Home equity is commonly used to fund renovations in Ontario, through a second mortgage, a refinance or a HELOC. Which is cheapest depends on your existing mortgage rate, any prepayment penalty, and whether you need the money as a lump sum or in stages as the work progresses.
Matching the financing to the project
A single lump sum — a roof, a furnace, a one-stage renovation — suits a second mortgage or a refinance. Work that runs in phases over months suits a HELOC, where you draw only what you use and pay interest on that.
For urgent, essential work such as a failed heating system or a roof leak, speed usually matters more than the last fraction of a percentage point. For a planned kitchen, it’s worth taking the time to compare properly.
Does the renovation add value?
Some work reliably supports value: kitchens, bathrooms, roofing, windows, heating and electrical. Some is largely personal enjoyment, which is a legitimate reason to spend but shouldn’t be counted on to increase the appraised value.
This matters practically, because a renovation that meaningfully raises value can lower your loan-to-value on reappraisal — and that can become the exit: refinance into a single first mortgage afterwards on better terms. Where the work won’t move value, that exit isn’t available and the plan needs to rest on something else.
The options compared
- Second mortgage — keeps a good first mortgage rate intact; higher rate on the new funds; lump sum
- Refinance — one mortgage, lowest cost where you qualify; penalty usually applies; best when your rate is near market
- HELOC — draw in stages, interest only on what you use; requires full qualification; rate typically variable
- Waiting until renewal — no penalty; only works if the timing suits the project
Risks to understand
- Renovation costs commonly exceed estimates — build in a contingency rather than borrowing to the limit
- The debt is secured against your home
- Not all work increases appraised value; don’t assume the reappraisal exit
- Private or second financing costs more and renewal is not guaranteed
- Final approval depends on the complete application and lender review
Documents generally needed
Contractor quotes or a scope of work, mortgage statement, property tax bill, proof of insurance, photo ID and income documents. For staged draws, lenders may want the schedule and inspections at each stage.
Frequently asked questions
Can I borrow based on the value after renovation?
Some lenders offer improvement or purchase-plus-improvements programs that consider the as-improved value, usually with funds advanced against completed work and verified by inspection. Availability and conditions vary by lender.
Is a HELOC better than a second mortgage for renovations?
For staged work where you draw over time, often yes. For a lump sum, or where full qualification for a HELOC isn’t available, a second mortgage may be more practical. It depends on the project and on what you qualify for.
Keep reading
This page is general education about mortgage options in Ontario. It is not legal, accounting, tax or insolvency advice, and it is not an offer of credit. Please seek independent professional advice for your own situation.