The breakdown
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).
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 Whitby →
Common questions
What insulation rebates are available in Whitby?
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.
Do I need an energy audit first in Whitby?
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.
Next steps
View all Whitby rebate programs → or check the official Home Renovation Savings Program site → for the current source of truth.