Structural alterations, new openings and steel support in Holland Park. Trusted, professional, 30+ years' hands-on experience.
From new openings to underpinning, GS Renovation carries out structural alterations across Holland Park's W11 villas and period terraces. With over 30 years of building experience in the Royal Borough of Kensington and Chelsea, we form supported openings, replace tired joists and strengthen foundations, always to a structural engineer's design and signed off under the Building Regulations.

Holland Park's bay-fronted Victorian and Edwardian terraces present a familiar set of structural jobs: widening a doorway between rooms, forming a new supported opening into the side return, or replacing floor joists softened by decades of damp beneath the closet wing. Each one changes how load travels through the building, so we start with an engineer's assessment rather than guesswork about what the existing structure is quietly holding up.
Where a fresh opening is cut into a supporting wall, a correctly sized steel beam carries the masonry above and bears onto padstones at each end. Replacement joists are specified to span the room and match the existing floor levels. Every alteration is temporarily propped, taken apart in controlled stages and reassembled so the load path is continuous and sound before we ever release the supports.
Some W11 properties, particularly older villas near Holland Park itself, show settlement or need deeper foundations before a basement or extension. We underpin in short, engineer-designed sequential bays so the building stays supported throughout, pouring each section before moving to the next. It is patient, methodical work, and in a densely built street it demands care for the neighbouring foundations as well as your own.
Structural alterations are controlled under the Building Regulations, so the Royal Borough of Kensington and Chelsea's building control inspects and certifies the work, not a planning department. Where the alteration touches a shared party wall or affects an adjoining foundation, the Party Wall Act applies and you serve notice first. Planning consent is only relevant for external changes on listed buildings or within a conservation area.
Structural alterations reward a single team that owns the whole process, and that is what GS Renovation offers Holland Park. We commission the engineer, form supported openings and underpinning correctly, handle building control, and work tidily in your occupied home. Thirty-plus years across the Royal Borough back the certificate you receive at completion.
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George was brilliant. Lovely bloke, very reasonably priced and a perfectionist to boot. He completed our small kitchen renovation with care and great…
FAQ
Everything needed to finish the work and get it signed off. The structural alterations quotation for a Holland Park home covers labour, materials, the structural engineer where the design requires one, the Royal Borough of Kensington and Chelsea building control element, and the making good afterwards. Anything genuinely uncertain at the W11 property is flagged before we start rather than added later. GS Renovation issues it after a free W11 survey, with no obligation in Holland Park or the wider Kensington and Chelsea. As a rough guide, structural alterations in London ranges from roughly £1,500 for a simple opening to £15,000 or more where underpinning or major works are involved (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.
Allow for the structural stage, the following trades and the making good as three separate blocks. On a structural alterations project at a W11 address the first is usually shorter than Holland Park homeowners expect and the last longer, particularly in bay-fronted Victorian terraced housing. GS Renovation gives you the week by week programme with the quotation. The Royal Borough of Kensington and Chelsea inspections are marked on it in advance. Email info@gsrenovationltd.co.uk and we will send a sample Kensington and Chelsea programme before the W11 survey.
One named project manager, from the first survey to the final certificate. They run the structural alterations programme at your W11 property, coordinate the trades, book the Royal Borough of Kensington and Chelsea inspections and answer the phone when you ring. You are not passed between subcontractors on a Holland Park job. GS Renovation keeps that single point of contact on every Kensington and Chelsea project. Ring 07472 424 226 and ask who it would be. The same manager answers the phone throughout a Kensington and Chelsea job.
The engineer's calculations usually take a week or two, and a building notice to Royal Borough of Kensington and Chelsea can be submitted quickly. Full plans approval takes longer but gives more certainty before work starts. We advise which route suits your W11 project when we quote.
It changes the making good more than the structural element. Bay-fronted Victorian and Edwardian terraces with rear closet wings and side returns rarely have square openings or regular floors, so structural alterations at a W11 property takes longer in plaster and joinery than in a modern house. GS Renovation shows that as a separate line on the Holland Park quotation. The survey that establishes it is free. GS Renovation will explain on 07472 424 226 how structural alterations are actually priced at a W11 address in Holland Park itself.
Internal structural work, such as new openings, replacement joists or underpinning, is controlled under the Building Regulations, so the Royal Borough's building control signs it off, not planning. Planning permission only applies to exterior changes in a conservation area or on a listed building. We confirm which consents your W11 property needs and arrange them.
We are not confined to one area. Structural alterations work spans Holland Park and the wider Kensington and Chelsea, with projects running in Kensington and across Central London as well. That breadth is what lets GS Renovation attend a W11 site quickly for a survey or for aftercare. Call 07472 424 226 for current availability. Nothing is owed for the visit or the written quotation. Neither the borough boundary nor the postcode changes anything about what we charge.
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 Holland Park. Explore what else we do locally:
Same Service, Nearby Areas
We carry out structural alterations across Holland Park and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for structural alterations in Holland Park. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.