Around 70% of conveyancing solicitors believe digitisation will change their role, yet a third say they aren’t ready for it. That gap between what’s coming and who’s prepared is exactly why pre-purchase agreements matter more now than they have in years. I’ve been watching the UK property market long enough to see the same pattern repeat: buyers rush in, skip the paperwork, and end up paying for it later. The government’s proposed reforms, which include mandatory upfront information from sellers, are meant to fix this, but they won’t be fully in place until at least 2026. Until then, you’re on your own to get the details right. Here’s what you actually need to know.
If you’re buying a house, the offer you make isn’t legally binding until contracts are exchanged. That’s a long stretch of uncertainty — and it’s where pre-purchase agreements come in. These aren’t just formalities. They’re the tools that protect your deposit, your timeline, and your sanity. I’ve seen too many buyers assume a handshake is enough. It isn’t. A clear understanding of what you’re agreeing to before you sign anything is the single best way to avoid a costly mistake.
What a pre-purchase agreement actually covers
The most important thing to understand is that an offer on a house isn’t a contract. It’s an expression of interest. Until you exchange contracts, either party can walk away without legal consequences. That’s why a pre-purchase agreement — sometimes called a lock-out agreement or a conditional contract — exists. It turns a verbal understanding into something enforceable. The key term here is exchange of contracts, which is the point at which the sale becomes legally binding. Before that, you’re in a grey area. A pre-purchase agreement pulls you out of that grey area by setting out what each side has agreed to do, and by when.
What I’d do in your shoes is treat the pre-purchase agreement as a checklist. Don’t just sign whatever the estate agent hands you. Go through it line by line with a solicitor. Make sure it covers the deposit amount, the deadline for exchange, what happens if the survey reveals major problems, and who pays for what if the deal falls through. A good agreement also names the property, the purchase price, and any conditions like mortgage approval or the sale of your current home. If any of those conditions aren’t met, you should have a clear exit route.
Why this matters more than you think
The UK government’s proposed reforms aim to reduce the number of failed transactions, which currently cost the industry an estimated £1.5 billion every year. That’s not just an industry problem — it’s your problem. If you’re in a chain and one buyer pulls out, everyone loses time, money, and momentum. A pre-purchase agreement doesn’t eliminate that risk, but it does make it harder for someone to walk away without consequence. It also forces both sides to be honest about what they can and can’t do. I’ve noticed that buyers who use these agreements tend to move faster and with fewer surprises, because the hard conversations happen early.
Consider a scenario where you’ve paid for a survey, a solicitor, and a mortgage application, only for the seller to accept a higher offer from someone else. Without a pre-purchase agreement, you have no legal recourse. You’re out the money and back to square one. A lock-out agreement, even a simple one, prevents the seller from negotiating with other buyers for a set period. That gives you the time to do your due diligence without competing against someone else. It’s a small piece of paper that can save you thousands.
Where people go wrong with pre-purchase agreements
The most common mistake I see is treating the agreement as a formality. Buyers sign it without reading it, assuming it’s standard. It isn’t. Every agreement is different, and the details matter. Here are the specific errors that come up again and again.
Not specifying what happens to the deposit
If you put down a deposit before exchange, you need to know exactly what happens to it if the sale falls through. Some agreements say the seller keeps it if you pull out. Others say it’s returned. A few don’t mention it at all, which leaves you in a legal grey area. Always get this in writing. If the seller insists on a non-refundable deposit, make sure you’re comfortable with the conditions that would trigger a forfeiture. A leasehold trap is one example of a hidden issue that could make you want to walk away — and you need to know whether your deposit comes with you.
Leaving out conditions on surveys and searches
Around 70% of conveyancing solicitors believe digitisation will change their role, but that doesn’t mean the basics are automated yet. You still need to make your offer conditional on a satisfactory survey and local authority searches. If you don’t, you could be legally committed to buying a house with structural problems or planning issues. I’d always include a clause that lets you withdraw if the survey reveals costs above a certain threshold — say, £5,000 in repairs. That way, you’re not forced to choose between a bad house and a broken agreement.
Ignoring the chain
If you’re in a chain, your pre-purchase agreement should reference the other transactions. The government’s reforms include proposals to give buyers and sellers the option to enter into a binding contract earlier in the process, but until that’s law, you need to protect yourself. Make the agreement conditional on the successful exchange of contracts in the rest of the chain. If one link breaks, you’re not stuck. This is especially important if you’re selling your current home to buy the next one. A downsizing dilemma can become a financial disaster if the timing doesn’t line up.
Not using a solicitor to draft or review the agreement
Estate agents sometimes provide template agreements. Don’t use them without a solicitor’s review. A template won’t account for your specific situation — the length of the chain, the type of property, the mortgage conditions. A solicitor will. The cost of a review is small compared to the cost of a dispute. If you don’t have a solicitor yet, you can speak to a property lawyer online to get the agreement checked before you sign.
→ Scroll right to see all columns
| Issue | What solicitors think | What it means for you |
|---|---|---|
| Digitisation of conveyancing | 70% expect it to change their role | Processes will speed up, but you still need a human to review your agreement |
| Early binding contracts | Most oppose estate agents encouraging them | Don’t rely on agents to push for a pre-purchase agreement — you have to ask |
| Upfront property information | Strong support for regulation of estate agents | More transparency is coming, but it’s not here yet — verify everything yourself |
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How to set up a pre-purchase agreement that actually works
A good pre-purchase agreement doesn’t have to be complicated, but it does have to be thorough. Here’s how to approach it step by step, with the key actions you need to take.
Instruct a solicitor before you make an offer
The government’s reforms encourage instructing a conveyancer earlier in the process, and for good reason. If you have a solicitor lined up before you make an offer, they can draft a pre-purchase agreement at the same time. That means you can present it to the seller alongside your offer, which shows you’re serious and organised. It also means the solicitor can flag any issues with the property or the chain before you commit. The real estate agent fees you’re paying should cover a professional handling of the paperwork — but the agreement itself is your responsibility.
Agree on the key terms in writing
Before you sign anything, sit down with the seller or their agent and agree on the following: the purchase price, the deposit amount and whether it’s refundable, the deadline for exchange of contracts, the conditions (survey, mortgage, chain), and what happens if either party pulls out. Write it all down. Email it to yourself and your solicitor. This isn’t the final agreement, but it’s the foundation. If the seller won’t put these things in writing, that’s a red flag.
Include a timeline with penalties
One of the biggest causes of failed transactions is delay. The government wants to see regulated search turnaround times drop from 6–10 weeks to a maximum of 3 weeks. You can do something similar in your agreement. Set a deadline for the survey, the searches, and the exchange of contracts. If either party misses a deadline, include a penalty — for example, the deposit becomes non-refundable, or the other party can walk away without penalty. This keeps everyone moving.
Use a lock-out clause to secure the property
A lock-out clause prevents the seller from negotiating with other buyers for a set period — typically 4 to 8 weeks. This is especially useful if you’re in a chain and need time to sell your current home. Without it, the seller can accept a higher offer at any point before exchange. A lock-out clause doesn’t guarantee the sale, but it gives you the time you need to complete your due diligence. If the seller refuses, ask yourself why. A motivated seller should be willing to take the property off the market for a reasonable period.
Get the final agreement reviewed by a solicitor
Once you’ve agreed on the terms, your solicitor should draft the final document. Don’t use a template from the internet. Every property transaction is different, and a generic agreement can miss important details. Your solicitor will check that the agreement is enforceable, that it complies with property law, and that it protects your interests. If you need a quick review, you can consult a real estate lawyer online to get it done without an in-person meeting.
- 1Instruct a solicitor before you make an offerHaving a solicitor ready means they can draft a pre-purchase agreement alongside your offer. This shows the seller you’re serious and gives you legal protection from day one.
- 2Agree on key terms in writingWrite down the purchase price, deposit terms, deadlines, conditions, and exit clauses. Email it to yourself and your solicitor. This becomes the foundation of the formal agreement.
- 3Include a timeline with penaltiesSet deadlines for the survey, searches, and exchange of contracts. Include a penalty for missed deadlines — like the deposit becoming non-refundable — to keep both sides accountable.
- 4Add a lock-out clauseThis prevents the seller from negotiating with other buyers for a set period. It gives you time to complete your due diligence without competing against someone else.
- 5Have a solicitor review the final agreementDon’t sign a template without professional review. A solicitor will check that the agreement is enforceable and that it protects your specific interests in the transaction.
Frequently asked questions about pre-purchase agreements
Can I back out of a pre-purchase agreement without penalty? ▾
Is a pre-purchase agreement the same as exchanging contracts? ▾
What happens if the seller refuses to sign a pre-purchase agreement? ▾
Do I need a solicitor to draft a pre-purchase agreement? Speak to an estate lawyer ▾
How long does a pre-purchase agreement last? ▾
The reforms coming in 2026 will change how property transactions work in the UK, but they won’t eliminate the need for careful agreements. If anything, they’ll make pre-purchase agreements more important, because buyers will have more information upfront and less time to act on it. My advice is to start treating every offer as a potential contract. Get the terms in writing, involve a solicitor early, and don’t assume good faith is enough. If this was useful, you might also want to read homeownership tax benefits when buying a house and lot.
Sources and Further Reading
Understanding housing loan eligibility for first-time buyers — A practical guide to what lenders look for and how to improve your chances of mortgage approval.
Home buying and selling reforms. The Law Society, 2026.
Buying a home: overview. UK Government, 2026.
Home Buying Reforms 2026: How Mandatory Upfront Surveys Will Transform Building and Valuation Practices. Nottingham Surveyors, 2026.
