What Is an EnerGuide Rating?
The EnerGuide rating system for houses was developed by Natural Resources Canada and has been in use in its current form since 1997, with significant updates to the scoring methodology in 2020. The rating quantifies a home's annual energy consumption on a scale from 0 to 100, where:
- 0 represents a home that uses an extremely high amount of energy and has essentially no thermal performance
- 100 represents a net-zero energy ready home — one that produces as much energy as it consumes on an annual basis under reference conditions
- 61–65 is roughly where most existing Canadian housing stock falls when assessed under the 2020 rating methodology
The score is not calculated from actual utility bills. It is generated by HOT2000 energy modelling software using standardized occupant assumptions, reference climate data from the nearest weather station, and physical characteristics of the building measured during the audit. This standardization is essential: it allows scores to be compared between homes in different cities with different climates, and it removes the effect of individual behaviour (a family that keeps their thermostat at 21°C and a family that keeps it at 18°C will show the same EnerGuide score for the same house).
How the 2020 Rating Methodology Differs from Earlier Versions
Before 2020, EnerGuide scores were expressed as gigajoules per year of energy consumption — a lower number was better. The 2020 update reversed this so that higher numbers are better, aligning the Canadian system more closely with international conventions and making the label more intuitive for homeowners. If you have an older audit report from before 2020, the scores are not directly comparable to newer ones without conversion.
The 2020 methodology also introduced separate reference conditions that account for climate zone differences more precisely, and updated the HOT2000 reference occupancy model to reflect current Canadian household patterns. As a result, many homeowners who had their homes audited under the older system and then re-audited after 2020 saw apparent changes in their score that do not correspond to actual changes in the house.
Reading the EnerGuide Label
The EnerGuide label produced after a residential audit contains several pieces of information beyond the headline score:
- Current EnerGuide score: The score calculated from the as-found conditions on audit day
- Potential EnerGuide score: The score achievable if all recommended upgrades are implemented
- Annual energy consumption: Expressed in gigajoules per year under reference conditions
- Greenhouse gas emissions: Expressed in equivalent tonnes of CO₂ per year, reflecting fuel type
- EnerGuide rating date: Critical for grant applications, as programs have submission windows
The gap between the current score and the potential score is the most actionable number on the label. A house currently scoring 62 with a potential of 78 has a pathway to significant improvement; a house scoring 62 with a potential of 66 has already captured most of its available efficiency gains.
The EnerGuide label must carry the name and registration number of the certified energy advisor who conducted the assessment. Labels without this information are not valid for grant applications.
The Canada Greener Homes Grant
The Canada Greener Homes Grant, administered by Natural Resources Canada, is the primary federal funding mechanism for residential efficiency upgrades. As of 2026, the program provides grants of up to $5,600 per home for eligible retrofits, with the amount determined by which measures are installed and what performance thresholds they meet. A separate Canada Greener Homes Loan provides up to $40,000 at 0% interest for deeper retrofits, repayable over ten years.
Eligibility requirements for the grant:
- The home must be a primary residence in Canada
- A pre-retrofit EnerGuide audit must be conducted by a registered energy advisor before any work begins
- All retrofit work must be completed by a licensed contractor (specific licencing requirements vary by province)
- A post-retrofit EnerGuide audit must be conducted after all work is complete
- Grants are claimed through the NRCan portal after the post-retrofit audit is submitted
Eligible Measures and Grant Amounts
The grant amounts below reflect the program as structured for the 2025–2026 fiscal period. Grant values and eligible measures are subject to annual revision.
| Measure | Maximum Grant | Key Requirement |
|---|---|---|
| Air sealing | $1,000 | Minimum 15% ACH50 reduction confirmed by post-audit |
| Attic / ceiling insulation | $3,500 | Achieve minimum RSI improvement by zone |
| Foundation / crawlspace insulation | $5,000 | Minimum RSI thresholds by zone |
| Exterior wall insulation | $5,000 | Minimum RSI thresholds by zone |
| Windows and doors (ENERGY STAR Most Efficient) | $5,000 | $250 per unit, qualified products only |
| Space and water heating (heat pump) | $5,000 | Must meet CAN/CSA-C746 performance levels |
| HRV / ERV | $1,000 | Must meet CSA F326 installation standards |
| Resiliency measures (solar, battery) | $600 | Grid-tied or off-grid eligible configurations |
Provincial and Territorial Grant Programs
Several provinces and territories operate parallel or complementary programs that stack with the federal grant. The degree of stacking permitted varies by program and is reviewed annually.
British Columbia
BC Hydro and FortisBC both offer rebates for heat pump and insulation upgrades through the CleanBC Better Homes program. Heat pump rebates range from $3,000 to $11,000 depending on the type and performance tier. The Province of BC also operates an interest-free loan program for low-income homeowners through BC Hydro's On-Bill Financing.
Ontario
Ontario's Home Efficiency Rebate Plus (HER+) program, delivered through Enbridge Gas, provides rebates for natural gas customers undertaking insulation, air sealing, and HVAC upgrades. The program is not available to all-electric homes. Toronto and other larger municipalities occasionally operate supplemental programs; residents are advised to check directly with their local utility.
Quebec
Hydro-Québec's Rénoclimat program is Quebec's provincial equivalent of the EnerGuide audit system and provides rebates for certified energy improvements. Rebate amounts are calculated based on the percentage improvement in energy use intensity relative to the pre-retrofit benchmark. Quebec also provides grants specifically for converting oil heating to heat pumps under the Chauffez vert program, with grants of up to $3,000 per household.
Nova Scotia
Efficiency Nova Scotia operates one of the most comprehensive provincial programs in Canada, including the Home Energy Assessment program (which subsidizes audit costs for low-income residents), the EfficiencyOne rebate programs for insulation and heat pumps, and a targeted program for households converting from oil heating. Nova Scotia's high dependence on oil heat makes heat pump adoption particularly financially attractive, with payback periods often under five years at current oil prices.
What a One-Point Score Improvement Actually Means
The EnerGuide scale is not linear, so the energy reduction represented by a one-point improvement differs across the scale. At the lower end (scores 40–60), each point corresponds to a larger absolute reduction in gigajoules per year than at the upper end (scores 70–85). As a rough orientation for homes in Climate Zone 6:
- Moving from EnerGuide 55 to 65 typically represents a reduction of approximately 40–60 GJ/year in heating energy
- Moving from EnerGuide 65 to 75 represents a reduction of approximately 25–40 GJ/year
- Reaching EnerGuide 80 or above usually requires a combination of deep envelope work, heat pump installation, and solar photovoltaic generation
In monetary terms, a reduction of 40 GJ/year in natural gas use at current Toronto rates (approximately $18–22/GJ) translates to $720–$880 per year in avoided fuel costs. For households heating with oil, which costs roughly $40–50/GJ at current prices, the same reduction is worth $1,600–$2,000 annually.
How to Apply for the Canada Greener Homes Grant
The application process has four stages:
- Register: Create an account on the NRCan Greener Homes portal before any work begins. Registration locks in your eligibility date.
- Pre-retrofit audit: Book a registered energy advisor for the EnerGuide assessment. The pre-retrofit label is submitted to NRCan as part of your application.
- Complete upgrades: Have eligible work completed by licensed contractors within 18 months of the pre-retrofit audit date.
- Post-retrofit audit and claim: The energy advisor returns to measure and confirm improvements. The post-retrofit label and receipts for completed work are submitted through the portal. Grant payments typically process within 8–12 weeks of a complete submission.
Applications with incomplete documentation — missing contractor invoices, unregistered energy advisors, or work completed before registration — are frequently rejected. The NRCan support line at 1-833-674-3347 handles program-specific questions and can clarify documentation requirements before submission.
The Canada Greener Homes Grant has periodic funding windows. When annual grant allocations are exhausted, the program enters a waitlist phase. Registering early in the fiscal year improves the likelihood of receiving grant funding within your project timeline.
Low-Income Homeowner Considerations
Several provinces operate separate, more generous programs for households below specific income thresholds, recognizing that upfront retrofit costs are a barrier for households that stand to benefit most from reduced energy bills. The Canada Greener Homes Affordability program, introduced in 2023 and expanded in 2025, provides free energy audits and covers a higher percentage of upgrade costs for households with incomes below $75,000. Eligible homeowners should inquire specifically about this stream when contacting NRCan or a registered energy advisor, as it operates on separate intake cycles from the standard grant program.
Keeping Records After a Retrofit
The EnerGuide label and supporting documentation have ongoing value beyond the initial grant claim. Homeowners who sell their property can use the post-retrofit label to demonstrate measurable energy performance to prospective buyers — an increasingly relevant factor as energy costs rise and mortgage lenders begin incorporating energy efficiency into property valuations. Some Canadian mortgage lenders, including several major chartered banks, now offer preferential rates on "green mortgages" for homes with EnerGuide scores above a specified threshold. Maintaining a file with the pre- and post-retrofit labels, contractor invoices, and product specifications ensures this documentation is available when needed.