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What Projects Require a Building Permit?

Under the Ontario Building Code Act, a building permit is required to construct, demolish, renovate, alter, install or change the use of a building.  The following is a list of typical projects or situations that require the issuance of a building permit prior to construction:

  • Construct a new building greater than 10 sq.m. in building area (the area of the building's footprint)

  • Install new plumbing in a building or part thereof

  • Change the use and/or occupancy of a building

  • Changing the fuel source of a fireplace from gas-fired to solid burning (wood)

  • Construct an addition to an existing building

  • Construct a deck*

  • Add or remove a structural wall in a dwelling

  • Complete a roughed-in bathroom or washroom

  • Alter an existing building or it's plumbing system

  • Repair a building or it's plumbing system

  • Repair or install a sewage system (commonly referred to as a 'septic system')

  • Install a new furnace utilizing a new fuel source, i.e. Electrical to natural gas

  • Install a solid fuel burning appliance, i.e. Wood burning stove or masonry fireplace

  • Complete a roughed-in fireplace

  • Detached or attached garages and carports

  • Solariums

  • Addition of a dormer

  • Raising a dwelling to provide a full basement

  • Sunrooms

  • Install a sign

  • Pool enclosure around a swimming pool

*Decks in the rear yard, not attached to the dwelling and less than 10 sq.m. (108 sq.ft.) in area, do not require a building permit. Decks larger than 10 sq.m. (108 sq. ft.) and all decks more that 600 mm (2' - 0") above average grade do require a building permit.

If the above list does not include specifics of your project or you are not sure if a permit will be required, please contact our Permit Administrator at 905-833-4078 with the details of the work.

What Projects Do Not Require a Building Permit?

It is not necessary to obtain building permits to perform the work listed below.  Please note, however, you must still comply with the requirements of the King Township Zoning By-law and if applicable, the Ontario Building Code.

  • Erect a fence, other than a pool enclosure fence. Compliance with the Township’s Fence By-law is required.  Please Note: Building permits are required to erect a pool enclosure fence in accordance with the ​Fence and Swimming Pool Enclosure By-law 2012-132.

  • Sidewalks

  • Planters and landscaping

  • Damp-proofing basements

  • Replacement plumbing fixtures

  • Replacement hot water heaters (note the requirement to limit hot water to 49°C after September 2004)

  • Kitchen or bathroom cupboards

  • Painting, decorating and general maintenance

  • Replacing roof shingles on a residential dwelling

  • Air conditioning units or heat pumps added to existing systems

  • Replacement furnaces provided the new and old furnaces have similar heat output and use the same fuel

  • Accessory buildings (storage sheds) not greater than 10 sq.m. (108 sq. ft.) in area. Compliance with the Township's Zoning By-law for property line setbacks is required. Visit Plans Examination for more information.

  • Decks in the rear yard, not attached to the dwelling and less than 10 sq.m. in area. Please Note: Decks larger than 10 sq.m. and all decks attached to a dwelling and more than 600 mm (2'-0") above grade do require a building permit.

If the above list does not include specifics of your project or you are not sure if a permit will be required, please contact our Permit Administrator at 905-833-4078 with the details of your work.