If you own a leasehold flat in England or Wales, the length of your remaining lease is one of the most financially significant numbers attached to your property. A short lease does not just reduce your home's market value — it can make it effectively unsellable and unmortgageable. Understanding how to extend your lease, what it costs, and how the rules have changed under recent legislation is essential knowledge for any leaseholder.
Why Lease Length Matters So Much
A leasehold property comes with a fixed term — typically 99, 125, or 999 years when originally granted. Every year that passes reduces the remaining term. As the lease shortens, several problems emerge:
Below 80 years: This is where things begin to get seriously expensive. Once a lease drops below 80 years, the cost of extending it increases substantially because the freeholder becomes entitled to a share of the "marriage value" — the increase in property value created by extending the lease. This can add tens of thousands of pounds to the premium you must pay.
Below 70 years: Most high-street mortgage lenders will refuse to lend on a property with fewer than 70 years remaining on the lease, or require a specific minimum term at the end of the mortgage period (often the mortgage term plus 30 years). This dramatically reduces the pool of potential buyers when you come to sell.
Below 60 years: At this point, some cash buyers may also walk away, and the property may be difficult to insure on standard terms.
The message is simple: extend early, before you lose leverage.
Statutory vs. Informal Lease Extension
There are two routes to extending a lease:
The informal route involves negotiating directly with your freeholder outside the formal legal process. This can be faster and cheaper if the freeholder is cooperative and the terms are reasonable. However, there is no legal obligation on the freeholder to agree, and you have no right to challenge an unreasonable premium through the Tribunal on the informal route alone.
The statutory route is the formal legal process set out in the Leasehold Reform, Housing and Urban Development Act 1993, as amended. This gives qualifying leaseholders the legal right to extend their lease — regardless of whether the freeholder wants to cooperate. The freeholder cannot refuse; they can only negotiate the premium.
Under the statutory route, a successful lease extension grants you:
- 90 years added to your current remaining term (so if you have 75 years left, you get 165 years)
- Ground rent reduced to a peppercorn (effectively zero) for the extended term
The 2024 Leasehold and Freehold Reform Act has made important changes here — more on that below.
The Two-Year Qualifying Rule
To use the statutory route, you must have owned your leasehold property for at least two years from the date of registration at HM Land Registry. You cannot use the statutory process the day you complete on a purchase — though you can serve the initial notice in your second year, timing it to expire after the two-year period if necessary.
There is no qualifying period for the informal route, which is why some buyers negotiate an assignment of the previous owner's Section 42 notice rights as part of the conveyancing process.
The Section 42 Notice Process
The statutory route begins with you (through your solicitor) serving a Section 42 Notice on the freeholder. This formal document specifies:
- The property details
- The proposed premium you are willing to pay
- The proposed new terms (peppercorn ground rent, 90 years added)
The freeholder then has two months to serve a counter-notice (a Section 45 Notice), in which they either accept your proposed terms or set out alternative terms — typically a higher premium. If the parties cannot agree, either side may apply to the First-tier Tribunal (Property Chamber) to determine the fair market premium.
Typical timescales: The statutory process takes 6–12 months from service of the Section 42 Notice to completion, assuming reasonable cooperation from the freeholder. Contested cases that go to the Tribunal take longer — 12–18 months is not unusual.
What Does It Cost to Extend a Lease?
The total cost of a statutory lease extension on a typical flat in the UK comprises three elements:
The premium: The amount paid to the freeholder for the additional years and ground rent reduction. This is calculated using actuarial formulae based on the ground rent, the remaining term, the property's open market value, and the capitalisation rate. As a rough guide for a typical one-bedroom London flat with 75 years remaining:
| Scenario | Approximate Premium |
|---|---|
| 85 years remaining | £3,000–£8,000 |
| 75 years remaining | £8,000–£18,000 |
| 65 years remaining | £20,000–£40,000+ |
Outside London, premiums are generally lower due to lower underlying property values.
Legal fees: Your solicitor's fees for managing the Section 42 process, negotiating with the freeholder, and completing the new lease. Expect £1,500–£3,000 for a reasonably straightforward case. Note: you are also legally required to pay the freeholder's reasonable legal and surveyor costs, typically £1,000–£2,000 more.
Surveyor/valuation fees: A specialist leasehold valuation surveyor will assess the fair premium and negotiate on your behalf. Fees are typically £800–£1,500.
In total, budget £8,000–£20,000 for a typical statutory lease extension on a flat outside Central London. London premiums can be significantly higher.
The 2024 Leasehold and Freehold Reform Act
The Leasehold and Freehold Reform Act 2024 introduced important changes:
- Marriage value is to be abolished: Under the new legislation, marriage value — the element that dramatically increases premiums on sub-80-year leases — will no longer be payable. This has not yet come into force (secondary legislation is required), but when implemented it will reduce the cost of extending shorter leases substantially.
- Standardised valuation rates: The Act introduces prescribed capitalisation and deferment rates, making premiums more predictable and consistent.
- Extended right to a longer lease extension: The right to extend by 990 years (up from 90 years) is proposed, subject to commencement.
Many of these provisions require further secondary legislation to take effect. If you are considering extending your lease, take current legal advice, as the landscape is changing.
Get the Most from Your Leasehold Property
Extending your lease is one of the most impactful things you can do to protect and increase the value of your home. Do it before the 80-year threshold if at all possible.
Once the legal process is complete, Renovate Me can help you plan what to do with the property next. Start your free renovation roadmap at renovate-me.madethis.app — upload your photos, set your budget, and get a personalised plan for transforming your flat.