Steel beam installation, RSJ and structural alterations in Barnes. Trusted, professional, 30+ years' hands-on experience.
GS Renovation installs RSJs and steel beams across Barnes, where bay-fronted Victorian and Edwardian terraces in SW13 hide load-bearing walls between reception rooms and rear closet wings. With more than 30 years of structural work in South West London, we open up these period homes safely, from engineer's design through to building control sign-off.

Most Barnes knock-throughs involve the spine wall of a Victorian terrace, the masonry that carries the floor joists and often part of a chimney stack. Our structural engineer sizes the RSJ to the loads above, specifies concrete or steel padstones at each bearing, and we prop the structure temporarily before any demolition begins. Only then do we cut out the wall in stages, so nothing above is ever left unsupported.
Because the dividing wall and chimney breast in an SW13 terrace usually sit on a shared party wall, most beam projects here need notice served under the Party Wall Act to your neighbour before work starts. We flag this early, help you appoint a surveyor if needed, and coordinate the schedule so the steel goes in on time. Every beam is inspected and signed off by building control under the Building Regulations.
Where Barnes homeowners infill the side return to widen a kitchen, the outer wall of the closet wing has to be picked up on steel so the space can flow uninterrupted. We build goalpost frames to the engineer's design, with a horizontal beam bolted to vertical posts on padstones, to hold the existing structure while the old wall comes out. This keeps head height and lets natural light reach deep into the plan.
Steel sizing is never guesswork. A structural engineer calculates each beam for the specific loads in your Barnes property, whether that is a single reception opening or a full rear structural opening carrying the storeys above. We handle the temporary works, the padstone bearings and the fire protection to the finished steel, then arrange building control inspection at the key stages. You are left with a solid, compliant opening ready for plastering and finishing.
Barnes homeowners choose GS Renovation because we treat steel beam work as structural engineering, not demolition. One team manages the engineer's design common in SW13 terraces, the temporary propping and the building control sign-off, with 30+ years behind every job. You get a clean, safe opening and honest advice about what your period home can carry.
What can I say!!! George is an extremely lovely man his workmanship is second to none, he has an excellent eye for detail and nothing was to much…
I am very happy to recommend George after he completed the work on my 2 bathrooms. He worked very hard to make sure everything was completed and even…
Giorgio is an excellent and intelligent workman, and with very reasonable prices! He installed a kitchen extractor fan in a complicated situation…
FAQ
You get a variation, in writing, before anything else happens. The commonest cause on an RSJ and steel beam installation job is a homeowner upgrading a finish once the SW13 space is open, which is entirely reasonable and easy to price. GS Renovation also re-checks the programme so a Barnes project does not quietly slip. The Richmond Council inspections are rebooked where needed. Ring 07472 424 226 to hear how that runs on an SW13 project in Richmond upon Thames. 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.
It depends on the scope, and we will map it at survey. Once we have seen the SW13 property, RSJ and steel beam installation can be programmed properly for your Barnes home, including the making good that solid-wall Victorian terraces with original chimney breasts and suspended timber floors demand. GS Renovation issues that with the quotation. Nothing about a Richmond upon Thames timeline is left to be worked out on site. Email info@gsrenovationltd.co.uk with the SW13 address and we will programme the Barnes work properly from the outset.
Communication is the difference most clients mention. You get a weekly update on the RSJ and steel beam installation project at SW13, and if something changes on the Barnes job you hear it from GS Renovation first rather than at handover. The quotation is itemised and the programme is written. Neither is normal in this trade, and both are why Richmond upon Thames work keeps coming from referrals. Ring 07472 424 226 to discuss it. Ask on 07472 424 226 who would manage your Richmond upon Thames job.
If the beam bears into a wall shared with a neighbouring property, yes, and that covers most terraces and semis in Barnes. Notice must be served before work begins, and the duty sits with you as building owner. We prepare the notices for your SW13 address.
In most cases yes, provided the structure is confirmed first. RSJ and steel beam installation at an SW13 property of that age is entirely achievable once an engineer has established the load path, and GS Renovation coordinates that before any design is finalised. Richmond Council then inspects the structural stages. Where it is not suitable we will tell a Barnes homeowner plainly. Email info@gsrenovationltd.co.uk and we will explain what RSJ and steel beam installation requires at an SW13 property first.
Usually yes. The spine wall and chimney breast in a Barnes Victorian terrace often sit within the party wall shared with next door, so cutting in a beam means serving notice under the Party Wall Act. Removing the wall itself needs building control approval under the Building Regulations, not planning permission. We arrange the engineer's design and guide you through both, so the job is fully compliant.
Almost always, and it is a fair question to ask any contractor. RSJ and steel beam installation across Barnes is core work for GS Renovation rather than an occasional job, so there is usually an SW13 project or a Richmond upon Thames one under way. Ask to speak to those clients. Call 07472 424 226 and we will arrange it. Seeing finished work in Twickenham is worth the trip. Nothing about an SW13 address is withheld if you ask.
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 Barnes. Explore what else we do locally:
Same Service, Nearby Areas
We carry out RSJ and steel beam installation across Barnes and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for RSJ and steel beam installation in Barnes. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.