Deep energy retrofits are gaining traction in Ontario as federal incentives make the economics increasingly compelling. Here’s the 2026 landscape.
EnerGuide rating baseline:
Most existing Ontario homes: EnerGuide 40-60. Deep retrofit target: 75-85+ for maximum Greener Homes funding. Pre- and post-retrofit evaluations required: $400-$800 each with certified energy advisor.
PassiveHouse standard in Ontario:
- Annual heating demand: below 15 kWh/sq m/year
- Airtightness: below 0.6 ACH50
- Mechanical HRV/ERV required
- Thermal bridge-free construction
GTA retrofit to PH standard (typical semi-detached): $150,000-$300,000. Requires exterior insulation (R-30+ walls), R-60+ attic, triple-pane windows, comprehensive air sealing.
Net-zero vs PassiveHouse:
NZE = produce as much energy as consumed annually (typically through solar). Does not require PH envelope performance. Most economical path: deep energy retrofit to reduce consumption, then smaller solar system for net-zero.
Canada Greener Homes incentives (2026):
- Grant: up to $5,600 for individual upgrades
- Loan: up to $40,000 at 0% interest over 10 years for deep retrofits
- Both require pre/post EnerGuide evaluation
- Verify program status – federal programs change with budget cycles
Has anyone completed a deep retrofit in the GTA? What EnerGuide score did you achieve?
High-performance renovation questions at home.renovation.reviews