House Extensions Redbridge

GS Renovation plans and builds extensions across Redbridge, adding space to the interwar semis of IG2, IG4 and IG5 and the Edwardian terraces of Ilford and South Woodford. We handle groundworks, steel beams, roofing and the full fit-out, and we advise honestly on whether your project is permitted development or needs planning permission.

In Redbridge, a single-storey rear extension typically starts from £40,000, or £2,000 to £2,800 per m² (indicative London ranges, Architecture for London, Resi, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Redbridge: the structural engineer we appoint designs the structure, we build it, and building control signs it off.

Rear and side extensions in Redbridge

The generous plots on many Redbridge streets suit both rear and side-return extensions, and the wider side access on a 1930s semi often makes a side or wrap-around addition realistic here in a way it rarely is on a tight terrace. A single-storey rear extension typically opens the kitchen onto the garden, while a double-storey addition can add a bedroom and en-suite above. Most kitchen extensions here take one of two forms: a single-storey rear addition on a semi, or a side return infill on an Edwardian terrace, with the old back wall replaced by steel so kitchen, dining space and garden read as one room. Each starts with proper foundations and groundworks matched to the local clay subsoil.

Where the extension meets the existing house, we usually remove the rear wall and support the structure on a steel beam sized by the engineer. Party wall matters come into play whenever you build near or up to the boundary you share with the adjoining semi, so you serve the notices early as building owner, using the drawings we give you. We then take the shell through to a finished room, with insulation, glazing, heating, electrics and decoration completed to building regulations.

Housing in Redbridge

Of the 108,080 homes the valuation list records in Redbridge, 27% were built before 1919, 34% between the wars and 38% since 1945; 36% are flats and 64% are houses. A rear extension on a terrace in Redbridge digs foundations close to both neighbours, so notices to both are normal, and 42% of homes here are terraced.

Designing a Redbridge extension to the subordinate test and conservation rules

Redbridge's Local Plan household extensions policy supports householder development that is subordinate to the existing building in terms of size, scale or height. On a Redbridge semi with a long garden, that is the test a two storey rear extension is judged against once it goes past permitted development. A ridge set below the main roof, a first floor held in from the side wall and a depth that reads as an addition all help. We ask the designer to show the extension against the existing house in elevation early, because an addition that competes with the house is harder to support under that policy. A redesign after submission moves the steel and the foundations with it.

Conservation areas close off the shortcuts. The Wanstead Grove Conservation Area Appraisal and Management Plan says side extensions in conservation areas need planning permission, as do all two storey rear extensions. Redbridge's planning fast track is not available for sites in a conservation area and must relate to a single dwellinghouse. So an owner in Wanstead Grove planning a side infill or a two storey rear addition should expect a standard householder application, without the fast track. A flat owner anywhere in the borough cannot use the fast track either. We set the build start from the likely decision date, not from the day the drawings are finished, and we hold the steel order until the permission is issued.

Planning and permitted development in Redbridge

Many single-storey rear extensions on Redbridge semis fall under permitted development, meaning you can build within set size limits without a full planning application. But it depends on the property. Homes near Wanstead Park or in a conservation area, corner plots, and larger double-storey schemes often need planning permission from Redbridge Council. We assess your specific house first, and where permitted development applies we recommend a lawful development certificate to record it.

Planning permission and building regulations are two separate approvals, and every extension needs building control regardless of the planning route. Building control checks the foundations, the structure, insulation, fire safety and drainage as the work proceeds. We coordinate both strands for you, from your designer's drawings and the application to Redbridge Council through to the final sign-off, so you are left with a properly documented extension and no loose ends when it is time to sell.

Kitchen extensions in Redbridge

66% of the houses in Redbridge are terraced. On a terrace the kitchen extension is built out from the back, into the side return where the house has one or across the full rear width, and a steel beam takes the old back wall so the kitchen and the new room become one space. The fit-out is priced on its own page, kitchen renovation in Redbridge; the build figures are in the table above.

Double storey extensions in Redbridge

Under permitted development a two-storey rear extension can go no more than 3 metres beyond the original rear wall and must stay at least 7 metres from the rear boundary, and in a conservation area it is not permitted development at all. Many gardens are too short for the 7 metre rule, so a double storey extension in Redbridge often needs planning permission from Redbridge Council. On the 42% of homes that are terraced, the neighbours' windows usually decide the depth. Redbridge Council says the borough has 16 conservation areas (council source). Our double storey extension page explains the build, at £1,800 to £2,600 per m² across both floors.

• First fix and second fix plumbing and electrics throughout
• Building control inspections at foundation, damp course and steel stages
• Drainage diversion and build-over agreements with the water authority

VOA Council Tax stock of properties, March 2025, for all 33 statistical areas in Redbridge. Counts rounded by the VOA.

When comparing house extensions in Redbridge with other work, it helps to read RSJ and steel beam installation in Redbridge, our Redbridge area guide, double storey extensions, garage conversions in London, our London house extensions page and Getting Planning Permission.

Trusted House Extensions in Redbridge

Homeowners across Ilford, Wanstead and Woodford choose GS Renovation because we build the whole extension, from the footings to the final coat of paint, with one team accountable throughout. We handle the engineer, the Redbridge Council submissions and building control, and our founder's 30+ years on the tools means we understand exactly how Redbridge's terraces and semis are built.

• Permitted development checked before you pay for a planning application
• Programme planned around party wall notice periods before excavation near a neighbour
• Structural engineer instructed and coordinated on your behalf

Reviewed jobs near Redbridge

2 MyBuilder reviews from Wanstead and Woodford Green, with each customer's own job title:

• Install new kitchen, plumb appliances & re-tile walls, Wanstead, 27 Jul 2022 (5 out of 5)
• New en-suite, Woodford Green, 25 Mar 2018 (5 out of 5)

Read all 31 on our reviews page.

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Structural design is by the consulting engineer appointed to your project.