments) you’ll need to submit:

The site plan must include the following:

  • Scale (metric only)
  • Direction (North arrow)
  • Municipal address
  • Legal description (lot and plan numbers)
  • Existing buildings and accessory structures labelled “existing”
  • Dimensioned property lines
  • Overall building dimensions
  • Rights-of-way and easements
  • Landscaped areas and hard surfaces such as driveways and walkways

Site statistics

  • Lot area
  • Lot frontage
  • Lot coverage (meters squared and percent)
  • Gross Floor area (total and per floor)
  • Area of second unit

Driveway and walkways

  • Driveway width
  • Driveway surface treatment
  • Dimension of any walkway attachment width to driveway

The floor plan must include the following:

  • Direction (North arrow)
  • Title and scale
  • Use and size of rooms and spaces
  • Interior and exterior dimensions, including door and window sizes
  • Legend indicating which existing walls are to remain, which are to be demolished and which are proposed
  • Structural framing indicating the size, type, grade, spacing, direction of span and location of all structural members (studs, joists, beams, columns, posts and lintels)
  • Location of required smoke alarms and carbon monoxide detectors
  • Location of existing and proposed plumbing fixtures labelled accordingly
  • Floor drains and ventilation provisions
  • Section marks
  • Location of existing and proposed air supply and return grills

Elevations are required for each side of the project. They must include the following information:

  • Title and scale
  • Grade level
  • Existing and proposed work
  • Finished floor levels
  • Exterior wall cladding, finishes and flashing
  • Sizes and location of windows and doors
  • Roof overhang and dimensions
  • Roof shape, slope and finish
  • Rain water leaders and eavestroughs
  • The percentage of glazed areas relative to exposed building face calculations

Sample drawings

Contact us

If you need more information, call 311 (905-615-4311) or contact us online.