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Permits and certificates

Renovations - Construction - Outbuildings, Tool and Garden Sheds

A permit must be obtained to build or set up an outbuilding that is separate from the main building; moreover, certain basic rules must be met.

A residential outbuilding must not cover a surface area of more than 12 m2 and the height must not exceed 3 m in the case of a flat roof and 4 m with a sloped roof—that is, the equivalent of a tool or garden shed. Only one such structure is permitted per dwelling.

Rules

  • No outbuilding may be installed in a front yard.
  • In the case of a corner lot, you must inquire at the Direction de l’aménagement urbain et des services aux entreprises to ensure that the project complies with the by-law. 
  • The total area of the main building and its authorized outbuildings may not exceed the limits set by the land development ratio indicated in the zoning plan. 
  • Provide for a margin of safety to ensure that drainage remains within the property lines. 
  • Exterior materials must be easy to maintain. Such materials must have been designed as exterior surfaces. Wood may be used, provided that it is painted or varnished. 
  • A shed may be installed on a balcony only if that balcony is in the side or back yard. Such a structure may not be more than 1 m in depth and the width must be equal to that of the balcony. 

In the L'Île-des-Soeurs neighbourhood, a shed is authorized provided that the following conditions have been met:

  • Maximum area of six square metres (6 m²)
  • Maximum height over mean ground level for a sloped roof is four metres (4 m). 
  • Maximum height over mean ground level for a flat roof is three metres (3 m). 
  • The exterior covering must be heavy masonry identical to the main building. 
  • Roofing material must be identical to the one used on the main building.

For more details

Direction de l’aménagement urbain et des services aux entreprises
4555, rue de Verdun, Suite 109
Office Hours
514 765-7083

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