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).
Markham has no municipal insulation program or top-up of its own, the city is running a joint feasibility study with Richmond Hill on a future retrofit program, but nothing is live yet. Everything above is the standard provincial HRSP stack, the same one available to every Ontario homeowner regardless of city.
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
- Watch for updates on the Markham/Richmond Hill retrofit feasibility study, which could eventually add a local top-up
Browse HVAC, solar, and electrical installers near Markham →
Common questions
What insulation rebates are available in Markham?
Ontario's Home Renovation Savings Program covers attic, wall, and basement insulation, plus air sealing, usually as part of a broader retrofit. Amounts depend on the scope of work and typically run a few thousand dollars.
Does Markham have its own insulation rebate?
No. Markham has no municipal energy program yet, the city and Richmond Hill are running a joint feasibility study for a future retrofit program, but nothing is live. The insulation amounts on this page are the standard provincial HRSP stack.
Do I need an energy audit first in Markham?
Yes. Ontario requires a pre-retrofit home energy assessment before insulation work qualifies, so the auditor can confirm the upgrade and measure the improvement afterward.
Alectra bills Markham, along with most of York Region
Markham's power bill comes from Alectra Utilities, formed out of a merger of several GTA-area hydro companies and now one of the largest electric utilities in the province. That size doesn't buy Markham homeowners a local insulation top-up, none exists right now, on top of the provincial numbers above, but it does mean the utility has fairly standardized processes for the parts of a retrofit that touch the electrical side, like confirming service capacity before an installer commits to a larger job. If your contractor needs anything from the utility mid-project, Alectra's scale tends to mean a defined process rather than a one-off phone call, for better or worse depending on how busy they are that month.
Markham's cold snaps are exactly what this rebate is designed for
Over 2015-2024, Markham's January nights averaged -8.4°C, and the coldest single night in that decade hit -27.8°C, a full degree colder on average than nearby Toronto, since Markham sits further from Lake Ontario's moderating effect. On a night like that, an attic sitting at R-12 or below is dumping heat straight into the outdoors, and that loss compounds every winter you leave it unaddressed. The provincial rebate exists precisely to shrink that gap faster than most homeowners would get around to on their own.
Next steps
View all Markham rebate programs → or check the official Home Renovation Savings Program site → for the current source of truth.