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 you 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 and building control, and 30+ years in South East London means fewer surprises on your DA6 site.
He was very very good. He just got on with the job and we was beey pleased with the result. He Also cleaned everything away when he finished. Will…
George was brilliant. Lovely bloke, very reasonably priced and a perfectionist to boot. He completed our small kitchen renovation with care and great…
Giorgio is an excellent and intelligent workman, and with very reasonable prices! He installed a kitchen extractor fan in a complicated situation…
FAQ
It covers the whole job through to sign-off. The document lists the structural work, the trades that follow, the Bexley Council inspections and the making good at the DA6 property, with the engineer's fee shown where house extensions need a design. Site protection and the daily clear-up are included. GS Renovation issues it in writing so a Bexleyheath homeowner has something to hold us to. Ring 07472 424 226 for a sample Bexley layout before the DA6 survey. 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.
Faster than most people assume, provided the survey is done early. The lead time on house extensions at a DA6 property is usually approvals and materials rather than labour, so GS Renovation starts both as soon as the Bexleyheath scope is signed off. Seasonal demand across Bexley does move it. Email info@gsrenovationltd.co.uk for the current position on 1920s and 1930s suburban properties. The DA6 survey is free and there is no obligation afterwards in Bexleyheath.
We hand over, clear the site, and stay contactable. The house extensions work at a DA6 address ends with a final Bexley Council inspection, the certificate you will need when the Bexleyheath property is sold, and a walk round with your project manager. GS Renovation then holds the five year guarantee on installations. Ring 07472 424 226 if anything needs looking at afterwards, anywhere in Bexley. Aftercare in Bexleyheath goes to the same Bexley team.
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 permission. We assess your DA6 property and manage both the Bexley Council application and building control.
Rarely, because we expect what the stock throws up. 1920s and 1930s suburban houses with cavity walls and original hipped roofs bring aged materials, uneven floors and occasional unauthorised previous work, none of which stops house extensions at a DA6 address but all of which affect the programme. GS Renovation allows for them in the Bexleyheath quotation. Bexley Council inspects the structural work either way. GS Renovation will happily describe what house extensions usually reveals once a DA6 property in Bexleyheath is opened up properly on site.
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.
The whole borough, and beyond it. House extensions take GS Renovation across Bexleyheath, Sidcup and much of South East London in a normal month, and there is no surcharge for a DA6 address in one part of Bexley over another. Building control goes through Bexley Council either way. Ring 07472 424 226 to confirm your street. The survey that follows is free and carries no obligation. Small jobs and full projects are quoted on the same written basis.
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:
Same Service, Nearby Areas
We carry out house extensions across Bexleyheath and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for house extensions in Bexleyheath. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.