Home About Services Areas Projects Blog Contact 07472 424 226

House Extensions Barnes

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

GS Renovation designs and builds extensions across Barnes, adding space to the bay-fronted Victorian and Edwardian terraces and substantial family homes of SW13. With over 30 years in South West London, we handle everything from foundations and steelwork to roofing and fit-out, and we advise clearly on whether your project is permitted development or needs planning permission from Richmond Council.

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

Side-return and rear extensions in Barnes

The most requested extension in Barnes fills the side return beside the rear closet wing, turning a cramped galley kitchen into an open-plan kitchen-diner running the width of the house. We dig and pour new foundations to suit the ground and any nearby trees, tie the brickwork into the existing Victorian wall, and carry the structure over on steel. A glazed roof or roof lantern brings light into what was a dark middle room.

Many single-storey rear and side-return extensions on Barnes terraces fall under permitted development, but this is never guaranteed. Size limits, how close you are to the River Thames or a conservation area, and the specific property all affect it, so some schemes need a full planning application to Richmond Council. We check the position for you, prepare the drawings, and manage the submission, whichever route your Barnes home takes.

Double-storey extensions on Barnes family homes

On the larger family homes of SW13, a double-storey rear extension adds a bigger kitchen below and a bedroom or en-suite above in one build. We match the foundations and brickwork to the existing house, install the steel to carry the new floor and roof, and tie the roofline in so the addition looks original to the property. This suits families staying in Barnes who need more room without moving away from Richmond Park and the river.

A two-storey extension almost always needs planning permission from Richmond Council rather than falling under permitted development, and where it sits on a shared boundary the Party Wall Act applies too. We manage the planning drawings, the structural design and the party wall notices together, then build the shell, weatherproof it, and complete the full fit-out. From dig to decoration, one Barnes team stays accountable for the whole project.

  • Planning permission and permitted development
  • Foundations, groundworks and steel frames
  • Full fit-out, finishing and making good
  • Architectural drawings and structural coordination
  • Single and double storey extensions
Service areaBarnes · SW13
Local authorityRichmond Council
Part ofSouth West London (Outer London)
Typical homesBay-fronted Victorian and Edwardian terraces with rear closet wings and side returns
Also covered nearbyTwickenham, Teddington, Kew and Richmond upon Thames

Why Barnes Homeowners Choose GS Renovation

Families in Barnes choose GS Renovation because we deliver the whole extension under one roof, from groundworks and steel to planning drawings and the final coat of paint. We know how SW13 terraces and family homes are built, we handle Richmond Council submissions and party wall matters, and 30+ years of experience means fewer surprises and a build that adds real value.

  • 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 Barnes

How much does house extensions cost in Barnes?

The cost of house extensions in Barnes depends on the size of the property, the specification and the scope of work. GS Renovation provides free, detailed and itemised quotations for every Barnes 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.

How long does house extensions take in Barnes?

We will give you an honest timescale for house extensions in Barnes 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.

Why choose GS Renovation for house extensions in Barnes?

GS Renovation's team brings over 30 years of hands-on experience to house extensions and wider building work across Barnes and the surrounding area. We offer free quotes, a dedicated project manager, full insurance, building control compliance where required, and comprehensive aftercare.

Do I need planning permission for an extension in Barnes?

Many single-storey rear extensions in Barnes 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 Victorian and Edwardian terraced homes in Barnes?

Yes. A large share of Barnes'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.

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

It depends on the property. Many single-storey rear or side-return extensions in Barnes are permitted development, but factors like size, being near the River Thames, or falling within a conservation area can mean you need a full planning application to Richmond Council. Two-storey extensions almost always need permission. We assess your SW13 home first and handle whichever route applies, plus the building control side.

Do you cover all of Barnes?

We do. GS Renovation covers all of Barnes and the SW13 area and the wider South West London. Call 07472 424 226 and we will confirm we work on your road.

Every Service, One Team

More GS Renovation Services in Barnes

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

Same Service, Nearby Areas

House Extensions Near Barnes

We carry out house extensions across Barnes and the surrounding areas. Explore a nearby location:

Ready to Start Your Barnes Project?

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

Get Your Free Quote
Call 07472 424 226