Ontario · area guide · 10 communities · checked October 8, 2026

Home energy audits, radon and well water testing in Haldimand County

Haldimand County is home to 49,216 people (2021 Census), and 32% of their houses were built before 1961. This guide covers 10 communities, from Caledonia, Dunnville and Hagersville to the smallest hamlets, with the local numbers that shape an energy audit or a home health test.

Energy audits in Haldimand County → All 10 communities
A Victorian red-brick semi-detached house with a front porch in autumn

Population (2021)

49,216

Communities listed

10

Houses built before 1961

32%

Heating degree-days

3,924

Hamilton Airport

How Haldimand County is built

Haldimand County's houses by when they were built Ten house shapes, one for each tenth of Haldimand County's 17,450 houses. Before 1961: 32%, 1961–1990: 36%, 1991–2000: 12%, 2001 or later: 20%. Older houses glow hotter.
  • Before 1961 32%
  • 1961–1990 36%
  • 1991–2000 12%
  • 2001 or later 20%
Each house stands for one in ten of Haldimand County's 17,450 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 (Hamilton Airport) and the National Building Code 2020 January design temperature for Haldimand.

This page covers Haldimand County, a single-tier municipality between Hamilton and Lake Erie.

Great Lakes–St. Lawrence Southern Ontario and southern Quebec

Haldimand County’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 Hamilton need →

Sources for this climate guide · checked October 26, 2026

Six local guides for Haldimand County

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

22 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 −15°C to −17°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

2.6% 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

68% 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

Haldimand County at a glance

People and homes

49,216 people and 20,710 private dwellings in 2021, up 7.9% in population since 2016. On census day (May 11, 2021), 10% of the 20,710 private dwellings in Haldimand County were not anyone's permanent home.

Housing

Of the 17,450 houses in Haldimand County (single-detached, semi-detached, row houses, duplexes and mobile homes), 32% were built before 1961 and 68% before 1991, according to the 2021 Census. The typical house dates from 1971–1980.

Climate

Environment and Climate Change Canada's 1981–2010 climate normal at Hamilton Airport (31.3 km from the middle of the area) is 3,924 heating degree-days a year, with a January mean of −5.5°C. The building code's 2.5% January design temperatures for the area run from −15°C to −17°C.

Radon

In Health Canada’s 2012 survey, 2.6% of 116 homes tested in the Haldimand-Norfolk Health Unit were above the guideline. 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 through Public Health Ontario, with bottles from Grand Erie Public Health weekdays 8:30 a.m. to 4:30 p.m. Drop samples off at Grand Erie Public Health in Caledonia (100 Haddington Street) or Dunnville (117 Forest Street), Monday to Thursday, 8:30 a.m. to 4:30 p.m.

Energy advisors

NRCan's list (checked October 8, 2026) shows 22 service organizations registered for postal codes in Caledonia and Dunnville. 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 Haldimand County

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

  • Haldimand County 49,216Caledonia, Cayuga, Dunnville, Hagersville, Jarvis, Nanticoke, Selkirk, Townsend, York

Who does the work in Haldimand County

Rebates and financing for Haldimand County 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

HamiltonBrantford 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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