What Is Gazumping and Is It Legal In The UK?

What is Gazumping?

It’s one of those words that is uniquely associated with house buying and selling. But what does ‘gazumping’ actually mean?

At a glance - what is gazumping?

The definition of gazumping

According to The Cambridge Dictionary, to gazump is to ‘refuse to sell a house that you own to someone you have agreed to sell it to, and to sell it instead to someone who offers to pay more for it’.

To use a real-world example, let’s say you have had an offer accepted on a house and you are in the process of buying it. Somebody would ‘gazump’ you if they came in and offered more than you had, and the seller then stopped the process with you and instead started selling it to them.

Essentially, you are back to square one and back on the search for the perfect home again. And the most frustrating aspect of gazumping is that it can happen at any time before you’ve exchanged contracts. Certainly, from a buyer’s perspective, it’s not an ideal solution and can cost a lot of time and money, so how can you avoid it?

Why does gazumping happen?

In some cases, the seller is just greedy. They want to make as much money on the property sale as possible, and have no qualms about breaking an agreement with a buyer.

However, it is also seen as a solution to an unnecessary long sale. For example, the seller might be frustrated at the speed with which the property sale is progressing.

If the buyer is taking too long to get a survey done, or sell their own home if they are buying and selling at the same time, or slowing down the chain in other ways, the seller can lose their patience. 

The seller may decide to reject the existing buyer’s offer in favour of someone who is in a better position to move more quickly.

When can gazumping happen during the home buying process?

Gazumping can happen at any stage before contracts have been exchanged – or in other words, before the sale of the house becomes legally binding. Unfortunately, in England and Wales there is nothing stopping a seller from accepting another offer, even after a property has been taken off the market and has ‘Sold – STC’ on its listing on property websites. An estate agent is also legally obliged to pass on any offers they receive, even if the property is at the ‘sold, subject to contract’ stage.

Gazumping vs gazundering – what’s the difference?

You may have heard of the term ‘gazundering’ – this is when a buyer reduces their offer at a very late stage of the house buying process, but before exchange of contracts. It is the seller who is affected in this case, because unless they are prepared to lose the sale and start all over again, they may feel forced to accept the lower offer. Again, there is nothing illegal about gazundering. Buyers ‘gazunder’ sellers because they know that sellers are in a vulnerable position – especially if they are part of a long chain.

There might be a legitimate reason for buyers reducing their offer – a survey could have revealed structural issues, or repairs that the house needed. But in this case most sellers would see this as fair negotiation and accept the lower offer. This isn’t really ‘gazundering’. When people ‘gazunder’ it’s normally just a tactic to save some money.

Is gazumping legal in the UK?

In England and Wales there is nothing in law to stop gazumping from happening. In Scotland things are different, and property sales become legally binding when an offer is accepted. In Scottish property law, after each party’s solicitors start exchanging letters, withdrawing from the agreement has financial penalties.

The UK government announced in June 2026 that it would be looking to introduce a new system of sales information packs that would give more protection to buyers, although these new measures would not come into law until at least 2029.

What protections do buyers have against gazumping?

Although there are few legal protections, there are some things you can do to mitigate against gazumping.

Home buyer protection insurance

There’s very little you can do to stop the seller accepting a much higher offer than yours, but if you take out home buyer protection insurance, you’ll be able to claim back some of your conveyancing fees, survey fees, and any other costs you may have had to pay out.

Have your mortgage in principle in place

Don’t make any offers until you have your mortgage agreement in principle in place. It’s also best practice to have a solicitor lined up and all the necessary documentation to hand. Essentially, the more prepared you are, the smoother the process and the less likely you are to have to fend off a higher offer.

Move the process along as quickly as possible

Once contracts are exchanged, the sale is legally binding, so get to that part of the process as quick as you can. You can do this by keeping in regular contact with your broker and solicitor to chase documents, answer questions the seller may have, and essentially keep the pressure on to complete the sale.

Ask for the property to be taken off the market

If the property isn’t on the market, it’s far harder for anyone else to come in with a higher offer. It’s standard practice to ask sellers to do this.

Get a survey done as soon as possible

A survey is often the part of the house buying process that causes the most delays, or the most concerns for both buyers and sellers. Sellers will appreciate it if buyers can arrange a survey soon after the price has been agreed. It also shows that a buyer is committed to the purchase, because of the cost involved.

Lock in agreement

A lock in agreement (sometimes called a lock out agreement) is a contract between the seller and the buyer stating that the buyer has the exclusive right to buy the property within a certain time period. This prevents any other offers being considered until that time is up. This sounds great. However, the seller has to be willing to sign this and you will need to discuss the cost of drawing up the agreement with your solicitor. But it does prove you’re serious about completing the purchase and may work well if the seller has already had a sale fall through or wants to move fast.

Estate agents and gazumping

You might hear that some estate agents actively encourage gazumping to make more on the sale themselves. However, remember that even after the seller has accepted an offer from one buyer, the estate agent is legally obliged to pass on any offer they receive. If this offer happens to trump the initial accepted offer, then gazumping could be inevitable.

As a buyer, if you have had your offer accepted and the agent comes to you with news of a better one, ask to see proof of it in writing. Then you can decide how you wish to proceed.

What should you do if you are gazumped?

Despite doing everything you can to avoid getting gazumped, it can still happen. Here are some options available to you:

• Review your finances and consider whether you can gazump your gazumper with a higher counter-offer. Remember to always be mindful of how far you can truly stretch your finances and know that you could well be gazumped again.
• Highlight absolutely everything that works in your favour to convince the seller to stick with your offer. After all, it’s not always about money: you might be a first-time buyer with no chain and utterly flexible on moving date or the higher offer may not have a solicitor lined up or even a mortgage in place. Do whatever you think will appeal most to your vendor.

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