A lease extension valuation can feel like another cost added to an already technical process. But if you are asking, do I need a valuation for lease extension, the practical answer is usually yes – particularly if you want to serve a formal notice, negotiate confidently or avoid paying more than you should.
The valuation is not simply a guess at what your lease is worth. It is the evidence behind the premium you offer or accept. It helps turn an uncertain negotiation into a position based on the property, the lease terms and the legal valuation rules that apply.
Do I need a valuation for a lease extension?
A valuation is strongly recommended for almost every lease extension, whether you are a leaseholder or a freeholder. In a statutory lease extension, it is the sensible starting point before a tenant’s notice is served. The notice must state the premium the leaseholder proposes to pay, and that figure needs to be realistic.
You may be able to agree an informal lease extension without commissioning a formal valuation. For example, a leaseholder and landlord may already have a clear commercial agreement, or the landlord may provide a proposed premium. Even then, proceeding without independent advice can be expensive. A seemingly convenient offer may include a higher premium, unfavourable ground rent terms or conditions that would not apply through the statutory route.
For leaseholders, the valuation gives you a properly informed opening offer and a clear sense of the likely range for settlement. For landlords, it provides the commercial basis for protecting the value of the freehold interest and responding appropriately to a claim.
What the valuer is actually calculating
Lease extension premiums are not based on one simple percentage of your flat’s value. A specialist valuer considers several connected factors, including the flat’s market value with its existing lease, the annual ground rent, the years left on the term and the likely value once the lease is extended.
The landlord is generally being compensated for the loss of future ground rent and for receiving the property back later than originally expected. Where the lease has fewer than 80 years remaining, marriage value can also become relevant under the current statutory framework. This represents part of the increase in value created when the lease is extended, and it can make the premium rise significantly.
The valuer will also consider local evidence. Two flats with similar unexpired terms can produce different premiums because their location, condition, value and lease wording differ. A generic online calculator can be useful for an early indication, but it cannot inspect the lease, identify unusual clauses or provide a defensible figure for a legal notice.
Why the 80-year point matters
The 80-year mark is often the point that prompts action, and for good reason. Once a lease falls below it, the premium can increase more sharply because of marriage value under existing rules. Shorter leases can also make a flat harder to sell or remortgage.
That does not mean you should wait until 80 years before seeking advice. If your lease is approaching that point, getting a valuation early gives you time to decide how to proceed rather than being forced into a rushed decision. If it is already below 80 years, a valuation is even more valuable because the numbers are likely to be more sensitive.
Leasehold reform is intended to change aspects of the system, including the treatment of marriage value. However, implementation and detailed rules matter. Until changes are fully in force and apply to your case, it is sensible to work from the law and valuation assumptions that apply now, rather than relying on an expected future outcome.
Is a valuation legally required before serving notice?
There is a distinction between what the law strictly requires and what is commercially sensible.
A formal statutory claim does not necessarily require you to attach a surveyor’s valuation report to the tenant’s notice. However, the notice must contain a proposed premium. Without professional valuation advice, you risk pitching that figure too low, too high or at a level that creates avoidable dispute.
An unrealistically low offer can give the landlord grounds to challenge the validity of the notice. An overly generous offer may put you at a disadvantage from the outset. Either outcome can lead to delay, additional professional fees and more stress.
A specialist lease extension valuer will usually provide a valuation range and advise on a reasonable opening figure for the notice. They can then support negotiations if the landlord serves a counter-notice with a higher figure. This is why valuation advice should be arranged before the legal process begins, not after documents have already been issued.
Formal versus informal extensions: the valuation still matters
The statutory route gives qualifying leaseholders a defined legal framework. Under the current rules, this generally provides a 90-year extension to the existing term and reduces ground rent to a peppercorn. There are eligibility requirements and procedural deadlines, so legal advice remains essential.
An informal deal is negotiated directly with the landlord outside that framework. It can sometimes be quicker and may suit both sides, especially where there is a cooperative relationship. But the landlord can set the proposed terms, and the leaseholder is not automatically receiving the same statutory outcome.
A valuation helps you compare the choices on a like-for-like basis. It allows you to ask whether the informal premium is fair, what the proposed ground rent will cost over time and whether the new lease terms affect the flat’s future saleability or mortgage options. The cheapest-looking upfront offer is not always the best deal.
For landlords, obtaining valuation advice before making an informal offer also supports consistent asset management. It helps avoid underpricing, ensures the terms reflect the interest being given up and creates a clearer audit trail across a portfolio.
What does a lease extension valuation cost?
Fees vary according to the flat, the complexity of the lease and whether negotiations are likely to be required. A straightforward valuation may cost a few hundred pounds, while a more complex matter involving a short lease, high-value property or tribunal preparation will cost more.
It is tempting to focus only on the valuation fee, but that is rarely the right comparison. The greater financial risk is an incorrect premium or a poorly structured informal deal. On a property worth hundreds of thousands of pounds, a well-supported valuation can prevent a far more costly mistake.
Leaseholders should also budget for legal costs, the premium itself and, under the statutory process, certain reasonable professional costs incurred by the landlord. A clear service should explain these cost categories early, so you can make a decision with the full picture rather than discovering charges halfway through.
Choosing the right valuer
Lease extension valuation is specialist work. A general market appraisal for selling your flat is not enough, because the calculation depends on statutory assumptions, lease analysis and current negotiation evidence.
Look for a valuer with specific lease extension experience, ideally a RICS-qualified professional operating through an appropriately regulated practice. Ask whether their fee includes advice on the notice figure, negotiation support and, if needed, tribunal work. The cheapest initial quote can become poor value if you need to instruct a second expert later.
It also helps when the valuer, solicitor and managing process are coordinated. Delays often arise when each professional is waiting for information from another party. Lease Plus 90 brings the process into a clearer managed structure, with access to approved RICS-registered valuers where relevant, so leaseholders and landlords are not left coordinating every moving part alone.
When might you proceed without one?
There are limited situations where a separate valuation may not be necessary. You might have already received recent specialist advice on the same property, be completing an agreed transaction where both parties have independently settled the commercial terms, or be dealing with a very simple portfolio arrangement supported by professional advice.
Even then, check what has changed. A declining lease term, a change in ground rent, a sale agreed at a new price or revised market evidence can all alter the calculation. A valuation is not a document to obtain once and forget about.
Can the landlord and leaseholder use the same valuer?
They can agree to use a jointly instructed valuer for an informal negotiation, but each party should be clear about the valuer’s role and whether they are acting independently or advising one side. In a statutory claim, leaseholders and landlords commonly appoint their own valuers because their interests and negotiation positions differ.
Will a valuation tell me the exact final premium?
Not usually. It provides a reasoned range based on accepted assumptions and market evidence. The final premium may sit within that range after negotiation. If agreement cannot be reached, the First-tier Tribunal can determine the disputed terms.
A good valuation does not remove every discussion. It gives that discussion a credible starting point, keeps expectations realistic and helps prevent the process from drifting.
If your lease is getting shorter, do not let uncertainty over one professional fee delay a decision that affects your flat’s value and saleability. Get the numbers early, understand the route that suits you, and move forward with a position you can justify.

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