When selling a property in Montreal on the Island or in the city and Westmount adjacent, the Quebec Federation of Real Estate Boards census results show that the presence of a garage increases the average value of a home between 8 and 11 percent depending on the area. Also another interesting fact from their results is that a second garage adds as much as 25 percent to the value of the home. As well, a second parking space adds 14 percent vs one parking space adds 11 percent. Contact me for results of other major cities in Quebec vis-a-vis the added value of a garage.