Gwynedd · Wales
Steel beam installers in Caernarfon
RSJs and steel beams for homes and businesses in Caernarfon, with calculations, approvals, propping and making good.
- Free survey visit in Caernarfon
- Engineer's calculations arranged
- Building control handled for you
- Free survey visit
- Engineer's calculations arranged
- Building control handled
- Fixed written price once scope is agreed
- England, Wales, mainland Scotland & NI
Steel beam work in Caernarfon
We install steel beams and RSJs in Caernarfon, covering LL55. We also cover the surrounding towns and villages in Gwynedd. Common jobs here are knock-throughs, load-bearing wall removal, chimney breasts and openings into new extensions.
In Caernarfon, beam work is approved under the Building Regulations as they apply in Wales, and the Party Wall etc. Act 1996 applies to shared walls.
Services in Caernarfon
Wall removal & knock-throughs
- Load-bearing wall removal
- Kitchen-diner knock-throughs
- Through-lounge knock-throughs
- Chimney breast removal
New & wider openings
- Wider doorways & openings
- Bi-fold & sliding door openings
- Garage conversion openings
- Lintel replacement
Extensions, lofts & basements
Beams, frames & columns
Design & approvals
- Structural calculations
- Building control sign-off
- Party wall beam works
- Fire protection for steel beams
Site works & commercial
From survey to sign-off in Caernarfon
Free visit
A short visit to Caernarfon to see the job, agree what you want and check the bearings, floors and services that affect the design.
Calculations
The engineer's calculations and a simple drawing are prepared for your opening and shared with you before anything is ordered.
Building control
We submit the application or notice to Cyngor Gwynedd under the Building Regulations as they apply in Wales, before work starts.
Steel in, made good
On site we prop, open up, fit and pack the steel, then fire protect, box in and plaster once the inspection is done.
Guide prices in Caernarfon
As a guide, budget £1,800–£4,550 including VAT for load-bearing wall removal with steel beam in Caernarfon, based on published UK cost guides adjusted for prices in Wales (-9%).
| Job | Typical guide range | What it usually covers |
|---|---|---|
| Load-bearing wall removal with steel beam | £1,800–£4,550 | Typical internal wall up to about 4 m: calculations, building control, propping, steel, padstones, fitting, fire protection and making good |
| Chimney breast removal (ground floor) | £1,350–£2,750 | Ground-floor breast removed, steel to support the breast above, building control and making good |
| Rear wall opening for bi-fold or sliding doors | £2,300–£6,350 | External wall opened up to about 5 m with steel, propping, cavity tray and making good (doors supplied separately) |
| Loft conversion steels | £2,300–£5,450 | Supply and fit of floor and ridge steels on padstones, including lifting into the roof space |
| Structural calculations for a beam | £230–£680 | Site measure or photos, beam and padstone design and calculations for building control |
Figures include our approximate regional adjustment for prices in Wales (-9%) and are rounded. How these figures are worked out.
Building rules in Caernarfon
Welsh building regulations treat beams and new openings as controlled building work. We apply to Cyngor Gwynedd on your behalf before anything is removed, give the commencement notice the 2026 Welsh rules require, and the steel is checked before it is boxed in.
Where the steel bears into a wall shared with next door, notice must be served under the Party Wall etc. Act 1996. If your neighbour dissents, surveyors agree how the work is done before it starts.
Near Caernarfon
- Menai Bridge 7.6 mi
- Llangefni 8.1 mi
- Bangor 8.6 mi
- Porthmadog 15.8 mi
- Pwllheli 18.4 mi
- Holyhead 18.8 mi
Steel beams in Caernarfon: questions
Do I need a party wall agreement for steel beam installation in Caernarfon?
Yes, if the beam bears into a shared wall: the Party Wall etc. Act 1996 applies in England and Wales, and a party structure notice must be served at least two months before that work starts. We arrange it through a party wall surveyor.
Do you cover Caernarfon for steel beam installation?
Yes. We carry out steel beam installation in Caernarfon and the LL55 postcode districts. Book a free survey visit and we will check the wall, arrange the engineer's calculations and send an itemised written quote.
Who approves steel beam installation in Caernarfon?
Structural work in Caernarfon needs a building control application to Cyngor Gwynedd under the Welsh regulations, with a commencement notice before work starts. We prepare and submit it with the structural engineer's calculations and arrange the inspections, so the completion paperwork follows the job.
Can you work on older or listed homes in Caernarfon?
Yes. Older homes often have lime mortar, timber lintels or shallow footings, which the engineer allows for. Listed buildings need listed building consent for internal structural changes as well as building regulations approval, and that must be in place first.
How soon can steel beam installation start in Caernarfon?
Start dates depend on the engineer's calculations, the building control approval and, where needed, party wall notice periods. We give you a realistic timetable after the survey and keep you updated as each approval comes through.