Everything you need to extend your lease

At Extension.Lease, we deliver specialist lease extension valuations and freehold purchase advice across the London Borough of Wandsworth. From riverside apartment schemes in Battersea and Nine Elms such as St George Wharf, Battersea Reach and Plantation Wharf, to mansion blocks in Clapham Junction and period conversions in Balham, we act across a broad range of property types. We also have extensive experience advising leaseholders on ex-local authority estates where many leases were originally granted during the 1980s Right to Buy era, including the Alton Estate in Roehampton, Doddington and Rollo Estate in Battersea, the Winstanley Estate and York Road Estate near Clapham Junction, the Patmore Estate, Henry Prince Estate, Totterdown Fields (Tooting), and former council blocks around Carey Gardens and Putney Heath. Our local market knowledge ensures valuations that are accurate, defensible and reflective of true Wandsworth market conditions.
As your lease term diminishes, you will usually qualify for a 90-year extension with your ground rent reduced to nil under the Leasehold Reform, Housing and Urban Development Act 1993. This statutory entitlement is particularly significant once a lease falls close to 80 years remaining, as marriage value then becomes payable, often resulting in a marked increase in the premium – a common issue for flats first sold under 1980s Right to Buy leases.
We advise leaseholders throughout Wandsworth, including owners of former council flats where Wandsworth Council is the freeholder. Blakes Chartered Surveyors provide comprehensive, RICS-compliant valuations supported by Wandsworth-specific market data, while Arcadia Law handle the service of the Section 42 notice, negotiations and registration of the new lease at HM Land Registry. Our integrated approach ensures the statutory process is handled efficiently, strategically and with your financial interests fully protected.
We handle lease extensions for riverside developments like Battersea Reach, Albion Riverside, and Prices Court, as well as ex-local authority blocks within the Winstanley Estate and Doddington Estate. The area’s ongoing regeneration makes accurate valuation crucial.
Our Wandsworth Town work covers flats in Smugglers Way riverside schemes, The Schoolyard development, and 1930s mansion blocks along East Hill. Ex-local authority stock includes parts of the York Road Estate and Totterdown Estate.
Putney lease extensions often involve large period mansion blocks such as Kenilworth Court, Carrington House, and Kersfield House, along with riverside schemes like Putney Wharf Tower. We also act on flats in ex-local authority blocks off Putney Bridge Road.
In Tooting, we cover ex-local authority developments like the Aboyne Estate, Hazelhurst Estate, and Alfreda Street Estate, as well as private blocks along Tooting High Street and modern apartments in Springfield Village.
Balham lease extensions include 1930s blocks such as Du Cane Court, period conversions near Balham Park Road, and ex-council flats in the Hyde Farm Estate. Demand here is strong from both owner-occupiers and investors.
In Earlsfield, we work with purpose-built flats near Earlsfield Station, ex-local authority blocks on Garratt Lane, and smaller private developments such as The Limes. Many properties here are maisonettes requiring precise comparable analysis.
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The cost of extending your lease depends on several factors, including whether your property is under the ownership of Wandsworth 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 Wandsworth, 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.