Your lease gets shorter every year, and it’s easy to miss until a buyer or a bank flags it.
Drop below 80 years and your flat gets harder to sell. Lenders start refusing mortgages, and buyers ask for a deep discount before they’ll even make an offer.
Here’s the fix: a statutory lease extension gives you a legal right your landlord can’t block.
You don’t need their sign-off to start. I’ve seen the process trip people up simply because they didn’t know the deadlines.
This blog covers who qualifies, what it costs, and the mistakes to skip.
What Is a Statutory Lease Extension?
A statutory lease extension is a legal right under the Leasehold Reform Act 1993. It lets you add 90 years to the remaining term on your flat.
Ground rent drops to a peppercorn, which means effectively zero. If the difference between ground rent and a leasehold fee isn’t clear yet, it’s worth understanding before you start. Your landlord cannot refuse if your lease qualifies.
Since the Leasehold and Freehold Reform Act 2024 took effect on 31 January 2025, you no longer need to wait two years, you can apply as soon as you’re registered as the legal owner at the Land Registry.
One thing worth flagging: the same 2024 Act is expected to eventually raise the extension to 990 years and remove marriage value entirely.
Neither change is in force yet, and no start date has been confirmed, so don’t delay a lease below 80 years on the assumption it’s coming soon.
Who Qualifies for This Right?
Your lease must meet three conditions to qualify. Miss any one of them and the statutory route isn’t open to you, though an informal extension still might be.
- It was originally granted for more than 21 years.
- It is a residential lease, not a commercial one.
- You are the registered owner at the Land Registry, which means you can prove your ownership if your landlord questions the claim.
How Does a Statutory Extension Differ From an Informal One?
Your landlord, often called the freeholder in these deals, can refuse, change terms, or delay without any legal consequence in an informal extension.
They also control the price completely. A statutory extension removes all of that uncertainty. The law protects every step. You can challenge unfair demands at a tribunal.
| Feature | Statutory | Informal |
|---|---|---|
| Legal right | Yes | No |
| Extension years | 90 years | Negotiable |
| Ground rent | Reduced to zero | Stays or rises |
| Landlord can refuse | No | Yes |
| Tribunal option | Yes | No |
| Cost control | Legal formula | Landlord decides |
The Statutory Lease Extension Process Step by Step
The process follows four clear stages. Each stage has legal deadlines that both sides must meet.
Step 1: Build Your Professional Team
Before serving any notice, get two professionals in place. In my experience, a solicitor who specialises in this exact process is worth the extra care, since they confirm that your lease qualifies and identify the correct landlord to serve.
A chartered surveyor values the extension premium and recommends a starting offer figure. The valuation date is fixed when you serve your notice, so this step must happen first.
Budget roughly £1,500 to £3,000 for professional fees at this stage. Gather your original lease, Land Registry title documents, and confirmed freeholder contact details before starting.
Never serve notice to the wrong person. The entire process restarts from scratch if you do.
Step 2: Serve the Section 42 Notice
The formal notice is called a Section 42 Notice. Your solicitor prepares and serves it on your behalf.
It must state your full name and address, a complete description of the property, your proposed premium offer, the lease terms you are requesting, and the official notice date.
Once served, you may need to pay a deposit. This is often 10% of your proposed premium, typically due within 14 days.
Your landlord then has two months to respond with a counter-notice admitting or disputing the claim.
Step 3: Negotiate or Go to Tribunal
Your surveyor and the landlord’s surveyor typically settle the premium through negotiation, working toward a fair figure without going to tribunal.
This saves time and keeps costs lower for both sides. If no agreement is reached, either side can apply to the First-tier Tribunal.
The tribunal reviews evidence from both parties and sets the fair premium. This route adds 6 to 12 months to the process.
Settlement is almost always faster and cheaper than going to tribunal.
Step 4: Complete the Extension
Once a price is agreed, four final steps close the process. You pay the agreed premium to the landlord and cover their reasonable legal costs too.
Both parties then sign the new lease documents. Finally, you register the extended lease at the Land Registry to make it legally binding.
The full process takes 6 to 12 months from the date you serve your notice. Planning avoids the pressure of a fast-declining lease and the costs that come with it.
How Much Does a Statutory Lease Extension Cost?
Extension costs depend on your property value, the lease length, and its location. The premium follows a legal formula, and professional fees sit on top of it:
Premium Terms You Should Know
Your premium is built from three legal terms, each covering a different part of what you’re paying for.
- Diminution value: The difference in your property’s worth before and after the extension.
- Capitalized ground rent: Your future ground rent, converted to a lump sum.
- Marriage value: Half the value gained from extending; only applies below 80 years.
Professional Fees to Budget For
Professional fees sit on top of the premium, and they’re payable whether or not you settle without a tribunal. Here’s the typical range for each:
| Fee Type | Typical Range |
|---|---|
| Your solicitor | £1,500 to £2,500 |
| Your surveyor | £500 to £1,500 |
| Landlord’s legal costs | £1,000 to £2,500 |
| Total fees | £3,000 to £6,500 |
How Lease Length Affects Your Property’s Value
Short leases hurt your property’s market value in several ways. Here is what buyers and lenders think at each stage:
- Below 85 years: Lenders start asking questions. Some add conditions to mortgage offers.
- Below 80 years: Buyers negotiate heavily. Values can drop by 10 to 15%.
- Below 70 years: Many lenders refuse entirely. Cash buyers demand 30 to 50% discounts. Your pool of potential buyers shrinks fast.
- Below 60 years: The property becomes hard to sell. Extension costs are at their highest point.
Note: The gap between these two prices is larger than the cost of most extensions. Protecting your lease protects your asset.
Common Mistakes Leaseholders Make
Most of the process runs on legal deadlines, so small oversights tend to cost more here than in an ordinary house sale. These are the mistakes I see most often.
- Skipping professional help: One missed legal deadline, and you lose your statutory rights entirely. DIY errors cost far more than expert fees.
- Accepting an informal deal without legal review: Quick informal offers often include terms that cost you more over time. Get a legal review before signing anything.
- Ignoring ground rent terms: Escalating rent clauses raise your premium. Check your rent terms early in the process.
- Missing the counter-notice deadline: If your landlord doesn’t respond within two months, you can apply to the tribunal to have the terms decided for you. Don’t just wait past it.
- Assuming the 990-year reform already applies: It isn’t in force yet. Basing your decision on a 90-year extension, not 990, keeps your planning accurate.
Final Thoughts
A short lease costs you money every single year you leave it alone. Once you dip under 80 years, marriage value kicks in and the price jumps.
A statutory lease extension fixes that permanently: 90 more years, ground rent gone, and a legal right your landlord can’t touch.
Confirm your freeholder through the Land Registry, then call a solicitor and get valued before you do anything else.
Waiting on future reforms won’t help you today. Get your lease valued this week and start the process while the numbers are still in your favor.
Frequently Asked Questions
Can I Sell My Flat While a Statutory Lease Extension is in Progress?
Yes, you can assign the notice to a buyer. They take over the claim and complete the extension after the sale goes through.
Does a Statutory Lease Extension Affect My Service Charge?
No, extending your lease does not change your service charge. Your freeholder sets this separately based on building maintenance and management costs.
Can I Extend My Lease if I Have a Mortgage on The Property?
Yes, but you need your mortgage lender’s written consent first. Most lenders agree, as a longer lease protects their security in the property.
Do I Pay Stamp Duty on a Statutory Lease Extension Premium?
Stamp duty may apply depending on the premium amount. Your solicitor will confirm whether a return needs to be filed with HMRC after completion.
Does This Right Apply to Houses as Well as Flats?
No, the statutory route covered here is for flats. Leasehold houses follow a different Act, and under the 2024 reforms new leasehold houses are being phased out almost entirely.
