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 Southwark. From warehouse conversions and established riverside developments in Bermondsey, Shad Thames and Rotherhithe, to Victorian mansion blocks in Camberwell and period properties in East and West Dulwich, our valuations are grounded in detailed local knowledge and supported by carefully analysed comparable evidence. We regularly act for leaseholders in Borough, London Bridge, Bankside, Walworth, Peckham, Nunhead, Surrey Quays and Canada Water, covering a broad mix of mansion blocks, converted houses and 1960s–1980s purpose-built flats.
We also have extensive experience advising on ex-local authority estates where many leases were granted during the 1980s Right to Buy era, including the Aylesbury Estate and the former Heygate Estate area in Walworth, the Rockingham Estate, Wyndham and Comber Estate, Ledbury Estate and North Peckham Estate in Peckham, the Four Squares Estate and Dickens Estate in Bermondsey, the Abbeyfield Estate in Rotherhithe, and the Kingswood Estate in Dulwich. Southwark’s property stock is highly varied, and each estate or block requires a valuation approach tailored to its specific lease structure, tenure history and market position.
Southwark Council remains a major freeholder of former local authority flats throughout the borough, and we have extensive experience negotiating statutory lease extensions in this context. Blakes Chartered Surveyors prepare detailed, RICS-compliant valuations based on Southwark-specific transactional data, with careful analysis of relativity and marriage value where applicable, while Arcadia Law serve the Section 42 notice, negotiate the premium and complete registration at HM Land Registry. Our coordinated approach ensures the statutory process is handled strategically and efficiently, protecting both value and outcome for leaseholders across Southwark.
We handle lease extensions for apartments in Renaissance Apartments, Riverdale House, and Silkworks, as well as ex-local authority stock in the Sunderland Road Estate and Lewisham Park Estate.
In Deptford, we act on flats in Paynes & Borthwick Wharf, Greenland Place, and Deptford Landings, along with ex-local authority stock in the Pepys Estate and Crossfield Estate.
Catford lease extensions include flats in Eros House, Ravensbourne Court, and ex-local authority developments on the Rushey Green Estate and Blythe Hill Estate.
Our New Cross work covers flats in conversions along New Cross Road and Jerningham Road, modern apartments in One SE8, and ex-local authority blocks in the Hatcham Estate.
In Brockley, we handle lease extensions for Victorian conversions along Tressillian Road, purpose-built flats in Brockley Court, and ex-local authority stock in the Avonley Estate.
We work on flats in developments such as Forest Hill Court and Homecroft House, along with ex-local authority blocks in the Sydenham Hill Estate and Perry Vale Estate.
📞 020 7373 7373
Or request a free initial consultation for your Lewisham lease extension or freehold purchase.
The cost of extending your lease depends on several factors, including whether your property is under the ownership of Lewisham 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 Lewisham, 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.