A flat can look identical to the one sold last year, be in the same street and have the same view, yet attract a lower offer for one reason: its lease has become shorter. If you are concerned about a leasehold flat value dropping because of a short lease, the issue is not simply the years lost. It is the growing cost, lending difficulty and buyer uncertainty attached to those years.
For many owners, the change feels sudden. In reality, lease length affects value gradually at first, then more sharply as key thresholds approach. The most widely recognised is 80 years remaining. Waiting until that point has passed can make a lease extension materially more expensive and can narrow the pool of people willing or able to buy.
Why a short lease reduces a flat’s value
A leasehold flat is a time-limited interest in a property. As the remaining term falls, the buyer is purchasing fewer years of ownership and taking on a future obligation to extend the lease. Their offer will usually reflect both the likely premium and the inconvenience, professional costs and risk of dealing with the process.
This does not mean every flat with a shorter lease is difficult to sell. Location, condition, price point, service charges and demand still matter. A desirable flat with 75 years remaining may sell well if it is priced sensibly. But it is unlikely to command the same value as a comparable flat with a long lease, all else being equal.
The effect can become more pronounced because buyers often make decisions with a mortgage lender in mind. A cash buyer may be comfortable taking on a lease extension. A buyer relying on lending may find their lender has minimum lease requirements at the start or end of the mortgage term. Requirements vary between lenders and products, but a shorter lease can reduce choice, delay a sale or lead to a lower valuation.
The 80-year point: why it changes the calculation
Under the current statutory framework, once a lease has fewer than 80 years remaining, a statutory lease extension premium can include marriage value. In simple terms, marriage value reflects part of the increase in the flat’s value created by extending the lease. That extra element is shared with the landlord when calculating the premium.
This is why owners are often advised to act before the lease drops below 80 years. The difference between extending at 81 years and 79 years can be significant, depending on the property value, ground rent and other valuation assumptions. There is no single figure that applies to every flat, so an accurate valuation is essential.
It is sensible not to treat 80 years as a finish line. A lease at 81 or 82 years can still concern a buyer who knows the threshold is close, particularly if they expect to own the flat for several years before extending. Acting with some headroom can protect your options rather than forcing a decision during a sale.
Leasehold reform is changing the wider landscape, and the Leasehold and Freehold Reform Act 2024 has set out major intended changes. However, commencement dates and the practical detail of implementation matter. Until a relevant change is fully in force, owners should make decisions using the law and costs that apply to their circumstances now, rather than assuming a future reform will automatically solve the problem.
Ground rent can add pressure
Lease length is not the only issue. A rising or doubling ground rent can affect lender appetite and buyer confidence, particularly where the terms are difficult to explain or review. The extension premium may also be influenced by the rent due under the existing lease.
A statutory extension for a qualifying flat owner currently adds 90 years to the remaining term and reduces ground rent to a peppercorn. That can make the flat simpler to finance, sell and hold over the long term. A negotiated extension may also be possible, but its terms should be assessed carefully: a longer lease is not automatically a better deal if it includes an unfavourable ground rent or other provisions.
How buyers price a leasehold flat with a short lease
Buyers do not all approach short leases in the same way. An experienced investor may obtain advice, calculate the likely premium and make an offer accordingly. An owner-occupier may be put off by the prospect of a legal and valuation process, especially after the expense of moving. Others may simply be unable to obtain a mortgage on acceptable terms.
In practice, a buyer is likely to allow for four things: the estimated extension premium, valuation and legal fees, the time involved, and a contingency for uncertainty. That is why a seller cannot always expect the sale price to fall only by the exact cost of extending the lease. The buyer is also taking on hassle and risk.
There is a further timing point. A buyer who has not owned the flat for the required period may be unable to start a statutory claim immediately. In many sales, the seller can serve the relevant statutory notice and assign the benefit of that claim to the purchaser on completion, provided the process is handled correctly. This can make the flat more marketable, but it needs to be planned with specialist legal advice well before exchange.
Should you extend before selling?
There is no automatic answer. Extending before marketing can make sense where the lease is near or below 80 years, where lender restrictions are likely to limit interest, or where you want the cleanest possible sale. A long lease gives buyers more certainty and removes a major negotiating point.
On the other hand, you may not have the funds or time to complete an extension before selling. In that case, pricing transparently and considering whether a statutory claim can be assigned may be the more practical route. The key is to understand the likely premium before deciding, rather than accepting a large reduction because the lease issue was left unexplained.
For a buy-to-let flat, the decision may also depend on investment plans. If you expect to hold for many years, extending early can help preserve future saleability and avoid a more expensive premium later. If you plan to sell soon, the value gained from extending needs to be weighed against the premium, fees and transaction timing.
Get the numbers before the pressure builds
A lease extension is a valuation-led transaction. The premium depends on the flat’s market value, years remaining, ground rent, lease terms and statutory assumptions. Online estimates may be useful for a rough sense check, but they cannot replace advice based on the actual lease and property.
A RICS-registered valuer can advise on a realistic premium range and help you understand the assumptions behind it. A solicitor experienced in leasehold work can confirm eligibility, review the lease, manage notices and protect the legal position. Coordinating these stages yourself can be time-consuming, particularly where a landlord, managing agent or multiple advisers are involved.
Lease Plus 90 provides a managed route for leaseholders and landlords who want clearer control over the extension process, including access to approved RICS-registered valuers where relevant. The aim is not to make a technical matter sound simple when it is not, but to make the next step clear and keep unnecessary administration out of the way.
Practical signs it is time to act
You should consider taking advice now if your lease is approaching 82 years, already below 80 years, or you are considering selling or remortgaging within the next few years. It is also worth acting sooner if the ground rent terms are escalating, a buyer has raised lease concerns, or you are receiving inconsistent information about what an extension may cost.
Do not rely solely on the number of years shown in an estate agent’s listing. Check the registered lease and calculate the unexpired term accurately. Small differences in timing can matter, especially around the 80-year threshold.
A short lease does not make a flat unsellable, and it does not automatically mean you should rush into the first offer or agreement presented. But the value issue rarely improves by being ignored. Getting a sound valuation and a clear route forward while you still have choices is often the most effective way to protect both the flat’s value and your negotiating position.
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