Quebec · 16 local services · checked September 28, 2026

Home energy audits and home testing in Longueuil

Longueuil gets about 4,275 heating degree-days a year, 21% of its houses were built before 1961, and 4 NRCan-licensed service organizations list its postal codes. Pick a service for the local details.

Energy audits in Longueuil → All 16 services
A brick Montréal plex with exterior spiral staircases in winter

How Longueuil is built

Longueuil's houses by when they were built Ten house shapes, one for each tenth of Longueuil's 52,710 houses. Before 1961: 21%, 1961–1990: 55%, 1991–2000: 9%, 2001 or later: 16%. Older houses glow hotter.
  • Before 1961 21%
  • 1961–1990 55%
  • 1991–2000 9%
  • 2001 or later 16%
Each house stands for one in ten of Longueuil's 52,710 houses (single-detached, semi-detached, row and duplex), drawn by when it was built. The glow shows the usual pattern: older houses tend to be leakier and less insulated. Snowfall scales with heating degree-days. Sources: Statistics Canada 2021 Census (table 98-10-0233-01), NRCan HOT2000 climate data.

Longueuil at a glance

Climate

Longueuil gets about 4,275 heating degree-days a year and has a winter design temperature of −23.2°C, according to NRCan's HOT2000 climate data for Montréal-St-Hubert.

Housing

Of Longueuil's 52,710 houses (single-detached, semi-detached, row houses and duplexes), 21% were built before 1961 and 76% before 1991, according to the 2021 Census. The typical house dates from 1971–1980.

Heating

In the Montréal area, 54% of households heat mainly with electric baseboards, 15% with a heat pump, 10% with a forced-air furnace and 6% with a boiler and radiators; electricity is the main heating energy for 71% of households, natural gas for 5% and oil for about 2% (Statistics Canada, 2023).

Radon

Health Canada's 2012 survey found 8.9% of 112 homes tested in the Région de la Montérégie health region above the guideline. The larger 2024 Cross-Canada survey reports 17.4% (1 in 6) of houses at or above the guideline for Montréal Metro Area (Montréal CMA).

Local service guides for Longueuil

Energy audits and tests

An energy advisor’s kit on a front-hall bench: infrared camera, pressure gauge with tubing, tape measure, headlamp and a floor sketch

Home energy audit

4 licensed organizations
A red blower-door panel with a large fan fitted into the front doorway of a brick bungalow, a pressure gauge on a stool inside

Blower door test

4,275 degree-days
Hands holding an infrared camera aimed at a ceiling corner beside a frosty window; the screen shows a cold streak

Thermal imaging inspection

4,275 degree-days
A kitchen table with a house floor plan, a laser measure, a tape measure and a laptop showing the plan

Heat loss calculation

Design temp −23.2°C
A duct-testing fan on a basement floor connected by flexible duct to a furnace, a pressure gauge hanging from a joist

Duct leakage testing

10% forced-air
A gloved hand inserting a combustion analyzer probe into a furnace flue pipe in a basement

Combustion safety test

5% heat with gas
A heat recovery ventilator on a basement wall with four insulated ducts running up between the joists

Ventilation and humidity assessment

16% built since 2001
Loose-fill insulation between attic joists, a yellow ruler showing its depth and frost on the roofing nails above

Attic insulation inspection

76% built before 1991
Utility bills and a phone showing a monthly energy-use chart on a kitchen table

Energy bill analysis

Hydro-Québec

Home health tests

A small digital radon monitor on a bookshelf in a finished basement family room

Radon testing

17.4% at or above guideline (2024)
A carbon monoxide alarm on an upstairs hallway wall outside the bedrooms at night

Carbon monoxide testing

Not required (recommended)
A moisture meter pressed into water-stained basement drywall, an air-sampling pump on a tripod nearby

Mold and air quality testing

76% built before 1991
A gloved hand holding a sealed sample bag above vermiculite insulation between attic joists

Asbestos and vermiculite testing

76% built before 1991
A gloved hand swabbing layers of cracked old paint on a wooden window sill

Lead paint testing

21% built before 1961
Filling a water-sample bottle at a farmhouse kitchen tap with the aerator removed, snowy fields and a barn outside

Well water testing

Wells rare

For businesses and buildings

An auditor walking between rooftop heating and cooling units on a snowy commercial roof

Commercial energy audit

4 incentive programs

Who does energy evaluations in Longueuil

In Quebec, EnerGuide evaluations for existing homes run through the provincial Rénoclimat program; the organizations below are the ones NRCan lists for Longueuil postal codes.

4 NRCan-licensed service organizations list Longueuil postal codes. See the list with phone numbers and coverage →

Rebates and financing for Longueuil homes

Provincial · needs an evaluation Rénoclimat (Quebec) Quebec's audit-linked path: an assigned evaluator for $150 + tax (refunded except the tax when you receive assistance), then rebates for insulation, air sealing, doors and windows Open Provincial Hydro-Québec LogisVert Heat pump grants scaled to capacity — $50–$120 per 1,000 BTU/h — plus appliances and solar, no audit needed Open Federal CMHC Eco Improvement premium refund 25% back on your CMHC mortgage insurance premium after $20,000 of energy renovations Open Federal Canada Greener Homes Affordability Program Free retrofits for low-to-median-income households in BC, Manitoba, Nova Scotia, PEI and Quebec — not available in Ontario Open · deadline

Cities near Longueuil

Montréal14 kmLaval23 kmSaint-Jean-sur-Richelieu26 kmTerrebonne28 kmTrois-Rivières115 kmSherbrooke120 km All 70 cities →

Sources

Checked September 28, 2026.

Planning upgrades in Longueuil?

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