Can I sell my house if I owe more than it's worth?

This is a frightening thing to sit with, and it is worth saying at the start that the position is often better than it feels at 11pm. Very few people know what their home is genuinely worth today or what their mortgage balance actually is, so the fear tends to be built on two estimates rather than two facts.

It is also a widely shared worry. A Boon Brokers survey of 1,000 mortgage holders, reported on 4 August 2026, found 44% thought entering negative equity during their current term was likely, and 24% named it as their single biggest concern.

Read that carefully, because it is a survey of what people expect, not a count of how many are actually there. The two get confused constantly, and the confusion does a lot of the frightening.

What is negative equity?

Negative equity is when the amount you still owe on your mortgage is larger than the market value of your home. HSBC states it plainly: it means the amount you owe on your mortgage is more than the value of your home.

Equity is the share of your home you own outright, which is the value minus the mortgage. When that number goes below zero, you are in negative equity. It usually happens after a fall in prices, or where a very small deposit was put down and little capital has been repaid since.

Can I actually sell if I am in negative equity?

Yes. Nothing stops you putting the house on the market and accepting an offer.

The constraint arrives at completion. Your lender holds a legal charge over the property and will not release it until the mortgage is repaid in full, so if the sale price does not cover the balance, the shortfall has to be found from somewhere else before the sale can complete.

As HSBC puts it, the sale price may not cover what you owe, which means you might need to cover the difference from your own money. That is the whole mechanic in one sentence.

How do I find out where I really stand?

1. 1. Ask your lender for a redemption statement

   A redemption figure is the exact amount needed to clear your mortgage on a given date, including any early repayment charge. Ring your lender or request it in your online account. This is a hard number and it costs you nothing to get.

2. 2. Get more than one valuation of the property

   One agent's opinion is one opinion, and valuations of the same home routinely differ by tens of thousands of pounds. Ask several local agents what they would realistically achieve, not what they would list at.

3. 3. Subtract the mortgage from the realistic sale price

   Use the lower end of the valuations you were given, not the highest. If the result is positive, you are not in negative equity and the fear was doing the talking.

4. 4. Add the cost of selling

   Agent commission, conveyancing and removals come out of the sale too. A home that clears the mortgage by £3,000 may still leave you short once those are paid, so run the full figure rather than the headline one.

5. 5. If there is a genuine shortfall, work out its size

   There is a large difference between being £4,000 short and being £40,000 short. The first is a solvable problem with several routes through it. Knowing which one you are facing decides everything that follows.

6. 6. Talk to your lender before you do anything else

   Lenders deal with this regularly and would rather talk early than deal with a failed completion. Ask specifically about porting your mortgage, about their policy on shortfall arrangements, and about whether they offer any product for movers in this position.

7. 7. Get free, independent advice if the gap is large

   MoneyHelper is the government-backed money guidance service and its advice is free. If debt is part of the picture, free specialist help is available and it is better used early than late.

What are my options if there really is a shortfall?

None of these is automatic. Porting and shortfall arrangements both depend on the lender agreeing, which is why the conversation with them comes before the decision, not after it.

How likely is it that I am actually in negative equity?

Less likely than the mood suggests, unless you bought very recently with a small deposit. Prices have softened rather than collapsed: Rightmove reported asking prices down 2% in the month to August 2026, from £372,359 to £364,999.

A single month's move of that size does not put a long-standing owner underwater. ValuQ's own analysis of Land Registry sales has found that the owners most exposed are recent buyers in specific towns, rather than homeowners generally.

The number that decides this is not the one in your head. It is the redemption figure from your lender set against what several agents say your home would actually sell for.

How do I protect myself while I work this out?

• Do not accept an offer before you know your redemption figure, because you may agree to a price that cannot legally complete.
• Be wary of anything that promises a fast purchase at a discount. A quick sale at a reduced price makes a shortfall larger, not smaller.
• Keep paying the mortgage. Missed payments narrow your options with the lender at the exact moment you need their flexibility.
• Tell your conveyancer early. They need to know before contracts are drawn, and finding out at completion is how sales collapse.
• Take the valuations seriously but not the highest one. An agent who quotes a figure that makes the problem disappear on paper has not made it disappear.

What if I need to move for work or family reasons?

Then the question becomes how to fund the gap rather than whether to sell. Porting is the first thing to ask your lender about, because it lets you carry your existing deal to the next property.

Letting the property is the other common route where the move is temporary. It requires your lender's consent to let, and it turns you into a landlord with the duties that carries, so it suits some situations and not others.

Where does ValuQ fit into this?

The part of this you can settle today is the value side. ValuQ gives UK homeowners free, side-by-side property valuations from competing local estate agents, so you can see several realistic opinions of what your home would achieve on one screen, without giving your details to anyone until you choose to.

Put that against your redemption figure and you have replaced the worry with arithmetic. The decision about what to do next stays entirely yours, and it is a much better decision once it is made from real numbers.