What is gazumping — and how do you protect yourself?

What gazumping means

Gazumping is when a seller withdraws from an agreed sale with one buyer to accept a higher offer from another. The original buyer loses the property—and potentially the cost of a survey they have already paid for.

Example: You agree to buy a house for £300,000. Two weeks later, the seller tells you they have received an offer of £310,000 and are accepting it instead. You are out. Your only recourse is to make a higher offer (if you want the property) or walk away.

Gazumping is distinct from gazundering, which is when a buyer reduces their offer immediately before exchange, claiming they cannot get a mortgage at the original price. Both are legal in England and Wales.

Why it is legal in England and Wales

Gazumping is legal because there is no legally binding contract until both parties exchange contracts. An offer, once accepted, is a gentleman's agreement—not a contract. Either party can withdraw, though the person withdrawing may lose goodwill, money already spent (on surveys, legal fees), or time.

The English law position: In England and Wales, the seller can accept an offer and withdraw at any time before exchange, even if they have received enquiries from your solicitor or agreed to a completion date with you. The only moment it becomes binding is when both parties sign and exchange contracts.

Why this law exists: This system protects both buyers and sellers. A buyer can withdraw if a survey reveals problems. A seller can withdraw if the market rises sharply. The trade-off is that neither party is safe until exchange.

In Scotland it is different: In Scotland, an offer (once accepted) is legally binding. Gazumping is much rarer because the seller cannot legally withdraw once they have accepted your offer.

When it most commonly happens

Gazumping is not random—it happens in specific market conditions.

• Rising markets: When property values are climbing, sellers are tempted to hold on for higher offers. A seller accepts your offer at £300,000 but sees two other viewings scheduled. If those viewers offer more, the temptation to gazump increases.
• Long delays between offer and exchange: The longer the gap between acceptance and exchange, the higher the chance that the market moves or the seller's agent finds another buyer. Gaps of 12+ weeks are higher-risk.
• Underpriced properties: If a property is listed below market value, multiple viewings come in quickly. Sellers feel they made a mistake and are more likely to entertain higher offers.
• Buyer hesitation: If a buyer is slow to book a survey, slow to apply for a mortgage, or hesitant about commitment, a seller may sense vulnerability and look for a backup offer.
• Continued marketing by the agent: If the seller's agent continues showing the property to other buyers after your offer is accepted, higher offers are more likely to emerge.

In a normal, stable market, gazumping is rare. In a fast-rising market (like the 2020-2022 period), gazumping becomes more frequent.

How buyers can protect themselves

As a buyer, you cannot legally prevent gazumping, but you can reduce the risk.

• Secure your mortgage offer early: Before making an offer, ask your lender for a mortgage in principle. Once your offer is accepted, apply immediately for a full mortgage offer. A buyer with a ready-approved mortgage looks committed and moves faster through conveyancing.
• Book a survey quickly: Show the seller you are serious. Book a surveyor within days of your offer being accepted, not weeks later. This signals commitment.
• Instruct a solicitor immediately: Having a solicitor in place immediately after offer acceptance demonstrates you are moving forward seriously.
• Propose a lockout agreement: Ask the seller to agree not to show the property to other buyers or accept other offers for 2–4 weeks. Many sellers will agree if they trust you are moving fast. This is not legally binding but signals shared intent.
• Push toward exchange as fast as possible: The faster you get to exchange, the safer you are. A responsive solicitor, quick survey completion, and fast mortgage approval all reduce the gazumping window.
• Stay in communication with the seller's agent: Regular contact about your progress shows commitment and makes gazumping less likely. Silence and delays invite doubt.

What sellers should consider

As a seller, you have the right to gazump—but there are reasons to think carefully before exercising it.

The financial case for gazumping: If your first buyer offers £300,000 and a second buyer offers £320,000, the extra £20,000 is tempting. The difference matters, especially in today's market.

The risks of gazumping:

• The original buyer may sue you for costs (though unlikely to recover much).
• Your reputation among local agents suffers if you are seen as unreliable.
• The new buyer may be less committed—you could face another gazump or a late withdrawal.
• Your agent may lose trust in you, affecting future instructions.
• The market could move against you, and neither buyer may proceed.

A better approach: Rather than gazump after accepting an offer, price your property accurately from day one. If you price below market value, you invite gazumping. If you price accurately, you get serious offers from committed buyers.

If you receive a competing offer: You can ask your first buyer if they will increase their offer to match. Most committed buyers will do so to protect the sale. This is not gazumping—it is negotiation. The original buyer has the choice to match or walk.

Frequently asked questions

Related guides

• How long does it take to sell a house in the UK?
• What happens after you accept an offer on your house?
• How to negotiate estate agent fees in the UK

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