Open-plan kitchen, diner and living conversions in Forest Hill. Trusted, professional, 30+ years' hands-on experience.
GS Renovation creates open-plan living across Forest Hill, turning the compartmented rooms of SE23's Victorian and Edwardian terraces into kitchen-diners and light-filled spaces. With more than 30 years of structural experience in South East London, we handle the steelwork behind every knock-through, from full open plan to broken-plan layouts with Crittall dividers.

The classic Forest Hill layout, two receptions front and back with a kitchen in the closet wing, was never built for open living. Knocking the two reception rooms into one, or opening the rear reception through to the wing, means removing walls that carry the floors and masonry above, so every knock-through here is a structural job with a steel beam at its heart, not simply a matter of taking out brick.
Our engineer sizes the steel for the span and the load, and it bears onto padstones at each end, often with the party wall carrying one side. We prop the structure, remove the wall in safe stages, and set the beam before the props come out. Flush-fitted steel lets us keep ceiling height and, where you want it, the original cornice and picture rails running through the opened space.
Not everyone wants one big room, and in these SE23 terraces broken-plan often works better. We create wide structural openings and then define zones with Crittall-style glazed dividers, so the kitchen-diner reads as one bright space while keeping cooking smells and noise in check. The glazed screen is non-structural, but the opening it sits within still needs a properly designed and installed beam above it.
Every open-plan conversion here is governed by the Building Regulations, so Lewisham Council's building control inspects the beam and its bearings and signs off; this internal work needs building control rather than planning permission. Where the new opening reaches into the shared party wall with your neighbour, the Party Wall Act applies and you serve notice first, then run the whole project through as one job.
For open-plan conversions in Forest Hill, GS Renovation delivers one accountable team from first drawing to sign-off. We engineer and install the steel, form the openings for your kitchen-diner or Crittall divider, serve any party wall notices on neighbours, and clear Lewisham building control. Dust-controlled, sequenced working in your occupied SE23 home is standard, backed by 30+ years locally.
Really happy with the quality of remedial works carried out by George in putting other previous tradesman work right. He was very helpful, honest and…
The kitchen has been fitted to the high standard. Saaid was polite, professional, tidy, he pays attention to a little details that make huge…
Built a new extension at rear of property. Laid foundations, drainage, raised floor, new roof and completed all fixtures and interior decoration…
FAQ
No. Open-plan conversion is priced from scope, so a Forest Hill home is not quoted higher than the same house over in Catford. Where costs do rise is in period stock and awkward access, both of which are checked at the SE23 property. GS Renovation shows those as separate lines so you can see the reason. The SE23 survey costs nothing and there is no obligation afterwards, in Forest Hill or anywhere in Lewisham. 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.
Longer than the build alone, because approvals come first. An open-plan conversion project at an SE23 address needs the engineer's design where the structure requires it, then a Lewisham Council application, before the Forest Hill programme begins. GS Renovation runs those in parallel wherever possible. The survey costs nothing and is the quickest way to get real dates in Lewisham. Ring 07472 424 226 and we will explain which Lewisham Council route suits your SE23 property best.
Straight away and in writing, which is the only approach that survives a dispute. If the structure at your SE23 address is not what the survey suggested, GS Renovation stops, brings the engineer back where open-plan conversion requires it, and re-prices honestly. The Forest Hill programme is reissued. Weekly updates mean a Lewisham client never hears bad news late. Ring 07472 424 226 and we will explain the process. Weekly Lewisham updates on the SE23 job keep surprises out of it.
Where the dividing walls are non-structural partitions, usually yes, but the lease and the freeholder's licence to alter come first. In an SE23 flat we confirm with an engineer what is carrying load before agreeing any layout.
Yes, and it is the sort of property we are on most weeks. Open-plan conversion at an SE23 address of that age needs the structure confirmed before design, so GS Renovation appoints an engineer where the work requires one and builds to their specification. Lewisham Council inspects at the defined stages. The Forest Hill survey costs nothing and carries no obligation. Ring 07472 424 226 and we will describe recent open-plan conversion projects on similar SE23 houses in Lewisham.
For internal open-plan work, no. Knocking rooms together in an SE23 terrace is governed by the Building Regulations, so Lewisham building control inspects and signs off the steelwork rather than planning. Planning only comes in for exterior changes in a conservation area or on a listed building. Where the opening affects the party wall, we also serve a party wall notice.
There is no part of Forest Hill we would exclude. Open-plan conversion is carried out throughout the area and the SE23 area and across neighbouring Lewisham, on terraces, semis and flats alike. GS Renovation knows how bay-fronted Victorian and Edwardian terraces with rear closet wings and side returns are built, which is what makes an SE23 quotation accurate. Email info@gsrenovationltd.co.uk and we will book a free survey. Building control goes through Lewisham Council in the usual way. Small jobs and whole-house programmes are both quoted on the same basis.
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 Forest Hill. Explore what else we do locally:
Same Service, Nearby Areas
We carry out open-plan conversion across Forest Hill and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for open-plan conversion in Forest Hill. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.