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House Extensions Hanwell

Single and double storey extensions in Hanwell. Trusted, professional, 30+ years' hands-on experience.

GS Renovation designs and builds extensions throughout Hanwell, tailored to the bay-fronted Victorian and Edwardian terraces that line its streets near the river. With more than 30 years working across Ealing and W7, we handle groundworks, steel, roofing and full fit-out, giving these period homes the extra ground floor space families here want.

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 Hanwell

The side return, that narrow strip of ground running alongside the rear closet wing, is the classic Hanwell extension. Filling it in widens a cramped galley kitchen into a proper open-plan kitchen-diner, usually with a steel beam replacing the old external wall and rooflights bringing daylight deep into the plan. A rear extension pushes further into the garden, and a wrap-around combines both for the biggest transformation.

We start with the groundworks, which in Hanwell means checking for nearby trees and drainage runs and digging foundations to the depth building control requires. Then come the steel, the walls, the roof and the fit-out. Because we run the whole build with one team, the structure, the services and the finishes all come together without the gaps that happen when trades are hired piecemeal.

Planning and permitted development in Ealing

Whether your Hanwell extension needs a full planning application or falls under permitted development depends on the property. Many single-storey rear extensions on unaltered terraces proceed under permitted development within the size and height limits, while double-storey work, anything on a flat facing the highway, or a home in a conservation area usually needs a planning application to Ealing Council. We assess your specific house before drawing anything.

Separately from planning, every extension must meet building regulations, which govern the foundations, the steel, insulation, fire safety and drainage, and building control inspects these as the work proceeds. Where your extension touches a wall shared with a neighbouring terrace, the Party Wall Act applies too. We coordinate all three strands, planning, building control and party wall, so nothing stalls the build.

  • Levels, drainage and landscaping made good around the new build
  • Wrap-around extensions and infills
  • Flat and pitched roofs with rooflights or lanterns
  • Architectural drawings and structural engineer coordination
  • Full fit-out, finishing and making good
Service areaHanwell · W7
Local authorityEaling Council
Part ofWest London (Outer London)
Typical homesEdwardian terraces near the river
Also covered nearbyActon, Southall and Ealing

Why Hanwell Homeowners Choose GS Renovation

Hanwell homeowners choose GS Renovation because we manage the extension end to end, from the first foundation to the final coat of paint. We know which W7 terraces suit permitted development and which need an Ealing Council application, we understand the shared party walls, and we build to last. Over 30 years of extensions across West London back the work.

  • Scaffolding and site set-up planned for tight London plots
  • Straight advice on what is and is not worth spending money on
  • Fully insured, with cover in place on every site
  • Free, no-obligation quotations
  • Foundation depth set after trial holes, drains and trees are checked
  • Garden levels and access made good where the build meets outside
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

★★★★★
Excellent service. George's knowledge and skills are the best in the market. He knows what he is doing, does really high quality work, gives good…
habibazamChigwell · via MyBuilder
★★★★★
I am very happy to recommend George after he completed the work on my 2 bathrooms. He worked very hard to make sure everything was completed and even…
hit10Enfield · via MyBuilder
★★★★★
Really happy with the quality of remedial works carried out by George in putting other previous tradesman work right. He was very helpful, honest and…
archeryWaltham Cross · via MyBuilder
Read all 31 reviews

FAQ

Frequently Asked Questions about House Extensions Hanwell

How does your house extensions price in Hanwell compare with a national firm's?

We are generally competitive and always more transparent. Every house extensions line for a Hanwell home is visible, including the engineer's fee where the design needs one and the Ealing Council building control element. National pricing tends to be a rate per square metre applied to a W7 address nobody has visited. GS Renovation surveys first, which is what makes a figure hold. That survey is free at any W7 address, in Hanwell and anywhere across Ealing. 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.

Are modern Hanwell properties quicker for house extensions?

Modern stock is usually faster to finish. Where house extensions are concerned the difference shows after the structural stage, because a Victorian and Edwardian terraced Hanwell property needs far more reinstatement around the W7 works. GS Renovation allows for that difference in the programme it issues. Both types are surveyed the same way in Ealing before any dates are committed. Ask GS Renovation on 07472 424 226 what a Victorian and Edwardian terraced property at W7 is likely to require in practice.

Do you handle the paperwork for house extensions in Hanwell?

Paperwork is where house extensions projects quietly lose time, so we take it on. GS Renovation runs the Ealing Council application and inspections for your W7 property alongside the works programme, which keeps the Hanwell job moving. The engineer's design, where the structure requires one, is coordinated by us as well. You receive the certificate at completion. Ring 07472 424 226 to hear how an Ealing application runs. The certificate matters when an Ealing property changes hands.

Will an extension in Hanwell 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 Hanwell projects.

Do you work on Victorian and Edwardian terraced homes in Hanwell for house extensions?

That is most of what we do here. House extensions in older Hanwell housing rewards knowing where the structure genuinely runs, which is rarely where the drawings suggest at a W7 address. GS Renovation allows for that in both the programme and the quotation. Ring 07472 424 226 and we will describe recent work in Ealing. The Hanwell survey is free, and GS Renovation will say plainly if house extensions at a W7 address is difficult.

Will my Hanwell side-return extension need planning permission?

It depends on the property. Many single-storey side-return and rear extensions on unaltered Hanwell terraces fall under permitted development within the size limits, so no planning application is needed. Larger, double-storey or conservation-area schemes usually require permission from Ealing Council. Either way the work must meet building regulations, and a shared party wall means a party wall notice. We assess your house first.

Can you take on house extensions in Acton as well as Hanwell?

Yes, Acton is well within the patch. House extensions runs across Hanwell, the surrounding Ealing and the areas between them, so neither address is a stretch. GS Renovation charges nothing for the survey at a W7 property or anywhere else nearby. Ring 07472 424 226 and we will confirm availability for both. Building control is coordinated with Ealing Council on each of them. Small jobs at either address are quoted on exactly the same basis.

Every Service, One Team

More GS Renovation Services in Hanwell

The same trusted team, 30+ years' hands-on experience and free, no-obligation quotes apply to every GS Renovation service in Hanwell. Explore what else we do locally:

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

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