You have found a flat you can afford. The mortgage looks achievable, but the lease has around 80–90 years remaining. You intend to extend it after buying.
There is one question you cannot quite answer: what happens if your mortgage deal ends before the lease extension is complete?
That concern appeared in a HousingUK discussion about short leases and remortgaging. First-time buyers considering former council flats in London said they were looking at a mortgage with a 5% deposit. They understood that a lease extension would be needed, but worried about their borrowing options if it had not been completed within two years.
They also wondered whether waiting until they had a 10% deposit would improve the position. The account describes a purchasing decision, not a completed purchase or a mortgage refusal. No eventual outcome is provided in the account discussed here.
Their question deserves attention before exchange: obtaining a mortgage to buy the flat does not guarantee the same choice of mortgages later.
Your mortgage deal ending does not necessarily mean changing lender
The buyers assumed that remortgaging after two years would be inevitable. That needs qualification.
A mortgage’s introductory rate period and its overall repayment term are different things. When an introductory deal ends, the mortgage does not ordinarily become repayable in full simply for that reason.
The borrower may be able to take another deal with the existing lender, known as a product transfer, or remortgage to another lender. Without a new arrangement, the rate may move to the lender’s standard variable rate. MoneyHelper explains these options.
A product transfer and a new lender’s mortgage application can involve different processes. Ask your mortgage adviser about the particular lender’s arrangements, eligibility and restrictions. Do not assume either that you must change lender or that an attractive existing-customer deal will always be available.
“Between 80 and 90 years” is not precise enough
For an initial property search, a broad range may be useful. For a purchasing decision, you need the exact unexpired term.
A lease with 80 years remaining today would have approximately 78 years left two years later. One with 90 years would have approximately 88. These are arithmetic illustrations, not lending thresholds.
The relevant questions include:
- How much of the lease will remain at purchase completion?
- What mortgage term are you requesting?
- What does the proposed lender require?
- What would the remaining lease term be when you next expect to review your mortgage?
- What is your plan if an extension has not completed by then?
Lenders’ requirements differ. Some address the remaining lease at the start of the mortgage, the period remaining at its end, or both. A mortgage offer from one lender cannot establish what another lender will accept in two years.
Valuation and mortgage eligibility are separate questions
The Reddit poster asked how a shorter lease might affect the valuation at remortgage.
There is no reliable percentage deduction that can be applied to every flat. The property, local market, lease terms and extension prospects need to be considered. The Leasehold Advisory Service’s guidance for buyers explains why the remaining term matters to value and mortgageability.
A property might satisfy a lender’s lease-length requirement but receive a valuation that changes the borrowing calculation. Alternatively, its value might be acceptable while the lease fails that lender’s criteria.
Illustration: a £380,000 mortgage against a £400,000 property represents 95% loan-to-value. If, at a later mortgage application, the outstanding balance were £370,000 and the valuation were £380,000, the ratio would be approximately 97.4%.
Those figures are hypothetical. They show why repayments alone do not determine future loan-to-value. They do not predict a valuation fall, attribute one to lease length or establish which mortgage products would be available.
Would a 10% deposit solve the lease problem?
A larger deposit changes the initial borrowing calculation. It does not add years to the lease or remove the need to investigate an extension.
Buyers should consider their deposit and extension budget together. Putting more savings into the purchase may leave less available for the premium, professional fees and other ownership costs.
The comparison should therefore include more than another six months’ rent. Ask your advisers to help you consider the purchase price, mortgage costs, extension funding and the consequences of delay.
Neither “buy now with 5%” nor “wait until you have 10%” is a universal answer.
Turn “we will extend later” into a practical plan
Before committing, establish the available extension route, a professionally informed budget and how the work would be funded.
The Leasehold Advisory Service’s introduction to extending a flat’s lease distinguishes the formal statutory process from negotiating directly with the landlord. An extension normally requires legal and valuation advice.
Ask your solicitor and specialist valuer:
- What route is available for this particular flat?
- What costs should we budget for beyond the premium?
- Could an extension be addressed as part of the purchase?
- What could delay completion, and what would that mean for our plans?
- If we cannot complete the extension before our mortgage deal ends, what alternatives should we investigate?
Rules and valuation arrangements are subject to reform. Do not build the purchase budget around an assumption that a proposed change will be available by a particular date. Our separate article, Short Lease: Extend Now or Wait for Reform?, examines that timing question.
What should the purchase advice explain?
The buyer needs to understand more than the number printed in the lease.
The legal advice should address the significance of the remaining term in the circumstances of the purchase. The mortgage adviser assesses borrowing options; a specialist valuer advises on valuation and the extension premium. Those roles should be clear.
Tell your advisers if your plan depends on refinancing in two years, borrowing more to fund an extension or selling within a short period. An assumption left unspoken may never be tested.
For conveyancers, the practical lesson is to record the client’s plans and explain material limitations clearly. A lender accepting the security today does not answer every question about the buyer’s future ownership.
The seller can face a different difficulty: a buyer withdrawing before any lender refusal has been established. Our case study, Our Flat Has 91 Years Left on the Lease. Why Did the Buyer Pull Out?, examines the distinction between buyer concerns, mortgage requirements and the terms of an extension offer.
Already bought and now facing a short-lease problem?
The position is different if you already own the flat and have only now discovered that its lease affects your sale or remortgage.
Your original lease, Report on Title, mortgage papers and correspondence may help establish what was explained about the remaining term, extending and future mortgageability. The fact that the lease has shortened does not, by itself, establish that the original advice was wrong.
Our short-lease purchase advice collection brings together related articles.
Your lease is now a mortgage problem. What were you told when you bought?
If you already own the property and a short lease is affecting your sale or remortgage, visit When I Bought to explore the purchase records and advice that may matter.
Tell us when you bought, what has happened and what you remember being told. You do not need to decide whether anyone was at fault before starting a conversation.
Already own a short-lease flat? Tell us what happened →
An initial conversation. No report to buy. No claim to start.
This article concerns flats in England. It provides general information, not a mortgage recommendation, property valuation or estimate of a lease extension premium. Check the current position for the particular property and transaction.