The 10 extension builders from Google's results for West London, ranked on Google rating, online presence and other factors. Updated 10 September 2026.
on GoogleAbridge, London
Nilo Construction builds home extensions across North and West London. The firm constructs rear, side, and double-storey additions to create extra living space for residential properties.
07539 757211 1 Church Ln, Abridge, London RM4 1AH
on GoogleWest London
SKC Services constructs single-storey, double-storey, and wrap-around home extensions alongside loft conversions. Operating in Richmond and West London, including Teddington and Chiswick, the builder creates additional living areas to expand residential properties.
on GoogleWest London
Simply Loft carries out home extensions and attic conversions for properties across West London, including Richmond, Acton, and Chiswick. The team manages the full process from initial consultation to structural completion to expand living space.
on GoogleRanelagh Gardens, London
Red Box Maintenance Ltd carries out home improvement projects across Chiswick and South West London. Its services cover kitchen and bathroom refurbishments, property extensions, loft conversions, painting, and general maintenance work.
020 7381 1539 19, Hurlingham Studios, Ranelagh Gardens, London SW6 3PA
on GoogleWest London
Simply Extend builds house and kitchen extensions across East and South London, covering areas such as Croydon, Lambeth and Wandsworth. The business manages residential builds through assigned project managers, handling groundworks, brickwork construction, plastering and internal fittings.
on GoogleWest London
Loft Extensions Ltd handles loft conversions, home extensions, structural alterations, new builds, and general building work in Richmond. The firm serves residential property owners in the TW9 and TW10 areas.
on GoogleLondon
Build Team provides integrated design and construction services for residential extensions throughout London. The team works on kitchen additions, rear and side return builds, wraparound structures, and loft conversions.
020 7495 6561 342 Clapham Rd, London SW9 9AJ
West London
House Extensions West London manages property expansion projects for householders across West London. Services cover various building types, ranging from structural home extensions to converted attic spaces.
West London
Plus Rooms provides house and kitchen extension services to homeowners in Richmond-upon-Thames and across South West London. The company manages projects from design through to construction, handling planning regulatory requirements along the way. Its team also builds loft conversions.
West London
JJ-Build Ltd constructs home and kitchen extensions for residential clients located in North West London. Structural projects are designed to expand floor plans and modernise internal living spaces.
In West London, single storey, per m² typically costs £2,200 – £3,000. Labour in Greater London runs 20% above the UK median, which accounts for most of the difference from the same job elsewhere.
These are the firms from Google's results for "house extensions west london". They are ranked on Google rating, online presence and other factors.
The figures above are West London ranges. These explain what drives them, so you can read a quote properly.
Per-square-metre prices for single-storey, two-storey, side return and kitchen extensions, costs by size, the fees outside the build price, and planning limits by nation.
The permitted development limits for extensions, lofts, porches and outbuildings in England, where the rights do not apply, what prior approval and a certificate cost, and how Wales, Scotland and NI differ.
When the Party Wall Act applies, which notice to serve and how far ahead, what your neighbour can do, what a surveyor's award costs, and the rules in Scotland and NI.
Under permitted development, three metres for a terrace or semi and four for a detached, doubled to six and eight under the prior approval process. Height, materials and how much garden you cover all carry separate limits, and none of it applies in a conservation area.
If you are excavating within three metres of a neighbour's foundations or building on the boundary, yes. You must serve notice two months before work starts. Skipping it is the most common reason extension projects stall.