Single and double storey extensions in Hounslow. Trusted, professional, 30+ years' hands-on experience.
GS Renovation builds house extensions throughout Hounslow, working with the bay-fronted Victorian and Edwardian terraces and riverside homes that define the borough. Drawing on more than 30 years across TW3, TW4, TW5, TW7, TW8 and W4, we handle everything from foundations to final fit-out, whether you are extending in Isleworth, Brentford or towards Chiswick.

The classic Hounslow extension fills in the side return beside the rear closet wing, widening a narrow Victorian kitchen into a bright open-plan space that runs the full width of the house. We dig and pour the foundations, allowing for any nearby trees and the London clay common across the borough, then build up in matching brick and tie the new roof into the existing structure.
Wrap-around extensions combine the side return with a rear projection to create a generous kitchen-diner, usually needing a steel beam where the original rear wall comes out. We manage the groundworks, the steel, the roof and the glazing as one job, and because the wall to your neighbour is a shared party wall, we help you serve the necessary party wall notices before we break ground in TW7 or TW8.
Whether your extension is permitted development or needs a full planning application depends on the property and its size. Many single-storey rear extensions on Hounslow's terraces fall under permitted development rights, but homes in a conservation area near Chiswick House, Osterley Park or Syon Park, or any property that has already been extended, often need permission from Hounslow Council. We advise honestly on which route applies before you commit.
Either way, the structural build is governed by building regulations, so building control inspects the foundations, the steelwork, the insulation and the drainage as the work proceeds. We prepare the drawings, submit to Hounslow Council or a permitted development lawful use certificate where sensible, and coordinate the party wall side too, so your Brentford or Isleworth extension is fully compliant from footings to finish.
Hounslow homeowners choose GS Renovation because one team carries the extension from foundations to fit-out, including the steel, the roof and the fine finishes. We know the borough's terraced stock, the clay ground conditions and the local planning picture, and we keep sites tidy and neighbours informed. Thirty years of extensions across West London back the work.
George was brilliant. Lovely bloke, very reasonably priced and a perfectionist to boot. He completed our small kitchen renovation with care and great attention to detail. I've already recommended him to others.
Splendid job on our new kitchen refurb, including new flooring, moving the services, installing RSJ and preparing space for new back doors… George was always friendly, communicative and has an excellent attention to detail, ensuring everything is finished to a high standard.
Giorgio is an excellent and intelligent workman, and with very reasonable prices!… He paid a lot of attention to detail that is not common at all, and the final result was immaculate. Highly recommended!
FAQ
The cost of house extensions in Hounslow depends on the size of the property, the specification and the scope of work. GS Renovation provides free, detailed and itemised quotations for every Hounslow project. Call 07472 424 226 or email info@gsrenovationltd.co.uk for a no-obligation estimate. As a rough guide, house extensions in London typically starts from roughly £40,000 for a single-storey rear extension and rises with size and specification (indicative London ranges, MyBuilder and Checkatrade, 2026). Your figure depends on the size, specification and condition of the property, which is why we survey before quoting.
We will give you an honest timescale for house extensions in Hounslow after surveying your home. Most projects run on a clear weekly programme, and we tell you up front about any lead times on materials or approvals.
GS Renovation's team brings over 30 years of hands-on experience to house extensions and wider building work across Hounslow and the surrounding area. We offer free quotes, a dedicated project manager, full insurance, building control compliance where required, and comprehensive aftercare.
Many single-storey rear extensions in Hounslow fall under permitted development, but side returns, double-storey extensions and work in conservation areas usually need full planning permission. We assess your property and manage both the planning application and building control.
Yes. A large share of Hounslow's homes are Victorian and Edwardian terraced properties, and we renovate them regularly. We plan each house extensions around their particular characteristics, such as solid brick walls, rear closet wings, side returns and original period features, so the result suits the building and meets building control.
It depends on the size and the property. Many single-storey rear extensions on Hounslow terraces are permitted development, but if you are in a conservation area near Chiswick House or the home has been extended before, you will likely need permission from Hounslow Council. We assess your specific property first. Regardless of the planning route, the build itself needs building regulations approval.
We do. GS Renovation covers all of Hounslow and the TW3 area and the wider West London. Call 07472 424 226 and we will confirm we work on your road.
Every Service, One Team
The same trusted team, 30+ years' hands-on experience and free, no-obligation quotes apply to every GS Renovation service in Hounslow. Explore what else we do locally:
Steel beam installation, RSJ and structural alterations.
Safe load-bearing wall removal with steel beam support.
Structural alterations, new openings and steel support.
Chimney breast removal with gallows bracket or beam support.
Open-plan kitchen, diner and living conversions.
Full refurbishments and whole-house renovations.
Bespoke kitchen design and installation.
Luxury bathroom and wet-room refurbishment.
Same Service, Nearby Areas
We carry out house extensions across Hounslow and the surrounding areas. Explore a nearby location:
Contact GS Renovation today for a free, no-obligation quote for house extensions in Hounslow.
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