How much you get
No assessment needed: attic & cathedral ceiling
Attic, from ≤R-12
Attic, from R-12–25
Attic, from R-25–35
Cathedral ceiling / flat roof
Assessment required: walls, foundation, crawlspace
Exterior wall
Foundation / basement wall
Basement slab
Foundation header
Crawlspace wall
Crawlspace ceiling
Exposed floor
The attic pays more here than on the no-assessment path
If you're already booking an assessment for other upgrades, do attic insulation through this tier instead, up to $1,500 (vs. $1,250) and $780 for cathedral ceiling (vs. $750).
Local programs in London
London Hydro (electricity) and Enbridge Gas (natural gas) serve most London homes, and neither runs its own insulation top-up rebate on top of HRSP. If London's new Community Energy Retrofit loan program ends up covering insulation once its terms are finalized, that would stack with the HRSP amounts above — but the City hasn't published confirmed loan caps yet, so don't plan around it before checking the City of London climate action page →.
How to claim it
- For attic: confirm eligibility, pick a participating contractor, get it installed, contractor submits the application
- For walls/foundation: book an energy assessment first, then follow the assessment-path steps
Browse HVAC, solar, and electrical installers near London →
Common questions
What insulation rebates are available in London?
London Hydro and Enbridge Gas customers use the same provincial Home Renovation Savings Program insulation tiers as the rest of Ontario — attic, wall, foundation, and crawlspace insulation, plus air sealing, generally as part of a broader retrofit. There's no separate London-specific insulation rebate on top of it right now.
Do I need an energy audit first in London?
Yes, but only for the assessment-required categories — walls, foundation, and crawlspace. Attic insulation on its own doesn't need a pre-retrofit assessment; a participating contractor can install and submit that one directly.
London Hydro won't pay you for insulation, but you'll still deal with them
The insulation dollars on this page come entirely from the province, not from London Hydro, the utility doesn't run a competing or stacked incentive for this category as far as we've found. That said, if your retrofit ends up bundled with electric upgrades (a heat pump, an EV charger, anything that changes your panel load), London Hydro is the one who signs off on service capacity before an installer can commit to a quote, and they're the ones who'll be billing whatever electricity that equipment draws afterward. Worth keeping their number handy even on an insulation-only job, since contractors sometimes loop them in anyway to confirm nothing else on the account needs attention.
Why London's winters make the payback math work harder for you
London sits inland from both Lake Huron and Lake Erie, and it shows in the numbers: a -7.5°C average January low across 2015-2024, with one night in that stretch dropping to -30.8°C. Every degree below freezing is heat your walls and attic are losing whether you notice it or not, and a home losing heat through R-12 attic insulation on a -30°C night is bleeding money at a rate a well-sealed home simply isn't. That's the entire case for insulation before anything fancier, the return shows up fastest in exactly the kind of cold snap London gets more than once most winters.
Next steps
View all London rebate programs → or check the official Home Renovation Savings Program site → for the current source of truth.