House Equity Calculator — How Much Do You Actually Have?

Before you run the numbers through our house equity calculator, it helps to see where the average UK homeowner stands. Two figures from UK mortgage industry data, from IMLA's 2026 market outlook.

The average mortgaged home in the UK now holds just over 40% equity.

Across the UK housing stock, an estimated £677 billion of equity has built up since the financial crisis, through a mix of mortgage repayment and rising property values.

Most homeowners never actually sit down and work out their own number. They know roughly what their mortgage payment is each month, but not what percentage of their home they truly own, or what that ownership stake could unlock.

With the average UK house price around £298,000 (Halifax, early 2026) and average outstanding mortgage debt reported anywhere between roughly £140,000 and £200,000 depending on the data source and how it's measured, a typical mortgaged homeowner is sitting on somewhere in the region of £100,000–£160,000 of equity, often without realising it.

This house equity calculator uses the exact calculation lenders run internally, and it is simpler than most people expect.

Property value is the foundation of the whole calculation. If you're not sure, a free online estimate or recent sold prices for similar homes nearby is a reasonable starting point, though a formal valuation or appraisal will always be more precise, and is what your lender will actually use.

Outstanding mortgage balance is what you still owe today, not what you originally borrowed. Check your latest mortgage statement or your lender's online account for the exact figure.

Other secured loans means anything else charged against the property, such as a second charge mortgage, a secured home improvement loan, or a further advance you've already taken. These reduce your usable equity even though they're separate from your main mortgage.

Once you have your equity figure in pounds, two more numbers matter just as much: your equity percentage (equity ÷ property value × 100) and your loan-to-value ratio, or LTV (total secured debt ÷ property value × 100). These two percentages together are what any UK or Canada lender will look at first.

The lower your loan-to-value, the less risk a lender takes on, and the better the rate they can usually offer.

These figures are based on average 2-year fixed rates reported for early 2026: around 5.46% at 90% LTV, 5.17% at 85% LTV, and 5.14% at 75% LTV. The gap between bands can easily be worth thousands of pounds over a mortgage term, which is exactly why knowing your precise equity and LTV before you start comparing deals matters.

Once your house equity calculator result shows how much you own, there are several ways to access it, and they suit very different situations.

This house equity calculator tells you the raw numbers behind both routes. If you are 55 or over and want to see how much tax-free cash a lifetime mortgage could release specifically, try our dedicated equity release calculator, which factors in your age alongside your property value and existing mortgage. Raising money for a specific project? The remortgage for home improvements calculator also checks whether the works pay for themselves.

Overpaying your mortgage is the only method on this list that is fully within your control and guaranteed pound-for-pound. Even modest, regular overpayments compound meaningfully over a 25-year term, because you reduce the balance interest is calculated on for every remaining year. Run the numbers with the loan overpayment calculator.

Home improvements can absolutely add value, but the return depends enormously on the project and your local market. A poorly executed extension can cost more than it adds, while a well-planned loft conversion in the right area often adds significantly more than it cost. Always research comparable local sales before assuming a renovation will pay for itself in equity.

Before overpaying, check your mortgage terms for an early repayment charge or an annual overpayment allowance (commonly 10% of the balance per year penalty-free), since exceeding it can trigger a fee that cancels out the benefit.

Once your house equity calculator result shows your LTV, it helps to know what each band actually unlocks. UK and Canada lenders both group mortgage and remortgage products into loan-to-value bands. Landing just inside a lower band, even by a small margin, can noticeably change the rates on offer.

60% LTV is generally the threshold for the very best rates on the market. 75% LTV still gives access to strong rates and wide lender choice. 80-85% LTV is the standard range most remortgage and home mover deals fall into. 90%+ LTV is typically first-time buyer or low-deposit territory, with a smaller pool of lenders and higher rates.

If our calculator shows you are just above one of these thresholds, even a modest overpayment or a conservative property revaluation could be enough to drop you into a cheaper band before you remortgage.

Sarah's home is worth £300,000. Her outstanding mortgage balance is £180,000, and she has no other secured loans.

The equity

Home equity = £300,000 − £180,000 = £120,000. Equity % = (£120,000 ÷ £300,000) × 100 = 40%. LTV = (£180,000 ÷ £300,000) × 100 = 60%.

At 60% LTV, Sarah sits right at the threshold for the most competitive mortgage rates available, a strong position for remortgaging.

What she could borrow

If Sarah wanted to raise money for a home extension and her lender allows up to 80% LTV for further borrowing, her maximum total borrowing would be £300,000 × 80% = £240,000.

Subtracting her existing £180,000 balance, she could potentially access an extra £60,000 through a remortgage or further advance, subject to affordability and her lender's criteria.

Official sources & further reading: check current lending data from UK Finance, read the MoneyHelper guidance on remortgaging, review the IMLA market outlook behind our equity statistics, and verify any adviser on the FCA register. Browse every tool on the mortgage calculators homepage.