RSJ and Steel Beam Installation Paddington
Steel beam and RSJ installation in Paddington, 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 across Paddington's Victorian stucco townhouses, from the terraces near Hyde Park to the listed and conservation-area houses elsewhere in W2. We remove load-bearing walls, fit RSJs sized by the engineer onto proper padstones, and keep every stage signed off by building control.
In Paddington, 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 Paddington.
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 Paddington address and an itemised quote.
- The engineer we appoint sizes the beam, and the work is registered with Westminster City 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 Paddington
Paddington's period townhouses were built with solid masonry, and internal walls frequently carry floor and roof loads, so opening up a ground floor is rarely a simple demolition. A structural engineer sizes the steel beam or RSJ for the span, and we cast concrete or engineered padstones to spread the bearing into the solid walls. Temporary propping holds the structure while we take the old wall down in safe, controlled stages.
Because many W2 houses share a party wall with the neighbouring townhouse, and dividing walls and chimney stacks often sit within it, the Party Wall Act frequently applies. You serve the notices on adjoining owners as building owner in good time, using the drawings we supply. Building control inspects the beam, its bearings and the propping before sign-off, and where the house is listed, listed building consent is needed for the internal work as well, which we confirm before any wall comes out.
Housing in Paddington
Of the 11,790 homes the valuation list records in Paddington, 47% were built before 1919, 11% between the wars and 42% since 1945; 92% are flats and 8% are houses. Most homes here are flats, and a beam in a leasehold flat in Paddington needs the freeholder's licence for alterations, since the lease usually keeps the structure with the freeholder.
Westminster approval and timing for a Paddington steel beam
Steel for a Paddington opening is ordered against an approved design, so the Westminster timetable sits in front of the fabricator's. Westminster City Council runs its own building control service, the District Surveyors Building Control Service, and on a full plans application it aims to contact you within 5 weeks with a decision, while saying it may take longer. We build that wait into the programme rather than booking the lift of the beam first. The structural engineer we appoint issues calculations early enough to travel with the application, and any query from the district surveyor goes back to the engineer, not to site.
Westminster's schedule of fees and charges, which took effect on 1 April 2026, has one minor works charge for new openings in a structural wall where the job is a single property with fewer than 5 openings. With 92% of Paddington homes being flats, that single property is usually your flat, so every opening you want belongs on one application rather than a series. Once approval is in hand, the start date goes to Westminster at least 2 days before work begins. We send it before the props go up, so the first inspection lands while the bearings are still open.
Steel beams for Paddington's period homes
The tall ceilings and generous reception rooms typical of Paddington's early and mid-Victorian stock give room for deep beams, but the age of the fabric means every bearing point must be checked. We expose the wall head and confirm what sits above, whether that is a chimney breast, a masonry upper wall or timber joists, then match the padstone and beam to the real load path rather than an assumption.
On a knock-through between the front and rear receptions, or when forming an opening to a rear return, we manage the whole sequence, from propping and steelwork to making good the plaster, cornicing and flooring so the finished room reads as original. Fire protection to the steel, correct bearing lengths and a clean structural opening all form part of the building control sign-off we arrange on your behalf.
- Building control applications and inspection sign-off
- Ceiling and floor levels resolved where the beam sits below joists
- Temporary propping and staged, controlled demolition
VOA Council Tax stock of properties, March 2025, for Paddington & St George's Fields and Bayswater East. Counts rounded by the VOA.
The GS Renovation Difference in Paddington
Paddington homeowners choose GS Renovation because structural work in listed and period W2 houses demands care, not shortcuts. One team appoints the engineer for the calculations, carries out the propping and books the building control sign-off, then makes good the period detail. With our founder's 30+ years on the tools, we protect both the fabric of your home and your relationship with the neighbours.
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 Paddington
What does the RSJ and steel beam installation quotation for a Paddington home cover?
The RSJ and steel beam installation quotation for a Paddington home covers the whole job through to sign-off, typically within £1,500 to £4,000 for one beam opening (indicative). It lists the structural work, the following trades, building regulations approval of the engineer's beam design, and the making good at W2, with the engineer's design shown as its own line. GS Renovation issues it in writing so you have something to hold us to.
Do Paddington stucco terraces need particular care when a steel beam goes in?
Yes, because the front elevation is rendered and unforgiving. The stucco fronted terraces around Paddington were built with soft mortar and lime render that shows movement as visible cracking, so the temporary works matter as much as the beam. Loads are taken on needles and props to the engineer's design before any masonry is cut, and the structure is watched while the beam is seated and pinned up.
Is a Paddington flat conversion likely to have had walls removed already?
Often, and that history has to be established before anything more comes out. Many Paddington houses were divided into flats over several decades, and openings were sometimes formed without records or approval. The engineer looks for earlier beams, short bearings and unsupported ends before designing new work, because a fresh opening in a wall already carrying an undersized beam is a different calculation entirely.
How is steel delivered to a Paddington property on a busy street?
By settling the route before the beam is ordered. Streets around Paddington carry heavy traffic, controlled parking and in places a red route, so a beam cannot simply be unloaded at the door. We arrange the permits and the timing, and where the frontage will not take a delivery the engineer is asked at design stage for a spliced beam that arrives in shorter lengths.
What happens when a Paddington chimney breast sits inside the wall being opened?
The stack above has to be carried before the wall goes. In Paddington terraces the breast frequently sits within the wall an owner wants opened, and the masonry above it continues to the roof, so the beam carries the stack as well as the floor. The engineer sizes for that combined load. Where the stack is shared with the house next door the Party Wall etc. Act is engaged.
Who is liable if a Paddington neighbour's property is damaged?
It depends on what caused it, which is why condition is recorded first. Where the Party Wall etc. Act applies to your Paddington property, the surveyors document the neighbouring property before work starts, and any claim is assessed against that record. Damage caused by the works is the responsibility of the building owner, whose contractor carries public liability cover for exactly that situation.
When can the steel go in at a Paddington flat if we apply for full plans?
We install it once Westminster has decided the application, rather than building ahead of approval and risking changes to steel already in place. Westminster building control aims to contact applicants within 5 weeks with a decision on full plans, and says it may take longer. The start date must then reach Westminster at least 2 days before work begins. We confirm the section size with the structural engineer we appoint while the application is being assessed, so the fabricator can be booked the day approval arrives.
Does Westminster charge separately for each new opening in a Paddington flat?
Not while there are fewer than 5. Westminster's schedule has a single minor works charge for new openings in a structural wall, covering one property with fewer than 5 openings, and it is the same whether you use a building notice or full plans. Two openings, say one into the kitchen and one into the hall, sit under that one charge if they go in on one application. Adding another opening later means a further application, so settle the whole layout first.
Can an RSJ go into a Paddington flat in a block built in 2000 or later?
Sometimes, but the question is different from a stucco conversion. 19% of Paddington homes were built in 2000 or later, and a block of that age can have a concrete or steel frame rather than loadbearing brick. The wall you want to open may carry nothing, or may be a concrete wall that no steel beam can replace. The structural engineer we appoint starts from the block's as-built drawings, which the managing agent may hold, before anyone designs a beam.
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