Porches and Decks
Do I Need a Building Permit?
A Building Permit is required for a deck or porch that is:
attached to the principal dwelling
used with a swimming pool
A deck or porch is an exterior structure that may or may not be attached to a building, with or without a roof, and may include guards (railings) as required by the Ontario Building Code.
Generally, a Building Permit is required for a deck or porch that is attached to the principal dwelling or used in conjunction with an on-ground or above-ground swimming pool. A Building Permit may NOT be required if a deck is located in a rear yard and is not attached to the principal dwelling and does not exceed 10 square metres (108 square feet) in area and is less than 24” above grade.
Note: In cases where a Building Permit is not required, all porches and decks must still meet Zoning By-law requirements and all other applicable regulations.
Apply for a Building Permit
When building a deck or porch, you will need to complete:
You will also need to submit:
- A Site Plan that shows your existing house and the size and location of the proposed porch or deck. The Site Plan must also include:
- Title, scale, north arrow, and property dimensions
- Street name and municipal address number
- Setbacks to all property lines for the existing dwelling and the proposed deck or porch
- Any right-of-ways and/or easements
- Location and size of all accessory buildings, garages, sheds and pools including hot tubs
- Front yard landscaping, such as a driveway or sidewalks (if applicable)
- Detailed construction drawings indicating:
- Size/dimensions of proposed porch/deck in relation to existing structure, height from grade to top of slab, decking, railing and/or roof where applicable
- Construction of stairs, guards and handrails; include stair width, stringer size, rise, run, guard spacing, height, materials and attachment details
- Roof framing (if applicable): include materials, size, grade and spacing of rafters, showing support details at all bearing points
- Footing, foundation or pier construction details; include size, space, depth and compressive strength of concrete
- For wood frame deck construction: indicate size, grade, direction, spacing and span of joists and beams. View sample wood frame deck drawing
- For concrete porch construction: indicate concrete compressive strength; thickness of slab; size and spacing of any rebar present, and means of support. View sample concrete porch drawing
- Building Permit Fee
To ensure your application is complete refer to the: