GS Renovation designs and builds extensions across Islington, from Highbury's Victorian terraces to converted warehouses near Old Street and Clerkenwell. With more than 30 years working in N1, N5, N7, N19 and EC1, we handle foundations, steelwork, roofing and fit-out, and we tell you straight whether your project is permitted development or needs planning permission from Islington Council.
Rear and side-return extensions in Islington
The side return on an Islington Victorian terrace is often dead space, a narrow strip beside the rear closet wing that lets little light in. Filling it, and extending across the back, turns a cramped kitchen into a wide, open living space. We dig and pour foundations to suit the ground, install the steel beams that carry the existing rear wall, and tie the new roof and glazing into the original house neatly.
Because these terraces sit shoulder to shoulder, a rear extension almost always involves the party wall, so notices go to the neighbours before groundworks begin. Many single-storey rear extensions fall under permitted development, but conservation-area status across much of Islington, or a listed building, can remove those rights and require a planning application. We assess your specific address early, so you know which route applies before any design is finalised.
Double storey and wrap-around Islington projects
On the larger plots around Highbury Fields and Holloway, a double-storey or wrap-around extension can add a proper kitchen-diner below and a bedroom or bathroom above. These schemes carry more load, so the steel design and foundations matter even more, and they almost always need a full planning application to Islington Council rather than falling under permitted development. We handle the drawings, the structural calculations and the build under one roof.
Warehouse and Clerkenwell conversions play by different rules. Many are leasehold flats where structural change needs the freeholder's licence to alter and coordination with the managing agent, and building-management rules on sound insulation between flats still apply. We work within those constraints, keeping neighbours informed and the block's conditions met. Whether your extension is a house at the back or a reconfiguration inside a converted building, we build to Building Regulations and get it inspected.
- Full fit-out, finishing and making good
- Building control inspections at foundation, damp course and steel stages
- Bi-fold, sliding and French door openings to the garden
- Levels, drainage and landscaping made good around the new build
- Insulation, airtightness and thermal detailing to regulations
Why Choose GS Renovation in Islington
Islington homeowners choose GS Renovation because we deliver the whole extension, design, groundworks, steel, roof and finish, with one team accountable throughout. After 30-plus years across N1, N5, N7 and N19, we know the borough's terraces, conservation areas and party wall demands. We guide you honestly on permitted development versus planning, and we build to last.
- Clean, tidy and reliable tradespeople
- Waste cleared as we go, not left piled in the garden
- Aftercare and snagging support once the job is finished
- Building control inspected at foundation, damp course and steel stages
- Site left safe and secure at the end of every day
- Insulation and thermal detailing to current regulations