Westminster City Council
Builders in Westminster
Housing stock, planning and conservation notes, and indicative costs for extensions, lofts and renovations in Westminster. Request quotes from independent local builders — Home Builders does not carry out building work.
Homes in Westminster
Westminster is defined by mansion flats, Georgian and Victorian terraces, mews houses and a high proportion of listed buildings.
Typical projects here
High-specification flat and mews refurbishments, listed-building works, and roof or rear alterations within policy.
Services in Westminster
Planning and conservation in Westminster
Planning and building control in this area are handled by Westminster City Council. Most of the city is covered by conservation areas; basement and roof policies are detailed. Westminster is the planning authority. 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.
Expect listed-building or conservation constraints on most residential streets; construction management plans are often required.
Typical building costs in Westminster
As a central London borough, Westminster 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 Westminster
Questions about building in Westminster
Can I request quotes from builders in Westminster?
Yes. Quote requests are accepted from anywhere in Westminster, including Marylebone, Paddington, Pimlico, Bayswater, Maida Vale, St John's Wood, Soho, Victoria, 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 Westminster?
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 Westminster City Council. 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 · building services · UK areas
Request quotes · UK introductions
Request quotes for your Westminster 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