Structural alterations, new openings and steel support in Paddington. Trusted, professional, 30+ years' hands-on experience.
GS Renovation carries out structural alterations throughout Paddington, from forming new openings in Regency townhouses off Hyde Park to underpinning and joist replacement in W2's older converted homes. Drawing on more than 30 years in Westminster, we design each alteration around an engineer's calculations and see it through to building control certification.

Paddington's Georgian and Regency townhouses were built for a different way of living, so alterations here range from wider supported openings between reception rooms to replacement joists where original timbers have sagged or suffered rot. Every job begins with a structural engineer establishing the loads and specifying the steel or timber needed for these tall, slender W2 properties.
New openings are formed with steel beams bearing onto padstones, propped temporarily while we cut through in controlled stages. Where movement or a basement conversion demands it, we underpin foundations in sequenced bays to keep the structure stable. Supported openings, replacement joists and underpinning are all designed to spread load safely through the existing masonry.
Structural alterations inside a Paddington home fall under the Building Regulations, so Westminster City Council's building control inspects the propping, the steelwork and the foundations and issues the completion certificate. This is separate from planning: internal structural changes do not need planning permission, and only exterior work to a listed building or within a conservation area would require that additional consent.
Because so many W2 townhouses adjoin their neighbours through a shared party wall, cutting a new opening, underpinning near the boundary or bearing a beam into that wall is notifiable under the Party Wall Act. You serve the notices, coordinate the engineer, and manage building control so the whole alteration is documented and signed off correctly.
Homeowners across Paddington choose GS Renovation for structural alterations because we keep engineer, party wall, underpinning and building control under one roof. You deal with a single team that designs the opening or foundation works, serves the Westminster notices, props and builds in safe stages, and hands you certified paperwork, backed by 30+ years in W2.
Punctual, worked hard, and did exactly what he was asked and what he said he would do. Overall, a very high quality job. Will use again.
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!!!!…
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…
FAQ
Ask three builders in Westminster and you will get three different numbers for structural alterations, usually because they have scoped three different jobs. We price the W2 property after a survey and set out labour, materials, approvals and making good line by line. A Paddington homeowner can then see where any difference actually sits. GS Renovation puts all of it in writing. Ring 07472 424 226 and GS Renovation will arrange a free survey at your W2 property. 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.
A few weeks in normal conditions, more in the busy months. Getting the free W2 survey done early is what puts a Paddington homeowner into the schedule, and GS Renovation can submit the Westminster City Council application while you consider the quotation. There is no deposit to reserve a slot. Ring 07472 424 226 for the current position across Westminster. Nothing about a structural alterations slot at a W2 address is held against a deposit in Paddington.
No, not the core work. GS Renovation carries out structural alterations at your W2 property with its own team, and where a specialist trade is required we coordinate it directly rather than handing the Paddington job on. That is the difference between a contractor and a broker. One named project manager remains accountable across the whole Westminster project. Ring 07472 424 226 and ask exactly who would attend. One named manager stays with the W2 job across Westminster.
The structural engineer. GS Renovation is a contractor: we appoint and coordinate the engineer, arrange the temporary works, and build to their design at your Paddington address. We do not produce calculations ourselves, and any builder claiming to is worth questioning.
The load path first, then the condition of what remains. Structural alterations at a W2 address of that age needs the structure confirmed by an engineer, the timber checked for decay, and any earlier alteration assessed before design. GS Renovation coordinates all of it and submits to Westminster City Council. That is what stops a fixed Paddington price from moving. Ring 07472 424 226 and we will explain the structural alterations checks required at a W2 property.
Underpinning near a shared boundary is notifiable under the Party Wall Act, so your neighbour must be served notice before we begin. We work in small sequenced bays to keep both properties stable, follow the engineer's design, and Westminster building control inspects each stage. We coordinate the work around the party wall award and certification so the work is fully documented.
Give us the postcode and you will have an answer immediately. We cover Paddington and the surrounding Westminster for structural alterations, including addresses that sit right on the edge of W2. GS Renovation is on sites nearby most weeks. If we are not the right firm for your listed and conservation-area property we will say so. Email info@gsrenovationltd.co.uk and we will come back the same day. Nothing is owed for the reply or the W2 survey.
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 Paddington. Explore what else we do locally:
Same Service, Nearby Areas
We carry out structural alterations across Paddington and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for structural alterations in Paddington. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.