Gazumping in England and Wales: how to avoid it

Gazumping is when a seller accepts a higher offer from another buyer after already agreeing a price with you, before contracts are exchanged. Nothing is legally binding at that point, so either side can still walk away. Buyers in England and Wales can lower the risk by moving fast, proving they are ready to proceed, and knowing what the property is really worth.

What gazumping means in England and Wales

A property sale in England and Wales only becomes legally binding when buyer and seller exchange contracts, so a seller can accept a different offer at any point before that. Until exchange, the deal rests on the agreed price and on both sides' willingness to carry on.

The usual sequence looks like this:

You view the property and make an offer.
The seller accepts, usually described as subject to contract.
You instruct a solicitor or licensed conveyancer, and you apply for a mortgage if you need one.
Searches and a survey are carried out, and your solicitor raises enquiries.
Contracts are exchanged, and the sale becomes binding.

Everything before step five is a statement of intent. An agreement in principle from a lender, a booking with a surveyor or a letter from your solicitor does not create a contract. That is also why a seller who has accepted your offer can still show the property to someone else.

The mirror image of gazumping is gazundering, where the buyer lowers their offer late in the process. Both happen for the same reason: the price is not locked until exchange.

Why gazumping happens

Gazumping is most likely when demand is strong, the same type of home is in short supply, and the seller keeps receiving offers after accepting one. A few common triggers:

A higher offer arrives, sometimes only slightly higher, and the seller wants the extra money.
The seller is buying onward and needs a fixed figure to fund their next purchase.
Your position looks slower or less certain than another buyer's, for example because you have a home to sell or your mortgage is not yet in place.
The estate agent carries on marketing the property, so new buyers keep coming forward.

Sellers are not obliged to stop looking, and there is no general penalty for changing their mind before exchange. Estate agents are expected to pass offers on to the seller, which can reopen a decision you thought was settled.

Some buyers ask for an exclusivity or lock-out agreement, where the seller agrees not to accept other offers for a set period. These arrangements exist but are not standard, and whether one is worth asking for is a question for your solicitor.

How buyers can reduce the risk of being gazumped

You cannot remove the risk completely, but you can make yourself the buyer a seller does not want to lose. Speed and certainty matter more than a clever letter. What tends to help:

Get a mortgage decision in principle before you offer, so the seller knows you can borrow.
Have your solicitor or conveyancer ready to instruct the day your offer is accepted.
Book the survey and return paperwork quickly instead of waiting for perfect conditions.
Be honest about your position: if you have a property to sell, say so and explain the plan.
Ask the seller, through the agent, to take the property off the market while you proceed.
Put the agreed price and any conditions in writing, and keep the emails.

Being the buyer who answers the phone, sends documents back the same day and keeps the process moving is often the difference between keeping a sale and losing it.

Know the numbers before you offer

One practical defence against gazumping is knowing what the home is genuinely worth, so you are not pushed into a bidding contest you cannot win. Sold house prices shows what nearby homes actually sold for, based on HM Land Registry price paid records, and the house price map lets you see how values shift from one street to the next. If you are still deciding what to offer, a house value check gives you a starting point, and the methodology page explains where the figures come from. None of this predicts a sale price, but it stops you negotiating blind.

What gazumping costs a buyer who has already spent money

If you are gazumped, the money you have already paid out before exchange is normally not recoverable from the seller, because no contract existed. That can include legal fees for work already done, a survey, a mortgage valuation or arrangement fee, and local authority and other searches.

Most of that spending happens early, usually within days of your offer being accepted, when the sale still feels safe. It is worth knowing what you are committing to before you instruct anyone:

Searches are largely specific to the property, so a local authority search bought for one home usually cannot be used for another. Your solicitor can tell you which items are transferable.
A survey report belongs to you rather than the lender, and can sometimes be discussed with the surveyor if you move on to a different property. Policies differ between firms, so ask first.
Mortgage costs depend on the lender and the product. Ask what is refundable if the purchase falls through before completion.
Time is the other cost. Starting again on a new property means new searches, a new survey and often a new mortgage application.

A short written summary from your solicitor of what is spent at each stage makes the risk concrete, and helps you decide how quickly to move on a home you really want.

Frequently asked questions

Is gazumping illegal in England and Wales?

No. A sale in England and Wales is not legally binding until contracts are exchanged, so a seller who accepts a higher offer before that point is not breaking a contract with you. An exclusivity agreement, if you have one, changes the position and is a matter for your solicitor.

Can I stop a seller from accepting a higher offer?

Not with certainty, but you can reduce the chance by making your position strong and fast, asking for the property to be taken off the market, and asking your solicitor about a lock-out agreement. The only point at which the price is truly fixed is exchange of contracts.

What is the difference between gazumping and gazundering?

Gazumping is a seller accepting a higher offer after agreeing yours, while gazundering is a buyer lowering their offer late in the process, shortly before exchange. Both rely on the same gap: nothing is binding until contracts are exchanged.