Single and double storey extensions in Bexleyheath. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds house extensions throughout Bexleyheath, making the most of the generous plots that came with its 1930s semi-detached and interwar homes. With over 30 years of experience across DA6, we handle groundworks, steelwork, roofing and a full fit-out, guiding you through Bexley Council permissions from the first sketch.

Interwar Bexleyheath houses were built on wider plots than inner-London terraces, so there is often real room to extend at the rear or fill in the side passage of a semi. A single-storey rear extension opens the kitchen onto the garden, while a wrap-around adds a proper kitchen-diner. We dig and pour the foundations, install the steel beams and tie the new roof neatly into the existing 1930s roofline.
Whether your extension is permitted development or needs a full planning application to Bexley Council depends on your specific property, its size and whether it has been extended before. We assess this at the outset so you know exactly which route applies before any work begins in DA6.
The width of many Bexleyheath interwar plots also suits a double-storey side extension, adding a downstairs room and an extra bedroom above without eating into the garden. On a semi this brings the party wall into play, so we serve the correct Party Wall Act notices on the adjoining owner and agree the works before we break ground.
We manage the whole build: foundations and groundworks, load-bearing steelwork, the new roof, windows to match the interwar character, and the full internal fit-out with plastering, electrics and heating. Building regulations govern the structure and insulation, and we book Bexley Council building control inspections at each key stage through to completion.
Homeowners across Bexleyheath choose GS Renovation because we run the extension from design to decoration as one project. We know how interwar semis are built, we handle planning versus permitted development, party wall notices and building control, and 30+ years in South East London means fewer surprises on your DA6 site.
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 Bexleyheath depends on the size of the property, the specification and the scope of work. GS Renovation provides free, detailed and itemised quotations for every Bexleyheath 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.
A straightforward Bexleyheath project can be done in a couple of weeks, while a larger house extensions with structural work runs longer. We set out a realistic, stage-by-stage programme before we begin so there are no surprises.
Bexleyheath 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.
Many single-storey rear extensions in Bexleyheath 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 Bexleyheath'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.
It depends on the property. Many single-storey rear extensions on Bexleyheath's generous interwar plots fall under permitted development, but size limits, previous extensions and any planning constraints can push a project into needing a full application to Bexley Council. We check your specific situation early, then handle either route along with the building regulations sign-off.
Absolutely. Our team works right across Bexleyheath and the DA6 area and neighbouring parts of South East London. Get in touch on 07472 424 226 to check coverage for your address.
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 Bexleyheath. 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 Bexleyheath and the surrounding areas. Explore a nearby location:
Contact GS Renovation today for a free, no-obligation quote for house extensions in Bexleyheath.
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