Ontario · area guide · 9 communities · checked October 8, 2026

Home energy audits, radon and well water testing in Caledon

Caledon is home to 76,581 people (2021 Census), and 10% of their houses were built before 1961. This guide covers 9 communities, from Bolton, Caledon East, Caledon Village and Palgrave to the smallest hamlets, with the local numbers that shape an energy audit or a home health test.

Energy audits in Caledon → All 9 communities
A Victorian red-brick semi-detached house with a front porch in autumn

Population (2021)

76,581

Communities listed

9

Houses built before 1961

10%

Heating degree-days

4,421

Orangeville MOE

How Caledon is built

Caledon's houses by when they were built Ten house shapes, one for each tenth of Caledon's 22,940 houses. Before 1961: 10%, 1961–1990: 32%, 1991–2000: 21%, 2001 or later: 36%. Older houses glow hotter.
  • Before 1961 10%
  • 1961–1990 32%
  • 1991–2000 21%
  • 2001 or later 36%
Each house stands for one in ten of Caledon's 22,940 houses (single-detached, semi-detached, row, duplex and mobile homes), drawn by when it was built. The glow shows the usual pattern: older houses tend to be leakier and less insulated. More snow in the drawing means more heating degree-days: a longer, colder heating season. Sources: Statistics Canada 2021 Census (table 98-10-0233-01), Environment and Climate Change Canada 1981–2010 climate normals (Orangeville MOE) and the National Building Code 2020 January design temperature for Brampton.

This page covers the Town of Caledon, the rural northern part of the Region of Peel, including Bolton, Caledon East, Caledon Village, Palgrave and the hamlets around them. Brampton and Mississauga have their own pages.

Great Lakes–St. Lawrence Southern Ontario and southern Quebec

Caledon’s climate: Great Lakes–St. Lawrence

Cold winters and hot, humid summers: seal the attic, dry the basement, plan cooling.

This region has real winters and hot, humid summers, so bills come from both heating and cooling. Natural gas heats most Ontario homes, while most Quebec homes use low-cost electricity. An EnerGuide evaluation here should cover air sealing and the attic, cooling and dehumidification, and keeping the basement dry before insulating it.

  1. Seal air leaks and top up the attic

    Air sealing is still the first retrofit. In the snowier Ottawa–Montreal–Sherbrooke belt, a leaky, under-insulated attic also causes ice dams.

  2. Right-size cooling to control humidity

    In humid summers, an oversized air conditioner or heat pump cools quickly but shuts off before removing moisture, leaving rooms clammy. A heat pump replacing the air conditioner also covers much of the heating.

  3. Keep the basement dry before insulating

    Basements can be about 20% of heat loss, but insulating a damp basement from the inside can rot the new wall. Flash floods have hit Toronto and Montreal repeatedly.

When to book: Book the evaluation in winter (December to February) for clear thermal scans, and start a 3-month radon test in fall. Check the basement after spring thaw or heavy rain, and line up cooling work before summer.

Everything homes in Brampton need →

Sources for this climate guide · checked October 26, 2026

Six local guides for Caledon

Energy audits and heat pump sizing

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 audits

25 registered organizations
A kitchen table with a house floor plan, a laser measure, a tape measure and a laptop showing the plan

Heat loss calculations

Design temp −19°C to −21°C

Home health and safety

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

Radon testing and long-term monitoring

0% above guideline (2012)
A moisture meter pressed into water-stained basement drywall, an air-sampling pump on a tripod nearby

Mould and indoor air quality testing

43% built before 1991
Filling a water-sample bottle at a farmhouse kitchen tap with the aerator removed, snowy fields and a barn outside

Well water testing

Free bacteria tests
A Victorian red-brick semi-detached house with a front porch in autumn

Wood-burning appliance inspections (WETT)

Chimney inspection every 12 months

Caledon at a glance

People and homes

76,581 people and 24,795 private dwellings in 2021, up 15.2% in population since 2016.

Housing

Of the 22,940 houses in Caledon (single-detached, semi-detached, row houses, duplexes and mobile homes), 10% were built before 1961 and 43% before 1991, according to the 2021 Census. The typical house dates from 1991–1995.

Climate

Environment and Climate Change Canada's 1981–2010 climate normal at Orangeville MOE (15.6 km from the middle of the area) is 4,421 heating degree-days a year, with a January mean of −7.5°C. The building code's 2.5% January design temperatures for the area run from −19°C to −21°C.

Radon

In Health Canada’s 2012 survey, none of the 89 homes tested in the Peel Regional Health Unit were above the guideline, a small sample that doesn't rule radon out. The larger 2024 Cross-Canada survey reports 12.4% (1 in 8) of homes at or above the guideline for Ontario as a whole.

Wells

Free bacteria testing (E. coli and total coliforms) through the provincial Public Health Ontario program. Peel's well pages cover construction, maintenance and abandonment but give no testing locations; get bottles through Public Health Ontario, which says to contact your public health unit for a kit.

Energy advisors

NRCan's list (checked October 8, 2026) shows 25 service organizations registered for postal codes in Bolton, Caledon and Caledon Village. Confirm they travel to your community.

Heating

Province-wide, 58% of Ontario households heat mainly with natural gas, 18% with electricity, 4% with propane and 1% each with oil and wood (Statistics Canada, 2023); there's no published breakdown for this area alone.

Every community in Caledon

Grouped by municipality, with 2021 Census populations. Names come from Natural Resources Canada's geographical names database and Statistics Canada's population centres.

  • Town of Caledon 76,581Alton, Belfountain, Bolton, Caledon East, Caledon Village, Cheltenham, Inglewood, Palgrave

Covered on city pages

  • Brampton 656,480Brampton has its own pages.

Who does the work in Caledon

Rebates and financing for Caledon homes

Provincial · needs an evaluation Home Renovation Savings — Home Energy Assessment path Up to $10,000 per home ($5,000 if heated with Enbridge gas), including $600 back on your two assessments, for insulation, windows, air sealing and more — if the follow-up assessment is done by December 31, 2026 Open · deadline Provincial Home Renovation Savings — direct rebates (no assessment) Heat pumps up to $7,500 ($12,000 ground-source), solar with battery up to $10,000, plus attic, thermostat and appliance rebates — no assessment needed Open Federal National Heat Pump Rebate Announced October 8, 2026 and opening early 2027: up to $10,000 below the median income, $2,000 for other eligible homeowners Announced · opens 2027 Federal CMHC Eco Improvement premium refund A 25% energy-efficiency rebate on your CMHC mortgage insurance premium after $20,000 of energy renovations Open

Nearby city pages and guides

BramptonVaughan Brampton advisor directory What a home energy audit involvesThe CSA F280 heat-loss calculationThe radon testing guideThe mould and indoor air quality guideThe well water guideThe wood-burning inspection guide All area guides →

Sources

Checked October 8, 2026.

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