RSJ and Steel Beam Installation Havering
Steel beam and RSJ installation in Havering, 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 structural steel across Havering, from the 1930s semis of Hornchurch to the interwar streets around Romford. We open up load-bearing walls safely, with beams sized by a structural engineer and every stage signed off by building control.
In Havering, 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 Havering.
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 Havering 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.
Steel beams for Havering semis
The interwar semis around Hornchurch, Upminster and Romford typically have a solid dividing wall between the front and rear reception rooms, and often a load-bearing wall between the kitchen and the back of the house. Removing either to create a single open space means transferring that load onto a steel beam. The structural engineer we appoint calculates the size, and the beam bears onto concrete padstones at each end so the load passes safely down through the existing brickwork.
Before any brick comes out, we install temporary props to carry the floors and roof above, then remove the wall in staged, controlled sections. Once the RSJ is seated and the padstones have cured, we ease the load onto the steel and strike the props. Building control inspects the work at key stages, and where a wall is shared with the neighbouring semi, you serve the correct Party Wall Act notices before we begin.
Housing in Havering
Havering has about 108,680 homes on the Council Tax list: 5% pre-1919, 36% interwar and 59% post-war, with flats making up 26% and houses 74%. Semi-detached houses make up 29% of homes here, and a beam bearing on the shared wall of a semi in Havering means one party wall notice.
Choosing the approval route before the steel is ordered in Havering
Havering Council runs its own building control service, and its charges are the same for corresponding work whether it goes in as a full plans or a building notice application. For a beam, then, the choice between the two routes is not about the fee. It is about when somebody checks the steel. On a building notice there is no plan check before work starts, so any query about the section tends to surface on site, with the props up and the wall half out. On full plans the calculations are checked before the steel is ordered, and Havering's fast track service has the application checked within 10 working days. For a long opening across the back of a Havering semi, that short wait costs far less than a beam delivered one size too small.
Havering describes the building notice as most suitable for minor projects like small extensions or changes inside your home, and one short opening with sound brickwork either side fits that description. Keep the notice route for jobs like that. Some beams need more than that. Where the steel lands on a narrow pier between two openings, picks up a point load from a wall above, or forms part of a goalpost frame, use full plans. The structural engineer we appoint then answers the checker's questions on paper. On either route, have the calculations, the padstone sizes and the propping plan finished before a start date is fixed, because the steel supplier cuts to the approved length and section, not to an estimate.
Party wall beams in Havering homes
Because many Havering homes are semis or terraces, the wall a beam bears into is frequently the one you share with next door. The chimney breast and the dividing wall between two semis usually sit on a party wall, which brings the Party Wall Act into play. You serve notice on the adjoining owner in good time, as building owner or through your surveyor, and a schedule of condition is agreed so both households are protected before the steel goes in.
Chimney breast removal is another common request in these homes, where a redundant stack eats into a bedroom or reception room. Taking it out means supporting the masonry above on a steel beam, or on gallows brackets only where the engineer and building control accept them, again designed by an engineer and inspected by building control. Whether you are in RM11 Hornchurch or an RM2 street near Raphael Park, we appoint the engineer who produces the structural calculations and carry out the physical work as one managed job.
If the beam bears into a shared wall, the Party Wall etc. Act applies to the work. You serve the notice, your neighbour either consents or appoints a surveyor, and we work to the award that follows. We are not party wall surveyors and never act as one.
- Party wall process explained, and the beam built to the award
- Making good, plastering and finishing around the new steel
- Level, plumb and deflection checks before props are struck
VOA Council Tax stock of properties, March 2025, for all 30 statistical areas in Havering. Counts rounded by the VOA.
Trusted RSJ and Steel Beam Installation in Havering
Havering homeowners choose GS Renovation for steelwork because we bring the engineer, the propping, the demolition and the building control sign-off together under one team. With our founder's 30+ years on the tools, we know how these interwar semis are built, we coordinate around the party wall award properly, and we leave the opening square, supported and ready for finishing.
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…
Giorgio is an excellent and intelligent workman, and with very reasonable prices! He installed a kitchen extractor fan in a complicated situation…
George was very friendly and helpful from start to finish. He worked really hard to ensure our kitchen was installed to a high standard and was…
FAQ
Frequently Asked Questions about RSJ and Steel Beam Installation Havering
What drives the cost of RSJ and steel beam installation in a Havering home?
What sits behind the walls moves the price of RSJ and steel beam installation in Havering far more than the address does, within £1,500 to £4,000 for one beam opening (indicative). In practice the masonry at each bearing decides the padstone detail, and that is only settled at the RM1 survey. Older Havering stock adds making good and awkward access adds labour, so both are itemised. Ring 07472 424 226 before comparing figures.
Do I need a party wall notice to remove a wall in my Hornchurch semi?
Very likely, yes. In Havering's semi-detached homes the dividing wall or chimney breast is often shared with your neighbour, so the Party Wall Act applies and you must serve notice before work starts. You serve the notice as building owner, or your surveyor does, and a schedule of condition is agreed. We give you the engineer's drawings, plan the timing and build to any award, so the steel beam goes in without dispute.
What does the engineer need to size an RSJ for my Havering home?
The span, everything that sits on the wall, and what the ends will bear onto. That means checking whether joists land on the wall, whether a wall or chimney stands above it, and whether roof loads come down through it. Small areas of plaster may be opened to see the brickwork. The calculations then go to building control before any steel is ordered.
Where does the steel bear in a cavity walled Havering house?
Usually on the inner leaf, on a padstone sized to spread the point load. Interwar houses were often built with cavity walls, and bridging the cavity with steel or concrete can carry damp inwards, so the engineer details the bearing to keep the outer leaf separate. If the inner leaf is weak, it is rebuilt locally before the beam is set down.
How does a long RSJ get into a Havering semi?
Most semis have side access, so the steel can be carried down the flank of the house and in through the rear. The route is measured at survey, because an extra long section may not turn inside a hallway. Where it cannot, the engineer designs it in two pieces bolted together on site. Heavier sections may need a small lifting team.
Can I leave the RSJ exposed as a feature in my Havering kitchen?
You can, but bare steel still needs fire protection. The options are intumescent paint, which keeps the steel look, or boxing it in with fire rated board, and building control has to accept whichever is used. The finish is chosen before installation, because intumescent coatings need clean steel and a set thickness applied properly, and the inspector checks the bearings before any coating goes on.
Is a building notice cheaper than full plans for a steel beam in Havering?
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. What changes is where the risk sits. A building notice lets work start sooner, but nobody has checked the beam size before the wall is opened. Full plans moves that check to the drawing stage. For a long span, or steel carrying a wall above, the drawing stage is the better place to find a problem.
How much notice does Havering building control need before a beam goes in on a building notice?
Havering asks for a building notice application at least 48 hours before work starts. Treat that as the last step, not the first. The structural engineer we appoint sizes the beam, the steel is ordered to that size, the props and padstones are planned, and any party wall notice the building owner has served has run its course. Only then does the notice go in, so the inspector's first visit lines up with the steel sitting on its bearings and the padstones still visible.
Does a deeper Havering rear extension under prior approval change the beam into the house?
It can. 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. Depth alone does not size the beam, but a deeper room often brings a wish to open more of the old rear wall so daylight reaches the middle of the house. A wider opening means a longer beam, heavier loads at each end, and piers or posts that may need their own foundations. Fix the depth and the opening width first, then have the steel designed.
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