GS Renovation installs RSJ beams in Leatherhead homes, building to calculations produced by the structural engineer we appoint. Building control for Mole Valley is run by the Southern Building Control Partnership, which lists a structural elements inspection to be called before steelwork is covered up. We coordinate that application and those inspections. Fully insured, with free no obligation quotations.
Steelwork has to be seen before it is covered up
The Southern Building Control Partnership lists a structural elements inspection, called before structural timbers, steelwork or concrete are covered. On an RSJ that means the beam, its padstones and its bearings are looked at while they are still open to view. We appoint a structural engineer to size the steel and design the bearings, then build to those calculations and book the stage.
The end of the job is notified as well. Completion has to be told to the Southern Building Control Partnership within five days of the work finishing. We hold the calculations, the application and the inspection bookings together, so you have one point of contact rather than three parties to chase.
Building control for a Leatherhead RSJ is not run by the council
Mole Valley District Council does not run its own building control service. The Southern Building Control Partnership is its Local Authority Building Control team, so the application and the inspections for a beam in a Leatherhead house go there. We make that application and book the visits as part of running the job.
Cost follows the span, the number of openings and the making good. Indicative London ranges, MyBuilder and Checkatrade, 2026, put an RSJ beam alone for one straightforward opening at £1,500 to £4,000. A full knock through, including wall removal, engineer fee and making good, runs from £2,500 to £6,500+. We quote after seeing the wall, free and with no obligation.
What sits under the wall changes the bearing detail
The ground varies between Leatherhead streets, and the engineer checks what a bearing lands on before specifying it. The British Geological Survey maps the bedrock under Leatherhead High Street as chalk, and records no superficial deposits above it. There the beam bears on masonry standing over chalk.
A few hundred metres away the picture changes. Bull Hill is mapped as Lambeth Group, described as clay, silt and sand, with Head deposits over its southern end. North Street is split: its western half sits on Thanet Formation sand and its eastern half on chalk. Where a bearing reaches down to ground level, that difference decides what the pad beneath it has to do.
- Making good, plastering and finishing around the new steel
- Goalpost frames where two walls meet at a corner
- Steel delivered cut, drilled and primed to the engineer's schedule
- Existing pipework and cabling diverted around the new opening
- Concrete and high-density padstones at every bearing
The GS Renovation Difference in Leatherhead
An RSJ job in Leatherhead stands or falls on sequencing. The steel, the padstones and the bearings have to be inspected before anything closes in, and building control sits with the Southern Building Control Partnership rather than with the council. We appoint the structural engineer, build to the calculations, and book the stage before the boxing goes on. We are fully insured, we coordinate the building control application and inspections, and quotations are free and carry no obligation.
- Founder-led team with 30+ years of hands-on experience
- Free, no-obligation quotations
- A dedicated project manager from first survey to handover
- Beams boxed and fire protected to the approved detail
- Levels and deflection checked before the props come out
- Fully insured, with cover in place on every site