Process and Steps
What to Do When You Receive an Offer on a Leasehold Flat
A practical guide to assessing the buyer, protecting your position and avoiding renegotiation between offer and exchange.
An Accepted Offer Is Not Legally Binding
An offer on a leasehold flat is encouraging, but in England and Wales it is not the finish line. Until contracts are exchanged, the agreement is treated as "subject to contract": either side can usually walk away without legal penalty, and the buyer's solicitor still has weeks of legal work to carry out before the sale becomes binding. That work includes enquiries, searches, title review, mortgage-related checks and, for a leasehold flat, a substantial review of the lease, the service charge accounts, the ground rent terms and the building safety information.
This matters because the question at the offer stage is not only "is the price good?". It is "is this buyer likely to still proceed at this price once their solicitor, surveyor and lender have looked at the flat?" A slightly lower offer from a "proceedable" buyer (one whose funding, solicitor and chain position are already in place) is often a stronger choice than a higher offer from a buyer who still has a lot to arrange, because the higher offer is more likely to stall, fall through or come back lower after the survey.
This guide covers the practical decisions a flat seller faces between offer and exchange: how to assess the buyer, what still has to happen on the buyer's side, how leasehold issues can drive renegotiation, when to take the flat off the market, what to put in place to keep the sale on track and the moment it actually becomes binding.
How to Assess the Buyer
An attractive offer gets the seller's attention, but the buyer's actual position decides whether the sale completes. Before accepting an offer, it's worth running through a proper buyer assessment. The points below cover the practical questions to ask, ending with a look at the warning signs that often point to a later renegotiation or fall-through.
1. Cash buyer or mortgage buyer
The simplest question, and the one most often answered loosely. A genuine cash buyer holds the funds in their own name, is not waiting on the sale of another property and is not relying on a finance arrangement that has not yet completed. Anything else is, in practice, a mortgage or chain-dependent buyer, even if the agent describes them as cash. The distinction matters: a true cash buyer can move at the speed of their solicitor, while a mortgage buyer moves at the speed of the lender's underwriting and any leasehold-specific checks.
2. Mortgage agreement in principle: what it tells you and what it does not
A mortgage agreement in principle (AIP) is a lender's preliminary indication that, based on the buyer's stated income and a soft credit check, it would be willing to lend an amount in the region quoted. It is not a binding mortgage offer. The full offer is only made after a property valuation, full underwriting and any additional checks specific to the flat. For a leasehold flat those additional checks are typically more thorough and can change the lender's answer late in the process. An AIP is reassuring, but it is not a guarantee.
3. When your buyer has a property to sell (so they're in a chain)
A buyer who has their own property to sell can only move at the pace of their own sale. Useful questions: is their property already under offer, is their own buyer cash or mortgage-funded and how long has their own sale been running? A buyer whose own sale is two months in with a clear chain is usefully different from a buyer who has just listed and is making offers in parallel. End-of-chain buyers (no onward sale of their own) are often the most reliable; long chains carry the most fall-through risk.
First-time buyers sit in a useful position: they have nothing to sell, so there is no chain at all on their side. The trade-off is that this is their first purchase, so they tend to ask more questions, take longer over decisions and lean more heavily on their solicitor and lender than experienced buyers. A first-time buyer can be the most nervous person in the deal, and may need a little more reassurance from the agent and the seller to keep things moving.
4. Solicitor instructed
A buyer who has instructed a solicitor before making the offer, or who instructs one within a few days of acceptance, is signalling commitment. A buyer who is still "thinking about" who to use after two weeks is signalling the opposite. Ask your solicitor whether they have been in contact with the buyer's solicitor and how that has gone. How well the two firms are working together is one of the best early reads on the buyer's actual position. A responsive buyer's solicitor who is asking the right questions usually means a buyer who is moving; a solicitor who goes quiet for a week or two usually means the opposite.
5. Proof of funds and ID
Estate agents are required by law to carry out anti-money-laundering (AML) checks on buyers under the Money Laundering Regulations 2017. That includes confirming the buyer's identity and the source of their funds. A buyer who is slow to provide ID or who pushes back on proof of funds is creating a problem the agent needs to resolve before the sale can move forward. A reluctant buyer at this stage is sometimes a buyer with funding that is not yet in place.
6. Why a lower offer from a proceedable buyer can be the better deal
You'll see this play out regularly. Two offers arrive within days of each other, one a few thousand pounds higher than the other. The higher offer comes from a buyer with conditions attached: a property of their own to sell, no AIP yet, no solicitor instructed. The lower offer comes from a chain-free buyer with a confirmed AIP and a solicitor already on file. In practice, the lower offer is often the better deal. The sale tends to move faster and finish cleaner, and the final completion price typically lands within a few per cent of the higher offer once any later renegotiation is factored in.
7. Warning signs that often predict renegotiation
Some patterns of buyer behaviour are worth taking seriously, particularly in the first two or three weeks after acceptance. Vague proof of funds; a high offer made very quickly without any sensible questions; "cash" claims that turn out to depend on another sale or finance; slow solicitor instruction; no survey booked; an unclear chain position; repeated requests for more time on basic next steps. None of these are automatically a dealbreaker, but a buyer showing two or three of them at once usually has a position that will need closer management, and is more likely to come back later with a price reduction request.
The Steps Between Offer and Exchange
Once you have accepted an offer, the buyer's side has a long list of work to get through before contracts can be exchanged. Most of these tasks run in parallel rather than one after another, but a leasehold flat involves several extra layers of checking that a freehold house does not. This is the main reason leasehold sales typically take longer than freehold ones. For a typical sale, the buyer's side will need to:
- Apply for or finalise the mortgage, including a property valuation by the lender's surveyor.
- Instruct a buyer's surveyor for any independent survey (a RICS Home Survey at Level 2 or Level 3, formerly known as the HomeBuyer Report or Building Survey).
- Instruct their conveyancing solicitor and complete client ID and AML checks.
- Review the lease in full, including ground rent clauses, service charge arrangements, alteration covenants, letting and pet restrictions and the term remaining.
- Review three years of service charge accounts and any reserve fund position.
- Raise legal enquiries with the seller's solicitor on anything in the lease, the LPE1 or the searches.
- Order and review the standard property searches (local authority, water and drainage, environmental, plus any specific to the building or the area).
- Review the LPE1 management pack and the freeholder's responses to leasehold-specific enquiries.
- Confirm the building's insurance arrangements satisfy their lender.
- Resolve any building safety issues, including EWS1 status (the External Wall System form, used by lenders to confirm the cladding position on flats in qualifying buildings) where the building is in scope.
- Check that any lender-specific conditions on lease term, ground rent or building safety are satisfied for this flat.
Until contracts are exchanged, either side can usually walk away. The GOV.UK website states the position plainly: the agreement to sell and buy becomes legally binding only at exchange of contracts.
How Leasehold Issues Drive Renegotiation Risk
A buyer rarely opens with their best offer and then leaves it there. The more common pattern is a strong opening figure, followed a few weeks later by a request to lower the price once the survey, the lease review or the lender's checks have turned something up. With a leasehold flat, there are simply more places for that "something" to come from than with a freehold house. The question worth asking is whether the buyer has been made aware of any issues or quirks the flat has. Putting that information in front of buyers early is one of the best ways to filter the ambitious-but-flaky offer from the realistic-but-well-informed one. A buyer who already knows about the short lease, the upcoming Section 20 works or the slow managing agent at offer stage is far more likely to still be there at exchange.
The leasehold checks the buyer will run
The buyer's solicitor starts with the lease itself: how long is left, what the ground rent looks like, whether it escalates over time, and whether there are clauses on letting, alterations, pets or particular uses that might catch out a buyer or their lender. Then the money side: service charge level, recent demands, any arrears, the reserve fund balance and any Section 20 major works on the horizon. Then the building: fire safety information, EWS1 status where applicable, and how responsive the freeholder and managing agent have been to enquiries. Finally, the relationships: any record of disputes between leaseholders, between leaseholders and the freeholder, or with neighbouring flats. Most of these sit in the LPE1 management pack; the rest come out of the buyer's solicitor's enquiries. Each one is a potential point of renegotiation if the answer does not come back as expected.
Why the lender often matters as much as the buyer
Behind every mortgage buyer sits a lender with its own criteria, and those criteria are not the same across the market. Each lender publishes its conveyancing requirements in the UK Finance Mortgage Lenders' Handbook (formerly the Council of Mortgage Lenders' Handbook, and still often called the CML Handbook by older solicitors). Part 2 of that handbook holds the lender-specific instructions, which can vary noticeably from one lender to another.
The points that most often catch leasehold flats out follow a few familiar themes. Lease term: most mainstream lenders set a minimum unexpired term at completion somewhere in the 70 to 90 year range, varying by lender and product. Ground rent: doubling clauses, escalation clauses tied to a benchmark or ground rents above a certain percentage of the property value can rule a flat out for some lenders. The building: unresolved fire safety questions, an outstanding EWS1, gaps in buildings insurance evidence. And the financial picture: large unexplained service charge demands, recent arrears or a reserve fund that does not stack up against upcoming major works. A cash buyer has more flexibility on all of this, but a sensible cash buyer still runs most of the same checks, because their onward sale (at some point in the future) will probably be to a mortgage-funded buyer.
Be honest with yourself about the offer
The seller usually knows the flat better than anyone else: the quirks, the small irritations, the things that have come up over the years. It is worth putting yourself in the buyer's shoes for a moment. Anything you know about the flat will eventually find its way out, either through the buyer's solicitor's enquiries or through the surveyor's report. Surfacing those points yourself, before the buyer's side does, tends to work better than letting them come to light during conveyancing.
It also helps to stay realistic about price. Estate agents often pitch a high valuation to win the instruction, and it is easy as a seller to get carried away by the headline figure. The asking price is the start of a long process, not the finish. A price that reflects the flat as it really is tends to attract the buyer who can see it through to exchange; a price set too high tends to bring in offers that come back lower at the survey or fall away altogether.
Sold Subject to Contract: When to Take Your Flat Off the Market
Once an offer is accepted, most agents will mark the listing "sold subject to contract" (SSTC) on Rightmove, Zoopla and the agent's own website. SSTC is a marketing convention rather than a legal status: it tells other prospective buyers that the property is under offer, but it does not commit either side. The decision to make is not whether to mark SSTC at all (that part is normal), but how quickly to take the listing fully off the market.
Leaving the listing visible on the portals as SSTC quietly does a lot of work. It signals to other prospective buyers that the flat is under offer and probably not worth enquiring about, though the occasional persistent enquiry will still come through. It also keeps the property technically on the market, which has a useful effect on the buyer you are engaged with: as far as they know, another keen buyer could come along and make a higher offer at any point, so they have an incentive to keep moving. Good agents use this gently as a negotiating position to keep the buyer on their toes, which is helpful for the seller.
Taking the listing off the portals altogether too quickly carries a real cost. If the sale falls through at week six and the listing has been hidden for a month, the agent has to rebuild buyer interest from scratch, often at a price reduction. The small pool of backup buyers who might have come forward as SSTC enquiries is also gone. Withdrawing the property from the market entirely the moment an offer is accepted is generally not the right move. The trade-off is that some buyers want a clearer signal of commitment from the seller before they spend on a survey and legal fees, but that is a request to consider rather than a default to grant.
Commitment signals worth asking for first
Before agreeing to take the listing fully off the portals, the practical request is for the buyer to demonstrate genuine commitment. A useful checklist:
- Solicitor formally instructed and contactable.
- Buyer's ID and AML checks completed with the agent.
- Mortgage broker or lender details provided in writing.
- Survey booked, with a date in the next two weeks.
- Standard property searches commissioned and paid for.
- Proof of funds supplied for any cash element.
- Target exchange and completion dates agreed in principle.
A buyer who delivers all seven of these commitments within two weeks of offer acceptance is signalling a serious intention to complete. A buyer who is still working through the first two at week four is signalling the opposite. Some agents will recommend keeping the flat visibly SSTC on the portals until two or three of these signals are in place, then removing it. Others will keep it visibly SSTC right up to exchange of contracts, so the listing stays "live" for the full conveyancing period.
Set Expectations Early and Get Your Paperwork Ready
Most leasehold sales that drag on don't stall because of one big problem. They stall because half a dozen small ones pile up over time: the lease takes an extra week to arrive, a bank statement goes missing, the survey is booked for the following month, the managing agent takes a fortnight to come back on a single enquiry. A little preparation at the start of the process cuts a lot of this out, and the two recommendations below tend to make the biggest difference.
Agree practical expectations on day one
Talking through a few practical points with the estate agent when you accept the offer is not legally binding in itself, but it saves a lot of confusion and wasted time later:
- Target exchange and completion dates.
- Whether the buyer will be paying cash or relying on a mortgage, and the lender if known.
- Whether the buyer expects to commission a RICS Home Survey (Level 2 or Level 3), and roughly when.
- Whether the buyer is relying on the sale of another property to free up the funds.
- Who is ordering the LPE1 management pack (in practice, the seller's solicitor) and when.
- How quickly enquiries from the buyer's solicitor will be answered by the seller's side, and vice versa.
None of this binds either side. However, it does mean all parties in the transaction are working to the same shape of the next 10 to 16 weeks, rather than each holding a different version of it.
Get the leasehold paperwork ready
Leasehold sales often stall because of missing documents. Gathering the following before the buyer's solicitor asks for them removes a fortnight from most timelines:
- A copy of the lease, which your conveyancing solicitor will normally order from HM Land Registry as one of the first jobs on the file (£7).
- Service charge statements for the last three years.
- Recent ground rent demands.
- The current buildings insurance schedule for the block.
- Any fire safety information for the building, including EWS1 where applicable.
- Management company or freeholder contact details.
- Any Section 20 notices issued or pending.
- Consents and certificates for any alterations carried out (FENSA for windows, electrical certificates, gas certificates).
- Share certificate, if the flat carries a share of freehold or a residents' management company share.
The buyer's conveyancer will usually raise enquiries about the title, the searches, the property and the transaction itself. Most of those enquiries map directly onto items in the list above. Having the answers ready in advance is one of the cleanest ways a seller can keep a leasehold sale on track.
Suggested wording when an offer arrives
Rather than accepting or rejecting an offer on the spot, a quick email to the estate agent is a worthwhile first step. Something along these lines:
"Thanks for letting me know about the offer. Before I decide whether to accept, please can you let me know the buyer's position:
- Are they buying with cash or a mortgage?
- Do they have a property to sell?
- Are they in a chain?
- Have they instructed a solicitor?
- Can they provide proof of funds or a mortgage agreement in principle?
As this is a leasehold flat, please also make sure the buyer is aware there will be leasehold information for their solicitor to review before exchange of contracts."
The wording is deliberately neutral. It does not commit to accepting; it asks the agent to put the buyer's position on the record before the seller does anything irreversible.
When the Sale Actually Becomes Binding
The sale of a leasehold flat in England and Wales becomes legally binding at exchange of contracts. At exchange, both sides have signed identical contracts, the contracts have been formally exchanged between the two solicitors, the buyer pays a deposit (typically 10% of the purchase price) to the seller's solicitor, and a completion date is fixed. From that moment, neither side can pull out without serious consequences. A buyer who withdraws after exchange normally forfeits the deposit; either side may also be liable for the other's losses on top.
Completion is a separate, later date. On completion, the balance of the purchase price moves from the buyer's solicitor to the seller's solicitor, the legal title transfers, the seller's mortgage (if any) is redeemed, and the keys are released to the buyer on the day. The buyer's solicitor will then register the transfer at HM Land Registry afterwards, typically within a few weeks for freehold and longer for leasehold. Most leasehold sales fix exchange and completion two to four weeks apart, although a "simultaneous exchange and completion" on the same day is also common where there is no chain.
The practical implication for the offer stage is that everything from acceptance up to exchange is provisional. Anything that looks like commitment before exchange (an accepted offer, a SSTC marker, a memorandum of sale, even a signed contract held by one solicitor) is part of the run-up, not the legal commitment itself. The Law of Property (Miscellaneous Provisions) Act 1989, section 2 sets the underlying rule: a contract for the sale of land must be in writing, must contain all the agreed terms and must be signed by both parties. Anything short of that does not yet bind anyone.
Relevant Legislation
Two pieces of law sit behind almost every offer-stage decision a flat seller makes.
The Digital Markets, Competition and Consumers Act 2024 (DMCC Act) came into force on 6 April 2025 and replaces the older Consumer Protection from Unfair Trading Regulations 2008 (CPRs) for property listings. The Act requires sellers and estate agents to disclose material information that would influence the average buyer's decision, including (for leasehold flats) the lease length, the ground rent, the current service charge, building safety information including EWS1 where applicable and any pending Section 20 major works. The Competition and Markets Authority (CMA) enforces the rules, and breaches can be civil or, in serious cases, criminal. The previous National Trading Standards Estate and Letting Agency Team (NTSELAT) Parts A, B and C guidance has been withdrawn from official channels. The practical effect at the offer stage is that a known issue should not be left for the buyer's solicitor to discover at conveyancing; surfacing it during the listing or at acceptance is now the legal default.
The Law of Property (Miscellaneous Provisions) Act 1989, section 2 sets the formal requirement for a contract for the sale of land to be in writing, contain all the agreed terms and be signed by both parties. This is the statutory basis for the "subject to contract" convention: until those formalities are met at exchange, no enforceable agreement exists between buyer and seller. Memoranda of sale, accepted offer letters and SSTC markers are all part of the run-up to that moment, not substitutes for it.
Further Reading
Two related guides cover the next stages of the process: choosing a conveyancing solicitor who can handle a leasehold flat sale properly, and what to do if the sale falls through despite all of the above.
Frequently Asked Questions
Not until contracts are exchanged. In England and Wales an accepted offer is "subject to contract", which means either side can usually walk away without legal penalty up until the moment exchange takes place. The position is different in Scotland, where the sale becomes binding once missives have been concluded between solicitors. The practical effect for a flat seller in England or Wales is that an accepted offer is the start of the legal process, not the end of it.
It means an offer has been accepted and the flat is being treated as off the open market, but no contract has been signed and no money has changed hands. Either side can still pull out at any point before exchange. The phrase is a long-standing convention rather than a piece of legislation; the legal backbone sits in section 2 of the Law of Property (Miscellaneous Provisions) Act 1989, which requires any contract for the sale of land to be in writing and signed by both parties.
There is no rule either way. Many sellers mark a flat "sold subject to contract" on accepting an offer, and that is reasonable. The point worth holding onto is that doing so does not legally commit the buyer. Before agreeing to take the listing fully off the portals, a sensible seller asks for clear signals of commitment first: solicitor instructed, ID and AML checks completed, mortgage broker or lender details provided, survey booked promptly and proof of funds supplied.
Ask for written proof. A recent bank statement showing the funds in the buyer's own account is the strongest evidence. A solicitor's letter confirming funds is held in the firm's client account is also acceptable. A buyer who claims to be a cash buyer but cannot show either is usually relying on the sale of another property, on a finance arrangement that has not yet completed or on family money that is yet to arrive. Those buyers are not strictly cash buyers and should be assessed accordingly.
A mortgage agreement in principle (AIP), sometimes called a decision in principle, is a lender's preliminary indication that, on the buyer's stated income and a soft credit check, it would be willing to lend an amount in the region quoted. It is not a binding mortgage offer. The lender's full offer is only made after a property valuation, full underwriting and any additional checks the lender requires for the specific flat. For leasehold flats those additional checks are typically more thorough and can change the lender's answer.
Yes, and they sometimes do. A renegotiation request after the survey or after the solicitor has reviewed the lease is most common where there is a real issue: a short lease, rising ground rent, planned major works under Section 20 of the Landlord and Tenant Act 1985, defective wording, or condition issues that the buyer has not seen at viewing. Whether to accept a reduction, hold firm or remarket depends on whether the underlying point is genuine and on whether the buyer is otherwise a strong proceeder.
The seller orders the LPE1 (Leasehold Property Enquiries form, the standard pack of management information completed by the freeholder or managing agent) through their conveyancing solicitor. The pack costs typically £200 to £400 and can take three to six weeks to come back, sometimes longer if the managing agent is slow or if there are arrears to resolve. Ordering the LPE1 at instruction stage rather than waiting for an offer can shorten the conveyancing window meaningfully.
For a smooth leasehold sale in 2026, typically 10 to 16 weeks from accepted offer to exchange. Cases with no chain, prompt managing-agent responses and no lease or building-safety issues can move faster. Cases involving a slow managing agent, missing alteration consents, an EWS1 question or a chain stretch frequently to 20 weeks or more. The single biggest variable is how quickly the LPE1 and other leasehold paperwork come back from the freeholder or managing agent.
Legally, until exchange of contracts neither side is bound, so accepting a higher offer is permitted. The practice is known as "gazumping" and is common in England and Wales, less so in Scotland because of the concluded-missives system. Whether to accept a second offer is a judgement call: a higher headline figure from a less-proceedable buyer can leave you worse off than holding the original price. The agent should put any second offer to you in writing with the full position of both buyers for comparison.
The sale becomes legally binding at exchange of contracts. At exchange, both sides have signed and exchanged final contracts, the deposit (typically 10% of the purchase price) is paid by the buyer to the seller's solicitor, and a completion date is fixed. Pulling out after exchange triggers significant compensation: the buyer normally forfeits the deposit, and either side may be liable for the other's losses on top. Completion is the separate later date when legal title transfers and keys are released.