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House Extensions Southall

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

GS Renovation designs and builds extensions across Southall, where 1930s semi-detached and interwar houses sit on the generous plots that make additions so worthwhile. With over 30 years of experience in the UB1 area, we handle foundations, steel, roofing and full fit-out, and we guide you through Ealing Council planning from the very first drawing.

House Extensions in Southall, London by GS Renovation
House Extensions by GS Renovation in Southall.

Rear and side-return extensions in Southall

The wide plots typical of Southall's interwar semis lend themselves to single and double storey rear extensions, side-return infills down the flank, and wrap-around schemes that combine the two. We start with proper groundworks, digging and pouring foundations to suit the ground and the neighbouring structures, then build up in blockwork and brick to match the character of the 1930s stock. Steel beams tie the new opening back to the existing house so the ground floor flows as one space.

Because these semis are attached, a rear or side extension often runs alongside a shared party wall, so party wall notices to the adjoining owner are usually part of the job. We manage the roof works, the glazing, the insulation and the internal fit-out through to decoration, so you deal with one team from footings to finish. The generous Southall gardens mean you can extend meaningfully and still keep a proper outdoor space.

Planning and permitted development in UB1

A key early question in Southall is whether your extension falls under permitted development or needs a full planning application to Ealing Council. Many single storey rear extensions on interwar semis can proceed under permitted development rights, subject to size, height and boundary limits, but double storey and wrap-around schemes, or homes where those rights have been removed, usually need planning permission. We assess your specific UB1 property before committing to a design.

Whichever route applies, all the structural work is governed by building regulations, so foundations, steel beams, drainage and insulation are inspected and signed off by building control. We prepare and submit the paperwork, liaise with the council and coordinate the party wall side with your neighbours. Getting the consents right at the start protects you later, especially when you come to sell a home in the settled residential streets around Southall and Hanwell.

  • Foundations, groundworks and steel frames
  • Full fit-out, finishing and making good
  • Architectural drawings and structural coordination
  • Single and double storey extensions
  • Side-return and rear extensions
Service areaSouthall · UB1
Local authorityEaling Council
Part ofWest London (Outer London)
Typical homes1930s semi-detached and interwar suburban houses on generous plots
Also covered nearbyActon, Hanwell and Ealing

Why Southall Homeowners Choose GS Renovation

Southall homeowners choose GS Renovation because we build the whole extension and manage the consents. We tell you honestly whether your scheme is permitted development or needs an Ealing Council application, we handle foundations, steel and party wall notices, and building control signs off the structure. With 30+ years on West London interwar homes, you get one team accountable from footings to final decoration.

  • Free, no-obligation quotations
  • Over 30 years of hands-on experience
  • Dedicated project management
  • Fully insured and guaranteed work
  • Building control and planning support
  • Clean, tidy and reliable tradespeople
30+ YearsExperience
Fully Insured& Guaranteed
500+ ProjectsCompleted
Building ControlCompliant
Free QuotesNo obligation
Reviews

Rated 4.9 / 5 by our clients

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

★★★★★
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.
OscarCrofton Park, London · via MyBuilder
★★★★★
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.
KathWood Green, London · via MyBuilder
★★★★★
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!
Adil KhanWoolwich, London · via MyBuilder
Read all 31 reviews on MyBuilder

FAQ

Frequently Asked Questions about House Extensions Southall

How much does house extensions cost in Southall?

Pricing house extensions in Southall comes down to the size of the job, the specification you choose and the condition of the property. Rather than guess, we survey and give you a fixed, itemised quote you can rely on. Call 07472 424 226. 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.

How long does house extensions take in Southall?

How long house extensions takes in Southall depends on the size of the job, but we always agree a programme before starting and stick to it, keeping you informed from the first day to the last.

Why choose GS Renovation for house extensions in Southall?

Southall homeowners choose GS Renovation for reliability and quality. We are fully insured, building control compliant where needed, and bring over 30 years of hands-on experience to every house extensions project, with a single point of contact throughout.

Do I need planning permission for an extension in Southall?

Many single-storey rear extensions in Southall 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.

Do you work on 1930s and interwar homes in Southall?

Yes. A large share of Southall's homes are 1930s and interwar properties, and we renovate them regularly. We plan each house extensions around their particular characteristics, such as cavity walls, regular original layouts and the generous plots that suit extending, so the result suits the building and meets building control.

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

It depends on the property. Many single storey rear extensions on Southall interwar semis fall under permitted development, subject to size and height limits, but double storey and wrap-around schemes, or homes where those rights have been withdrawn, usually need a planning application to Ealing Council. We check your specific UB1 property first. Either way, the structural work is inspected and signed off under building regulations.

Do you cover all of Southall?

Yes, Southall is one of our core areas. We work on every street and the UB1 area and across the wider West London, so wherever your home is, call 07472 424 226 and we will confirm we can help.

Every Service, One Team

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

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Contact GS Renovation today for a free, no-obligation quote for house extensions in Southall.

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