selling

Extend the lease first or sell a flat with a short lease? The options compared

Selling a flat with a short lease: extend before you sell, sell as it is, or let the buyer deal with it.

4 min read
Last reviewed 4 November 2026
By Your Property Check team

Part 1 of 6

What counts as a short lease

General information, not advice. A leasehold flat is owned for a fixed period. GOV.UK says "You only own a leasehold property for a fixed period of time" and that ownership returns to the landlord when the lease ends. There is no single legal line that makes a lease "short". The figure GOV.UK gives is 80 years: it says that when there are 80 years or less remaining on your lease, the cost of extending it increases significantly. Citizens Advice tells buyers to check that the lease length is acceptable to the mortgage lender, but it gives no minimum number, and lenders set their own rules. So treat 80 years as a point where the price of fixing the problem rises, not as a rule that every lender applies. We read these pages on 4 November 2026.

Part 2 of 6

The three routes compared

Route	Who pays	Effect on a sale	Source
Extend the lease before selling	The seller pays to extend	The buyer sees a longer lease, so the lender question is easier to answer	GOV.UK: Extending, changing or ending a lease
Sell as it is, with the price reflecting the short lease	The seller accepts a lower price	The buyer must be able to get a mortgage or pay cash, and will take on the extension cost	Citizens Advice: Buying a home
Agree terms so the buyer deals with the extension	Agreed in the sale, usually through the price	Needs the right paperwork and a solicitor on both sides	Ask your conveyancer

GOV.UK says you can ask your landlord to extend at any time, and that you might be able to extend by 90 years for a flat if you qualify. The page does not list the conditions for qualifying, so ask LEASE, the Leasehold Advisory Service, or a solicitor who knows leasehold work before you rely on it. The GOV.UK page we read also does not describe the changes made by the Leasehold and Freehold Reform Act 2024, so check with LEASE which of those rules are in force for your claim before you plan around any of them.

Part 3 of 6

Extend first: what to weigh

Extending before you list gives the buyer a lease that is long enough to satisfy most lenders, and it removes a worry that can make buyers walk away. The trade-off is that you pay the cost and the time before you know your sale price. GOV.UK points to the LEASE lease extension calculator as a guide to the cost of extending a flat lease. We do not quote a premium, because the figure depends on the flat, the ground rent and the lease, and no official page gives a typical amount.

Ground rent also matters here. GOV.UK says leases granted on or after 30 June 2022 can usually be charged no more than a peppercorn ground rent, which is worth nothing. An older lease keeps the ground rent written into it. Our guide to ground rent and peppercorn rent explains what that means when you sell.

Part 4 of 6

Sell as it is: what to weigh

Selling without extending avoids the upfront cost and delay, and the buyer may price in the extension. The risk is a smaller pool of buyers, since some will need a mortgage and the lender has to accept the lease. Cash buyers do not depend on a lender, but they will still take the remaining term into account. Be ready to give the buyer's solicitor the lease, the ground rent and service charge details, and any fire safety paperwork. For a flat, our guide to the EWS1 form covers the external wall question that can arise at the same time.

Part 5 of 6

Can a buyer take over an extension?

This is a common question, and the GOV.UK pages we read do not answer it. Whether a buyer can take over a claim you have already started depends on the stage of the claim and the law at the time, so ask your solicitor before you promise it to anyone. Do not assume it works.

Part 6 of 6

What to do first

Find your lease and check the years remaining and the ground rent.
Ask a solicitor with leasehold experience, and read the LEASE guidance, before you contact the landlord.
Use the LEASE calculator to get a guide to the extension cost.
Decide whether to extend first or sell as it is, then tell your estate agent and solicitor.
Check freehold or leasehold status of your title so that the details you give a buyer match the Land Registry record.
Compare the routes on net proceeds and timescale with our sale method comparison.

A lease that has run out is a bigger problem. GOV.UK says that when a lease expires you do not automatically have to leave, but you will have fewer rights and legal protections, and it advises getting urgent advice if yours is about to run out.

This page is general information, not advice.

Our take

Decide on the lease before you decide on the price

There are three routes: extend first, sell as it is, or agree terms with the buyer. GOV.UK says the cost of extending rises significantly once 80 years or fewer remain, so we think a short lease should be dealt with early, with a leasehold solicitor, before you contact the landlord.

Whichever route you lean towards, compare what you would keep. Our sale method comparison sets auction, estate agent and cash buyer side by side on net proceeds and timescale. If you want a cash buyer to contact you, our cash buyer form is free to you with no obligation. We introduce, we do not buy.

Compare sale routes

Our opinion, drawn from the facts on this page: not advice and not a forecast. We earn from OfferCheck reports and from introducing sellers to cash buyers, so weigh it with that in mind (see our disclosure). We are not authorised or regulated by the FCA.

Questions, answered

Frequently asked questions

What counts as a short lease?

There is no single legal definition. GOV.UK says that once 80 years or fewer remain, the cost of extending increases significantly, so many people treat 80 years as the point to act.

Can a buyer get a mortgage on a short lease?

It depends on the lender. Citizens Advice tells buyers to check that the lease length is acceptable to the mortgage lender, and each lender sets its own rules, so ask a broker or the lender early.

Should I extend before I sell?

It can make the flat easier to sell, but you pay the cost before the sale and the time it takes. Selling as it is saves that cost but may reduce the pool of buyers. Take legal advice before you choose.

Can a buyer take over my extension claim?

The GOV.UK pages we read do not say. It depends on how far the claim has gone and the law at the time, so ask a solicitor before you promise a buyer anything.

How is the cost of a lease extension worked out?

The cost depends on the flat and its lease, and no official page we read gives a typical figure. GOV.UK points to the LEASE lease extension calculator for a guide to the cost of extending a flat lease.

Where this comes from

Sources

Last reviewed 4 November 2026 by the Your Property Check team. This page is general information, not legal, tax or financial advice. For your own situation, speak to a conveyancing solicitor or another qualified professional.