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House Extensions in Brentford
Extensions for Brentford homes. Planning handled, fixed written quotes, one local team.
- Free site visit and feasibility check
- Permitted Development and conservation area advice
- Architectural drawings and planning application to Hounslow council
- Structural calculations and steel design
- Party Wall notices where needed
- Building Regulations application and inspections
- Groundworks, foundations, drainage and masonry
- Roof, insulation and rooflights or lantern
- Bi-fold, sliding or French doors
- Electrics, plumbing and heating
- Plastering, flooring and decoration
- Building Control completion certificate
Brentford's houses are mostly Victorian and Edwardian terraces, with some interwar semis further from the river. On the terraces, a side return or wraparound extension is the classic way to get a bigger kitchen and dining space.
Brentford is in the London Borough of Hounslow and has several conservation areas, including around the old town and the canal. Homes near the Thames and the Grand Union Canal can also sit in a flood zone, which may mean a flood risk assessment with the planning application. We check all of this at the first visit.
Our base in Hounslow is close by, so we can supervise your build day to day.
Brentford (TW8), Brentford End, Syon, Isleworth, Chiswick, Kew Bridge, Ealing
Local team. Based in Hounslow, so visits and supervision are easy.
Fixed written quotes. Labour and materials set out line by line before we start.
Planning and Building Regs handled. From the first drawing to the completion certificate.
Rated 5 stars on Google. See what our customers say.
Fully insured. Public liability cover on every project.
How much does a house extension cost in Brentford?
Most extensions cost between £1,800 and £2,800 per square metre, depending on the finish. A typical 20 to 25 square metre kitchen extension usually costs £35,000 to £60,000. We give you a fixed written quote after the site visit.
Do I need planning permission in Brentford?
Many single-storey rear extensions are Permitted Development. Side and wraparound extensions, and most work in conservation areas, need planning permission from Hounslow council. We check your address before anything is drawn.
How long does an extension take?
A single-storey rear or side return extension usually takes 10 to 16 weeks on site. Planning, if needed, adds about 8 weeks before we start.
Book a free site visit and get a fixed written quote. We cover Brentford, Syon, Isleworth, Chiswick and Ealing. We reply within 1 working day.