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House Extensions in Hounslow
Hounslow-based builders for rear, side return and wraparound extensions. Clear written quotes, one team, no surprises.
- Free site visit and feasibility check
- Permitted Development advice, or a full planning application to the London Borough of Hounslow
- Architectural drawings, structural calculations and steel design
- Party Wall notices where your extension is near the boundary
- Building Regulations application and stage inspections
- Groundworks, foundations, drainage and masonry
- Roof structure, insulation and rooflights or lantern
- Bi-fold, sliding or French doors and windows, with acoustic glazing options
- First and second fix electrics, plumbing and heating
- Plastering, screeding, flooring and decoration
- Building Control completion certificate
Lavington Build is based in Hounslow, so when you ask us to quote for an extension you are dealing with a local team, not a firm driving in from the other side of London. We know the housing here: the 1930s semis and terraces that make up most of Hounslow West, Lampton and Heston, and the older Victorian terraces closer to the town centre.
Most Hounslow extensions we are asked about are single-storey rear extensions that open the kitchen into a proper family space, side return extensions on terraces, and wraparound extensions on semis with a side passage. We handle the whole job, from the first drawings and the London Borough of Hounslow planning or Permitted Development route through to Building Control sign-off.
If your home sits under the Heathrow flight path, we can talk through acoustic glazing and insulation as part of the build, so the new space is as quiet as it can be.
Hounslow (TW3, TW4, TW5), Hounslow West, Lampton, Heston, Cranford, Isleworth, Osterley, Whitton, Feltham, Brentford
Local to Hounslow. We are based here, so site visits and day-to-day supervision are easy.
Fixed written quotes. Labour and materials set out line by line before we start.
Rated 5 stars on Google. Read what local homeowners say on our Google profile.
Planning and Building Regs handled. From the first drawing to the completion certificate.
Fully insured. Public liability cover on every project.
How much does a house extension cost in Hounslow?
Most single-storey rear 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 lands between £35,000 and £60,000. We give you a fixed written quote after the site visit.
Do I need planning permission in Hounslow?
Many single-storey rear extensions fall under Permitted Development, so no full planning application is needed, although larger ones may need prior approval from the council. Side and wraparound extensions usually need full planning permission from the London Borough of Hounslow. We check your property's position at the site visit.
How long does an extension take?
A single-storey rear extension usually takes 12 to 16 weeks on site. Wraparound and larger extensions take longer. Planning, if needed, adds about 8 weeks before we start.
Can you help with noise from Heathrow?
Yes. We can specify acoustic glazing and extra insulation in the walls and roof of the new space. Tell us at the site visit and we will build it into the quote.
Book a free site visit and get a fixed written quote. We cover Hounslow, Heston, Cranford, Isleworth, Whitton, Feltham and the surrounding area. We reply within 1 working day.