RSJ and Steel Beam Installation Romford
Steel beam and RSJ installation in Romford, 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 steel beams and RSJs across Romford, where interwar semis sit alongside terraces, post-war homes and flats across RM1. We open up these homes safely, installing every beam at the size the engineer we appoint calculates for its loads.
In Romford, 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 Romford.
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 Romford address and an itemised quote.
- The engineer we appoint sizes the beam, and the work is registered with Havering 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.
Removing load-bearing walls in Romford semis
The interwar semis around Romford were built with a central spine wall carrying the first floor and roof, so knocking through the ground floor almost always means taking out something structural. We start with a structural engineer, who calculates the beam size and specifies the padstones the steel bears onto, then we check what we find on site against that design before any brick is touched. Nothing is guessed on site, which matters in these substantial 1930s houses.
On the day, we set temporary props to take the weight, carry out staged demolition so the wall comes down in a controlled sequence, and lift the RSJ into position onto its bearings. Havering Council building control inspects the work, checks the padstones and the beam, and signs it off. In the RM1 semis this typically turns two cramped rooms into one open living space.
Housing in Romford
Around 20,230 homes make up Romford on the valuation list; 35% are flats and 65% houses, and 15% date from before 1919, 42% from between the wars and 43% from after 1945. 28% of homes here are terraced; a beam in a terrace in Romford often bears on the party wall, bringing in the Party Wall Act.
Where the steel bears in Romford's older and interwar walls
15% of homes in Romford were built before 1919, and in those houses the beam is rarely the weak point. The wall it sits on is. Solid brick laid in soft lime mortar can crush under a concentrated load that the same wall carried without trouble when it was spread along its length. So the structural engineer we appoint looks hard at the piers either side of the opening in an older Romford house. The design may call for a larger padstone, a longer bearing, or a short length of pier rebuilt in harder brick before the steel goes in. Price the job with that possibility in it, not as a surprise on the day the wall comes out.
42% of Romford homes were built between 1919 and 1939, and the walls of that period can be solid or cavity depending on the builder and the date. It matters for the bearing. Where a beam replacing an internal wall bears into an outside cavity wall, the padstone normally sits on the inner leaf alone, so the condition and thickness of that leaf decide the bearing. Where the opening is in the outside wall itself, both leaves need carrying, which changes the steel. A small exploratory hole at each end, made before the engineer finishes the calculation, settles which wall your Romford house has. It is a small job, and it saves redesigning the steel once the props are up.
Party wall steels along Romford boundaries
In Romford's semis and terraces, the wall you share with next door is a party wall, and any beam that bears into it, or work that cuts into it, brings the Party Wall Act into play. We flag this early, help you serve the correct notice on your neighbour, and give you the drawings the notice needs before the steel goes anywhere near the shared structure. Getting this right avoids disputes and keeps the project moving.
Chimney breasts are the other common steel job in these interwar homes. Removing a breast on the ground or first floor leaves the stack above needing support, so we install a steel beam to carry it, or gallows brackets only where the engineer and building control accept them, again designed by the engineer and signed off by building control. On the generous plots typical of RM1, we can also prop and beam to suit a later rear extension in the same phase.
- Structural engineer's calculations arranged and followed
- Making good, plastering and finishing around the new steel
- Existing pipework and cabling diverted around the new opening
VOA Council Tax stock of properties, March 2025, for all 5 statistical areas in Romford. Counts rounded by the VOA.
Trusted RSJ and Steel Beam Installation in Romford
Romford homeowners choose GS Renovation because we treat steelwork as a structural discipline, not a quick knock-through. The engineer sizes the beam, we prop and demolish in a safe sequence, and Havering building control signs it off. With our founder's 30+ years on the tools, we coordinate the work around the party wall award and the finish under one accountable team.
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…
Excellent service. George's knowledge and skills are the best in the market. He knows what he is doing, does really high quality work, gives good…
My husband and I are extremely pleased with the work. The standard of the work is outstanding and Saiid has a great eye for detail and will not leave…
FAQ
Frequently Asked Questions about RSJ and Steel Beam Installation Romford
Does the cost of RSJ and steel beam installation rise in an interwar Romford property?
Age affects the cost of RSJ and steel beam installation in Romford less than people fear; the structural part is broadly similar, within £1,500 to £4,000 for one beam opening (indicative). What differs in interwar housing is making good plaster, skirtings and floor finishes around the RM1 works, priced as separate lines. The sequence also holds: the opening is propped before any masonry comes out.
Do I need a party wall notice to fit an RSJ in my Romford semi?
Very likely, yes. Many homes around Romford are semi-detached or terraced, so the beam often bears into or affects the wall shared with your neighbour, which triggers the Party Wall Act. We arrange for a structural engineer to size the beam, help you serve the correct notice as building owner, and only start once the paperwork is in order and building control is booked.
When does building control inspect an RSJ in a Romford home?
At the points where the work would otherwise be hidden. Havering building control normally wants to see the padstones and the beam seated and packed before the ends are built in, and then the fire protection once the steel is boxed. After a final visit the completion certificate is issued. Booking inspections as each stage finishes avoids opening up finished plaster later.
What does the engineer need to size an RSJ for a Romford semi?
The span and everything that lands on it. That means which way the first-floor joists run, whether a wall or chimney breast sits above, and whether roof struts in a hipped roof bear down onto the line of the wall. A look in the loft and under a floorboard usually answers this. The calculations then fix the section, padstones and any connections.
What is a goalpost frame and would my Romford knock-through need one?
It is a beam carried on two steel posts instead of on the walls at each end. It is used where a wall cannot take the bearing, for example when the opening runs to a corner or the brick below is weak. Each post needs its own concrete pad foundation, designed by the engineer and inspected by building control before the floor is reinstated.
Is the steel delivered before the wall comes down in a Romford house?
Yes. The beam is cut to the engineer's calculations and on site before any demolition starts, so the opening is never left relying on props longer than needed. On the day, props go in, the wall is taken down in stages, and the RSJ is lifted onto its padstones and packed. The props come out only once the bearings are fully loaded.
How long does Havering's fast track take to check a Romford beam design?
Havering's fast track building control service has the application checked within 10 working days. For a Romford beam job that is the window between the engineer finishing the calculations and the steel being ordered. Use it to confirm the section and padstone sizes on paper, then book the steel and the props. If the check asks for a heavier section, a beam already cut to the first design is wasted, and a second delivery costs more than the wait.
Does it cost more to put a Romford beam through full plans than a building notice?
No. Havering's building regulation charges are the same for corresponding work whether it goes in as a full plans, building notice, regularisation or reversion application. So for a Romford knock-through the route is a choice about timing and risk, not the fee. Full plans has the design checked before work starts. A building notice gets the job moving sooner, but there is no plan check before work starts, so any query about the steel tends to come up once the job is under way.
What does a prior approval extension on a Romford semi mean for the steel?
Havering's prior approval route is for larger single storey rear extensions of up to 6m for an attached property or up to 8m for a detached property. On a Romford semi, a deep extension often comes with a wide opening from the old kitchen and dining room into the new space. That opening is carried on steel, often with posts or piers at each end on their own pads. Settle the extension depth and width before the engineer sizes the beam.
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