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Uncovered Residential Wood Decks

Unless there are other specific requirements (ie:  Conservation Authority, site specific zoning, Greenbelt restrictions, etc), the following information shall apply to the construction of all uncovered residential wood decks:

A Building Permit is required for all decks which are more than 600 mm (2 ft.) above adjacent average grade and are attached to a building;

A Building Permit is required for all decks which are more than 600 mm (2 ft.) above average adjacent grade and are greater than 10 m² (107.64 sq.ft.) in area;

All footings are to be located on undisturbed soil, minimum 1.2m (4 ft) below finished grade. Both foundation and deck structure shall be designed in accordance with Division B Part 9 of the Ontario Building Code.

City of Mississauga Zoning By-law 225-2007, as amended:

  (Article 4.1.5.1)  A porch or deck, located at and accessible from the first storey of the dwelling, inclusive of stairs, may encroach a maximum of 1.6 m into a required front and/or exterior side yard;

→  (Article 4.1.5.2)  A porch or deck, located at and accessible from the first storey of the dwelling, inclusive of stairs, may encroach a maximum of 5.0 m into a required rear yard provided that the porch or deck shall have a minimum setback of 1.5 m to the rear lot line.  For a lot with a dwelling requiring a 0.0 m interior side yard, the setback to that interior side lot line from a porch or deck, inclusive of stairs, shall also be 0.0 m.  For a lot with a dwelling requiring more than a 0.0 m interior side yard, the setback to the interior side lot line from a porch or a deck, inclusive of stairs, shall be 0.61 m; *

*Applies to a porch or deck located in the rear yard only.

  (Article 4.1.5.7)  Any portion of a porch or deck that is located in a rear yard, does not exceed 0.3 m in height above grade at any point and is uncovered, is permitted an unlimited encroachment into the required rear yard;

  (Article 4.1.5.11)  A freestanding deck may be located in a rear yard provided that it does not exceed    1.2 m in height above grade at any point, is uncovered and is not closer than 0.61 m to any side lot line and 1.5 m to any rear lot line.

  (Article 4.1.2.3)  Decks and/or balconies are not permitted on top, above or projecting from any part of an accessory building or structure;

Questions concerning the above information should be directed to the Building Division through our Call Centre at 3-1-1; if calling from outside of Mississauga, please dial 905 615-4311. Questions may also be e mailed to eplanbuild.info@mississauga.ca

   Printable Links:
♦  General Information for Open Wood Decks  PDF
♦  Sample Construction Detail Sheet:  Decks and Porches  PDF

 






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