Green Mortgage Programs and Energy-Efficient Home Financing in Canada
CMHC's Eco Plus program returns 25% of the mortgage insurance premium on homes that meet or exceed an EnerGuide rating of 83 (or equivalent), making it the most direct and underutilized green incentive in the Canadian mortgage stack. For refinancing homeowners, the mechanics layer across OSFI B-20 stress-test constraints, an 80% LTV ceiling on refinances, and a separate federal retrofit grant landscape — each with distinct eligibility windows and documentation requirements that must be sequenced correctly to capture the full benefit.
Who this is for
Salaried homeowners with existing equity who are refinancing to fund energy upgrades or purchasing an energy-efficient home and want to understand how green programs interact with standard mortgage underwriting.
- Refinanced mortgage amount
- $500,000
- Standard CMHC premium (75.01–80% LTV tier)
- $12,000 (2.40% of $500k)
- Eco Plus rebate (25% of premium)
- $3,000 returned post-close
- Net effective premium cost
- $9,000
- Stress-test qualifying rate
- 7.10% (contract rate + 200 bps floor)
Framework
CMHC Eco Plus — mechanics and eligibility
Eco Plus is a premium refund, not a rate discount. The borrower pays the standard CMHC insurance premium at close, then applies post-close for a 25% rebate once an eligible energy evaluation confirms the home meets the threshold. The current threshold is EnerGuide 83 or higher for existing homes, or a Step 3 or higher rating under the National Building Code's tiered energy code for new construction. The evaluation must be conducted by a Natural Resources Canada–registered energy advisor, and the EnerGuide label must be dated within 24 months of the mortgage close. CMHC processes the rebate directly to the borrower — it does not reduce the insured loan balance. The program applies to both purchase and refinance transactions where CMHC default insurance is in place.
Refinance constraints under B-20 and CMHC rules
Refinancing to fund energy upgrades runs into two hard ceilings. First, OSFI Guideline B-20 caps refinances at 80% LTV for federally regulated lenders — there is no exception for green purposes. Second, CMHC insured refinances are also capped at 80% LTV (unlike purchases, which can go to 95%). This means a homeowner with a $650,000 property can access a maximum of $520,000 in total mortgage debt through a refinance. The stress test applies at the higher of the contract rate plus 200 bps or 5.25% — at current 5-year fixed rates of roughly 5.10–5.30%, the qualifying rate lands near 7.10–7.30%. Borrowers who cannot qualify at that rate for the full retrofit amount may need to sequence the work across two draw periods or supplement with a HELOC tranche.
Federal retrofit grants and how they interact with mortgage draws
The Canada Greener Homes Grant program closed to new applicants in 2024, but the Canada Greener Homes Loan (interest-free, up to $40,000 over 10 years) remained available through Natural Resources Canada into 2025–2026 for eligible retrofits. This loan is unsecured and does not appear on title, but lenders will count the repayment obligation in TDS ratio calculations. Sequencing matters: complete the pre-retrofit EnerGuide evaluation before drawing mortgage funds, because the baseline rating is required for both the Eco Plus rebate and the federal loan application. Attempting to reconstruct a pre-retrofit baseline after work is complete is not accepted by NRCan-registered advisors.
Alternative lender and credit union green products
Several credit unions and Schedule I banks have introduced proprietary green mortgage products — typically a 10–25 bps rate discount on the mortgage rate for homes with an EnerGuide rating above a threshold (commonly 80–86, varying by lender). Vancity's Bright Ideas mortgage and Desjardins' green mortgage are the most established examples. These are conventional products, not CMHC-insured, and the rate discount is applied at origination rather than as a post-close rebate. For borrowers with 20%+ equity who want to avoid the insurance premium entirely, a conventional green product from a credit union may produce a lower all-in cost than the CMHC Eco Plus route — the break-even depends on the premium amount, the rate differential, and the amortization remaining.
EnerGuide evaluation — cost, timing, and lender documentation
An EnerGuide evaluation costs approximately $400–$600 in most provinces, conducted by a NRCan-registered energy advisor. Two evaluations are required for the Eco Plus rebate: one pre-retrofit (establishing baseline) and one post-retrofit (confirming the upgraded rating). Total advisor cost is typically $800–$1,200. Lenders do not require the post-retrofit evaluation at mortgage close — the Eco Plus rebate application is filed separately with CMHC after the work is complete and the second evaluation is done. Borrowers should budget 3–6 months between mortgage close and rebate receipt. The EnerGuide label number and the advisor's registration number must appear on the CMHC rebate application.
Provincial programs layered on top
Several provinces run parallel incentives that stack with CMHC Eco Plus. Ontario's Home Efficiency Rebate Plus (HER+) offers up to $10,000 in rebates for heat pump and insulation upgrades. BC's CleanBC Better Homes program provides rebates up to $16,000 for fuel-switching retrofits. Alberta's Greener Homes program mirrors the federal structure with provincial top-ups. These are grant programs, not mortgage products, and do not affect LTV calculations. However, lenders may ask for documentation of expected grant proceeds if the borrower is relying on them to fund a portion of the retrofit — treat them as conditional income until the cheque clears.
Key considerations
- The Eco Plus rebate is paid to the borrower after close, not credited at close — cash-flow the retrofit costs assuming the rebate arrives 3–6 months post-completion, not at funding.
- CMHC Eco Plus requires the mortgage to be insured, which means the refinanced amount must exceed 80% LTV or the borrower must have originally purchased with insurance and is refinancing within the insured envelope. Borrowers with substantial equity who refinance below 80% LTV are not eligible unless they voluntarily insure, which is not permitted on refinances under current CMHC rules.
- The Canada Greener Homes Loan repayment obligation (up to $40,000 over 10 years) will be captured in TDS calculations by most lenders — confirm with your lender how they treat this before stacking it with a large refinance draw.
- Provincial rebate programs have annual funding caps and close mid-year when exhausted. Apply to provincial programs immediately after the post-retrofit evaluation, not after waiting for the CMHC rebate.
- If the property is a rental or investment property, CMHC Eco Plus eligibility is restricted — the program is designed for owner-occupied residential properties. Confirm occupancy requirements with CMHC before structuring the transaction.
Common mistakes
- Completing the retrofit before getting the pre-retrofit EnerGuide evaluation — without a documented baseline rating, neither the CMHC Eco Plus rebate nor the federal Greener Homes Loan application can proceed, and the borrower forfeits both incentives.
- Assuming the Eco Plus rebate reduces the insured loan balance — it does not. The premium is added to the mortgage at close; the rebate is a separate cash payment. Borrowers who budget as though the rebate offsets the premium at funding will be short at close.
- Refinancing to exactly 80% LTV without confirming the appraisal — if the appraisal comes in below the purchase price estimate, the LTV breaches 80% and the transaction may require restructuring or a larger equity contribution.
- Stacking the federal Greener Homes Loan on top of a maximum-draw refinance without stress-testing the combined TDS — the loan repayment can push TDS above the 44% ceiling and trigger a qualification failure.
- Selecting a lender based on rate alone without confirming they accept EnerGuide documentation for Eco Plus processing — not all lenders have the administrative workflow to facilitate the CMHC rebate application, and the borrower ends up managing it entirely without lender support.
Action steps
- 01Book a pre-retrofit EnerGuide evaluation with a NRCan-registered energy advisor before drawing any mortgage funds — this evaluation is the foundation of every green incentive in the stack.
- 02Calculate your post-refinance LTV precisely using a current appraisal, not an estimated value. Confirm you are at or below 80% LTV and that CMHC insurance is in place on the refinanced mortgage.
- 03Request a CMHC Eco Plus rebate application package from your lender at close and confirm the lender's process for submitting it — some lenders submit on your behalf, others require the borrower to file directly with CMHC.
- 04Apply to your provincial retrofit rebate program (HER+, CleanBC, etc.) immediately after the post-retrofit evaluation is complete — do not wait for the CMHC rebate to arrive first.
- 05Run a full TDS calculation including any Canada Greener Homes Loan repayment before finalizing the refinance draw amount — confirm the combined debt load qualifies at the stress-test rate.
- 06Compare the all-in cost of CMHC Eco Plus (premium minus rebate) against a conventional green mortgage from a credit union if your equity position allows 20%+ down — the break-even is property-specific and worth modeling.