Open-plan kitchen, diner and living conversions in Westminster. Trusted, professional, 30+ years' hands-on experience.
GS Renovation creates open-plan and broken-plan spaces in Westminster's period homes, from kitchen-diners in Marylebone townhouses to knock-throughs in Pimlico and Belgravia. With over 30 years in W1, SW1 and W2, we combine grand period rooms into flowing, light-filled spaces while respecting the structure that holds these Georgian and Regency buildings up.

The classic Westminster knock-through joins two reception rooms, or a kitchen and dining room, into one generous space that suits how these homes are lived in today. In the terraces of Belgravia and Marylebone the dividing wall between those rooms is usually load-bearing, so we do not simply open it up. A structural engineer sizes a steel beam to span the opening, bearing onto padstones, and we prop the floors above while the wall is removed in stages.
Not every Westminster homeowner wants a single vast room, and broken-plan layouts suit these tall, formal interiors well. We keep a sense of separation with a wide supported opening, a part-height return, or slim Crittall-style glazed dividers that let light travel through while defining a snug or study. In leasehold mansion-block flats around Paddington and W9, many internal walls are non-structural partitions, which gives more freedom to reconfigure, though the freeholder's consent still applies.
Opening up a Westminster home is internal work, so it is controlled under the Building Regulations rather than planning permission. Westminster City Council's building control inspects the beam, the padstones and the fire and ventilation arrangements before signing off. If your townhouse is listed, as many are in Mayfair and Belgravia, removing original walls or cornices may need listed-building consent, so we establish the property's status before any design is finalised.
Where the wall being opened is a party wall shared with a neighbouring house, the Party Wall Act applies and you serve notice before work begins, standard practice in the linked terraces of SW1 and W1. In a mansion-block flat we secure the freeholder's licence to alter, coordinate with the managing agent, and meet the building-management rules on sound insulation between flats. Whichever your home, we line up every consent up front.
Westminster homeowners choose GS Renovation for open-plan work because we deliver the whole project through one accountable team. We build the structure to an engineer's design and install the steel, and finish with the plastering, flooring and Crittall glazing. Party wall notices or the freeholder's licence, and building control sign-off, are all handled, with tidy working in your period home and 30+ years behind every job.
Excellent service. George's knowledge and skills are the best in the market. He knows what he is doing, does really high quality work, gives good…
Very friendly and I am very pleased with the work he has done, also very clean worker and enthusiastic about his work. Can not fault this company!!!!…
Built a new extension at rear of property. Laid foundations, drainage, raised floor, new roof and completed all fixtures and interior decoration…
FAQ
It covers the whole job through to sign-off. The document lists the structural work, the trades that follow, the Westminster City Council inspections and the making good at the W1 property, with the engineer's fee shown where open-plan conversion needs a design. Site protection and the daily clear-up are included. GS Renovation issues it in writing so a Westminster homeowner has something to hold us to. Ring 07472 424 226 for a sample Westminster layout before the W1 survey. 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.
That is how we work, and it is deliberate. Splitting a crew across Westminster jobs makes every one of them late, so open-plan conversion at a W1 address is resourced properly from the first day to the certificate from Westminster City Council. GS Renovation would rather start you two weeks later than leave a house open. Ask our Westminster references about it. Ring 07472 424 226 and we will confirm what else is running in Westminster or Camden.
Not a call centre, and not a different voice each week. GS Renovation assigns one manager to your open-plan conversion project, who surveys the W1 property, writes the programme and stays accountable until the Westminster City Council certificate is issued. That is the single biggest reason Westminster clients say the process felt calm. Ring 07472 424 226 and you will speak to them about your Westminster job directly. That manager is your only point of contact in Westminster.
Where the dividing walls are non-structural partitions, usually yes, but the lease and the freeholder's licence to alter come first. In a W1 flat we confirm with an engineer what is carrying load before agreeing any layout.
Usually earlier alterations that were never done properly. Open-plan conversion at a W1 property of that age regularly uncovers removed structure, notched joists or wiring that predates any certificate, and each is costed and agreed before we continue. GS Renovation names the likely candidates at the Westminster survey. Westminster City Council is notified where a change affects approved work. Ask on 07472 424 226 what open-plan conversion commonly uncovers at a W1 address of that sort of age.
Usually yes, but the dividing wall in a Westminster townhouse is typically load-bearing, so it needs a steel beam designed by an engineer, not just a doorway widened. The work falls under the Building Regulations and building control, and where the wall is shared a party wall notice is served. If the house is listed, we check whether listed-building consent is required first.
No minimum. GS Renovation takes small open-plan conversion work at a W1 property as readily as a full project, and a modest job is how many of our larger Westminster contracts began. The survey is free either way. Ring 07472 424 226 and describe what you have in mind for your Westminster home. We will say honestly if another trade suits you better. The W1 survey is free whether the Westminster job is large or small.
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 Westminster. Explore what else we do locally:
Same Service, Nearby Areas
We carry out open-plan conversion across Westminster and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for open-plan conversion in Westminster. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.