What building permits needed for home addition

home addition

A building permit for an addition to a small residential building, such as a detached house, semi-detached house, or townhouse.

All drawings to be drawn on standardized sized sheets, drawn to scale, fully dimensioned, signed and dated. If drawings were prepared by a qualified designer (as defined under Div. C, Part 3, Section 3.2 of the Ontario Building Code), drawings must include the designer’s name, registration number, qualification identification number, signature, and stamp/statement that the person has reviewed and taken responsibility for the design activities.

All drawings, reports, and forms, including the completed Application for a Permit to Construct or Demolish, must be provided in a PDF format on a re-writable DVD, USB or submitted by email.Municipal Road Damage Deposit payment and form not required for applications which qualify for the Residential FASTRACK Program.

building home addition

A Building Permit for an interior alteration to a small residential building, such as a detached house, semi-detached house or townhouse.

All drawings to be done on standardized sized sheets, drawn to scale, fully dimensioned, signed and dated.

If drawings were prepared by a qualified designer (as defined under Div. C, Part 3, Section 3.2 of the Ontario Building Code), drawings must include the designer’s name, registration number, qualification identification number, signature, and stamp/statement that the person has reviewed and taken responsibility for the design activities.

All drawings, reports, and forms, including the completed Application for a Permit to Construct or Demolish, must be provided in a PDF format on a re-writable DVD, a USB drive or submitted by email.

Required Documentation

Site Plan

  • Survey or site plan showing property lines, lot area, right-of-way or easements (referenced to a current survey)
  • Location of existing/proposed buildings with overall dimensions and include setback dimensions to property lines and adjacent buildings.
  • Summary of permitted and proposed zoning provisions to include lot area, building area (GFA), coverage, and grade elevations to confirm height.
  • Indicate dimensioned parking areas, driveways, hard & soft landscape treatments, accessory structures (sheds, decks, detached garages, etc).

Floor Plans

  • Fully dimensioned, for each level showing existing & proposed uses of all spaces, including location of smoke alarms & carbon monoxide detectors and all plumbing fixtures.
  • Provide existing/proposed construction with foundation & exterior wall information, showing interior partitions and structural framing above.

Roof Plan
Existing/proposed roof layout showing roof structure, skylights, roof slopes, hips/valleys/peaks and ventilation.

Elevations

  • Exterior finishes with roof slopes, window/door type, locations & sizes including height of sills above floor level.
  • Provide area of exposed building face, percentage/area of unprotected openings and required limiting distance(s).
  • Show exterior decks/landings, stairs, guards/handrails.
  • Provide overall building height dimension.

Sections

  • Cross section(s) to show existing/proposed building construction and specifications of all floor, wall, & roof assemblies.
  • Provide footing & foundation wall details including height of exterior grade above basement floor.
  • Show floor to floor, floor to ceiling and overall building heights.
  • Detail stairs, landings, guards & handrails.

Residential Garages or Accessory Structures

  • Garages or Accessory Structures to be shown on Site Plan, showing the location of all existing and proposed buildings on the lot, setbacks to property lines, distance between proposed structure and other buildings on the lot.
  • Dimensions and locations of all required vehicle parking spaces and the driveway used to access the spaces(s).
  • Floor Plans, Elevations, Sections, Construction Details of the structure, including the details of the concrete floor slab, such as the concrete strength and re-enforcement proposed.

Decks and Verandahs

  • Plans including decks or verandahs must also show the following:
  • Details of footings, including footing size, spacing, depth, height above grade and frost protection details.
  • Sizes and Locations of all Columns; sizes, locations and spans of all beams.
    Stair Construction Details, including height and depth of stair treads and headroom above stairs (where applicable).
  • Guard Construction Details, including information about openings and climbability, and the location of the guards with respect to stairways, landings, and edges of the proposed platform.