Regulations & Rebates
Energy Audit Ontario 2026: What to Expect, Cost, and Rebate Impact
An energy audit is the gateway to Ontario's biggest home upgrade rebates. Here is exactly what happens during an EnerGuide evaluation, what it costs, and how it can unlock $5,000 to $15,000 in federal and provincial incentives.
Key Takeaways
- An EnerGuide evaluation costs $300 to $600 upfront, but up to $600 in assessment incentives through the HRS program can offset most or all of the cost.
- Single HVAC upgrades (like a heat pump) do not require an audit for HRS rebates. The bundle path (multiple upgrades) does.
- The bundle path with an audit can unlock $5,000 to $10,000+ in total rebates, significantly more than single-upgrade rebates.
- Most Ontario homes score 40 to 65 on the EnerGuide scale. Common findings include insufficient attic insulation, air leakage, and aging HVAC equipment.
- Post-audit upgrades typically improve EnerGuide scores by 10 to 25 points and reduce energy bills by 20 to 40%.
What Is an EnerGuide Home Energy Evaluation?
An EnerGuide evaluation is a standardized assessment of your home's energy performance, conducted by a certified energy advisor registered with Natural Resources Canada.[1]It produces a numerical rating (0 to 100) that represents your home's energy efficiency relative to a reference standard.
The evaluation is not just an inspection. It includes diagnostic testing and computer modelling that produces a detailed picture of where your home gains and loses energy. The output is a prioritized list of upgrades ranked by impact and cost-effectiveness.
What Happens During the Evaluation
Here is what to expect during the 2 to 4 hour on-site visit:[1]
1. Visual Inspection
The advisor inspects your home's building envelope: walls, attic, basement or crawlspace, windows, and doors. They check insulation type, depth, and condition in every accessible area. They photograph and document existing conditions.
2. Blower Door Test
This is the most important diagnostic step. A large fan is temporarily mounted in your front door, depressurizing the house. The test measures how many air changes per hour (ACH) your home experiences, quantifying exactly how leaky or tight your building envelope is. The result drives many of the upgrade recommendations.
3. Mechanical Systems Assessment
The advisor documents your furnace, air conditioner, water heater, ventilation system (HRV/ERV if present), and any supplemental heating or cooling. They record model numbers, efficiency ratings, and approximate age.
4. Computer Modelling
All data is entered into HOT2000, NRCan's energy modelling software. The model calculates your EnerGuide rating and simulates the impact of various upgrades. This is what makes the evaluation actionable: you get specific, quantified recommendations rather than generic advice.
What the Audit Typically Finds
Based on typical Ontario housing stock (most homes built between 1960 and 2010), here are the most common findings and their typical impact:
| Finding | Frequency | Typical Cost to Fix | Energy Savings |
|---|---|---|---|
| Insufficient attic insulation | Very common (60-70% of homes) | $1,500-$3,500 | 10-20% |
| Air leakage (envelope) | Very common (80%+ of homes) | $500-$2,000 | 5-15% |
| Aging furnace (below 90% AFUE) | Common (40-50% of homes) | $4,000-$6,500 | 15-20% |
| Uninsulated or under-insulated basement walls | Common (50-60% of homes) | $3,000-$8,000 | 10-15% |
| Old windows (single or double pane, no low-E) | Moderate (30-40% of homes) | $8,000-$20,000+ | 5-15% |
| No ventilation system (no HRV/ERV) | Moderate (30-40% of older homes) | $2,500-$5,000 | Varies (improves air quality) |
Most homes have overlapping issues. The advisor's report prioritizes which upgrades deliver the best return. In many cases, air sealing and attic insulation are the highest-impact, lowest-cost upgrades.[1]
Cost of an Energy Audit
The EnerGuide evaluation involves two visits: a pre-retrofit assessment and a post-retrofit assessment (after you complete upgrades).
| Component | Typical Cost | HRS Incentive | Your Net Cost |
|---|---|---|---|
| Pre-retrofit evaluation | $300-$600 | Up to $200 | $100-$400 |
| Post-retrofit evaluation | $300-$500 | Up to $400 | $0-$100 |
| Total | $600-$1,100 | Up to $600 | $0-$500 |
The HRS program assessment incentives effectively make the audit free or nearly free for homeowners who complete eligible upgrades.[2] Even without the incentive, the audit typically pays for itself many times over through better-targeted upgrades and access to higher rebate tiers.
How the Audit Unlocks Higher Rebates
The HRS program offers two paths:[2]
Single Upgrade Path (No Audit Required)
- Air-source heat pump: up to $7,500 (electric/propane/oil homes) or up to $2,000 (gas homes)
- Insulation upgrades: $250 to $3,600 depending on type
- Smart thermostat: $100
- Heat pump water heater: $500
Bundle Path (Audit Required)
- Combines multiple upgrades under one application with pre/post audit
- Total available: $5,000 (gas homes) or $10,000 (electric/propane/oil homes) through HRS
- Stacks with federal CGHAP for up to $15,000 total in Ontario
- Assessment incentives (up to $600) included on top of upgrade rebates
For homeowners planning multiple upgrades (for example, insulation plus a heat pump plus air sealing), the bundle path with an audit almost always yields more total rebates than applying for each upgrade individually.[2][3]
How to Get an Energy Audit in Ontario
- Find a registered energy advisor: Use the NRCan database to find advisors in your area. In Ontario, several organizations provide EnerGuide evaluations including GreenSaver, Buckthorn Energy, and Clean Air Partnership.[1]
- Book the pre-retrofit assessment: Wait times vary by season. Spring and fall are the busiest. Winter bookings are typically faster (2 to 3 weeks vs. 4 to 8 weeks in peak season).
- Prepare your home: Ensure the advisor can access the attic, basement, mechanical room, and all exterior walls. Clear storage from these areas before the visit. Have your utility bills from the past 12 months available.
- Review your report: The advisor will explain your EnerGuide score and recommended upgrades. Ask about the projected improvement for each upgrade and which combinations qualify for bundle rebates.
- Complete upgrades: Use the prioritized list to plan your upgrade project. Keep all receipts and contractor invoices for rebate applications.
- Book the post-retrofit assessment: Once upgrades are complete, the advisor returns to verify the work and measure your new EnerGuide score. This triggers the bundle path rebates and the post-assessment incentive.
Is an Energy Audit Worth It?
For a homeowner planning a single upgrade (just a furnace or just a heat pump), the audit is not required and adds cost without unlocking additional rebates. Go the single upgrade path.
For a homeowner planning two or more upgrades, the audit is almost always worth it. The combination of higher bundle rebates, assessment incentives, and better-targeted upgrades typically delivers 3x to 5x return on the audit cost.[2]
For a homeowner curious about their home's energy performance but not ready to commit to upgrades, the audit provides valuable information. But consider waiting until you are ready to act, so you can take advantage of the HRS assessment incentives and the 18-month window to complete upgrades.
Frequently Asked Questions
How much does an energy audit cost in Ontario?
An EnerGuide home energy evaluation in Ontario costs $300 to $600 for the initial assessment and $300 to $500 for the follow-up post-retrofit evaluation. The HRS program offers up to $600 in assessment incentives ($200 for the pre-assessment and up to $400 for the post-assessment), which can offset most or all of the cost.
Do I need an energy audit to get HVAC rebates in Ontario?
It depends on the rebate path. Under the HRS program, single upgrades like a heat pump do not require an energy audit. However, the bundle path (combining multiple upgrades for higher rebates) requires both a pre-retrofit and post-retrofit EnerGuide evaluation. The bundle path can unlock $5,000 to $10,000 or more in total rebates.
What does an energy audit actually involve?
A certified energy advisor visits your home for 2 to 4 hours. They inspect insulation levels, air sealing, windows, doors, mechanical systems (furnace, AC, water heater), and ventilation. They perform a blower door test to measure air leakage. You receive a detailed report with your EnerGuide rating (0 to 100 scale) and prioritized upgrade recommendations.
What is a good EnerGuide rating?
The EnerGuide rating scale runs from 0 to 100. Most existing Ontario homes score between 40 and 65. A score of 70 or higher is considered good. New homes built to current Ontario Building Code typically score 75 to 82. Net-zero homes target 100. Each point improvement represents roughly 3 to 5% less energy consumption.
How long does an energy audit take?
The on-site evaluation takes 2 to 4 hours, depending on home size and complexity. You will receive your detailed report within 1 to 3 weeks. The entire process from booking to receiving your report is typically 2 to 6 weeks, depending on demand in your area.
- Natural Resources Canada EnerGuide Home Evaluations
- Save on Energy / Enbridge Gas Home Renovation Savings Program
- Natural Resources Canada Canada Greener Homes Affordability Program
- Enbridge Gas Home Efficiency Rebate Plus