The Royal Borough of Kensington and Chelsea
Building in Kensington & Chelsea: a local guide
Housing stock, planning and conservation notes, and indicative costs for extensions, lofts and renovations in Kensington & Chelsea, plus quotes from independent local builders.
Homes in Kensington & Chelsea
Kensington and Chelsea is defined by stucco-fronted Victorian terraces, mews houses, garden squares and mansion blocks, with a high proportion of flats and listed buildings.
Typical projects here
High-specification refurbishments, mews house renovations, roof works within policy, and listed-building works with consent.
Planning and conservation in Kensington & Chelsea
Planning and building control in this area are handled by The Royal Borough of Kensington and Chelsea. Most of the borough is within conservation areas, and it has many listed buildings. The Royal Borough's local plan contains detailed policies on basements and on alterations to period properties. Before you design, check whether your property is in a conservation area, is listed or is covered by an Article 4 direction; these change what you can build without permission. Our guide to permitted development in London explains the national rules, and loft conversion regulations covers roof works.
Construction management plans and careful neighbour liaison are standard expectations here.
Typical building costs in Kensington & Chelsea
As a central London borough, Kensington & Chelsea typically sits in the central range of about £3,500 to £4,500+ per m² for residential work, a 25–40% premium over outer London. Budget on top for professional fees (about 15%), consents and contingency (8–15%) and VAT at 20% on extensions and renovations. These are indicative industry ranges for 2026, not a quote; see our London cost guide or request fixed quotes from local builders.
Neighbourhoods in Kensington & Chelsea
Questions about building in Kensington & Chelsea
Can I request quotes from builders in Kensington & Chelsea?
Yes. Quote requests are accepted from anywhere in Kensington & Chelsea, including Kensington, Chelsea, Notting Hill, South Kensington, Earl's Court, Holland Park, North Kensington, Brompton, across London and the wider UK. With your consent, we pass your enquiry to up to 3 local builders who advertise with us.
Do I need planning permission for an extension in Kensington & Chelsea?
It depends on your property. Houses outside conservation areas may be able to use permitted development, while flats, conservation areas and Article 4 directions usually mean an application to The Royal Borough of Kensington and Chelsea. A Lawful Development Certificate gives certainty.
Should I check a builder’s insurance?
We ask every builder who advertises with us to provide proof of current public liability insurance before they are listed. Always check each builder’s insurance, references, written quote and trade body membership yourself before work starts.
Nearby: Ealing · Hammersmith & Fulham · Camden · Islington · Wandsworth · all London boroughs · UK areas
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Request quotes for your Kensington & Chelsea project
Tell us about your extension, loft or renovation anywhere in the UK. With your consent, we pass your enquiry to up to 3 independent builders who advertise with us, so they can contact you with quotes. We do not carry out building work ourselves.
- Free to use, no obligation
- Up to 3 builders, only with your consent
- Always check each builder’s insurance, references and written quote