Single and double storey extensions in Southgate. Trusted, professional, 30+ years' hands-on experience.
For over 30 years GS Renovation has extended Southgate's interwar semis and detached houses, the kind of 1930s homes in N14 that sit on generous plots with room to grow. Whether you want a rear kitchen extension, a side infill or a double storey addition, we handle groundworks, steel, roof and fit-out as one project.

The generous plots typical of Southgate's interwar houses often leave a gap down the side of the semi and a decent rear garden, which makes side-return and wrap-around extensions a natural fit. We dig and pour foundations to suit the ground, tie the new structure into the existing 1930s brickwork and install the steel beams needed where we open the back of the house into the new space.
A double storey extension adds a bedroom or en-suite above a larger kitchen below, and on these plots there is frequently space to do both. We match the roof line and the brick as closely as the original allows, upgrade insulation to current standards and manage the trades in sequence. Every extension is built to the building regulations and inspected by Enfield Council's building control as the work proceeds.
Not every extension in N14 needs planning permission. Many single storey rear extensions fall under permitted development, but that depends on your specific house, whether it has already been extended and how close you are to a boundary. Larger, double storey or wrap-around schemes usually need a full planning application to Enfield Council. We assess your property first and tell you honestly which route applies.
Because a Southgate semi shares a party wall with the house next door, digging foundations near it or building off it brings the Party Wall Act into play, so we serve the right notices early. Alongside that we handle the building regulations submission, which covers the structure, insulation, drainage and fire safety. Keeping planning, party wall and building control on track from the start avoids the delays that stall extensions.
Homeowners in Southgate choose GS Renovation because we run the whole extension, from foundations and steel to roof and final decoration, without juggling separate firms. We advise clearly on permitted development versus a planning application, handle party wall notices with neighbouring semis and keep Enfield Council's building control inspections on schedule. Thirty years across N14 means we know how these interwar houses extend well.
George was brilliant. Lovely bloke, very reasonably priced and a perfectionist to boot. He completed our small kitchen renovation with care and great attention to detail. I've already recommended him to others.
Splendid job on our new kitchen refurb, including new flooring, moving the services, installing RSJ and preparing space for new back doors… George was always friendly, communicative and has an excellent attention to detail, ensuring everything is finished to a high standard.
Giorgio is an excellent and intelligent workman, and with very reasonable prices!… He paid a lot of attention to detail that is not common at all, and the final result was immaculate. Highly recommended!
FAQ
Every Southgate project is priced on its own merits, as the cost of house extensions varies with the size, specification and condition of the home. We give a clear, itemised quote up front with no obligation. Call 07472 424 226 for an estimate tailored to your property. 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.
Timescales for house extensions in Southgate vary with the size and complexity of the job. After our survey we give you a realistic schedule and keep you updated at every stage of the project.
GS Renovation knows Southgate's homes and how to renovate them properly. We handle the structure, the services and the finishes, deal with building control for you, and leave you with work that is certified, guaranteed and built to last.
Many single-storey rear extensions in Southgate fall under permitted development, but side returns, double-storey extensions and work in conservation areas usually need full planning permission. We assess your property and manage both the planning application and building control.
Yes. A large share of Southgate's homes are 1930s and interwar properties, and we renovate them regularly. We plan each house extensions around their particular characteristics, such as cavity walls, regular original layouts and the generous plots that suit extending, so the result suits the building and meets building control.
It depends on your house. Many single storey rear extensions on Southgate's interwar plots are permitted development, but if your home has been extended before, sits near a boundary, or you want a double storey or wrap-around, you will likely need a planning application to Enfield Council. We check your property's history and constraints, then advise the correct route before any work begins.
We cover the whole of Southgate and the N14 area and the surrounding North London. If you are nearby and not sure, just call 07472 424 226 and we will tell you straight away.
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 Southgate. Explore what else we do locally:
Steel beam installation, RSJ and structural alterations.
Safe load-bearing wall removal with steel beam support.
Structural alterations, new openings and steel support.
Chimney breast removal with gallows bracket or beam support.
Open-plan kitchen, diner and living conversions.
Full refurbishments and whole-house renovations.
Bespoke kitchen design and installation.
Luxury bathroom and wet-room refurbishment.
Same Service, Nearby Areas
We carry out house extensions across Southgate and the surrounding areas. Explore a nearby location:
Contact GS Renovation today for a free, no-obligation quote for house extensions in Southgate.
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