RSJ and Steel Beam Installation Parsons Green
Steel beam and RSJ installation in Parsons Green, designed by the engineer we appoint and signed off by building control.
- Rated 4.9 from 31 reviews on MyBuilder
- London guide: £1,500 to £4,000
- Free site survey, itemised quote
GS Renovation installs RSJs and steel beams across Parsons Green, where the bay-fronted Victorian and Edwardian terraces around the green rely on load-bearing walls and shared chimney stacks. We open up these period homes safely and to building control standards.
In Parsons Green, a steel beam for one opening typically costs £1,500 to £4,000 fitted and signed off, or £2,500 to £6,500 or more for a full knock-through with the engineer's fee and making good (indicative London ranges, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Parsons Green.
Price guide
| Work | Indicative London range |
|---|---|
| Steel beam, one opening: supply, install, sign-off | £1,500 to £4,000 |
| Full knock-through with engineer and making good | £2,500 to £6,500+ |
Indicative London ranges (MyBuilder and Checkatrade, 2026), not a quotation. Prices checked September 2026. Full breakdown: RSJ & Load-Bearing Walls.
How the job runs
- Free site survey at your Parsons Green address and an itemised quote.
- The engineer we appoint sizes the beam, and the work is registered with Hammersmith and Fulham Council building control or an approved inspector. On a shared wall you serve the party wall notice as building owner; we supply the drawings.
- Props go in, the opening is cut and the beam is set on padstones, packed tight above.
- Building control inspects the steel before it is covered. We make good, and the completion certificate follows.
Opening up Parsons Green terraces safely
The typical Parsons Green project removes the wall between the front reception and middle room, or knocks the kitchen through to the rear closet wing, to create the bright open-plan space these SW6 terraces were never built for. Every beam is sized by a structural engineer to carry the floors, and in many cases the masonry above, then set onto padstones that spread the load into sound brickwork on each side.
Before any masonry comes down we install temporary propping and work through a staged demolition, taking the wall out in controlled sections rather than all at once. This keeps the Victorian structure above stable while the RSJ is lifted into position, packed and pinned, so the floors and any chimney breast overhead stay fully supported throughout.
Housing in Parsons Green
The Council Tax list puts Parsons Green at about 8,080 homes, 67% flats against 33% houses; 68% went up before 1919, 7% between the wars and 24% after 1945. Most homes here are flats, and a beam in a leasehold flat in Parsons Green needs the freeholder's licence for alterations, since the lease usually keeps the structure with the freeholder.
Booking the steel inspections on a Parsons Green beam job
In Parsons Green 68% of homes were built before 1919, so the brickwork a new beam sits on is old, lime-bedded and variable once the plaster comes off. That is why the padstone positions are opened up and looked at before the steel is ordered, not on delivery day. If a pier turns out to be rubble-filled or cut about by an old flue, the structural engineer we appoint can revise the bearing while the programme still has room. Changing the detail at that stage is a drawing revision; changing it with the beam on props is a stopped site.
Hammersmith and Fulham Council runs its own building control service, and site inspections need 1 day's notice in most instances. On a beam that short notice is useful: we call the visit as soon as the steel is seated and packed, so the props stay in and the opening stays exposed until the surveyor has seen it. Fire boarding and ceilings are held back until that stage is signed off. Completion inspections need 5 days' notice, so we book the final visit when decoration starts rather than when it ends, and the completion certificate is not left waiting on a diary.
Party walls and building control in SW6
Many dividing walls and chimney stacks in Parsons Green terraces sit within a shared party wall, so cutting bearings or removing masonry usually triggers the Party Wall Act. We flag this early, give you the drawings for the notices you serve on the neighbours either side, and plan around any schedule of condition the surveyors record, which matters on the tightly packed streets near the green.
Steel beam work is governed by building regulations rather than planning permission, so we submit the engineer's calculations to building control and arrange inspection of the padstones, bearings and connections. On completion you receive the sign-off and paperwork, giving you a clear record for future sale or remortgage of a home in Hammersmith and Fulham.
How the engineer counts the loads
The size of the beam follows from a load take-down, and it is worth knowing what goes into it. The engineer adds the permanent weight of everything the beam will carry, the floor structure and its finishes, the masonry above, any wall or chimney standing on it and the share of the roof that finds its way down. Then the variable loads are added, the weight of people and furniture on the floor above, and snow where a roof is involved.
Those are combined with factors set out in the design codes, and the resulting figure gives the bending and the deflection the section has to resist. It is why a beam over a five-metre opening in a Parsons Green terrace may be much heavier than one over the same span in a bungalow, and why substituting a smaller section because it looks adequate is never a judgement a builder should be making on site.
- Structural engineer's calculations arranged and followed
- Access and lifting plans for restricted terraced and town-centre sites
- Beam boxing, fire protection and plasterboard encasement
VOA Council Tax stock of properties, March 2025, for Parsons Green East & Eel Brook Common and Parsons Green West. Counts rounded by the VOA.
Why Parsons Green Homeowners Choose GS Renovation
Parsons Green homeowners choose GS Renovation because we handle the whole steel installation, from appointing the engineer for the calculations through to propping, beam and building control sign-off. One accountable team, tidy working in an occupied SW6 home and our founder's 30+ years of experience.
We loved working with George and Ibrahim and would highly recommend them. They have done splendid job on our new kitchen refurb which including new…
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
Frequently Asked Questions about RSJ and Steel Beam Installation Parsons Green
Can I get a fixed price for RSJ and steel beam installation at an SW6 address?
Most RSJ and steel beam installation jobs in Parsons Green can be fixed-price once the SW6 survey has established the scope. The quotation is fixed against that written scope, typically inside £1,500 to £4,000 for one beam opening (indicative), with the Hammersmith and Fulham Council building control fee included. The scope has to reflect the property, because what the beam carries and bears onto decides its size. Change the specification partway and the cost of the change shows immediately.
Do I need a party wall notice to put a steel beam in my Parsons Green terrace?
Usually yes. In most Parsons Green terraces the new beam bears at one or both ends onto a shared party wall, so cutting bearings or pockets into it triggers the Party Wall Act. You serve notice on the affected neighbour before work starts. We guide you through the notices and coordinate the timing with the structural work.
How does a long steel beam get into a Parsons Green terrace with no rear access?
Through the front door and along the hall, so the hall's length and the turn into the room set the limit. Where that is too tight, the engineer designs the beam in sections bolted on site, or the steel comes in through a front window once a sash is taken out. Everything passes through the house, so the hall floor and stair are boarded before delivery day.
When is a goalpost steel frame needed instead of a single RSJ in Parsons Green?
When the walls at either end cannot take the point load: the pier left beside the party wall may be too narrow, or a chimney breast may sit where a bearing should go. Steel posts then carry the beam down to new pad foundations. The engineer makes that call from the calculations, and building control inspects the pad excavations before the floor is reinstated.
Can the RSJ be left exposed in a Parsons Green kitchen?
Yes, provided it is fire protected, usually with an intumescent coating applied to the correct thickness. Decide before the beam is ordered, because the coating goes on clean steel and the bolted connections and padstones will be visible, so they need neat detailing. Building control checks the protection at completion. An exposed beam also avoids the depth added by boxing, which helps in lower rear rooms.
What is dry-packing, and why does it matter under a Parsons Green RSJ?
It is the stiff mortar or slate wedged into the gap between the top of the beam and the brickwork above, so the wall bears evenly on the steel rather than on a few high spots. In soft Victorian brick, uneven bearing can crack the wall above. The props stay in until the packing has gained strength, and building control usually sees it before the opening is boxed.
When is the building control inspection fee invoiced on a Parsons Green steel beam job?
On a Full Plans application the inspection fee is invoiced after the first inspection has been carried out, not with the application. The charges come from the fee schedule effective from 1st August 2023 under Scheme No.15 r4. For budgeting, that means a plan charge when the application goes in and a second invoice once work is under way. Keep that second payment in the budget from the start, so it does not land as a surprise mid-job.
Why do we look for old timber in the walls before a beam goes into a Parsons Green house?
Brickwork of the age that dominates Parsons Green, where 68% of homes predate 1919, often has timber built into it: bond timbers along a course, or a wooden lintel over an old opening. Timber in a wall rots and compresses over a century. A padstone must never sit on it. Where we find timber at a bearing, it is cut out and replaced with brick or concrete to the engineer's detail before the steel goes up.
Can the beam go in before the council decides the Full Plans application?
Starting before a decision is allowed, but it carries risk. Hammersmith and Fulham aims to decide a Full Plans application within 5 weeks, though it may take longer. If the surveyor then queries the calculations, steel already installed may have to be changed. The sensible order is to buy the beam once approval is in hand and use the waiting weeks for the party wall process, strip-out and protecting the house, so the programme loses nothing.
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