Lease Extensions Explained
If you've spent any time trying to understand lease extensions, you've probably ended up more confused than when you started. You're not alone. Here is everything you need to know.
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Three things every leaseholder should know
Your flat has an expiry date
In England and Wales, one person or company owns the land (the freehold), and everyone in the building gets a lease: a right to live in their flat for a set number of years.
Think of it as a prepaid rental contract. You've paid upfront for 125 years, but every day that passes, your lease gets shorter.
When the timer hits zero, the property goes back to whoever owns the land. Even if you've paid off your mortgage.
Harder to sell, harder to mortgage
A short lease limits what you can do with your property. Buyers walk away. Lenders refuse to lend.
Mortgage lenders start having issues around 90 years. By 50, almost no mainstream lender will touch it. A 75-year lease with a 30-year mortgage takes you to 45. Most lenders will say no.
Ground rent causes problems too. Lenders won't accept ground rent above about 0.1% of the property value, and are especially cautious about ground rent that doubles or is tied to RPI.
Fewer mortgages
The cost accelerates every year
As time passes, value moves from you to the freeholder. The losses compound, and they accelerate.
The day your lease drops below 80 years, Marriage Value kicks in. This is a cliff edge, not a slope. One day can mean tens of thousands more. Literally overnight.
You must share 50% of any value the extension creates with the freeholder. If extending adds £40,000, you owe them an extra £20,000 on top of the normal premium.
2-3x premium
How a lease extension protects you
A lease extension is your statutory right under the Leasehold Reform, Housing and Urban Development Act 1993. Your freeholder is required to extend your lease, they legally can't say no. It does two key things:
Added on top of whatever you have left.
If you have 60 years, you get 150.
Your ground rent is reduced to a peppercorn,
which in practice means you pay £0 a year.
Your property is worth more, easier to sell, and easier to mortgage.
Nearly all leaseholders who extend see an immediate uplift in value that far exceeds the cost.Worth more
Nearly all leaseholders who extend see an immediate uplift in value that far exceeds the cost.
Easier to sell
Buyers and their solicitors look at lease length first. A long lease removes a major barrier to sale.
Easier to mortgage
Lenders want a good security so look for long leases with zero ground rent. An extension gives them exactly that.
Your questions, answered
How much does a lease extension cost?
The cost depends on three main factors: how many years remain on your lease, your flat's current market value and how much ground rent you pay.
You usually pay three main costs:
- Your professional fees (valuation, negotiation and legal work)
- The freeholder's fees (which have to be reasonable)
- The premium, which is the payment to actually extend your lease
Most lease extensions cost between a few thousand and several tens of thousands of pounds. With Zero Down Lease, our Guaranteed Price gives you one fixed amount covering everything. No surprises, no hidden charges.
How is Zero Down Lease different?
We make lease extensions simple, clear and affordable. Most people need three separate companies to extend their lease. Not with us.
Our Guaranteed Price is one capped amount that includes valuation, legal work and the premium payment to your freeholder. If the final cost ends up higher than expected, we cover the difference. If it ends up lower, we share the savings with you.
You get complete peace of mind from day one. One price, one point of contact, one straightforward process. You can even pay for it once it is all done with our lease extension finance.
Am I eligible to extend my lease?
Most leaseholders have a legal right to extend their lease under the Leasehold Reform, Housing and Urban Development Act 1993.
You are usually eligible if:
- The original lease was for more than 21 years,
- The property is a flat or maisonette, and
- You are not in breach of your lease (for example, you do not owe money or have not made unapproved changes).
The two-year ownership requirement has been removed under recent reforms, so you can now extend as soon as you complete your purchase.
If you're unsure whether you qualify, we can check your lease and confirm your eligibility for free.
How is the lease extension premium calculated?
The premium is what you pay your freeholder to extend your lease. It's calculated using a formula set out in legislation and based on:
- How many years remain on your lease
- Your flat's current market value
- Your ground rent and how it changes
- Whether your lease is above or below 80 years (if below, Marriage Value applies)
A professional RICS-certified valuer determines the premium using the legal formula. This valuation forms the foundation for negotiations with your freeholder. Our valuers have saved clients over £1.5 million on premiums by ensuring robust, well-evidenced valuations.
Can I extend my lease if I have a mortgage?
Yes, having a mortgage doesn't prevent you from extending your lease.
For a statutory (formal) lease extension, you don't need your lender's permission to proceed. The process is protected by law.
For an informal extension, you will need a document from your lender called a Deed of Substituted Security. This confirms the mortgage will transfer to your new lease. This can add time and cost to the process.
What if I cannot afford to pay everything upfront?
This is one of the most common barriers leaseholders face. You know you need to extend, but finding tens of thousands of pounds isn't straightforward.
Zero Down Lease offers a solution: extend now and pay later. Our financing option allows you to complete your lease extension and pay us back when you sell or remortgage your property.
This breaks the "chicken and egg" problem where you can't sell because of a short lease but can't afford to extend because you haven't sold. Subject to eligibility, you can extend without the large upfront cost.
What is included in the deposit?
Your deposit to start the process with us covers:
- All of your professional fees (legal / negotiation etc) needed to start the lease extension
- Payment towards any payments requested by the landlord before the lease extension completes
This allows the process to start without you paying the full amount upfront. You know exactly what you're paying from day one, with no unexpected costs appearing later in the process.
How long does the lease extension process take?
Most lease extensions take between six and nine months. The timeline depends on how quickly your freeholder responds and how negotiations progress.
For statutory lease extensions, there's a legal framework with set deadlines:
- Your freeholder has two months to respond to your Section 42 notice
- You then have up to six months to negotiate before either party can apply to the First-tier Tribunal
- The entire process has a maximum of 12 months from serving notice (unless we need to go to Court / Tribunal).
Your dedicated case manager keeps you informed at every stage. No chasing, no wondering what's happening.
What if my freeholder does not respond or cooperate?
Unresponsive freeholders are frustrating but not uncommon. If your freeholder doesn't reply, as part of our process we will do lots of research.
They might be:
- An absent landlord with no forwarding address
- A dissolved company
- An estate in probate
- Simply ignoring correspondence
Once we understand the issue, we take the appropriate legal steps. This might include tracing the freeholder, applying to the court for a vesting order or using the statutory process to force a response.
We've handled these situations many times. No matter what happens a lease extension is a statutory right – a difficult freeholder won't stop your lease extension.
Can I extend my lease informally?
Yes, you can negotiate directly with your freeholder outside the statutory process. However, we rarely recommend it.
An informal lease extension might look good on paper, but when you dig into it, you often discover the same hidden traps. Most freeholders are investors whose sole goal is to maximise their return at your expense.
Informal deals frequently include:
- Offering significantly less than the additional 90 years you'd normally get
- Changes to the lease which become permanent which can cost you thousands
- Keep the existing ground rent in place to maximise their income
A statutory lease extension is the "gold standard." It guarantees 90 years, reduces ground rent to zero and only limited changes to the lease can be made. The question to ask yourself is: "Why would a freeholder offer me a better deal than they're legally required to?"
Do I have to pay Stamp Duty?
Stamp Duty Land Tax (SDLT) only applies if your premium exceeds certain thresholds.
You will pay Stamp Duty if:
- The premium exceeds £125,000 for a single property
- The premium exceeds £40,000 if you already own other properties (additional property surcharge applies)
Most lease extensions fall below these thresholds, so SDLT often doesn't apply. We'll confirm whether it affects your situation as part of your Valuation. It is worth noting a Stamp Duty Return is always required if the premium is above £40,000.
Can I sell or remortgage during the process?
Often yes, though it depends on your circumstances.
If your lease still has plenty of years remaining and your ground rent isn't excessive, and your buyer / their lenders would proceed with its current lease then you are in a good position as we can transfer our Guaranteed Price over to your buyer as part of your sale.
If not, trying to both sell a property and extend the lease at the same time is more complex. It's like trying to land two planes on a runway at the same time. The buyer's lender will have their own requirements, and timing becomes critical.
If you are looking to remortgage you might find yourself in a "chicken-and-egg" situation where your lender will not release the funds until the lease extension is complete, but without the remortgage you can't pay for the lease extension.
We can advise on the best approach for your situation. In nearly all cases, completing the extension first makes the sale smoother and more valuable. This is why we offer lease extension financing to help you extend now, pay later.
What happens if my freeholder and I cannot agree on the price?
Disagreements over the premium are common. Freeholders typically want to charge more than the lease is worth extending. That's where our expert negotiators come in.
Our RICS valuers and SRA-regulated solicitors handle the negotiations on your behalf, backed by robust valuation evidence.
If you still cannot reach agreement, statutory lease extensions can be determined by the First-tier Tribunal (Property Chamber). The Tribunal examines both valuations and sets a fair premium based on the legal formula.
This does unfortunately add significant time and cost to the process, but any cost of Court and/or Tribunal are included as part of our Guaranteed Price.
How do I get started?
Getting started takes less than a minute.
- Request your free lease report: Register on our website and we'll pull your lease details from HM Land Registry
- Review your personalised report: See your lease length, ground rent, landlord details and estimated extension cost
- Book a free consultation: Speak with our ALEP-accredited team about your options (no obligation, no pressure)
- Get your Guaranteed Price: We conduct a full RICS valuation and confirm your price and check your eligibility for finance
- Extend with confidence: We handle everything from negotiation to HM Land Registry registration
You'll know exactly what you're paying from the start. No large upfront costs, no surprises along the way.
Still have questions? We're here.
Get your free personalised lease report in under a minute, or speak with our ALEP-accredited team. No obligation, no pressure.