Single and double storey extensions in Becontree. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds extensions across Becontree, where the interwar suburban houses sit on the generous plots the 1930s estate was planned around. Those wider gardens in RM8 give real room to grow, and with 30+ years in Barking and Dagenham we take on the groundworks, the steel and the full fit-out as one project.

Because Becontree houses were laid out with space around them, single storey rear and side extensions are some of the most rewarding work we do in RM8. We dig and pour foundations sized to the ground conditions, build the walls and roof, and drop in a steel beam where the extension opens into the existing kitchen or reception to create a bright, open-plan space at the back of the house.
Double storey and wrap-around extensions suit the wider Becontree Estate plots too, adding a bedroom and en-suite above a larger kitchen-diner. We coordinate the structural engineer, the foundations, the drainage and the internal knock-through together, so the new and old parts of the interwar semi work as one home rather than a bolt-on.
An extension in Becontree may fall under permitted development, or it may need a full planning application to Barking and Dagenham Council, and which route applies depends on the size, height and position of what you want to build. We assess your specific house honestly at the survey stage and tell you clearly which path you are on before any drawings are commissioned.
Either way the build itself must meet building regulations, with inspections at foundation, structure and completion. Where a side extension runs up to the boundary or the works affect the shared party wall with a neighbouring RM8 house, the Party Wall Act applies, so you serve notices early and keep the whole project moving smoothly.
Becontree owners choose GS Renovation because we build extensions end to end, from the first trial hole to the final coat of paint. We advise whether your project is permitted development or needs a planning application to the council, manage the steel and building control, and draw on 30+ years across RM8. One accountable team, no gaps between trades.
Saiid did a complete refurbishment of our small bathroom. This involved ripping out the existing bath/shower, basin, toilet, pipework, and tiles and…
My husband and I are extremely pleased with the work. The standard of the work is outstanding and Saiid has a great eye for detail and will not leave…
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FAQ
Labour, materials, approvals and reinstatement, itemised line by line. Where house extensions need structural design, GS Renovation appoints and coordinates the engineer and builds to their specification at the RM8 property. The Barking and Dagenham Council fee appears on its own line rather than inside a round number. Becontree homeowners can therefore see exactly what a Barking and Dagenham quotation is buying. Ask GS Renovation on 07472 424 226 for a sample layout before the RM8 survey is even booked. 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.
Longer than the fastest quote you will be given, and shorter than an open-ended one. GS Renovation would rather set house extensions dates a Becontree homeowner can plan around than win the RM8 job on a programme nobody can meet. The stages, the trades and the Barking and Dagenham Council points are all written down. You are updated against them weekly throughout the Barking and Dagenham project. Ring 07472 424 226 and we will describe how a comparable RM8 project ran.
You get the scope in writing before anyone starts. The house extensions quotation for your Becontree home lists structure, trades, approvals and making good, and the programme names the weeks and the Barking and Dagenham Council inspection points at RM8. GS Renovation appoints and coordinates the structural engineer where the design needs one. Aftercare is a phone call to the same number, not a form. Ask on 07472 424 226 about Barking and Dagenham aftercare. The five year guarantee on installations applies in Barking and Dagenham too.
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 Becontree projects.
Sometimes, depending on where the property sits. House extensions in interwar semis and short terraces with hipped roofs and rear kitchens within a conservation area is usually possible but more constrained in form, and Barking and Dagenham Council will scrutinise anything visible from the street at RM8. GS Renovation handles the application and the negotiation. Internal work in a Becontree house is generally more straightforward. Ring 07472 424 226 and we will explain what Barking and Dagenham Council is likely to ask about house extensions at an RM8 address of that age.
It depends on the size and height. Many single storey rear extensions on Becontree's generous plots fall within permitted development, but larger, double storey or wrap-around builds often need a planning application to Barking and Dagenham Council. We review your specific RM8 house at survey and tell you which applies, then handle the building regulations side whichever route you take.
There is none, and it is worth asking even if the job feels too small. House extensions enquiries across Becontree range from a single opening to a whole-house programme, and GS Renovation quotes both on the same basis. The RM8 visit costs nothing and carries no obligation. Email info@gsrenovationltd.co.uk with a description and some photographs. Building control still goes through Barking and Dagenham Council where the work requires it. Small house extensions work at RM8 is quoted the same way.
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 Becontree. Explore what else we do locally:
Same Service, Nearby Areas
We carry out house extensions across Becontree and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for house extensions in Becontree. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.