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 Lambeth. We act for leaseholders in Brixton, Clapham, Streatham, West Norwood, Tulse Hill, Herne Hill, Stockwell, Vauxhall, Kennington, Oval, Waterloo and parts of Norwood and Crystal Palace. From riverside developments along Albert Embankment and in Waterloo – including The Dumont, Merano Residences and Parliament House – to mansion blocks in Clapham, period conversions in Herne Hill and purpose-built flats across Streatham, we advise across a wide range of property types. We also have extensive experience acting on ex-local authority estates where many leases were granted during the 1980s Right to Buy era, including the Angell Town Estate, Loughborough Estate and Moorlands Estate in Brixton; the St Martin’s Estate and Tulse Hill Estate; the Cressingham Gardens Estate; the Central Hill Estate in Upper Norwood; Ethelred Estate in Kennington; Myatts Field North; and estates around Stockwell Park and Clapham Park. Our valuations are grounded in detailed Lambeth market knowledge and supported by robust, up-to-date comparable evidence.
As the unexpired term of your lease reduces, you will generally have the legal right to add 90 years to the existing term and reduce the ground rent to nil under the Leasehold Reform, Housing and Urban Development Act 1993. This statutory entitlement is particularly significant once the lease falls close to 80 years remaining, as marriage value then becomes payable, often increasing the premium in a material way. Taking advice at the right time can therefore have a meaningful impact on overall cost.
We act extensively for leaseholders of Lambeth Council properties, with the Council remaining the freeholder of a large proportion of former local authority flats throughout the borough. Blakes Chartered Surveyors provide carefully evidenced, RICS-compliant valuations tailored to Lambeth market conditions, while Arcadia Law manage the Section 42 notice, negotiations and HM Land Registry registration. Our coordinated valuation and legal approach ensures the statutory process is handled strategically, efficiently and with your financial interests fully protected.
We handle lease extensions for prominent riverside schemes such as St George Wharf, Riverlight Quay, and Nine Elms Point, as well as ex-local authority stock on the Vauxhall Gardens Estate and Wyvil Estate.
In Waterloo, we work on flats in County Hall Apartments, The Whitehouse, and Perspective Building, alongside ex-local authority developments like the Christchurch Estate and Windmill Estate.
Clapham lease extensions include period mansion blocks such as Clapham Mansions and Victoria Rise Mansions, as well as modern apartments in Clapham One. Ex-local authority examples include the Fenwick Estate and Clapham Park Estate.
Our Brixton work includes ex-local authority estates such as Loughborough Estate and Moorlands Estate, plus modern private developments like Brixton Square. We also handle Victorian conversions around Trinity Gardens.
In Streatham, we act on lease extensions for flats in Pullman Court, Prentis Court, and ex-local authority blocks within the Streatham Hill Estate. There’s a strong mix of purpose-built 1930s stock and post-war council developments.
Kennington lease extensions often involve flats within Cleaver Square period conversions, ex-local authority stock in the Cotton Garden Estate, and modern apartments in Oval Quarter.
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The cost of extending your lease depends on several factors, including whether your property is under the ownership of Lambeth 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 Lambeth, 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.