RSJ and Steel Beam Installation Charlton

GS Renovation installs RSJs and steel beams across Charlton, working on the Victorian and Edwardian terraces and interwar houses of the SE7 streets around Charlton Village and Charlton Park. We remove load-bearing walls safely and open up these homes without cutting corners.

In Charlton, 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 Charlton.

How the job runs

1. Free site survey at your Charlton address and an itemised quote.
2. The engineer we appoint sizes the beam, and the work is registered with the Royal Borough of Greenwich building control or an approved inspector. On a shared wall you serve the party wall notice as building owner; we supply the drawings.
3. Props go in, the opening is cut and the beam is set on padstones, packed tight above.
4. Building control inspects the steel before it is covered. We make good, and the completion certificate follows.

Removing load-bearing walls in Charlton terraces

The dividing wall between the front and rear reception in a Charlton terrace is almost always load-bearing, carrying the floor above and often a chimney stack. Before any demolition the structural engineer we appoint calculates the beam, then we set temporary props, cut back in stages and lift the RSJ into place onto concrete or engineering-brick padstones. Every beam we install in SE7 is calculated for the real loads above, never guessed.

Because these houses were built with solid brick walls and shared party walls, careful sequencing matters. We work methodically so the structure above stays supported at all times, protect the rest of the home from dust and debris, and only strike the props once the steel is properly bearing. Building control inspects and signs off the finished installation before we plaster and make good.

Housing in Charlton

Roughly 9,540 dwellings sit on the valuation list for Charlton. 51% are houses and 49% flats, and by age 29% predate 1919, 22% are interwar and 49% post-war. A beam in a terrace in Charlton often bears on the party wall, bringing in the Party Wall Act, and 35% of homes here are terraced.

Steel under the floor between two Charlton flats

49% of homes in Charlton are flats, and in a converted terrace the beam going into a ground-floor flat can end up carrying the floor of the flat above. Under the Party Wall Act a floor separating flats in different ownership can be a party structure, so the owner upstairs may be an adjoining owner entitled to notice, not only the neighbour through the side wall. The freeholder's licence comes first, then the notices you serve as building owner, then the structural engineer we appoint finishes the design with any conditions the other owners have asked for.

The other Charlton opening is at the back. Widening the rear wall of the closet wing into garden doors is a new opening, and Royal Greenwich charges new domestic door or window openings as a line of their own, separate from a knock-through. It also needs its own bearing inspection, booked at least 2 working days ahead like every Royal Greenwich site inspection. Where the brick at a bearing is soft or cracked, the engineer may want the bearing zone rebuilt before the steel arrives, so the booking follows that repair rather than the delivery.

Party wall notices on shared Charlton walls

Many Charlton terraces share a party wall with the neighbour, and the chimney breast or dividing wall you want to remove often sits within it. Where our steelwork bears into or affects that shared structure, the Party Wall etc. Act 1996 applies and you serve notice on the adjoining owner as building owner. We flag this early and give you the drawings it needs, so the legal side runs alongside the build rather than holding it up.

We explain in plain terms which notices are needed, work with your party wall surveyor where one is appointed, and leave time in the programme for the condition of adjoining rooms to be recorded before work starts. This is standard practice on the terraced stock across SE7, from streets near Charlton village towards Woolwich, and handling it properly protects both you and your neighbour for the long term.

Soft brick, lime mortar and older bearings

The Victorian terraces around Charlton Park were built in soft London stock brick laid in lime mortar, which behaves nothing like modern brickwork in cement. Lime is forgiving and lets a wall move, but it is weaker in local compression, so a beam bearing straight onto old brickwork can crush it. The engineer's padstone is sized for that, and it is normally bedded on a wider spread of sound bricks than a newer house would need.

Foundations in this stock are shallow, often little more than a corbel of brick on clay, so we avoid overloading a short length of wall while the props are up. Cutting is done carefully rather than with heavy percussion, since vibration opens joints in lime mortar and cracks plaster in the next room. Where the wall is in poor condition we rebuild the bearing zone in engineering brick first, on the engineer's instruction, before the steel arrives.

• Lintel and catnic support to smaller openings
• Ceiling and floor levels resolved where the beam sits below joists
• Access and lifting plans for restricted terraced and town-centre sites

VOA Council Tax stock of properties, March 2025, for Charlton Village, Charlton Slopes and Hornfair Park. Counts rounded by the VOA.

When comparing RSJ and steel beam installation in Charlton with other work, it helps to read home renovation in Charlton, RSJ and steel beam installation across Greenwich, building control sign-off for a steel beam, the Party Wall Act when a beam bears on a shared wall, our London RSJ and steel beam installation page and Cracks in Walls: When to Worry.

The GS Renovation Difference in Charlton

Charlton homeowners choose GS Renovation because steel work is our flagship trade, not a sideline. We coordinate the engineer's calculations and handle the propping and the building control sign-off as one accountable job. With our founder's 30+ years on the tools, we open up SE7 homes safely and leave the finish neat.

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Structural design is by the consulting engineer appointed to your project.