How Guelph is built
- Before 1961 20%
- 1961–1990 34%
- 1991–2000 15%
- 2001 or later 32%
What an evaluation finds in Guelph homes
Of Guelph's 42,250 houses (single-detached, semi-detached, row houses and duplexes), 20% were built before 1961 and 54% before 1991, according to the 2021 Census. The typical Guelph house dates from 1981–1990, and an evaluation is how you find out what that means for yours: the blower door measures air leakage, the advisor inspects the attic, walls, basement, windows and heating system, and the report ranks upgrades by what they'd save.
Guelph gets about 4,331 heating degree-days a year and has a winter design temperature of −20.3°C, according to NRCan's HOT2000 climate data for Mount Forest, the closest comparable location in that data set (64 km away). That's about 10% more heating demand than the middle of the 70 cities we cover. The more heating a climate needs, the more each fix is worth, which is why the evaluation's ranked list matters more in some cities than others.
In the Guelph area, 61% of households heat mainly with a forced-air furnace; natural gas is the main heating energy for 56% of households (Statistics Canada, 2023). The heating system on the report shapes the recommendations: a forced-air furnace invites a ducted heat pump, electric baseboards a ductless one.
What it costs in Guelph
Typical Ontario prices are about $500–$700 for the initial EnerGuide evaluation and $200–$450 for the follow-up, plus HST where it applies. Windfall Ecology Centre charges $500 + HST for the initial evaluation and $250 + HST for the follow-up, Reep Green Solutions charges $540 and $406 with no HST, and City-backed programs in Ottawa and London quote $500–$700 as typical for the first visit. Only assessments from the seven HRSP-approved organizations qualify for the $600 Home Renovation Savings rebate, and none of the seven publishes a price.
Most providers quote the initial (pre-upgrade) and follow-up (post-upgrade) visits separately. Rebate programs that pay on measured improvement need both, so ask for the combined price.
How it works
- Initial evaluation, about 2–3 hours. The advisor measures and inspects the house and runs the blower door test.
- Report and EnerGuide rating. You get the home's energy rating in gigajoules per year and a list of recommended upgrades with estimated savings.
- Do the work. Most rebate programs only count upgrades done after the initial evaluation.
- Follow-up evaluation. A second visit measures the improvement, which is what most rebates pay on.
NRCan-licensed service organizations serving Guelph
Every organization below is licensed by NRCan to deliver EnerGuide evaluations and lists Guelph postal codes. Coverage is the share of Guelph's urban postal areas each one lists.
Only assessments from the seven HRSP-approved organizations qualify for the $600 Home Renovation Savings rebate and its assessment-path upgrade rebates; each listing below says whether it's one of them.
- Acacia Engineering HRSP-approved: No
- All Season Inspection HRSP-approved: No Profile
- AmeriSpec HRSP-approved: Yes Profile
- BEST Energy and Sustainability HRSP-approved: No
- Capital Home Energy HRSP-approved: No
- Clean Energy Solutions HRSP-approved: No
- Ecostep Energy Services HRSP-approved: No
- EnerQuality HRSP-approved: No
- EnerSolution HRSP-approved: No Profile
- EnviroCentre HRSP-approved: No
- ER Energy Solutions HRSP-approved: No
- GETS Energy HRSP-approved: No
- Green Canada Home Advisors HRSP-approved: No Profile
- Green Think HRSP-approved: No
- Greenbrain HRSP-approved: Yes Profile
- Isle Energy Consulting HRSP-approved: No
- MAP Energy HRSP-approved: No
- Reep Green Solutions HRSP-approved: No Non-profit network Profile
- Sensible Home Inspections HRSP-approved: No
- The Energuy HRSP-approved: Yes Profile
- Verdatech Energy Management and Consulting HRSP-approved: No
- CoEfficient Building Science HRSP-approved: No
Rebates and financing an evaluation unlocks in Guelph
Home energy audit in Guelph: common questions
How much does a home energy audit cost in Guelph?
Typical Ontario prices are about $500–$700 for the initial EnerGuide evaluation and $200–$450 for the follow-up, plus HST where it applies. Windfall Ecology Centre charges $500 + HST for the initial evaluation and $250 + HST for the follow-up, Reep Green Solutions charges $540 and $406 with no HST, and City-backed programs in Ottawa and London quote $500–$700 as typical for the first visit. Only assessments from the seven HRSP-approved organizations qualify for the $600 Home Renovation Savings rebate, and none of the seven publishes a price.
How many companies do EnerGuide evaluations in Guelph?
NRCan's list of service organizations shows 25 licensed organizations with Guelph postal codes (checked September 25, 2026). Six of the seven organizations approved for Home Renovation Savings assessments are among them, and only those seven qualify for its $600 rebate.
How long does an EnerGuide evaluation take?
The initial visit usually takes two to three hours, including the blower door test. The follow-up visit after upgrades is shorter.
Which rebates need an EnerGuide evaluation in Ontario?
Currently: Home Renovation Savings — Home Energy Assessment path (Up to $10,000 per home for insulation, windows and air sealing, plus $600 back on your assessments — if the follow-up assessment is done by December 31, 2026). Check the program page for current terms before you book.