Permit for balconies, decks, patios and terraces

The information contained in this page is simplified and for information purposes only. In case of a contradiction between the by-law and this document, the former will prevail.

A permit is required to install or modify a balcony, deck, patio, terrace, gazebo, or pergola.


  • A balcony is a platform that projects out from the face of a building either overhanging or supported by columns.
  • A deck is an exterior platform located at the rear of a building supported by columns that is no more than 0.6m (2′) above the ground.
  • A patio is a paved surface located at the rear of a building on the ground intended for exterior use.
  • A terrace is a raised level space of earth or crushed stone adjoining the rear wall of a building.
  • A gazebo is a free-standing structure with a roof and open or partially enclosed sides.
  • A pergola is a small garden structure with an
    open-framework roof supported by columns.


  • Balconies and decks must be located at least 3.05m (10′) from the rear property line and 2m (6’6″) from the side property line except in the case of semi-detached dwellings where they must sit at least 0.6m (2′) from the common property line.
  • Patios must be located at least 0.91m (3′) from the rear and side property lines.
  • Terraces must be located at least 4.57m (15′) from the side property lines and 6.1m (20′) from the rear property line.
  • Additionally, no combination of balcony, deck, patio or terrace may exceed 50 percent of the rear yard area.
  • One gazebo or pergola is permitted on a property on which the main building is located. If erected on the ground or a patio, the structure must be at least 0.91m (3′) from any property line. If located on a deck or balcony it must be at least 3.05m (10′) from the rear property line and 2m (6’6″) from the side property line.


  • Balconies that are more than 1.8m (5’11”) above the ground are required to have a guardrail at least 1.07m (3’6″) high.
  • Balconies lower than 1.8m (5’11”) from the ground are required to have a guardrail at least 0.9m (3′) high.

Protect your renovation investment by hiring a contractor licensed by the Régie du bâtiment du Québec (RBQ).

How to apply for a permit

  • An up-to-date certificate of location for the property to the Urban Planning Department indicating the proposed balcony, deck, patio, terrace gazebo, or pergola is required.
  • Complete an online or a PDF application form (see below).
  • Pay applicable fees. See Fee schedule guide for a detailed price list.
  • Permits should be issued within five to ten business days, depending on the volume of permits being processed and the complexity of application.

It is the responsibility of the owner to obtain required permits. If you require more information or clarification, please contact the Urban Planning Department at 514-485-6800 or [email protected].