Where the Money Actually Comes From
Most second unit projects in Ontario are funded by refinancing up to eighty percent of the home's value, by a home equity line of credit, or by a purchase plus improvements mortgage when you are buying and building at once. Each option prices differently and each has a different approval bar. Choosing before you hire a contractor keeps you from financing the build on credit cards partway through.
How Lenders Treat the Future Rent
Some lenders will count a portion of projected rent from a legal, self contained unit toward your qualifying income, which can meaningfully raise what you can borrow. Others ignore rent until it shows on a signed lease and a tax return. The word legal matters, because an unpermitted unit generally counts for nothing and can complicate your insurance.
Budget for the Boring Costs
Permits, drawings, an appraisal, a possible servicing upgrade and the months of carrying costs while the unit sits empty all belong in your number. Build a contingency of roughly fifteen percent and you will sleep better. Done properly, a second unit is one of the few renovations that pays you back every month.
Frequently Asked Questions
Can I use rental income from a basement apartment to qualify?
Often yes, if the unit is legal and self contained. Lenders vary between counting fifty and one hundred percent of market rent, and some require an appraiser's opinion of rent, so the lender you choose changes your approval amount.
How much can I borrow against my home to build a garden suite?
A refinance generally allows up to eighty percent of the appraised value minus your existing balance. On a home appraised at one million with a five hundred thousand mortgage, that is roughly three hundred thousand in accessible equity.
Do I need the permits before I get financing?
Not always to start, but lenders releasing funds in draws will want to see permits and inspections before releasing money. Getting the financing approved first and the permits in progress early avoids stalled construction.
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