Extensions, Loft Conversions
& Structural
Alterations

A typical RSJ beam installation in Bristol costs between £1,500–£4,500 depending on beam size, span length, access, and complexity. This includes structural engineer calculations, the steel itself, installation labour, building control fees, and making good. We always provide a detailed, transparent quote before any work begins — no hidden costs, no surprises.

Yes — all structural steel installations in the UK require calculations from a qualified structural engineer to comply with Building Regulations. Don't worry though, we handle this for you. We source the structural engineer calculations, liaise with building control, and make sure everything is compliant before any work starts.

Most single-beam RSJ installations take 1–2 days. More complex multi-beam jobs may take 2–3 days. This includes temporary propping, wall removal (if applicable), beam installation, padstone fitting, and initial making good. We always provide a clear timeline before work begins so you know exactly what to expect.

In most cases, no. Internal steel beam installations fall under Building Regulations, not planning permission. However, you will need building regulations approval — and a completion certificate once the work is finished. This certificate is essential when you come to sell your property. We handle the entire building control process for you as part of our service.

When done correctly, cracking is extremely unlikely. Problems occur when installers cut corners — insufficient temporary support, undersized beams, or poor padstone installation. We follow every structural engineer specification exactly, use proper Acrow prop support throughout, and ensure bearings and padstones are installed correctly. That's why we have zero structural failures in over 10 years.

We serve Bristol and all surrounding areas including Bath, Weston-super-Mare, Clevedon, Portishead, Keynsham, Thornbury, Yate, Trowbridge, and throughout Somerset, South Gloucestershire, and North Somerset. If you're not sure whether we cover your area, just give us a call.

Our quotes include everything: structural engineer calculations, building control application and fees, steel beam supply, installation labour, temporary support (Acrow props), padstones, and making good after installation. We break down every cost so you can see exactly where your money goes. No hidden extras.

As a rule of thumb, if a wall runs perpendicular to your floor joists, it's likely load-bearing. But guessing isn't good enough when it comes to structural work. During our free site survey, we'll assess your walls properly and confirm exactly what's needed. A structural engineer then provides the definitive answer with their calculations.