Steel beam installation, RSJ and structural alterations in Purley. Trusted, professional, 30+ years' hands-on experience.
GS Renovation installs RSJs and structural steel beams across Purley, where the CR8 streets are lined with 1930s semi-detached and interwar suburban houses on generous plots. With over 30 years of experience, we remove load-bearing walls safely, opening up the compartmented layouts these homes were built with, and see the job through building control from start to finish.

The typical Purley interwar semi was built with small, separate rooms and solid internal walls carrying the floor and roof above. Opening the ground floor into a single living space means a structural engineer sizes an RSJ for the exact span and load, and we set it onto padstones at each bearing. We prop the structure temporarily, take down the wall in careful stages, and lift the steel into position before removing any props.
Because these houses often had the kitchen and rear reception built as separate compartments, more than one beam or a goalpost frame is sometimes needed. We calculate the bearings, confirm the padstone specification with the engineer, and keep the works fully supported at every stage so nothing above is left carrying weight it was never designed to hold.
In a semi-detached Purley house the dividing wall between you and your neighbour is a shared party wall, and the chimney stacks frequently sit within it. When a beam bears into that wall, or when work affects the shared structure, the Party Wall Act applies and notice must be served on the adjoining owner before we begin. We flag this early so the notice period is running while the design and engineering are finalised.
We coordinate the timing so that steel is only cut into the party wall once the correct consents are in place. Every beam we install in CR8 is signed off by building control, with the engineer's calculations, padstone details and any party wall paperwork kept together so your completion certificate is straightforward when you come to sell or remortgage.
A great many Purley houses have an integral or attached garage that is now used for storage, and turning it into a room is one of the better uses of a steel beam. The wall between the garage and the house is often load-bearing, and the garage door opening itself has a lintel sized for a door rather than for a habitable room, so both usually need attention from the engineer.
The rest of the work is about turning a cold shell into a warm one. The floor typically sits lower than the house and slopes to the door, so it is built up, insulated and levelled. The walls need insulating, the front opening is closed with an insulated wall and window on a proper foundation, and the whole thing has to meet the regulations for a habitable room including ventilation and escape. Building control treats it as a material change of use.
Purley homeowners choose GS Renovation because we treat steelwork as a controlled structural process, not a quick knock-through. Over 30 years across CR8 and neighbouring Croydon, we have propped, opened and beamed countless interwar semis, working to the engineer's figures and to building control. One team handles the design coordination, the safe demolition and the sign-off.
I had a bathroom refit which I was very pleased with and I then went on to get my kitchen refitted as I was so happy with the way he worked. Even…
George always kept to commitments and arrived on time. He offered helpful suggestions during his initial visit and promptly provided a reasonably…
It's the second time I have hired George and he has been absolutely professional and the work he did resembles perfectly what I had in mind. Being an…
FAQ
Variation almost always comes from what has been left out. GS Renovation prices RSJ and steel beam installation after a survey at the CR8 property, covering structure, trades, approvals and reinstatement, so the total looks higher than a quote covering half of it. A Purley homeowner comparing like with like usually finds the gap narrows. That is worth doing before anyone starts work in Croydon. Ring 07472 424 226 and GS Renovation will go through the CR8 quotation with you line by line. 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.
In most cases you can, and we plan the Purley works around it. The question is whether RSJ and steel beam installation takes out the kitchen, the bathroom or the heating at your CR8 property for any length of time, and the programme shows exactly when. GS Renovation phases the Croydon job room by room where staying put matters. Sometimes moving out for one week is simply easier. Ring 07472 424 226 and GS Renovation will describe how a CR8 household in Purley usually manages.
You get the Croydon Council completion certificate, the guarantee and a number that still answers. Installations carry a five year guarantee, and if something needs attention at your CR8 property after RSJ and steel beam installation is signed off you reach the same people who did the Purley work. GS Renovation does not route aftercare through a call centre. Nothing about that is a brochure line. Ring 07472 424 226 whenever a Croydon issue arises. The guarantee covers Croydon installations for five years.
No, internal steelwork does not engage planning in a Purley home, but it always needs building regulations approval, a structural engineer's calculations and Croydon Council sign-off. Where the wall is shared with a neighbour the Party Wall Act applies. GS Renovation manages all of it for your CR8 property.
Usually earlier alterations that were never done properly. RSJ and steel beam installation at a CR8 property of that age regularly uncovers removed structure, notched joists or wiring that predates any certificate, and each is costed and agreed before we continue. GS Renovation names the likely candidates at the Purley survey. Croydon Council is notified where a change affects approved work. Ask on 07472 424 226 what RSJ and steel beam installation commonly uncovers at a CR8 address of that sort of age.
Removing an internal load-bearing wall is a building regulations matter, not planning permission, so it needs a structural engineer's calculations and building control sign-off rather than an application to Croydon Council. If the wall is shared with your neighbour, the Party Wall Act also applies and you serve notice first. We handle all three strands for you.
We do, and the boundary is not a hard line. What decides it for an RSJ and steel beam installation project is whether GS Renovation can survey the CR8 property, run the Purley programme and come back for aftercare without the travel undermining any of it. Most of Croydon and South London qualifies comfortably. Call 07472 424 226 and we will be straight with you. Quotes remain free either way. Aftercare visits to CR8 are part of the same commitment.
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 Purley. Explore what else we do locally:
Same Service, Nearby Areas
We carry out RSJ and steel beam installation across Purley and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for RSJ and steel beam installation in Purley. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.