Open-Plan Conversions Belgravia

GS Renovation creates open-plan spaces in Belgravia's period homes, from knock-throughs between Regency reception rooms to kitchen-diners in the lower ground floors and mews houses near the West End. We turn these compartmented Georgian layouts into flowing spaces without compromising the building.

In Belgravia, a knock-through finished as one room typically costs £3,000 to £8,000 or more, including the steel beam (indicative London ranges, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Belgravia: the structural engineer we appoint designs the steel, we install it, and building control signs it off.

How the job runs

1. Free site survey at your Belgravia address, covering the walls, services and floor levels, and an itemised quote.
2. The engineer we appoint sizes the beam, and the work is registered with Westminster City Council building control or an approved inspector. On a shared wall you serve the party wall notice as building owner; we supply the drawings.
3. Props in, opening cut, beam on padstones; then floors, heating and electrics are joined up.
4. Building control inspects the steel before it is covered. We finish the room, and the completion certificate follows.

Opening up Belgravia's period layouts

Belgravia's townhouses were designed as a series of separate rooms stacked over several storeys, so opening them up almost always means removing a load-bearing dividing wall between two receptions or across a lower-ground kitchen. Whether you want a full knock-through, a broken-plan layout, a generous kitchen-diner or elegant Crittall dividers to zone the space, a structural engineer first confirms the load and sizes the steelwork.

The dividing wall is replaced with a steel beam bearing onto padstones, installed over temporary propping and taken out in staged sections so the floors above stay supported throughout. Crittall screens can then be set beneath a flush beam to keep light flowing while defining a kitchen or study. We keep original cornices, shutters and other period detail intact wherever the design allows.

Housing in Belgravia

Of the 6,020 homes the valuation list records in the Knightsbridge, Belgravia & Hyde Park statistical area, 67% were built before 1919, 9% between the wars and 23% since 1945; 71% are flats and 29% are houses. Where most homes are flats, opening up a flat in Belgravia changes the protected route from the bedrooms to the front door, so building control checks the escape before any wall comes out.

An open-plan Belgravia layout goes to Westminster as full plans

An open-plan scheme exists to change the room layout, and Westminster only accepts a building notice in place of full plans where the layout of the building stays as it was. For a Belgravia knock-through that settles the route before anything else: a full plans application, with the engineer's calculations and the revised floor plan submitted together. The layout drawing matters as much as the steel, because it shows how people get out of the upper floors once a hall or lobby wall has gone. In a townhouse over several storeys, that escape route is part of what the plan check looks at.

In Belgravia 28% of homes are terraced houses and 71% are flats, and the drawing has a different job in each. In a house it shows which doors onto the stair are kept as fire doors and where the smoke alarms are linked. In a flat it shows how the open space relates to the front door and the shared stair beyond it. We have the layout drawn before the kitchen or joinery is chosen, because a door kept for escape, or a glazed screen in place of a wall, changes where the units and the dining table can go.

Consents for open-plan work in SW1

Forming an open-plan space by removing internal structure is Building Regulations work, so Westminster City Council's building control, or a registered building control approver, reviews the engineer's calculations and inspects the beam and its bearings before signing off. Internal reconfiguration does not need planning permission. If the house is listed, though, listed building consent is needed for internal alterations that affect its character, including removing a wall, and exterior changes in the conservation areas can need planning permission. We help you establish which applies before design work starts.

As these terraces and mews share party walls with neighbours, a beam that bears into the shared wall makes the work notifiable under the Party Wall Act, and you serve notice as building owner before starting, using the drawings we supply. From the first engineer's visit to the final coat of plaster, GS Renovation coordinates the engineer's design and runs the propping and the building control inspections as one job.

• Steel beam installation to remove the dividing wall
• Ventilation and extraction planned for an open kitchen
• Structural engineer coordination and building control sign-off

VOA Council Tax stock of properties, March 2025, for the Knightsbridge, Belgravia & Hyde Park statistical area, which also covers parts of Knightsbridge. Counts rounded by the VOA.

Two or three things usually come up alongside open-plan conversion on a Belgravia job: home renovation in Belgravia, open-plan conversion across Westminster, side return infills, converting a garage into living space, open-plan conversion across London and Kitchen Island Guide.

Trusted Open-Plan Conversions in Belgravia

Belgravia homeowners choose GS Renovation because opening up a Georgian or listed townhouse takes structural know-how and a light touch with period detail. One accountable team installs steel sized by the engineer we appoint, Westminster building control sign-off, careful staged work in an occupied home and clean reinstatement, all backed by our founder's 30+ years on the tools.

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Structural design is by the consulting engineer appointed to your project.