HRSP (with assessment)
ActiveGet $600 back on your energy assessments — then up to $7,700 for insulation
Audit required
Regional guide · updated August 23, 2026
The London home energy guide
London's snow-belt winters and older-than-average housing stock make it one of the highest-return audit cities in southwestern Ontario — the gap between a leaky house and a sealed one shows up hard on Forest City gas bills.
The housing stock, read like an auditor
Old North, Old East, and Wortley Village hold London's century stock — yellow-brick homes with empty walls and original attics. The post-war expansion filled Byron, Oakridge, and the east end with 1950s–70s bungalows and ranches: thin batts, bare basements, aging mid-efficiency furnaces. Lake-effect snow loads make attic bypasses especially visible here — ice dams are a London specialty.
What audits find in London
- Ice dams tracing back to attic air leaks rather than 'bad shingles'
- Yellow-brick century homes where the thermal scan decides the wall strategy
- R-10 post-war attics — the city's most consistent payback
- Uninsulated basements in homes now finishing lower levels
- Furnaces past 20 years facing the hybrid-or-heat-pump decision
Tests to ask for by name
- Blower door test — the leakage number that reorders your plan
- Infrared scan — finds the empty walls without opening them
- CSA F280 heat-loss calculation — before any heat pump quote
- Radon test — Health Canada recommends it for every home
Run the planner for the full test list matched to your house — it carries into your audit request automatically.
The rebate angle
Home Renovation Savings runs the standard stack — $600 toward assessments, insulation to $7,700, windows at $100 per opening on the two-upgrade path. London's freeze-thaw pattern makes the air-sealing + attic combination the classic qualifying pair, usually fully covered by rebates after the assessment credit.
HRSP (no assessment)
ActiveHeat pump and single-upgrade rebates without an assessment
No audit required
CMHC Eco Improvement
Active25% back on your CMHC mortgage insurance premium after energy renovations
No audit required
Registered advisors serving London
All 2 are NRCan-licensed service organizations — with direct links to their Google, HomeStars, and BBB reviews. Full directory view →
The Energuy
CompanyNRCan-registered service organization
Province-wide Ontario coverage; also active in BC, AB, SK, MB and several US states
AmeriSpec Canada
FranchiseNRCan-licensed for EnerGuide since 2001
National home-inspection franchise; EnerGuide services vary by local franchise
Common London problems, diagnosed
Drafts and cold rooms →Heating bills feel too high →Ice dams and icicles →Thinking about a heat pump →
Local questions
Every winter we get huge icicles — roof problem or insulation problem?
Almost always an attic problem: warm indoor air leaking up, melting snow that refreezes at the cold eaves. The audit's thermal scan finds the exact bypasses; sealing them plus a top-up beats heat cables every time.
What does an audit cost in London?
Typical Ontario pricing applies — roughly $400–$700 initial and $200–$400 follow-up — and the $600 HRSP rebate covers most of it when you complete the assessment path.
Plan it properly in London
Tell us about your home and we'll match you with a registered service organization — with the right tests flagged for your situation.
Email us what you’re planning and your postal code — we’ll reply with registered service organizations for your area and which rebates apply.
Email hello@audityourhome.com