Your home equity is what your house is worth today minus everything you still owe against it. Take your current market value, subtract your remaining mortgage balance plus any secured line of credit or second mortgage, and the number left over is your equity. Lenders will not let you borrow all of it, so the amount you can actually access is usually up to 80 percent of your home’s value, less what you already owe.
That second half is the part almost nobody explains, so let’s walk through both numbers together.
The simple math, in one line
Home value today, minus everything secured against the home, equals your equity.
Two words are worth defining right away, because they get used loosely and they change the answer.
Home value means what your house would realistically sell for today, in this market, in your neighbourhood. It is not what you paid, and it is not what your neighbour listed for.
Secured debt means anything registered against your title. Your mortgage, obviously. Also a home equity line of credit (a HELOC is a revolving credit that works like a credit card, secured by your home), a second mortgage, or a home equity loan. Your credit cards and car loan are not part of this number, because they are not attached to your house.
Say a Simcoe County home is worth roughly $700,000 today and the mortgage balance sits around $400,000, with nothing else registered on title. That homeowner has about $300,000 of equity. Illustrative numbers, chosen to keep the math easy.
Total equity versus usable equity
Here is where a lot of homeowners get an unpleasant surprise, and I would rather you hear it from me first.
Having $300,000 of equity does not mean a lender will hand you $300,000. Canadian lenders keep a cushion in the home so it stays a safe asset for everybody, including you. On a standard refinance, most lenders will go up to 80 percent of your home’s appraised value across all your secured debt combined. When a HELOC is part of the structure, the revolving HELOC portion on its own is generally capped at 65 percent of the home’s value, with the total still landing at that 80 percent ceiling.
Run the same illustrative home through it. Eighty percent of about $700,000 is roughly $560,000. Subtract the existing $400,000 mortgage and you land near $160,000 of usable equity, rather than the full $300,000. Still a meaningful amount, and a very different conversation than the first number suggested.
Fair warning, that is a rough sketch. Your credit, your income, the property type, and the lender all move the final figure. A cottage, a rural property, or a rental gets looked at differently than a house in town.
How lenders decide what your home is worth
Your own estimate is a starting point. The lender’s estimate is the one that counts.
Most of the time a lender orders an appraisal, where a licensed appraiser looks at your home and at recent comparable sales nearby, then gives a value. Some smaller requests get approved with an automated valuation instead, which is a computer model built on sales data. Either way, the number that drives your file comes from the lender’s side.
This is why I gently steer people away from aspirational math. Pricing your home at what you hope it is worth feels good for an afternoon and then reshapes the whole plan when the appraisal lands lower. A realistic value up front means the plan we build actually holds together.
Three ways to get a real estimate before you call anyone
You can get close on your own in about twenty minutes, woohoo.
Pull your current mortgage balance. Log into your lender’s portal or look at your last annual statement. Use the balance, not your original mortgage amount. Years of payments have moved that number.
Look at what actually sold near you. Recent sold prices for homes genuinely like yours, same size, same style, same general area, tell you far more than active listings do. Anyone can ask any price. Sold is truth.
Add up anything else registered on your home. A HELOC balance, a second mortgage, a builder’s lien, a home equity loan. Subtract all of it along with the mortgage.
That gives you a working number. It will not match the lender’s number exactly, and it does not need to. It gets you close enough to know whether a real conversation is worth having.
Why the number matters more than people think
Equity is quiet. It builds while you sleep, through your regular payments chipping away at the balance and through your home’s value drifting up over the years. Most homeowners I sit down with have no idea how much their house has quietly made them, and watching that land is honestly my favourite part of the job.
Knowing the number changes what feels possible. A family carrying high-interest credit cards discovers they have room to roll that debt into something far cheaper. A couple who decided years ago that a cottage was out of reach finds out it was closer than they thought. Someone dreading a renewal realizes they have options beyond signing whatever the bank mails them.
None of that requires selling your house. Equity can be accessed while you keep living in the home, through a refinance, a HELOC, or a second mortgage, depending on which one fits your situation.
When your equity is smaller than you hoped
Sometimes the math comes back thin, and I will always tell you straight if it does.
Buying recently, a market dip, or a previous equity take-out can leave less room than expected. That is real information, and it is still useful. Knowing you are two years away from a comfortable move lets you plan for it instead of being caught off guard. We can also look at whether paying down a specific debt, waiting for a renewal, or a different lender changes the picture.
Getting a clear answer is worth something even when the answer is “not yet.”
FAQ
How do I calculate my home equity?
Take your home’s current market value and subtract everything secured against it, which means your mortgage balance plus any HELOC, second mortgage, or home equity loan. The remainder is your equity.
How much of my home equity can I actually borrow in Ontario?
Generally up to 80 percent of your home’s appraised value across all secured debt combined, less what you already owe. If a HELOC is part of the setup, the revolving portion on its own is typically capped at 65 percent of the home’s value.
Does my down payment count as equity?
Yes. Your original down payment was equity from day one, and it has grown since through your principal payments and any increase in your home’s value.
Do I need an appraisal to find out my equity?
Not to get a rough idea. You can estimate it yourself using recent comparable sales and your current mortgage balance. A lender will order an appraisal or an automated valuation when you actually apply, and that number is the one your file runs on.
Can I access my equity without selling my home?
Yes. A refinance, a HELOC, or a second mortgage all let you access equity while you keep living in the house. Which one fits depends on your goal, your timeline, and your current mortgage.
About the author
Lora Fenn, Mortgage Agent Level 1, DLC Yellow Brick Mortgages (Brokerage Licence #13854), Mortgage Maven — a mortgage agent helping when traditional guidelines say no, serving Barrie, Oro-Medonte, Simcoe County, Collingwood, Muskoka and Cottage Country.
Let’s talk
If you are curious what your home has quietly built for you, I would love to run the real numbers with you. Book a free 15-minute equity-and-rate chat, and grab my free guide at lorafenn.ca/free-home-equity-guide-for-ontario-homeowners. No pressure, just clear options so you can make a smart financial decision.
This page is general education, not financial advice. Any figures are illustrative only and subject to lender approval (O.A.C.). Lora Fenn, Mortgage Agent Level 1, DLC Yellow Brick Mortgages (Brokerage Licence #13854).
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