Most leaseholders have the right to extend their lease under the terms of the Leasehold Reform Housing and Urban Development Act (1993). You will have a statutory right to acquire a lease extension if you hold a long lease and once you have been the registered owner of the flat for two years. You do not have to have lived in the flat for two years, just owned it.
The Council's Legal Services do not provide advice or provide an indication of the cost to extend your lease. Before you make an application to extend your lease, you should seek your own independent advice.
There is further information on the Leasehold Advisory Service website, including an online calculator which may help you to estimate how much it will cost to extend your lease.
If you decide to go ahead, you will need to appoint a solicitor to submit a formal notice under section 42 of the Leasehold Reform Housing and Urban Development Act 1993. The notice should be submitted to the Director of Legal Services at the Royal Borough of Kensington and Chelsea, The Town Hall, Hornton Street, London W8 7NX or by DX to 84015 Kensington High Street 2.