Gazumping is when a seller accepts your offer on a property and then accepts a higher offer from a different buyer before contracts are exchanged — leaving you without the property, having potentially spent money on surveys, searches, and legal fees.
It is legal in England and Wales. Unlike Scotland, where missives are legally binding much earlier in the process, the English system does not create a legal obligation on either party until exchange of contracts. In the intervening weeks or months between offer acceptance and exchange, either party can walk away without legal penalty — and sellers can accept a better offer from a third party.
Gazumping is most common in rising markets where competition for properties is high. In London, where demand consistently exceeds supply in most areas, the risk is meaningful and worth preparing for.
How Gazumping Happens
After an offer is accepted, the property is listed as Sold Subject to Contract (SSTC). This signals to the market that the property is under offer — but it is not a legal commitment. Estate agents are legally obliged to pass on any subsequent offers to the seller. If a higher offer arrives, the seller can accept it.
The new buyer may offer more money, may be in a stronger position (chain-free, cash buyer, faster completion timeline), or may simply make a more attractive overall package. The original buyer is then typically given the option to increase their offer or withdraw.
Gazumping is distinct from:
- Gazundering — where the buyer reduces their offer immediately before exchange, exploiting the seller’s commitment to the transaction at that late stage
- Gazzanging — where the seller withdraws entirely, usually to take the property off the market or to rent instead
- Gazzoping — where the buyer withdraws after the seller has turned down other offers
All of these are legal under the English system. None are consequences of dishonest behaviour — they are structural features of a system where no binding commitment exists until exchange.
Why England Has Not Reformed This
Property law reform in England has been discussed repeatedly over the decades. The Law Commission and various government consultations have considered making pre-exchange agreements more binding. None have produced legislative change.
The counter-argument to making the system more rigid is that it provides flexibility that benefits both parties. A buyer who discovers a serious structural defect after offer acceptance can walk away without penalty. A seller whose circumstances change — redundancy, death in the family, relationship breakdown — is not legally trapped. The absence of binding pre-exchange commitment protects both sides, with gazumping as the cost.
In Scotland, the system works differently. Once a formal offer is made and accepted in writing through solicitors (missives), it is binding. Scottish buyers and sellers have greater security earlier in the process, but less flexibility to exit once agreed.
How Common Is Gazumping?
Reliable recent data is limited, but industry surveys consistently suggest that gazumping affects between 10% and 30% of property transactions in active markets. In London and the South East, where competitive bidding on desirable properties is common and the supply-demand imbalance is most acute, the risk is higher than in slower regional markets.
The risk rises in:
- Fast-moving markets where prices are rising and demand is strong
- Properties with multiple viewings and competing interest
- Transactions that take longer than average to reach exchange — the longer the window between offer and exchange, the more time another buyer has to emerge
- Cases where the buyer is in a chain that is moving slowly
Practical Steps That Reduce the Risk
Gazumping cannot be fully prevented under the current legal framework, but its probability can be reduced meaningfully.
Move as fast as possible to exchange. The window during which gazumping can occur is the period between offer acceptance and exchange. Compressing that window — by instructing a conveyancer immediately, applying for the mortgage promptly, commissioning a survey without delay, and chasing each stage of the process proactively — reduces the exposure time. A buyer who reaches exchange in eight weeks is gazumped far less often than one who drifts to sixteen.
Get the property taken off the market. Ask the seller to remove the property from estate agent listings and online portals once your offer is accepted. Sellers are not legally required to agree, but many will if the relationship is constructive. A property that disappears from Rightmove and Zoopla after your offer is accepted generates no further viewings and far fewer competing offers.
Lock-in agreements. Some estate agents offer lock-in agreements — informal commitments by the seller not to accept alternative offers for a defined period. These are not legally binding under English law, but they create a moral and reputational obligation that most sellers and agents will honour unless a genuinely compelling offer arrives.
Exclusivity agreements. A more formal version of the lock-in, typically for a defined period (commonly 28 days), during which the seller commits not to negotiate with any other buyer. These can be drafted by a solicitor and while not foolproof under English law, they are more robust than an informal agreement.
Buyer’s premium or reservation fee. Some developers and a growing number of private sellers are adopting reservation fee models, where the buyer pays a non-refundable (or partially refundable) deposit to secure exclusivity before the full conveyancing process begins. The fee is typically £500 to £2,000 and is forfeited by the buyer if they withdraw without legitimate reason, but compensated to the buyer if the seller withdraws. This is still relatively rare in the secondary market.
Build a good relationship with the seller. Many cases of gazumping involve sellers who feel disconnected from the original buyer — particularly in transactions handled entirely through agents with no direct communication. A seller who has met you, understands your circumstances, and has goodwill toward you is less likely to accept a nominally higher offer if doing so means letting you down. This is not a guarantee, but it is a real factor.
If You Are Gazumped: What Are Your Options?
If the seller tells you they have received a higher offer and you are at risk of being gazumped, you have several options.
Increase your offer. If the property is genuinely worth more to you and the competing offer is real, you can match or exceed it. Ask the estate agent to confirm the competing offer exists and its approximate level before deciding whether to increase.
Offer a faster or cleaner exchange. Sometimes a competing offer wins not on price but on certainty. If you can offer exchange within a shorter defined period — two weeks, for example, rather than an open timeline — the seller may choose certainty over a marginally higher price.
Challenge the agent. Estate agents have a professional obligation under the Estate Agents Act 1979 to act in the seller’s best interests. If you believe the gazumping was engineered by the agent to generate a second commission from a different buyer, or to exploit a higher fee from a second transaction, you can raise a formal complaint with The Property Ombudsman.
Walk away. If the increase required to stay competitive is beyond what the property is worth to you, the most rational response is to withdraw and redirect your efforts. The money spent on surveys and legal fees is painful to lose — but committing to overpaying for a property at a level you are uncomfortable with to avoid losing it is a worse outcome.
For guidance on the English property transaction process and buyer rights, check: GOV.UK — buying a home
For the Property Ombudsman and complaints about estate agent conduct, check: The Property Ombudsman
Conclusion
Gazumping is an unpleasant but legal feature of the English property system, stemming directly from the absence of binding pre-exchange commitments. It is most common in competitive markets and on desirable properties where competing interest continues after an offer is accepted.
The most effective protection is speed — compressing the gap between offer and exchange as aggressively as possible — combined with a request that the property is taken off the market and, where possible, an exclusivity agreement. None of these guarantee protection, but together they materially reduce the window and the incentive for a seller to accept an alternative offer.
Frequently Asked Questions
Is gazumping legal in the UK?
Gazumping is legal in England and Wales, where no binding legal commitment exists until exchange of contracts. Either party can withdraw or a seller can accept a higher offer at any point before exchange without legal penalty. In Scotland, the system is different — once formal offers are exchanged through solicitors (missives), the agreement is legally binding.
Can you get your money back if you are gazumped?
You cannot recover survey, legal, or search costs from the seller if you are gazumped — these are unrecoverable sunk costs. Some buyers purchase Home Buyer Protection Insurance (typically £50 to £100) before incurring these costs, which reimburses survey and legal fees if the purchase falls through for reasons outside the buyer’s control, including gazumping.
How do I stop a seller from accepting another offer?
You cannot legally prevent a seller from accepting another offer before exchange. You can reduce the risk by asking them to take the property off the market, moving quickly toward exchange, and where possible agreeing a formal exclusivity arrangement with your solicitor. None of these are legally binding guarantees, but they significantly reduce the probability of a competing offer emerging.
What is the difference between gazumping and gazundering?
Gazumping is when the seller accepts a higher offer from a different buyer after already accepting yours. Gazundering is the opposite — when the buyer reduces their offer immediately before exchange, exploiting the seller’s sunk costs and time pressure. Both are legal under the English system.
