Negative Equity in Property — What It Is, What Causes It, and Your Options

What is Negative Equity?

Negative equity occurs when the outstanding balance on your mortgage exceeds the current market value of your property.

**Example:**

• Mortgage outstanding: £220,000
• Property market value: £190,000
• Negative equity: £30,000

The term “equity” refers to the portion of the property you own outright (value minus debt). When debt exceeds value, equity is negative.

What Causes Negative Equity?

**Falling house prices:** The most common cause. If prices fall after you purchase, particularly if you bought with a high loan-to-value mortgage, you can quickly find yourself in negative equity. UK house prices have fallen in nominal terms during previous downturns (1989–93, 2008–09) and in real terms during other periods.

**High LTV purchase:** Buyers who purchase with a 95% mortgage have only 5% buffer before they enter negative equity. A 5% fall in prices eliminates their equity entirely.

**Interest-only mortgages:** If you have an interest-only mortgage and are not reducing the outstanding capital, you rely entirely on house price growth to accumulate equity.

**New-build premium:** New-build properties sometimes sell at a premium over equivalent second-hand properties. If the new-build premium disappears on resale, the value may drop to the second-hand equivalent immediately after purchase.

Why Negative Equity Matters

**Remortgaging:** Mortgage lenders use loan-to-value to set rates. In negative equity, your LTV is above 100%, which means no standard lender will offer a new deal. You are typically stuck on your existing lender’s standard variable rate (usually 1–2% above the equivalent fixed rate).

**Moving:** To sell, you would need to repay the full mortgage. If the sale proceeds are less than the outstanding mortgage, you must make up the difference from savings or another source. Most people in negative equity cannot move unless they have the shortfall available in cash.

**Separation:** When a relationship breaks down, negative equity makes the property impossible to sell without both parties contributing the shortfall. This can trap couples in properties for years.

Your Options in Negative Equity

**Wait it out:** If you can afford the payments and do not need to move, time may solve the problem. UK property prices have historically recovered from downturns, though this can take years. Monitor your property’s value against the outstanding mortgage balance annually.

**Overpay your mortgage:** If your mortgage allows overpayments (most do, up to 10% of the outstanding balance per year without penalty), making regular overpayments reduces the debt and can bring you back into positive equity faster.

**Negotiate with your lender:** Some lenders offer “negative equity porting”, allowing you to move house and take the negative equity with you as a second charge on the new property. This is not universally available but is worth discussing with your lender.

**Sell and use savings:** If you must move (job relocation, divorce, etc.) and you have savings to cover the shortfall, you can sell and pay the difference. You will need your lender’s consent to sell a property in negative equity.

Tracking Your Position

Monitoring your property’s current market value helps you understand whether you remain in equity and how your position is changing. Property Passport UK displays HM Land Registry sold price data for comparable properties in your area, which provides one input for estimating current market value alongside independent valuations.