Les Constructions Mario Maurais Inc.
Renovation, construction and general workHeating, ventilation and air conditioningWood stoves and fireplaces
Call · 450 589-9775L’Assomption has 258 licensed companies; years licensed in L’Assomption: 20 or more 52, 10 to 19 63, under 10 143.

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Renovation, construction and general workHeating, ventilation and air conditioningWood stoves and fireplaces
Call · 450 589-9775Septic systemsWells and water pumps
Call · 514 952-7965Electricians
Call · 450 589-9279Renovation, construction and general workConcrete and foundationsAccessibility lifts
Call · 450 589-8100Renovation, construction and general workMasonry
Call · 514 212-1448Renovation, construction and general workNew home builders
Call · 514 816-7664Heating, ventilation and air conditioningWood stoves and fireplacesConcrete and foundationsSeptic systemsWells and water pumps
Call · 450 589-6226Specialty contractors
Call · 514 554-0075Specialty contractors
Call · 514 647-6368Specialty contractors
Call · 450 705-1500Specialty contractors
Call · 450 589-9994Renovation, construction and general workHeating, ventilation and air conditioningWood stoves and fireplacesSeptic systemsWells and water pumps
Call · 514 705-5529Renovation, construction and general work
Call · 450 589-4936Renovation, construction and general workHeating, ventilation and air conditioningWood stoves and fireplaces
Call · 450 589-0832Renovation, construction and general workPlumbersHeating, ventilation and air conditioningWood stoves and fireplaces
Call · 450 585-9004Specialty contractors
Call · 514 838-6491Septic systemsWells and water pumps
Call · 450 589-3825PaintersSpecialty contractors
Call · 514 651-6661Specialty contractors
Call · 514 248-5829Septic systemsWells and water pumps
Call · 450 657-0346Specialty contractors
Call · 450 589-7178Renovation, construction and general work
Call · 514 714-9513Specialty contractors
Call · 514 293-6317Specialty contractors
Call · 450 588-0299Renovation, construction and general workHeating, ventilation and air conditioningWood stoves and fireplaces
Call · 514 594-2229Specialty contractors
Call · 450 589-5068Doors and windowsSpecialty contractors
Call · 450 591-1402Specialty contractors
Call · 514 463-9630Renovation, construction and general workNew home builders
Call · 450 589-0290Electricians
Call · 450 588-4964Renovation, construction and general work
Call · 450 582-7012Renovation, construction and general workMasonry
Call · 514 990-5301Doors and windows
Call · 450 589-3477Heating, ventilation and air conditioning
Call · 450 654-6329Plumbers
Call · 514 645-4158Specialty contractors
Call · 450 589-3026Specialty contractors
Call · 450 589-3643Heating, ventilation and air conditioning
Call · 450 713-0810L’Assomption, 258 licensed companies — under 5 years (81), 5 to 9 years (62), 10 to 19 years (63), 20 years or more (52). Median in L’Assomption: 2017. Longest licensed in L’Assomption: Plomberie M.J. inc. (1984), 9468-3430 Québec inc. (1984) and Jean Raynault Inc. (1984). Newest: Auberge au Sommet des Vents inc. (September 23, 2026) and Madero Construction inc. (September 22, 2026). L’Assomption, licences per year: 2022 (18), 2023 (14), 2024 (18), 2025 (19), 2026 (11).
L’Assomption, trades: renovation (102), specialty (85), heating (36), stoves (24), septic (17), electrical (17), wells (16), plumbing (15), masonry (11), new homes (11), foundations (10), roofing (7). Subcategories in L’Assomption: any building (91), small buildings (80), framing (38), home ventilation (25), wood heating (24), electrical (17). Bonds in L’Assomption: 115 at $40,000, 143 at $20,000. 56 have another name.
2,410 renter and 6,795 owner households in L’Assomption; single-detached houses 60%. Periods in L’Assomption: before 1961 11%, 1961-1980 21%, 1981-2000 27%, after 2000 41%. 36 dwellings per company in L’Assomption (Montréal 162).
First licences in L’Assomption, by decade: 1980s (13), 1990s (17), 2000s (35), 2010s (86), 2020s (107). 20 years or more: 20% of licences in L’Assomption, 15% in Montréal. L’Assomption: 28 contractors per 1,000 dwellings; town average 17.6, highest Mirabel (32.4), lowest Pointe-Claire (8). Region of L’Assomption: Lanaudière, 5,107 licensed companies in all.
L’Assomption rank: 13th of 26 towns, between Boucherville (264) and Châteauguay (246). Close to L’Assomption: Repentigny (549), Mascouche (520) and Terrebonne (1,151).
One public construction tender is open in L’Assomption, according to SEAO and CanadaBuys as of November 3:
The tenders board · only the official notice counts.
According to the City of L’Assomption, any project to build, enlarge, renovate or alter a building needs a building permit. Work on an existing building whose cost (labour and materials) is $3,000 or less before taxes does not need one, as long as it does not affect the foundations, the structure or the interior partitions, does not increase the floor area, does not affect any fire-protection element, and does not involve adding or closing off a window or replacing the exterior cladding. Some sectors and types of work are subject to a PIIA (architectural integration plan), authorized by city council after a recommendation from the planning advisory committee. You can apply for a permit online.
Official pages: Permits and certificates (in French) ↗ · Printable checklist before you sign
Masonry — 11 licence holders in L’Assomption, 9 with “mason” or “brick” in their name.
Concrete and foundations — 10 companies in L’Assomption; the oldest licence dates from 1984.
Wood stoves and fireplaces — In L’Assomption, 24 companies, the oldest licensed since 1984.
New home builders — 11 companies in L’Assomption, 7 of them with “construction” or “builder” in the name.
Septic systems — In L’Assomption, 17 companies, the oldest licensed since 1984.
Wells and water pumps — 16 licence holders in L’Assomption, the first licence in 1984.