Pete Persons Terre Sable & Gravier Inc.
Septic systemsWells and water pumps
Call · 450 263-1574Septic systems in Cowansville
RBQ data dated November 3, 2026: 6 companies active in Cowansville for septic system work. 4 (67%) have held their licence for 10 years or more, the oldest since 1994; none got its licence in the last 90 days.
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Renovation, construction and general workSeptic systems
Call · 450 266-2100Immolux Développement Construction inc.
Renovation, construction and general workNew home buildersSeptic systems
Call · 514 709-9643Maçonnerie Normandin inc.
MasonrySeptic systems
Call · 450 266-9966Excavation St-Pierre et Tremblay inc.
Renovation, construction and general workSeptic systems
Call · 450 266-21009419-7621 Québec inc.
Septic systems
Call · 450 578-4955Ad · Featured placement · examplePreview only — this is not a contractor listing
Your business could appear hereSeptic systems · Cowansville and the cities you serveHomeowners can open your profile and call you directly.
Other cities
Sherbrooke 54Granby 20Magog 9Shefford 7Lac-Brome 7Sainte-Cécile-de-Milton 6Sutton 5Cookshire-Eaton 5Valcourt 4Saint-Claude 4Ascot Corner 4Hatley 4
Other trades in Cowansville
Finding a septic system contractor in Cowansville
Looking for a septic system contractor in Cowansville? 1 of the 6 companies on the list work in this trade only; the others are also listed in other trades: renovation, construction and general work (3), new home builders (1) and masonry (1).
In the Estrie region, 244 companies work in this trade across 72 cities; Cowansville has 6 of them (6th).
The choice is limited in Cowansville. Companies from nearby cities in the region, such as Sherbrooke (54), Granby (20) and Magog (9), may also serve your area: ask them.
The RBQ numbers: septic systems in Cowansville
6companies with an active licence
0new licences in 90 daysnone in the last 30 days
4have held their licence for 10 years or more67% · the oldest since 1994
5have a $40,000 licence bondand 1 at $20,000 · may compensate a client under RBQ rules
- All of them have a published phone number: you can call them directly.
- Most common subcategories: 2.4 On-site wastewater (septic) systems (6), 1.3 Buildings of all kinds (3), 2.2 Non-drilled water catchment works (1), 1.1.1 New residential buildings covered by a guarantee plan, class I (1).
Useful guides: Septic tank pumping: how often and what to check
Open data of the Régie du bâtiment du Québec as of November 3, 2026, updated every night.
Required licence, issuing body and subcategories for this trade: Septic systems in Greater Montréal.
Homes in Cowansville (2021 Census)
6,980households in a private dwelling
52%of dwellings built before 1981including 21% before 1961
50%of households own their home
40%of dwellings are single-detached houses
Source: Statistics Canada, 2021 Census, table 98-10-0233-01 (25% sample, rounded counts), Statistics Canada Open Licence.
Before you sign with a septic system contractor in Cowansville: check the licence on the day, ask for written quotes and avoid large deposits. Printable checklist before you sign →