Steel beam installation, rsj and structural alterations in Lewisham. Trusted, professional, 30+ years' hands-on experience.
GS Renovation installs RSJs and steel beams across Lewisham, from the bay-fronted Victorian terraces of Forest Hill in SE23 to the Edwardian family homes near Blackheath in SE13. With 30+ years of structural experience, we remove load-bearing walls safely, opening up the tight, cellular layouts typical of these period terraces while keeping the house sound.

The classic Lewisham job takes out the wall between the front and rear reception rooms, or the wall into the rear closet wing, to make a single open living space. Because these Victorian and Edwardian terraces carry floor and roof loads through those internal walls, a structural engineer sizes the steel beam first. We then set the RSJ onto concrete padstones at each end so the load spreads safely into the remaining brickwork.
Safe sequencing matters on an occupied street in SE4 or SE6. We install temporary props, Acrows and strongboys, to hold the structure above, then carry out staged demolition rather than pulling the wall down in one go. Once the beam is in and bearing correctly, we remove the props, fireproof and box in the steel, and make good. Lewisham Council building control inspects the work and signs it off, giving you the completion certificate you need.
Terraces in Deptford, New Cross and Catford share a party wall with the house next door, and the chimney breasts and stacks are often built into that shared wall. When your steel beam bears near or into it, the Party Wall etc. Act 1996 usually applies. That means serving formal notice on your neighbour before work starts, typically two months ahead, so the process is agreed and everyone is protected.
We are used to coordinating this across Lewisham's tightly packed streets. Where a chimney breast is removed on a lower floor, the stack above must be properly supported with a gallows bracket or beam, again to the engineer's design. We can recommend a party wall surveyor, prepare the technical drawings your neighbour's side will want to see, and time the notice period so it does not hold up the rest of your build.
Lewisham homeowners choose GS Renovation because we handle the whole structural job under one roof, from the engineer's calculations and the party wall notices to the propping, the beam and building control sign-off. With 30+ years opening up SE13, SE23 and SE26 terraces, we work cleanly in occupied homes and stand behind every beam we install.
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 Lewisham 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.
We will give you an honest timescale for RSJ and steel beam installation in Lewisham after surveying your home. Most projects run on a clear weekly programme, and we tell you up front about any lead times on materials or approvals.
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 Lewisham. You get one accountable team, transparent pricing, fully insured tradespeople and genuine aftercare on every project.
Removing a load-bearing wall in Lewisham 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 Lewisham's homes are Victorian and Edwardian terraced properties, and we renovate them regularly. We plan each RSJ and steel beam installation around their particular characteristics, such as solid brick walls, rear closet wings, side returns and original period features, so the result suits the building and meets building control.
Often yes. Most Lewisham terraces in SE4, SE6 and SE14 share a party wall with the neighbouring house, and if your steel beam bears into or near that wall, the Party Wall etc. Act 1996 applies. You serve notice, usually two months before work begins. We guide you through it and can recommend a surveyor, so nothing is missed.
Absolutely. Our team works right across Lewisham and the SE4 area and neighbouring parts of South East London. Get in touch on 07472 424 226 to check coverage for your address.
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 Lewisham. 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 Lewisham 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 Lewisham.
Get Your Free Quote