Steel beam installation, rsj and structural alterations in Sidcup. Trusted, professional, 30+ years' hands-on experience.
GS Renovation installs steel beams and RSJs across Sidcup, where the DA15 streets are lined with 1930s semi-detached and interwar houses on generous plots. With over 30 years of structural experience in South East London, we remove load-bearing walls and open up these solid interwar layouts safely, from survey through to building control sign-off.

The typical Sidcup job opens up a 1930s semi, taking out the wall between the front reception and the rear dining room, or knocking through to the kitchen to make one bright living space. In an interwar house that dividing wall usually carries the floor and ceiling above, so we never touch it until a structural engineer has sized the beam and specified the bearings for the loads involved.
We begin with temporary propping to support the structure, then carry out a safe, staged demolition rather than pulling walls down in one go. The RSJ is lifted into position, seated onto padstones at each end and packed tight so the load transfers cleanly. Everything is inspected by Bexley Council building control before we plaster over.
Because Sidcup is dominated by semi-detached houses, the dividing wall between you and your neighbour is a shared party wall, and the chimney stacks often sit within it. Where a new beam bears into that wall, or where we cut pockets for padstones, the Party Wall etc. Act 1996 applies. We flag this early so you can serve the correct notice on your neighbour in good time.
Serving notice properly protects you and keeps the project on schedule, avoiding disputes once work starts. We coordinate the structural engineer's calculations, the padstone details and the building control application together, so the steelwork, the bearings and the party wall matters are all handled as one job rather than left for you to chase separately.
Sidcup homeowners choose GS Renovation because we treat steelwork as the structural job it is, not a quick knock-through. One accountable team manages the engineer's calculations, the propping, the padstones, the party wall notices and building control sign-off, backed by 30+ years across DA15 and the wider Bexley borough. You get a genuinely open, structurally sound home.
George was brilliant. Lovely bloke, very reasonably priced and a perfectionist to boot. He completed our small kitchen renovation with care and great attention to detail. I've already recommended him to others.
Splendid job on our new kitchen refurb, including new flooring, moving the services, installing RSJ and preparing space for new back doors… George was always friendly, communicative and has an excellent attention to detail, ensuring everything is finished to a high standard.
Giorgio is an excellent and intelligent workman, and with very reasonable prices!… He paid a lot of attention to detail that is not common at all, and the final result was immaculate. Highly recommended!
FAQ
Pricing RSJ and steel beam installation in Sidcup comes down to the size of the job, the specification you choose and the condition of the property. Rather than guess, we survey and give you a fixed, itemised quote you can rely on. Call 07472 424 226. As a rough guide, RSJ and steel beam installation in London runs roughly £1,500 to £4,000 for the beam itself on a single straightforward opening, covering supply, installation and building control sign-off; a full knock-through including taking the wall out, the structural engineer's fee and making good more typically comes to £2,500 to £6,500 or more (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 straightforward Sidcup project can be done in a couple of weeks, while a larger RSJ and steel beam installation with structural work runs longer. We set out a realistic, stage-by-stage programme before we begin so there are no surprises.
With more than three decades of hands-on trade experience behind us, GS Renovation is a trusted choice for RSJ and steel beam installation in Sidcup. You get one accountable team, transparent pricing, fully insured tradespeople and genuine aftercare on every project.
Removing a load-bearing wall in Sidcup does not normally need planning permission, but it always needs building regulations approval, a structural engineer's calculations and building control sign-off. Where the wall is shared with a neighbour, the Party Wall Act may also apply. We manage all of it.
Yes. A large share of Sidcup's homes are 1930s and interwar properties, and we renovate them regularly. We plan each RSJ and steel beam installation around their particular characteristics, such as cavity walls, regular original layouts and the generous plots that suit extending, so the result suits the building and meets building control.
Very likely, yes. Sidcup semis share a party wall with the neighbouring house, and if a new steel beam bears into that shared wall the Party Wall etc. Act 1996 applies. We identify this at survey stage and help you serve the correct notice in good time. The beam itself still needs building control sign-off under building regulations, which we manage alongside the party wall process.
Yes, Sidcup is one of our core areas. We work on every street and the DA15 area and across the wider South East London, so wherever your home is, call 07472 424 226 and we will confirm we can help.
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 Sidcup. Explore what else we do locally:
Safe load-bearing wall removal with steel beam support.
Structural alterations, new openings and steel support.
Chimney breast removal with gallows bracket or beam support.
Open-plan kitchen, diner and living conversions.
Single and double storey extensions.
Full refurbishments and whole-house renovations.
Bespoke kitchen design and installation.
Luxury bathroom and wet-room refurbishment.
Same Service, Nearby Areas
We carry out RSJ and steel beam installation across Sidcup and the surrounding areas. Explore a nearby location:
Contact GS Renovation today for a free, no-obligation quote for RSJ and steel beam installation in Sidcup.
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