The 10 extension builders from Google's results for Richmond, ranked on Google rating, online presence and other factors. Updated 10 September 2026.
on GoogleLondon
Architects in Ealing designs home extensions and loft conversions for householders in the Ealing area. Their services cover architectural design, planning applications, permitted development advice, and structural engineering calculations.
020 3161 2637 6th Floor, Unit 6.84, 2 Lakeside Dr, London NW10 7FQ
on GoogleAshford
Highlinedesign Build offers loft conversion and home extension services in Ashford.
0808 169 9459 54a Church Rd, Ashford TW15 2TS
on GoogleLondon
2pm Architects creates architectural designs for residential extension projects throughout Greater London. Working on rear, side, and wraparound structures, the practice assists householders seeking to enlarge kitchen areas and overall living space.
020 3920 9805 45 Dresden Rd, London N19 3BG
on GooglePopes Dr, London
LCCL Construction is a design and build company converting lofts, extending houses and renovating homes across East London. It works in areas such as Hackney, Walthamstow, Leyton and Bow, where much of the housing is Victorian terraces, and provides architectural design as part of its service.
020 8037 7332 3rd Floor, Hathaway House, Popes Dr, London N3 1QF
on GoogleRichmond
Built IQ delivers loft conversions and home extensions across St Albans and Barnet. The team manages project planning, design, and construction to convert unused attic space into residential rooms or practical storage areas.
on GoogleRichmond
Studio 20 Architects London produces architectural designs for loft conversions and house extensions in Richmond. The firm creates plans to reshape roof spaces and enlarge residential properties across the local area.
020 3432 2770 parkshot house, 5 Kew Rd, Richmond TW9 2PR
on GoogleRichmond
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 GoogleRichmond
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.
Richmond
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.
London
Dps co carries out house extensions and loft conversions across London and Surrey. Recent work includes Velux and dormer conversions in Wandsworth to create additional bedroom spaces.
020 8395 8847 93 Upper Richmond Rd, London SW15 2TG
In Richmond, 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 richmond". They are ranked on Google rating, online presence and other factors.
The figures above are Richmond 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.