Foundations, French drains, roofs, balconies and renovations: for owners of houses and plexes, a single contractor who coordinates the work and gives you a written quote.
or call (514) 654-9184
Owners of houses and plexes
Water infiltration, cracked foundations, an extension or a renovation: we assess on site, we put in writing what is included and excluded, and nothing changes without your written approval.
Construction AIM is a general contractor based in Anjou. We work in Montreal, on the North Shore, including Laval, and on the South Shore, in houses as well as duplexes, triplexes and other plexes, often while the units stay occupied. Every project starts with a site visit and, when the situation calls for it, relies on the structural engineer's report or plans.
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A damp basement, a widening crack or an extension project quickly raise the same questions: what is the cause, what work is needed and how do you avoid bad surprises?
Signs of moisture, efflorescence (a whitish deposit on the concrete), a musty smell or water at the base of the walls: the French drain may be clogged or missing, or the foundation is no longer watertight.
A crack that lets water in, a sunken column or a sloping floor is worrying, and rightly so. Before repairing, the cause has to be found.
Extensions, added storeys, structural work: requirements vary by borough or municipality, and the documents requested are not always obvious.
You want to know exactly what the quote covers and how unexpected issues will be handled, for example a crack found after excavation.
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Each service has its own detailed page: click its name to learn more.
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A few terms you often hear when you own a house or a plex in Montreal.
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We work for owners of houses and plexes in Montreal, on the North Shore, including Laval, and on the South Shore.
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Our prices are based on the current wage rates of the Commission de la construction du Québec (CCQ), set by the collective agreements for the sector concerned (residential, institutional and commercial, industrial), plus the materials and equipment specific to each job. Every quote is free, detailed and prepared after a site visit.
Not always for a non-structural crack. To replace a column or a load-bearing wall, underpin a foundation or build an extension, a report or plans signed and sealed by an engineer who is a member of the Ordre des ingénieurs du Québec (OIQ) are generally required. We then carry out the work according to the engineer's recommendations.
For exterior waterproofing, occupants generally stay at home, since most of the work is done around the building. Structural work in the basement or an extension may require freeing up some rooms during certain phases. We discuss it at the first visit.
No. In Montreal, By-law 20-030 requires downspouts to discharge onto a permeable surface, at least 1.5 m from the foundation. A downspout that empties at the base of the wall, or that is connected to the drain, adds water around the basement and overloads the drainage. Source: City of Montreal.
Conditions that cannot be seen during the visit (contaminated, frozen or waterlogged soil, rock, unstable old foundations) are not included. If one of them comes up, we present the solution and its cost to you in writing, and we wait for your approval before continuing.
Yes. We plan the work with you and your tenants: notices given in advance, closed and protected work areas, access to the units maintained. In Quebec, the owner must notify tenants before major work in their unit; we help you prepare the schedule for that notice.
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Our guides for homeowners.
Next step
Describe the work in the form below and attach a few photos. We will schedule a visit, then give you a detailed written quote.
Describe my projectPage updated October 17, 2026.
Describe your project in a few minutes. We schedule a site visit, then give you a written quote that spells out the work included, the exclusions, the conditions and the schedule.
All fields are required except attachments. Photos help us prepare the visit.
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