RSJ and Steel Beam Installation Teddington
Steel beam and RSJ installation in Teddington, 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 Teddington, from the bay-fronted Victorian and Edwardian terraces off the High Street to the riverside homes near the Thames. We handle load-bearing wall removal, propping and building control sign-off as one accountable job under Richmond Council.
In Teddington, 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 Teddington.
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 Teddington address and an itemised quote.
- The engineer we appoint sizes the beam, and the work is registered with Richmond 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.
Sizing steel beams for Teddington terraces
Teddington's terraces carry real load through their solid brick walls, so every RSJ we install is sized by a structural engineer, not guessed at. The engineer calculates the span, the point loads from the floors above and any masonry the beam must support, and we order steel to that specification. On a typical TW11 rear-to-middle knock-through, the beam bears onto engineered padstones set into the retained brickwork so the new opening stays true for decades.
Before any masonry comes down, we install temporary propping to hold the floors and roof safely, then work through a staged demolition rather than pulling a wall out in one go. This controlled sequence protects the closet wing, the chimney breast and the neighbouring party wall. Once the RSJ is seated and levelled, we pack, pin and make good, then arrange the building control inspection that signs the beam off.
Housing in Teddington
By the valuation list's count, Teddington holds about 11,670 homes, 51% houses and 49% flats; by age, 40% were built before 1919, 13% between the wars and 47% since 1945. Terraced houses make up 27% of homes here, and a beam in a terrace in Teddington often bears on the party wall, bringing in the Party Wall Act.
Booking the beam inspection into a Teddington steel programme
Richmond's inspection framework lists steel and timber beams (IL03) as an additional inspection item, so on a Teddington job the beam is an inspection stage in its own right. That changes the order of trades. Once the steel is seated and packed, nothing goes over it: no plasterboard, no fire boarding, no casing. We leave the bearings, the padstones and the packing on show and book that visit before the plasterer is programmed, so a finished ceiling never has to be cut open for an inspector to see a padstone.
The housing also decides what the beam sits on. With 40% of Teddington homes built before 1919 and 47% after 1945, a beam here can land in a solid brick Victorian wall or in a post-war cavity wall. Solid brick spreads the load through one thick wall, while each leaf of a cavity wall has far less to offer, so a padstone that suits one can be wrong for the other. We open the wall at each bearing position before steel is ordered, and the structural engineer we appoint sizes the padstone to what is actually there.
Party wall notices in Teddington TW11
Many Teddington terraces share their chimney stacks and dividing walls with the house next door, which means removing a wall or cutting a beam pocket into a party wall falls under the Party Wall Act. We flag this early, help you serve the correct notices on your neighbours and keep the paperwork clear so the structural programme is not held up. Getting this right at the start avoids disputes once the propping is in and the steel is on site.
Because the terraces here sit close together, we plan access, dust protection and skip placement to suit a tight TW11 street, working cleanly in an occupied home. Whether you are opening the ground floor for a kitchen-diner or forming a wider opening between two reception rooms, we coordinate the engineer, the steel supplier and Richmond Council's building control so the load path is proven and the sign-off is straightforward at completion.
- Goalpost frames where two walls meet at a corner
- Beam boxing, fire protection and plasterboard encasement
- Access and lifting plans for restricted terraced and town-centre sites
VOA Council Tax stock of properties, March 2025, for Teddington North, Teddington Central and Hampton Wick & Teddington East. Counts rounded by the VOA.
Why Choose GS Renovation in Teddington
Teddington homeowners choose GS Renovation because one team runs the whole structural job, from appointing the engineer who produces the calculations to the propping, the RSJ and the building control certificate. With our founder's 30+ years on the tools, we prop safely, seat beams on proper padstones and leave the opening true, tidy and fully signed off.
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…
Saaid is the best craftsman I have worked with. He knows what he is doing from the very beginning. He has a great knowledge of construction…
FAQ
Frequently Asked Questions about RSJ and Steel Beam Installation Teddington
How does your RSJ and steel beam installation price in Teddington compare with a national firm's?
A GS Renovation price for RSJ and steel beam installation in Teddington compares well with a national firm's because there is no head office to fund, and both should sit within £1,500 to £4,000 for one beam opening (indicative). GS Renovation is the contractor doing the work at TW11, not a broker adding a margin. Compare the scope, including building regulations approval of the engineer's beam design, not just the total.
What happens to the airbricks when a Teddington wall is altered?
They are kept clear and working, because they ventilate the floor void. Your Teddington house with a suspended timber ground floor relies on airbricks to keep air moving beneath it, and blocking or building over them allows moisture to build up and the joists to decay. Where an opening or a new bearing affects one, the ventilation path is maintained or replaced as part of the work.
Does a steel bearing in a Teddington external wall risk damp or cold?
It can, and the detail is designed to prevent it. Where a beam bearing sits in the external wall of your Teddington house, steel conducts heat readily and can become the coldest surface in the room, which is where condensation forms. The cavity is closed correctly, insulation is maintained around the bearing and the damp proof course is kept continuous. Getting that wrong produces a damp patch that looks like a leak.
Can a beam be craned into a Teddington property?
Rarely, and it is usually unnecessary. Most Teddington streets are residential with parked cars, trees and no space for an outrigger, so beams are carried in by hand instead. Where a section is too heavy or too long for that, the engineer is asked at design stage for a spliced beam bolted together in position. Deciding this before fabrication avoids a beam that cannot reach the opening.
What certificate is issued after steelwork in a Teddington house?
A completion certificate from the building control body once the work has been inspected and signed off. It is the document that matters when a Teddington house is sold, and a buyer's solicitor will ask for it alongside the engineer's calculations. We arrange the inspections at the right stages so the certificate is issued rather than left outstanding on a job that was otherwise finished properly.
Can a Teddington opening be widened later?
It is possible and it is a second structural project rather than an adjustment. Widening an existing opening at a Teddington property means a longer beam, new bearings and fresh calculations, and the finished room has to be opened up again. Where a wider opening might eventually be wanted, it is far cheaper to design for it now than to revisit a plastered and decorated wall.
Could a timber beam be used instead of steel in a Teddington house?
Sometimes, and Richmond treats the two alike for inspection: its framework lists steel and timber beams together as item IL03. An engineered timber beam is lighter to carry through a terraced house and easier to fix to, but for the same span and load it is usually deeper than steel. That depth comes off the head height of a door or shows as a downstand, so the structural engineer we appoint compares both before the opening height is fixed.
We would rather use an approved inspector for our Teddington beam. What changes?
If an Approved Inspector is used instead of Richmond Council's Building Control service, an Initial Notice must go to the Council before work commences. The order is therefore fixed: appoint the inspector, let the notice go in, then set the props. We ask for confirmation that the notice has been submitted before the Teddington opening is started, and we send the inspector the engineer's calculations at the same time, so the bearing details are agreed before the wall is cut.
How does a long beam get into a Teddington terrace with no side access?
Through the front door, or in pieces. 27% of Teddington homes are terraced houses, and a mid terrace has no side path, so every length of steel travels through the hall and round the stair. Where the span is too long for that turn, the structural engineer we appoint can design the beam in two sections with a bolted splice, fabricated to drawing and joined in the room. We measure the route from the pavement at the survey.
Every Service, One Team
More GS Renovation Services in Teddington
One team for every GS Renovation service in Teddington:
Same Service, Nearby Areas
RSJ and Steel Beam Installation Near Teddington
We carry out RSJ and steel beam installation across Teddington and the surrounding areas. Explore a nearby location:
Ready to Start Your Teddington Project?
Free, no-obligation quote for RSJ and steel beam installation in Teddington.