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House Extensions Hounslow

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.

Steel and new floor joists set out on a rear extension built by GS Renovation at a UK home
The steel seated and the joists hung off it, with the cavity wall closed and scaffold still in place.

Side-return and rear extensions in Hounslow

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, you serve the necessary party wall notices before we break ground in TW7 or TW8.

Planning and permitted development in Hounslow

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.

  • Single and double storey extensions
  • Side-return and rear extensions
  • Trial holes to set foundation depth near drains and trees
  • Wrap-around extensions and infills
  • Full fit-out, finishing and making good
Service areaHounslow · TW3, TW4, TW5 and TW7
Local authorityHounslow Council
Part ofWest London (Outer London)
Typical homesVictorian terraces, Edwardian villas and riverside homes
Also covered nearbyHillingdon, Ealing, Hammersmith and Fulham and Richmond upon Thames

Why Hounslow Homeowners Choose GS Renovation

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.

  • Rated 4.9 from 31 reviews on MyBuilder
  • Honest updates if a date or a detail has to move
  • Brick and mortar matched to the existing elevation
  • Straight advice on what is and is not worth spending money on
  • Insulation and thermal detailing to current regulations
  • Drainage diverted or built over with the right approval in place
30+ YearsFounder's experience
Fully Insured5 year guarantee
4.9 / 531 MyBuilder reviews
Building ControlCompliant
Free QuotesNo obligation
Reviews

Rated 4.9 / 5 by our clients

★★★★★ 4.9 average from 31 verified reviews on MyBuilder

★★★★★
Built a new extension at rear of property. Laid foundations, drainage, raised floor, new roof and completed all fixtures and interior decoration…
Customer of GSrenovationvia MyBuilder
★★★★★
George always kept to commitments and arrived on time. He offered helpful suggestions during his initial visit and promptly provided a reasonably…
scomtottIslington, London · via MyBuilder
★★★★★
Giorgio is an excellent and intelligent workman, and with very reasonable prices! He installed a kitchen extractor fan in a complicated situation…
Adil KhanWoolwich, London · via MyBuilder
Read all 31 reviews

FAQ

Frequently Asked Questions about House Extensions Hounslow

How much should house extensions in Hounslow cost?

Expect the figure to track scope rather than postcode. The house extensions elements that move a quotation are span, access and condition, all of which we check at the TW3 property before writing anything down. GS Renovation then itemises labour, materials and the Hounslow Council element for your Hounslow home. Comparing that against another Hounslow builder is straightforward because every line is visible. Ring 07472 424 226 and we will arrange a free survey at the TW3 property in Hounslow. 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.

What is a realistic timeline for house extensions across Hounslow?

It depends on the scope, and we will map it at survey. Once we have seen the TW3 property, house extensions can be programmed properly for your Hounslow home, including the making good that bay-fronted Victorian and Edwardian terraces with rear closet wings and side returns demand. GS Renovation issues that with the quotation. Nothing about a Hounslow timeline is left to be worked out on site. Email info@gsrenovationltd.co.uk with the TW3 address and we will programme the Hounslow work properly from the outset.

Should I use a local firm for house extensions in Hounslow?

Local knowledge changes the quotation more than people realise. What house extensions require in a bay-fronted Victorian terraced Hounslow home is not what it requires on a new estate, and GS Renovation prices the TW3 property from having done it repeatedly across Hounslow. Distance also decides how quickly anyone returns for aftercare. Ring 07472 424 226 and ask which Hillingdon jobs are running now. Ask any firm quoting at your TW3 home for Hounslow addresses to visit.

Will an extension in Hounslow need a CIL payment?

It can. The Community Infrastructure Levy applies above 100 square metres of new floorspace, though a residential extension to your own home usually qualifies for relief if it is claimed before work starts. Missing that claim is expensive, so we flag it early on Hounslow projects.

Have you done house extensions in bay-fronted Victorian terraced homes around TW3?

That stock is our core work. House extensions in the streets around TW3 is familiar enough that GS Renovation knows which parts of a Hounslow house tend to hide problems, and prices for them instead of discovering them later. Hounslow Council building control is coordinated by us throughout. Ask for references anywhere in Hounslow. Ask on 07472 424 226 what house extensions typically uncovers in a Hounslow house near a TW3 address, and what it costs.

Will my Hounslow rear extension need planning permission or is it permitted development?

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.

Do you cover Hounslow and the surrounding West London for house extensions?

Both are within our normal working area. House extensions are not priced by distance within West London, so a Hounslow homeowner and a Hillingdon one get the same treatment and the same free survey. GS Renovation is on Hounslow sites most weeks. Call 07472 424 226 to check availability for your TW3 property. We will be straight with you if it is too far. Aftercare visits afterwards are equally straightforward wherever the property actually sits.

Every Service, One Team

More GS Renovation Services in Hounslow

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:

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Free, no-obligation quote for house extensions in Hounslow. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.

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