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Drainage in Mirabel: what we see on the ground
Mirabel is huge: farmland, sandy areas and brand-new neighbourhoods going up every year. From one sector to the next, the soil is completely different.
In Mirabel's sandy areas, a dry well can work very well, which is rare in the region. On the more clay-rich land, it is the opposite. A percolation test settles the question before you spend anything.
Signs it is time to act
- Puddles that take more than 24 hours to disappear.
- A damp basement, a seeping wall, a musty smell or white powder on the concrete.
- Spongy lawn, or grass that always yellows in the same spot.
- Ice building up in the same corner every winter.
What we do, from cheapest to biggest
- Downspouts: extend them, disconnect them from the foundation drain and send the water at least one metre from the house. Often that is all it takes.
- Grade: the Code requires a 2% minimum, the APCHQ recommends about 10% over the first six feet around the foundation. We top up and recompact where the backfill has settled.
- Surface drain or swale: to intercept water coming from the neighbour or the back of the yard.
- French drain: trench down to the footing, clean stone, 4 inch perforated pipe, geotextile and a real outlet.
- Dry well: only if the percolation test allows it.
- Sump, pump and backwater valve: when there is no gravity outlet or the sewer can back up.
Rénoclimat: up to $38,500 against flooding
Since October 1, 2026, Québec helps owners protect their homes: a pump with battery backup, a backwater valve and, in a recognized flood zone, major work covered up to 75%. Golden rule: start nothing before the assessment. Altitude Services is not affiliated with the government and does not guarantee the grant.
How it works
- You text us photos at 514 775-1988, or request a callback below. Often we can already tell you whether it is worth a visit.
- Jonathan comes to your place in Mirabel, looks at the yard with you and sends a written quote, normally within 24 hours.
- We do the work with our own machinery, ground protection mats, and leave you a clean yard. Work guaranteed 1 year in writing.
Our drainage work is guaranteed in writing
If the water comes back, so do we. It is written in the quote, not just said. $2,000,000 liability insurance.
Frequently asked in Mirabel
Do you really travel to Mirabel?
Yes. Our base is in Sainte-Dorothée (Laval), about 25 minutes from Mirabel. We go regularly and group our jobs by area to keep travel costs low.
Does a dry well work in Mirabel?
It depends on your lot's soil, not the town. On clay, a well with no outlet fills up and never empties. On sand, it can work very well. We run a percolation test before recommending one, never after.
How much does a French drain cost?
It depends on the length, the depth, the soil and where the water can exit. Two neighbouring lots can need very different work. We come over, take a look and give you a firm written price. The visit is free.
Do I need a permit from the City of Mirabel?
For a drain or grade correction on your own property, usually not. A connection to the storm sewer or a municipal ditch, or work in the street right-of-way, may require one. We tell you in the quote, before we start.
Our other services in Mirabel
- Excavation and grading in Mirabel
- Pavers in Mirabel
- Site preparation with the Harley Rake
- Online estimator
Drainage in nearby towns
We also serve: Blainville, Boisbriand, Sainte-Thérèse, Rosemère, Lorraine, Bois-des-Filion. See every town in Greater Montreal.