How does OBC 9.36 energy code apply to my Toronto reno?

OBC Section 9.36 applies to your Toronto renovation based on the scope of work — not every reno triggers full compliance, but understanding where the thresholds are can save you from costly surprises at inspection.

Ontario's energy efficiency requirements under Section 9.36 of the Ontario Building Code came into full effect in 2017 and were updated again in 2022, making them significantly more stringent than what older Toronto homes were built to. The key principle is that 9.36 is triggered by the type and extent of work you're doing, not simply the fact that you're renovating.

When 9.36 Applies to Your Renovation

For most Toronto homeowners, the practical trigger points are:

• Adding conditioned space (finishing a basement, adding an addition) — this almost always requires full 9.36 compliance for the new area
• Replacing the building envelope — new windows, exterior doors, roofing, or re-insulating walls typically must meet current thermal performance standards
• New HVAC equipment — replacing a furnace, adding mechanical ventilation, or installing new ductwork brings 9.36 into play for the mechanical systems
• Substantial renovations — if you're touching more than 25% of the building envelope in a 5-year period, the City of Toronto's building inspectors may require broader compliance

Smaller cosmetic renovations — flooring, painting, kitchen cabinet replacements — generally don't trigger 9.36 requirements.

What 9.36 Actually Requires

The code sets minimum RSI/R-values for insulation depending on your building assembly. For a Toronto home (Climate Zone 6), typical minimums include R-31 for attics, R-20 for above-grade walls (or R-13 continuous), and R-10 for basement walls. Windows must meet minimum U-values and Energy Star ratings appropriate for the zone. The code also requires airtightness measures — proper vapour barriers, sealed penetrations, and in some cases blower door testing for new construction.

For mechanical systems, 9.36 mandates heat recovery ventilators (HRVs) in new builds and substantial renovations, minimum AFUE ratings for furnaces (96% for most new installs), and proper duct sealing.

Toronto-Specific Considerations

Toronto Building Division enforces 9.36 compliance at permit stage — your drawings must demonstrate compliance before a permit is issued. The two compliance pathways are the prescriptive path (meet each individual requirement) or the performance path (use energy modelling software to show equivalent overall performance). Most residential renovations use the prescriptive path. For older homes in neighbourhoods like The Annex or Cabbagetown, the performance path sometimes offers more flexibility when working around heritage constraints or unusual wall assemblies.

It's worth noting that Toronto's Toronto Green Standard (TGS) applies to new buildings and major additions, layering additional requirements on top of OBC 9.36 for projects above a certain size.

Your Best Next Step

The honest answer is that 9.36 compliance is highly project-specific. Before finalizing your renovation plans, have a conversation with a qualified building designer or energy advisor who can assess exactly which sections apply to your scope. When you submit for your building permit at toronto.ca/building (or call 416-397-5330), the plan examiner will flag any 9.36 compliance documentation required.

Browse licensed contractors and building professionals in our directory at the Toronto Construction Network — many experienced Toronto renovators can advise on energy code compliance as part of their project planning process.