Single and double storey extensions in Chadwell Heath. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds extensions throughout Chadwell Heath, where 1930s semi-detached houses sit on the generous plots that make room to grow. With more than 30 years of building across RM6 and the Becontree area, we take your extension from foundations and steel to a fully finished, watertight space.

The wide plots typical of Chadwell Heath give interwar semis space at the side and rear that many inner London homes simply do not have. A single storey rear extension opens the back of the house into a large kitchen-diner, while a side infill uses the gap alongside the house. We start with proper foundations and groundworks, checking for drains and the ground conditions common across the Becontree Estate area.
A double storey extension adds a bedroom or en-suite above the new ground floor room, keeping the roofline in proportion with the original 1930s house. Wide openings between old and new usually need a steel beam sized by our structural engineer. Where the extension runs up to the boundary with your semi-detached neighbour, the Party Wall Act applies, and you serve the notices and manage that relationship.
Not every extension in Chadwell Heath needs planning permission. Many single storey rear extensions on interwar semis fall under permitted development, provided they stay within the size, height and boundary limits set nationally. Larger builds, most double storey work, and anything to the side or front usually needs a full planning application to Barking and Dagenham Council. We advise honestly on which route your specific plot and design require.
Planning permission and building regulations are two separate approvals, and every extension needs building control regardless of the planning route. Building control inspects the foundations, the steel, the insulation and the drainage as the work proceeds. We handle the drawings, the applications and the inspections, then complete the full fit-out, including plastering, electrics, heating, flooring and decoration, so you receive a finished room rather than a shell.
Chadwell Heath homeowners choose GS Renovation because we manage the whole extension under one roof, from the first drawing to the last coat of paint. We know how interwar semis in RM6 are built, how their plots behave and how Barking and Dagenham Council handles applications. Thirty plus years of local experience means fewer surprises and a build that lasts.
George did a great job on our new bathroom. He is a really friendly and helpful guy and always ready to discuss any issues or concerns and come up…
Excellent service. George's knowledge and skills are the best in the market. He knows what he is doing, does really high quality work, gives good…
George was a great find. The job required re-plastering the walls before fitting acrylic panels. He also re-plumbed the shower waste under the solid…
FAQ
Set aside the structural element, the finishing trades and the approvals as three separate amounts. That is how the house extensions quotation for a Chadwell Heath home is laid out, and it is why the RM6 survey happens before any figure is discussed. The engineer's fee, where house extensions need a design, is shown rather than buried. Ask GS Renovation on 07472 424 226 for the current position in Barking and Dagenham. The survey at the RM6 property is free, in Chadwell Heath and across Barking and Dagenham. 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.
Very little, provided the inspections are booked ahead. Barking and Dagenham Council needs to see the structural work on a house extensions job at an RM6 property before it is concealed, so GS Renovation schedules those visits into the Chadwell Heath programme rather than calling at the last minute. The completion certificate follows the final inspection. Waiting on paperwork in Barking and Dagenham is a planning failure, not an inevitability. GS Renovation attends every Barking and Dagenham Council inspection at the RM6 property on your behalf.
Communication is the difference most clients mention. You get a weekly update on the house extensions project at RM6, and if something changes on the Chadwell Heath job you hear it from GS Renovation first rather than at handover. The quotation is itemised and the programme is written. Neither is normal in this trade, and both are why Barking and Dagenham work keeps coming from referrals. Ring 07472 424 226 to discuss it. Ask on 07472 424 226 who would manage your Barking and Dagenham job.
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 Chadwell Heath projects.
We do, week in and week out. 1930s semi-detached and interwar suburban houses on generous plots make up much of Chadwell Heath, so house extensions on them is core work for GS Renovation rather than an occasional job. The RM6 survey establishes what is actually there before anything structural is touched. Barking and Dagenham Council building control is coordinated by us in the usual way. Ask on 07472 424 226 what an RM6 property of that age typically needs before house extensions can even begin in Chadwell Heath.
It depends on the size and position. Many single storey rear extensions on RM6 semis are permitted development and need only building regulations approval. Larger or double storey extensions usually require a planning application to Barking and Dagenham Council as well. Either way, building control must sign off the structure. We check your specific plot before any work starts.
Yes, both. House extensions in an RM6 flat brings the lease and the freeholder's consent into it, which is the main practical difference from a Chadwell Heath house, and GS Renovation will explain what applies before any design work. Building control still goes through Barking and Dagenham Council. Ring 07472 424 226, describe the block, and we will tell you what is involved. The survey across Barking and Dagenham is free either way. The freeholder's licence to alter comes first at RM6.
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 Chadwell Heath. Explore what else we do locally:
Same Service, Nearby Areas
We carry out house extensions across Chadwell Heath and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for house extensions in Chadwell Heath. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.