Montréal says tourist rentals must follow municipal bylaws and Québec’s Tourist Accommodation Act. The City’s guidance describes a seasonal route for part or all of a principal residence: in most boroughs, short stays may be allowed from June 10 through September 10 with a host permit. The page identifies Lachine, Saint-Laurent, and Saint-Léonard as boroughs where this use is prohibited. Because the rule depends on borough and the current permit regime, the citywide summary is not enough to establish permission for an address.
The City treats a dwelling that is not the operator’s principal residence differently. Stays of 31 days or less are available only in certain areas and require a certificate of occupancy. For rentals longer than 31 days, the City directs users to Québec’s housing tribunal process. These are different legal pathways; a permit for one does not establish eligibility for another.
Check the dwelling and the borough
Identify the borough and confirm that the unit is legally established as a dwelling. Check current zoning, the host permit or certificate, the period and duration of the planned stay, and any borough-specific restriction. An ADU’s separate legal status and permission for tourist accommodation are distinct questions.
Review tenancy, tax, insurance, condominium, and private-covenant requirements separately. The City’s page does not decide whether a particular ADU is a lawful dwelling, a principal residence, or eligible for a tourist-rental certificate. Confirm the current rules and property status before advertising or hosting.