If you own a leasehold flat in Crawley or West Sussex — whether it's in the town centre, Three Bridges, or Pound Hill — the length of your remaining lease is one of the most important factors affecting your property's value and saleability. A Crawley Surveyors who specialises in lease extension valuations can help you understand your position and negotiate the best possible premium with your freeholder.
In this guide, I'll explain how leasehold works, when you should consider extending, what the process looks like, and crucially — how an RICS-regulated valuation protects your financial interests throughout.
Understanding Leasehold Property in the UK
When you buy a leasehold property, you're purchasing the right to occupy it for a fixed period — typically 99, 125, or 999 years from the original grant of the lease. You don't own the land or building itself; that remains with the freeholder (also called the landlord). Every year that passes, the remaining lease term reduces, and so does the value of your property.
Short leases are a serious issue. Once a lease falls below 80 years, the cost of extending it rises steeply — this is because a component called marriage value becomes payable to the freeholder. Marriage value represents the increase in the property's value that results from the lease extension itself, and below 80 years you must share 50% of this with the freeholder. This can add tens of thousands of pounds to the premium.
Most mortgage lenders will refuse to lend on a property with fewer than 70–75 years on the lease. So if you're planning to sell or remortgage, a short lease becomes a major obstacle — and one that buyers will use to negotiate a significantly lower price.
When Should You Think About Extending?
The answer is: earlier than you think. As a rule of thumb:
- If your lease has more than 90 years remaining, there's no immediate urgency — but it's worth monitoring annually.
- If your lease has 80–90 years remaining, you should seriously consider extending now, before marriage value begins to apply.
- If your lease has fewer than 80 years remaining, act promptly — every year of delay costs money.
- If your lease has fewer than 70 years, some mortgage lenders will refuse to lend, restricting your buyer pool and significantly reducing your sale price.
We frequently work with flat owners in Crawley who have discovered — often when trying to sell — that their lease is shorter than they thought. The costs and delays involved in extending at that point can be considerable. Addressing it proactively is always cheaper and less stressful.
Real Case Study — Crawley Town Centre Flat
A client came to us in 2025 having accepted an offer on their two-bedroom flat in central Crawley. During the conveyancing process, the buyer's solicitor flagged that the lease had 74 years remaining. The buyer's mortgage lender — Halifax — would only lend if the lease was extended to at least 85 years before completion. We carried out an RICS lease extension valuation and established the correct premium at £11,200. The freeholder's initial demand was £19,500. Following our report and negotiation support, the extension was agreed at £12,400 — saving our client over £7,000 and allowing the sale to proceed.
Your Statutory Right to Extend
Under the Leasehold Reform, Housing and Urban Development Act 1993 (as amended), most flat owners have a statutory right to extend their lease by 90 years on top of the remaining term, at a peppercorn (zero) ground rent. To qualify, you must:
- Have owned the property for at least two years
- Hold a long lease (originally granted for more than 21 years)
- The property must be a flat (houses have different rights under the 1967 Act)
The statutory route is more structured and protects your rights — but it can be slower and more expensive in legal fees than a voluntary (informal) extension agreed directly with your freeholder. An RICS surveyor can advise which approach is best suited to your circumstances.
How the Lease Extension Process Works
Whether you proceed via the statutory route or informally, the process broadly follows these steps:
- Obtain an RICS valuation: Before serving any formal notice or entering any negotiation, you need an independent valuation of the premium you should pay. This is the most important step — and it must be carried out by a qualified surveyor with specialist expertise in leasehold valuations.
- Serve a Section 42 Notice: If proceeding formally, your solicitor serves a formal notice on the freeholder. This notice must include your proposed premium, based on your valuation. Once served, it locks in the current lease term and prevents the freeholder from selling to another party without offering you the opportunity to match.
- Counter-notice from the freeholder: The freeholder has two months to respond, typically proposing a higher premium. This begins a negotiation period.
- Negotiation: The two parties (via their surveyors) negotiate the premium. In our experience, most cases settle without going to tribunal.
- Application to the First-tier Tribunal: If agreement cannot be reached, either party can apply to the Property Chamber of the First-tier Tribunal to determine the fair premium.
- Completion: Once the premium is agreed, the solicitors handle the legal documentation and registration. The extended lease is then registered at Land Registry.
What Does a Lease Extension Cost?
The total cost of a lease extension involves several components:
- The premium: The sum paid to the freeholder. This varies enormously depending on the property value, ground rent, and remaining lease term. For Crawley flats, premiums typically range from £5,000 to £30,000+.
- Your legal fees: Typically £1,500–£3,000 for a straightforward case.
- Your surveyor's fees: £700–£1,500 for a full RICS lease extension valuation and negotiation support.
- Freeholder's legal fees: You are usually required to pay the freeholder's reasonable legal and valuation costs as part of the statutory process — typically £1,000–£2,500.
- Land Registry fee: A nominal fee based on the property value.
While the costs are real, they are almost always dwarfed by the increase in property value that results from the extension. A flat in Crawley worth £200,000 on a 75-year lease might be worth £215,000–£225,000 on a 165-year lease — an increase of £15,000–£25,000 for a total outlay of perhaps £12,000–£18,000.
Why You Need an RICS Surveyor for the Valuation
Lease extension premiums are calculated using a complex actuarial formula that takes into account the current value of the property, the ground rent, the remaining lease term, and a deferment rate approved by the government. Getting this calculation wrong — either by undervaluing or overvaluing — has significant consequences.
If your Section 42 Notice includes a premium that is too low, the freeholder's solicitor may argue it is not a genuine proposal and reject the notice entirely. If you pay too much, you've simply handed money to the freeholder that should have stayed in your pocket. An RICS valuation — carried out by a surveyor who specialises in this area and understands local Crawley and West Sussex market values — is the only reliable way to establish the correct figure.
Leasehold Reform — What's Changing
The Leasehold and Freehold Reform Act 2024 brought significant changes to leasehold law in England and Wales, with further reforms expected. Key changes that flat owners should be aware of include:
- The two-year ownership requirement for statutory lease extension is being removed, allowing buyers to extend immediately upon purchase.
- Restrictions on ground rent charges in new leases — ground rents in existing leases may also be capped in future.
- Potential changes to the deferment rate and capitalisation rate used in premium calculations.
- Enhanced rights for leaseholders to challenge unreasonable service charges.
These are complex and evolving areas of law. We strongly recommend obtaining current professional advice before proceeding with any lease extension, as the applicable rules may have changed since this article was written.
Frequently Asked Questions
Can I extend my lease if I'm about to sell?
Yes — in fact, this is one of the most common situations we encounter. You can serve a Section 42 Notice before selling and assign the benefit of the notice to your buyer as part of the sale, allowing them to continue the process after completion. This is a common way to unlock a sale where the lease term is causing a problem. We can advise on the timing and structure.
How long does a lease extension take?
A formal statutory lease extension typically takes 6–12 months from start to completion. An informal (voluntary) extension agreed directly with the freeholder can be faster — sometimes 3–6 months — but offers fewer legal protections if negotiations break down.
What if the freeholder refuses to negotiate?
If you proceed via the statutory route, the freeholder cannot simply refuse — they are legally obliged to respond to a valid Section 42 Notice. If they fail to do so, or if agreement cannot be reached, the matter is referred to the First-tier Tribunal, which will determine the fair premium. Freeholders who unreasonably refuse to comply can face cost penalties.
Does a lease extension affect my ground rent?
A statutory lease extension sets the ground rent to a peppercorn (effectively zero) for the entire extended term. This is one of the major benefits of the statutory route over an informal extension, where some freeholders will attempt to maintain or increase the ground rent in the new terms.
How We Can Help
At Crawley Surveyors, our RICS-qualified valuers specialise in lease extension valuations across Crawley, Horley, Redhill, Horsham, East Grinstead and throughout West Sussex and Surrey. We provide:
- A formal RICS Red Book lease extension valuation report
- Advice on whether to proceed formally or informally
- Negotiation support with the freeholder's surveyor
- Representation at First-tier Tribunal if required
- Coordination with your solicitor throughout the process
If you're concerned about your lease length, or if you're planning to sell and want to understand your options, contact our team today for a no-obligation conversation. We can usually provide an initial indication of the likely premium range — and whether extending makes financial sense for your specific situation — without charge.
You may also find our guide to Red Book valuations helpful, as well as our overview of all our surveying services.