Builders in Richmond

Many Richmond houses have been altered over the years, sometimes well and sometimes not. A typical project here brings an older house up to modern standards of comfort while putting back some of what was lost: proper sash windows, cornicing, panelled doors and joinery that suits the period. Our period and listed renovation and bespoke joinery pages show how we approach that work.

The family houses of Kew and the streets off the Sheen Road are mostly Victorian and Edwardian, with gardens and roof space that suit an extension and a loft conversion, often planned together.

Most Richmond extensions are at the back of the house, as a single storey kitchen and living room facing the garden, a side return infill on a terrace, or a wraparound that does both. On a detached or semi detached house there may be room for a side or two storey extension. Our guides to rear extensions in London, glass extensions and orangery, conservatory or extension cover the main choices, and you can try a layout first in our free extension planner.

On a terrace the usual loft conversion is a rear dormer. On a semi detached house a hip to gable conversion can make room for a proper staircase and a larger room. In a conservation area, where much of Richmond sits, a dormer needs planning permission and is often expected to be smaller and set back from the edges of the roof, and roof lights alone are sometimes the better answer. Our loft conversions page and loft conversion cost guide go into more detail.

Richmond is in the London Borough of Richmond upon Thames, and a large part of the borough is covered by conservation areas, including Richmond Green, Richmond Hill and Kew Green. In a conservation area many alterations that would be permitted development elsewhere need planning permission, and the council looks closely at materials, windows and rooflines.

A listed house needs listed building consent for works that affect its character, inside as well as out, alongside any planning permission. We design with these limits from the start, prepare the drawings and heritage information, and manage the applications. Planning a house extension step by step explains the order things happen in.

Typical London jobs priced on our estimator in October 2026, ex VAT and indicative rather than a quotation:

• A single storey extension of about 20 m² of new floor, flat roofed, plus making good the room it joins: around £57,000.
• A rear dormer loft conversion: £68,000 to £81,000.
• New above ground space at a standard specification: £2,650 to £2,900 per square metre of new floor.

Work on a listed or period house, and high specification joinery and finishes, add to these figures. Kitchen units, worktops and appliances are priced separately. Our minimum for a complete extension project, including finishes and fittings, is around £85,000. Our house extension cost guide sets out the full breakdown, and the free estimate prices your own project in two minutes.

Our office is in Chiswick, just across the river from Kew. Nearby we converted the loft at Seven Oak in Chiswick, adding a bedroom, a bathroom and a study, and in Wimbledon we turned two flats back into one house at Woodside. For homes a little further upriver, see builders in Twickenham.

Every project runs as one design and build service, with a single team responsible from concept to completion. We carry £10M public and employers' liability cover, and we plan each job in clear stages so you always know what is happening and why.