Section 42 Notice: The Formal Lease Extension Process

If you own a leasehold flat and want to extend your lease, you have a powerful legal tool: the Section 42 notice. It's your statutory right to demand a lease extension from your freeholder — and they can't simply refuse. Understanding this process can save you tens of thousands of pounds and give you control over one of the biggest financial decisions you'll make as a leaseholder.

What Is Section 42?

Section 42 refers to Section 42 of the Leasehold Reform, Housing and Urban Development Act 1993. It's the provision that gives leaseholders of flats the right to extend their lease by 90 years at a peppercorn (zero) ground rent, in exchange for paying a premium to the freeholder.

This isn't a request or a negotiation opener — it's a legal right. Once you serve a valid Section 42 notice, the freeholder must engage with the process. They can negotiate on the premium, but they cannot refuse to extend.

What You Get

Under the current law, a Section 42 extension gives you:

• 90 years added to whatever remains on your current lease
• Ground rent reduced to zero (a peppercorn)
• Otherwise on the same terms as your existing lease (with certain modernisations the tribunal can make)

So if you have 70 years remaining and successfully extend, your new lease will be for 160 years at zero ground rent. That's a transformative improvement — your property goes from being difficult to mortgage to having a lease length that no lender will question.

How This Will Change Under the 2024 Reforms

The Leasehold and Freehold Reform Act 2024 will change several aspects when fully implemented:

• Extensions will be for 990 years instead of 90 years
• The two-year ownership requirement will be removed
• Marriage value will be abolished (reducing costs for leases under 80 years)
• A new standard valuation methodology will be introduced

As of early 2026, these provisions are being implemented in phases. Until they're in force, the current Section 42 process applies.

Who Qualifies?

To serve a Section 42 notice, you must meet these criteria:

You Must Own a Long Lease

Your original lease must have been granted for more than 21 years. Almost all residential leases qualify — typical lease lengths are 99, 125, or 999 years when originally granted.

You Must Have Owned for at Least Two Years

You need to have been the registered owner (at the Land Registry) for at least two years before serving the notice. This is a qualifying period — you can't buy a flat and immediately serve notice.

Important: The two-year clock starts from the date of registration at the Land Registry, not the date of exchange or even completion. Registration can take weeks after completion, so factor this in.

The Property Must Be a Flat

Section 42 applies to flats (and maisonettes), not houses. Houses have a separate right to extend under different legislation (the Leasehold Reform Act 1967), with different terms.

Certain Properties Are Excluded

• Properties within a cathedral precinct
• National Trust properties
• Crown land (in some circumstances)

In practice, these exclusions affect very few leaseholders.

The Process Step by Step

Step 1: Get a Professional Valuation

Before serving your notice, commission a valuation from a RICS-qualified surveyor experienced in lease extensions. This isn't optional — the premium figure in your notice needs to be realistic. Serving a notice with a ridiculously low premium is technically valid but can undermine your negotiating position and credibility.

The surveyor will calculate:

• The diminution in value of the freeholder's interest (the loss in value to the freeholder from granting a longer lease)
• Marriage value (if your lease is under 80 years) — 50% of the increase in property value resulting from the extension
• Compensation for any other loss the freeholder might suffer

They'll give you a figure for the premium and advise on a strategy.

Step 2: Instruct a Specialist Solicitor

Your solicitor prepares and serves the Section 42 notice. This document must contain specific information:

• Your details and the property address
• The proposed terms of the new lease
• The premium you're offering — based on your surveyor's valuation
• A date by which the freeholder must respond (at least two months from service)

The notice must be served correctly — on the right person, in the right form. Errors can invalidate it, so this is not a DIY job.

Step 3: The Freeholder's Counter-Notice

The freeholder has two months from the date of your notice to serve a counter-notice. The counter-notice must:

• Accept your proposed terms (rare — they almost always negotiate)
• Propose different terms — usually a higher premium, and possibly different lease conditions
• Challenge your right to extend (rare, and only if they have grounds — for example, they believe you haven't owned for two years)
• Claim the property back — in very limited circumstances, the freeholder can oppose the extension if they intend to redevelop the building. This is uncommon and subject to strict conditions.

What If They Don't Respond?

If the freeholder fails to serve a counter-notice within two months, you can apply to the court for an order granting the lease extension on the terms you proposed. This is one of the strongest protections in the process — the freeholder can't just ignore you.

In practice, absent freeholders (companies that have been dissolved, individuals who can't be traced) are a real problem. There are legal mechanisms to deal with this — including applying to the county court for a vesting order — but they add time and cost.

Step 4: Negotiation

Once both notices have been served, you enter a negotiation period. This is where the two surveyors (yours and the freeholder's) try to agree on the premium.

The gap between initial positions can be significant:

• Your surveyor says the premium should be £15,000
• The freeholder's surveyor says £35,000
• After negotiation, you might settle at £22,000

Negotiation typically takes two to six months. The key factors are:

• The remaining lease length — shorter leases mean higher premiums
• The ground rent — higher ground rents increase the freeholder's interest value
• The property value — higher-value properties mean higher premiums
• Marriage value — the biggest variable for leases under 80 years
• Comparable evidence — what have similar extensions cost nearby?

Step 5: Tribunal (If You Can't Agree)

If negotiation fails, either party can apply to the First-tier Tribunal (Property Chamber) to determine the premium. The tribunal acts as an independent arbiter:

• Both sides submit valuation evidence
• There's usually a hearing (sometimes decided on papers)
• The tribunal applies the statutory valuation methodology
• Their decision is binding on both parties

Tribunal hearings are relatively informal compared to court proceedings. You don't need a barrister (though some people use one for high-value cases). The tribunal's expertise in lease valuation is deep — the panel members deal with these cases regularly.

Timing: Applications typically take four to six months to be heard after filing.

Costs: The tribunal application fee is modest (£100 to £500 depending on the case). Each side usually bears their own costs — the tribunal rarely orders one party to pay the other's costs, which protects leaseholders from the risk of a large costs order.

Step 6: Completion

Once the premium is agreed or determined:

1. Your solicitor prepares the new lease
2. You pay the premium to the freeholder
3. The new lease is executed (signed by all parties)
4. It's registered at the Land Registry
5. Your mortgage lender is notified and their charge is transferred to the new lease

Costs Involved

The Premium

This is the payment to the freeholder for agreeing to the extension. It's the main cost and varies enormously depending on:

• Remaining lease length
• Property value
• Ground rent level and escalation
• Whether marriage value applies

Your Professional Costs

The Freeholder's Costs (You Pay These Too)

Under the current law, the leaseholder is responsible for the freeholder's reasonable legal and valuation costs incurred in dealing with the notice. Typically:

The key word is reasonable. If the freeholder's costs seem excessive, you can challenge them — either by negotiation or at the tribunal.

Total Costs (Excluding Premium)

Budget for approximately £4,000 to £9,000 in professional fees on top of the premium itself. For a complex case or one involving a tribunal, it could be more.

Important Tactical Considerations

Freezing the Valuation Date

One of the most valuable aspects of serving a Section 42 notice is that it freezes the valuation date. The premium is calculated based on the lease length and property value at the date the notice is served — not the date the extension completes.

This matters because:

• The lease is getting shorter every day, which increases the cost
• If your lease is about to drop below 80 years, serving notice now freezes it above that threshold — avoiding marriage value
• Property value changes after the notice date don't affect the premium

Example: Your lease has 80 years and 6 months remaining. If you wait a year, it'll be under 80 years and marriage value kicks in. But if you serve notice now, the valuation is frozen at 80 years and 6 months — marriage value doesn't apply, even if the process takes a year to complete.

Withdrawing After Serving Notice

You can withdraw your Section 42 notice at any time before completion. But there are consequences:

• You must pay the freeholder's costs incurred up to the date of withdrawal
• You cannot serve another notice for 12 months
• Any tactical advantage of the frozen valuation date is lost

Assigning the Benefit of the Notice

If you sell your flat after serving a Section 42 notice but before completing the extension, you can assign the benefit of the notice to your buyer. This means they can continue the process without starting again (and without waiting two years). This is a valuable right — and something to negotiate as part of the sale.

How This Interacts with Mortgages

If you have a mortgage on the property:

• Your lender must consent to the new lease terms — they'll want to see that the new lease is acceptable as security
• Most lenders are supportive of lease extensions (it improves their security)
• The lender's charge will be transferred from the old lease to the new one
• Some lenders have specific requirements about lease terms — your solicitor will liaise with them

If you're buying a property with a short lease and planning to extend:

• Some lenders will offer a mortgage conditional on a lease extension completing within a set period
• Others won't lend at all until the extension is done
• A specialist broker can identify lenders who'll work with you

Take Control

The Section 42 process exists because Parliament recognised that leaseholders need protection from freeholders who might otherwise refuse to extend or demand unreasonable sums. It's not a quick process, and it's not free, but it gives you a genuine legal right to secure your home's future.

If your lease is getting short, don't put this off. Every year of delay makes the extension more expensive. Serve notice, freeze the valuation date, and start the process. Your future self — and your future mortgage lender — will thank you.

This is educational content, not financial advice. Your situation is unique — speak to a qualified mortgage broker and a specialist leasehold solicitor before making any decisions.