Everything you need to extend your lease

At extension.lease, we provide specialist lease extension valuations and freehold purchase advice across the London Borough of Camden. From elegant mansion blocks in Hampstead to modern apartments in King’s Cross, our local knowledge ensures valuations that are evidence-based, accurate, and tailored to the borough’s unique leasehold market.
We handle lease extensions for premium mansion blocks such as Heath Mansions, Greenhill, and Gainsborough Court, along with period conversions on Fitzjohn’s Avenue and East Heath Road. We also act on flats in ex-local authority estates like Vale of Health Estate.
In Belsize Park, we work with mansion blocks such as Belsize Court, Parkhill, and Hampstead Hill Mansions, as well as ex-council flats on the Chalcots Estate. Victorian villa conversions along Haverstock Hill are also common instructions.
Camden Town lease extensions include flats in modern developments such as The Triangle Apartments and Canalside Walk, plus ex-local authority estates like Maiden Lane Estate and Hawley Road Estate. Period conversions on Camden Road also feature in our caseload.
Our King’s Cross work covers modern apartments in ArtHouse, Gasholders London, and Plimsoll Building, as well as older ex-local authority blocks on the Priory Green Estate and Cromer Street Estate.
In Kentish Town, we act on lease extensions for flats in mansion blocks like St. Martins House and conversions on Fortess Road. Ex-council stock includes the Ingestre Estate and Hadley Street Estate.
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The cost of extending your lease depends on several factors, including whether your property is under the ownership of Camden Council or a private freeholder.
In addition to the premium and the landlords recoverable costs, you’ll also need to budget for our fixed professional fee of £2,750 + VAT*, which includes all valuation, negotiation, and legal work. This fee is split into two equal instalments, making the payment process straightforward and manageable.
Contact us for a free all inclusive estimate of the total cost of your lease extension, without obligation.
Extending your lease is one of the most important steps you can take to protect your property’s value and mortgageability. If your lease is under 100 years or has a high ground rent, its value may already be affected. Once it falls below 80 years, the cost of extending increases significantly due to marriage value.
Our free, instant Lease Extension Calculator gives you an instant estimate of the premium payable under the Leasehold Reform, Housing and Urban Development Act 1993. It’s a quick, useful guide for leaseholders wanting to understand the likely cost of extending their lease before taking formal advice.
We have a proven track record working with leaseholders in Camden, including properties under the ownership of the local authority and private freeholders. Whether you live in a purpose-built flat, a converted property, or a large housing development, we’ve handled it all
Everything you need to extend your lease



A statutory lease extension is a legal right that allows leaseholders to extend their lease by 90 years and remove any ground rent. This right is granted under the Leasehold Reform Housing and Urban Development Act 1993, and it applies to almost all leaseholders in the UK, whether your property is owned by a local authority or a private landlord.
The entire lease extension process typically takes between 6 to 12 months. This includes the valuation, notice serving, negotiations with the freeholder, and legal work to register the new lease. However, the exact time can vary depending on factors like the complexity of negotiations or if any issues arise with the property documents.
The premium is the price you pay to extend your lease. It depends on several factors:
Our surveyors will carry out a valuation to calculate a fair premium for your lease extension and negotiate where required to ensure you do not overpay.
If your lease has less than 80 years left, the cost of your lease extension will usually be higher. This is because properties with shorter leases are considered less valuable, and the cost to extend is affected by something called the marriage value, which is the increase in the property's value once the lease is extended. To avoid higher costs, it’s often best to act before your lease drops below 80 years.
Yes, your freeholder may charge fees for their involvement in the lease extension process. These fees typically cover the cost of legal work, including the drafting and registration of the new lease. While these fees are usually similar to the costs you incur, they can sometimes be higher depending on the freeholder's approach.