Are the flood zones near the Rivière des Prairies a concern?

Yes, significantly. Sections of Ahuntsic-Cartierville near the Rivière des Prairies are designated flood zones. The 2017 and 2019 floods demonstrated the vulnerability of these properties. Our inspection checks for evidence of past flooding, the condition of protective systems (sump pump, backwater valve, protective barriers) and signs of water-related deterioration.

Are the 1950s-1970s bungalows in Ahuntsic in good condition?

These bungalows are between 55 and 75 years old and present challenges typical of their era: 100-amp electrical panels that may be insufficient for modern needs, vermiculite insulation in attics, original windows due for replacement, asphalt shingle roofs often on their second or third layer, and aging copper plumbing. An inspection evaluates their actual condition and helps plan necessary upgrades.

Building Inspection

Building Inspector in
Ahuntsic-Cartierville

A large family-oriented borough in northern Montreal, Ahuntsic-Cartierville features a mix of 1950s-1970s bungalows and older neighbourhoods near the Rivière des Prairies. Flood zones, pyrite risk and aging systems are at the heart of inspection concerns here.

Housing Profile

Ahuntsic: Montreal's family-friendly
north end.

Ahuntsic-Cartierville is one of Montreal's largest boroughs by area. Its residential development occurred in several waves: older neighbourhoods near Sault-au-Récollet and the Rivière des Prairies (1930s-1950s), a vast expansion of bungalows and cottages during the 1950s-1970s, and more recent projects including condos and townhouses.

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Family Bungalows (1950-1970)

The vast majority of properties in Ahuntsic are bungalows, cottages and split-levels built during this period. Poured concrete or block foundations, asphalt shingle roofs, 100-amp electrical panels and vermiculite insulation are typical characteristics of these homes.

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Older Riverfront Neighbourhoods

Areas near the Rivière des Prairies and Boulevard Gouin feature older properties from the 1930s-1950s, including stone houses and brick duplexes. These neighbourhoods are also the most exposed to flooding risk.

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1980s-1990s Construction

Some sections of Cartierville were developed in the 1980s-1990s. These homes, while more recent, may be affected by pyrite in the backfill beneath the basement concrete slab — a costly problem many buyers overlook.

Soil & Foundations

The river, pyrite
and the foundations.

Ahuntsic-Cartierville presents varied geology: clay soil in the southern areas, alluvial zones near the Rivière des Prairies, and potentially pyritic backfill in 1980s-1990s developments. This geological diversity creates a range of foundation challenges that demand inspection tailored to each specific neighbourhood.

✓ Rivière des Prairies flood zones — Properties along Boulevard Gouin and near the river sit in designated flood zones. The major floods of 2017 and 2019 impacted many residences in this area.

✓ Pyrite risk — Homes built in the 1980s-1990s may have pyritic backfill beneath the basement slab. Pyrite oxidation causes swelling and cracking of the slab, a problem that often costs over $50,000 to correct.

✓ Concrete block foundations — Bungalows from the 1950s-1970s often have concrete block foundations, which are more permeable than poured concrete. The joints between blocks are weak points for water infiltration.

✓ Unstable alluvial soil — Near the river, alluvial soil is less stable and can cause foundation settlement. Waterfront properties require special attention to signs of structural movement.

Common Findings

What we find
in Ahuntsic.

Our inspections in Ahuntsic-Cartierville cover a range of residential types, each with its own challenges tied to the era of construction and location.

✓ Signs of pyrite in the slab — Star-pattern cracks, basement slab heaving, white powder (sulfates) and uneven floors are indicators of pyrite in the backfill. A laboratory test can confirm the diagnosis.

✓ 1960s electrical panels — Many bungalows still have 100-amp panels with original breakers, insufficient for modern electrical needs. Certain Federal Pioneer or Stab-Lok branded panels may present safety risks.

✓ Evidence of past flooding — Riverfront properties may show signs of water exposure: waterline marks on foundation walls, replaced basement floors, new materials on the lower portions of walls.

✓ Aging roofs — Asphalt shingles on 1960s-1970s bungalows are often at end-of-life or have been layered over without removing old courses, compromising attic ventilation.

✓ Vermiculite in attics — Vermiculite insulation, potentially contaminated with asbestos, is widespread in construction from this era in Ahuntsic. Its presence requires professional assessment before any renovation project.

✓ Original windows and doors — Windows from the 1960s-1970s often have failed sealant joints, condensation between panes and thermally inefficient aluminum frames.

Neighbourhoods Served

Ahuntsic,
in detail.

We inspect properties throughout the borough, including:

Ahuntsic

Family bungalows and cottages, tree-lined residential streets, borough core

Sault-au-Récollet

Historic riverfront area, older homes, proximity to Rivière des Prairies

Cartierville

1980s-1990s developments, townhouses and condos, pyrite risk

Bordeaux-Cartierville

Mixed residential area, duplexes and triplexes, near Highway 15

Our Services

Inspections available in
Ahuntsic.

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Pre-Purchase Inspection

FAQ

Questions about
Ahuntsic.

Is pyrite a risk in Ahuntsic-Cartierville?+

Yes. Homes from the 1980s-1990s may have pyritic backfill beneath the basement slab. This mineral oxidizes and swells, causing cracks and heaving. We look for telltale signs: star-pattern cracks, heaving and white powder. A laboratory test can confirm the diagnosis.

Are the flood zones near the river a concern?+

Yes, significantly. The 2017 and 2019 floods demonstrated the vulnerability of these properties. We check for evidence of past flooding, the condition of protective systems (sump pump, backwater valve) and signs of water-related deterioration.

Are the 1950s-1970s bungalows in good shape?+

These bungalows are 55 to 75 years old and present typical challenges: sometimes insufficient electrical panels, vermiculite in attics, original windows due for replacement, aging roofs and copper plumbing with lead solder joints. An inspection evaluates their actual condition.

Neighbouring Areas