We design, plan and build house extensions across Barnes and the wider Richmond upon Thames borough — one team, one fixed price, one project manager from sketch to handover.
Barnes is one of London’s most desirable villages. It’s home to Victorian terraces, mews houses and riverside cottages. Planning is strict, and mansard loft conversions often replace standard dormers to preserve rooflines.
Rear extensions with brick or timber facades and slim-framed glazing complement houses around Barnes Pond. Mews houses often require vertical additions rather than large rear extensions.
Recent Barnes projects include a mansard conversion on a Victorian terrace and a complete replacement of a riverside cottage with a contemporary home.
Planning drawings, building-regulations and party-wall paperwork are prepared and submitted by our own team — including for conservation-area or listed properties where extra consent is needed. One point of contact owns both the approvals and the build, so nothing falls between an architect and a separate contractor.
No subcontractor juggling. From the first sketch through structural engineering to final snagging, your project moves through people who all sit in the same office and answer to the same project manager.
You pay in stages, only after each stage is signed off. Variations only happen when scope genuinely changes — and they go through written authorisation, never a verbal "while we are at it".
extensions Our valued customers in Barnes, London decided to add extra space to their 3 bedroom house by extending the ground floor and converting the existing loft. The result was an additional 2 bedrooms and a modern, light-fille
extensions A flat renovation in Barnes, London resulted in a new master bedroom, complete with a shower and walk-in wardrobe. The project also included a new kitchen and overall painting and decorating.
extensions Side-return rear extension on a Victorian terrace, opening up the kitchen and dining space onto the garden.
Yes — Barnes (SW13) is well within our Richmond upon Thames working area. We typically deliver several house extensions projects across this borough each year.
End-to-end (consultation → handover) usually 12–22 weeks. Build phase alone is shorter — most house extensions sites complete in 8–18 weeks depending on scope and finishes.
Typical range: From £2,500 / m². Our online calculator gives you a tighter figure based on your house type and ambitions; the fixed quote follows a free site visit.
It depends on the property. Many house extensions fall under permitted development, especially in Richmond upon Thames. Where planning is needed (conservation areas, listed properties, larger schemes), we handle the application end-to-end.
Many extensions fall under permitted development. We assess your property and tell you exactly what you need on the first visit.
A single-storey extension takes 12–16 weeks from breaking ground to completion. Double-storey runs 16–22 weeks.
For most rear extensions, yes. We dust-seal the working area and maintain access to your kitchen and bathroom.
Free 2-minute calculator + a fixed-price quote within one working day after a site visit
