Open-plan kitchen, diner and living conversions in Hemel Hempstead. Trusted, professional, 30+ years' hands-on experience.
GS Renovation opens up ground floors in Hemel Hempstead, taking out the walls between kitchen, dining and living space and carrying the load on steel. The house decides the method, and Hemel Hempstead holds two very different kinds of house. We appoint the engineer, build to the design, and finish the room rather than handing it over as a shell.

It changes what you find behind the plaster. Hemel Hempstead officially became a New Town on 4 February 1947. The first new residents moved into Adeyfield in February 1950, the first four families on 8 February 1950. By autumn 1952, 300 houses at Bennetts End were occupied. Grovehill began construction in 1967 and was completed in stages by the early 1980s, and Woodhall Farm was built in the mid to late 1970s, on the former Brock's fireworks site.
Thirty years separate the earliest of those neighbourhoods from the latest, and construction changed a great deal over that period. Floor construction, wall build-ups and roof structure in a 1950 house are not those of a 1975 house. We survey the actual building rather than working from the address, and the engineer's design follows what is found once the ceiling and floor are opened.
There the structure is older and less predictable. The character statement records that the local vernacular is hidden behind plaster, render or brick, with earlier timber framed buildings refronted or partially rebuilt. It also records that exposed timber framing is rare, frames having been modernised with the addition of 18th or 19th century brick skins. Opening a wall there can expose a historic frame rather than the masonry a drawing assumed.
Plan form matters as well. The character statement identifies the historic grain of plot division, with small buildings running down the plot rather than across it, as a very important part of the Old Town's character. It describes rear extensions to High Street buildings as tall narrow gables projecting perpendicular to the building line. An open plan layout in a footprint like that is a long narrow space, and the steel arrangement has to suit it.
Two limits catch open plan projects that also extend. In the Hemel Hempstead conservation area, planning permission is required for any extension that would extend beyond a wall forming a side elevation of the original house. Permission is also required for an extension of more than one storey that would extend beyond the rear wall of the original house. If your knock through is paired with a side return or a two storey rear addition, that is a planning application before it is a structural job.
Purely internal work is a different matter, dealt with under Building Regulations. We separate the two at survey, so you know which consents apply and in what order. Where an application is needed, the structural design is prepared to suit the scheme that gets permission, rather than the other way round.
An open plan ground floor is several jobs in one order, and GS Renovation carries all of them: the engineer we appoint, the steel, the flooring, the ceilings, the electrics and lighting, the kitchen fit and the decoration. That means the people who opened the room are the people who level, square and finish it, so there is no gap where one trade blames another. We are fully insured, registered in England under company number 14611254, and rated 4.9 from 31 reviews on MyBuilder.
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…
George is a very hard working builder, and has done a fantastic job on replacing my Bathroom. His attention to detail was great and I wouldn't…
He was very very good. He just got on with the job and we was beey pleased with the result. He Also cleaned everything away when he finished. Will…
FAQ
Three things drive it: how much structure is involved, how difficult access is at the HP1 address, and what making good takes afterwards. All three appear separately in the open-plan conversion quotation for your Hemel Hempstead property. Interwar semi-detached houses tend to move the third of those, because materials and dimensions are rarely regular. GS Renovation prices each element rather than averaging across Hemel Hempstead. Ring 07472 424 226 and we will explain which of them dominates at your HP1 address. 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.
Yes. Opening a ground floor into the stair enclosure changes the escape route, so the alternatives are settled with the inspector before any wall comes down. Building control for Dacorum is Hertfordshire Building Control on 01438 879990, not the council itself, so that conversation happens there. Interlinked alarms, a protected route or a door in a different position can all follow, and we price the answer rather than leaving it open.
It depends on the floor above, and the engineer decides it. A flush beam sits within the joist depth, which means cutting into the existing floor and hanging the joists off the steel, so the floor construction has to suit that. It is settled by opening up rather than from a drawing. Either way the beam and its bearings must be visible at the final inspection, which needs 24 hours notice.
It can, and that authority is separate from Building Regulations. In a Dacorum conservation area, written authority is needed to demolish or partly demolish a building larger than 115 cubic metres in volume, including some garden walls and chimneystacks. The Hemel Hempstead conservation area was originally designated on 7 October 1968, with a boundary amendment adopted on 21 January 2014, so the boundary is checked against your address before the scope is fixed.
The building control completion paperwork for that work. It is why the first notice matters: Hertfordshire Building Control requires commencement to be notified through the Submit a Plan portal before building work begins, and requires 24 hours notice for the final inspection. Work that was never notified is far harder to evidence at sale. We coordinate both notices and hand the paperwork over with the engineer's calculations at the end.
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 Hemel Hempstead. Explore what else we do locally:
Same Service, Nearby Areas
We carry out open-plan conversion across Hemel Hempstead and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for open-plan conversion in Hemel Hempstead. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.