Open-plan kitchen, diner and living conversions in Finchley. Trusted, professional, 30+ years' hands-on experience.
GS Renovation creates open-plan spaces in Finchley homes, opening up the compartmentalised rooms of 1930s semis into bright kitchen-diners and sociable living areas. With over 30 years across Barnet, we handle knock-throughs, broken-plan layouts and Crittall dividers in N3, engineering every opening properly so the interwar house above stays fully supported.

Interwar houses in Finchley were designed as a series of separate rooms, with the kitchen tucked at the back and a wall dividing it from the dining room. Knocking these together is the most popular project we do in N3, turning a dark rear kitchen into an open kitchen-diner that runs across the generous width of the plot. The dividing wall is usually load-bearing, so an engineer specifies the beam before anything comes down.
Not every family wants one big room. Broken-plan layouts keep a sense of zones using a half-height wall or a steel-framed Crittall screen, which suits the period character of these 1930s homes and lets light travel through while still separating cooking from living. Whether it is a full knock-through or a subtle divider, the structural principle is the same: support the load above on a correctly sized steel and padstones.
The steel beam that spans a knock-through is sized by a structural engineer, bears onto padstones set into sound masonry, and goes in behind temporary propping with the wall removed in staged, controlled sections. All of this is controlled under the Building Regulations and signed off by Barnet Council building control, not planning, so the internal reconfiguration itself does not need a planning application.
In a semi, the wall you are opening up often ties into the party wall shared with next door, so where the new beam bears into that shared wall the Party Wall Act applies and you serve notice on the neighbour. We coordinate the engineer, the building control inspections and the finishing trades, so your new open-plan Finchley space is delivered as one clean, compliant project.
Finchley families choose GS Renovation for open-plan conversions because one team manages the lot: engineer-sized steel to the adjoining semi, Barnet building control and the finished space. We know how these interwar N3 houses are built, protect the rest of your home while we work, and back every knock-through with more than 30 years of structural experience.
The kitchen has been fitted to the high standard. Saaid was polite, professional, tidy, he pays attention to a little details that make huge…
We loved working with George and Ibrahim and would highly recommend them. They have done splendid job on our new kitchen refurb which including new…
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…
FAQ
No, because everything foreseeable is on the quotation already. Open-plan conversion in 1920s and 1930s suburban housing around N3 occasionally reveals something behind plaster, and when it does we stop, cost it, and get your agreement before continuing at the Finchley property. GS Renovation carries the same approach across Barnet. Quotes are free and carry no obligation, whether the N3 property sits in Finchley or the wider North London, and the written figure follows within days. As a rough guide, open-plan conversion in London typically costs from roughly £3,000 to £8,000 or more, including the steel beam and finishing (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.
We start when we can see the job through. Taking on open-plan conversion at a Finchley property and then disappearing to another site is the commonest complaint about builders, so GS Renovation schedules the N3 project properly instead. Availability changes by season and by how many Barnet jobs are running. Call 07472 424 226 and you will get honest dates, not a holding answer. The N3 survey is free and puts a Finchley project into the Barnet schedule.
Accountability, mainly. The person who surveys your N3 property is answerable for what happens on the Finchley site, and open-plan conversion is delivered by our own team rather than sold on. GS Renovation is fully insured, coordinates Barnet Council building control, and gives you a five year guarantee on installations. The 31 MyBuilder reviews behind our 4.9 rating are public. Ask on 07472 424 226 for Barnet addresses to look at. The five year guarantee covers installations at N3.
It can, and it is worth planning for. One large space in an N3 property behaves differently to two small ones, so radiator sizing or underfloor heating is reconsidered as part of the Finchley conversion rather than left as it was.
Many times, and we can give you addresses. 1920s and 1930s suburban houses with cavity walls and original hipped roofs dominate that part of Finchley, so open-plan conversion on them is routine work for GS Renovation rather than something we adapt to. The 31 public MyBuilder reviews behind our 4.9 rating cover the same kind of project. Ring 07472 424 226 and we will point you at recent work in Barnet. Email info@gsrenovationltd.co.uk and we will send N3 addresses where open-plan conversion of this kind was carried out.
In most 1930s Finchley semis, yes. The dividing wall is usually load-bearing, so a structural engineer sizes a steel beam to carry the load, supported on padstones. It is a Building Regulations job signed off by Barnet building control, not planning. If the beam bears into the shared party wall, we also serve a party wall notice next door.
Almost certainly. The open-plan conversion patch extends well beyond Finchley and the N3 area, and what matters is whether GS Renovation can survey the property, run the programme and return for aftercare properly. Most of Barnet and the surrounding North London qualifies. Email info@gsrenovationltd.co.uk with the address and we will give you a straight answer. Nothing is owed for the N3 visit either way. Snagging afterwards is handled by exactly the same team that actually built it.
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 Finchley. Explore what else we do locally:
Same Service, Nearby Areas
We carry out open-plan conversion across Finchley and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for open-plan conversion in Finchley. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.