Party wall beam works · Caernarfon
Party wall beam works in Caernarfon
Party wall beam works in Caernarfon, from free survey to completion certificate.
- Survey, design and installation in one
- Covering LL55
- Inspected before it is covered
- Free survey visit
- Engineer's calculations arranged
- Building control handled
- Fixed written price once scope is agreed
- England, Wales, mainland Scotland & NI
Party wall beam works in Caernarfon: how it works
Party wall beam works in Caernarfon are planned around the house, not a standard kit. We also cover the surrounding towns and villages in Gwynedd. We visit, measure and check what the wall carries, then arrange calculations and building control approval before any steel is ordered.
We plan the structural work around that process. Where notices are needed, we arrange them through a party wall surveyor and build the notice period into the programme. We do not give legal advice, but we make sure the beam design, calculations and method statement are ready for the surveyors to check.
Worth knowing before you start
- Cutting into a party wall is noisy on both sides and can disturb loose plaster or pictures next door. Telling the neighbour the dates in advance, protecting their side where access is agreed, and keeping to agreed hours all help the work go smoothly.
- If there is a dissent, the owners can appoint one agreed surveyor to act impartially for both, or a surveyor each. Either way, the surveyors' role under the Act is to resolve the dispute fairly, not to act as advocates for one side.
- Cutting a pocket into a shared wall needs care, because the wall also supports the neighbour's floors and roof. The engineer specifies how the pocket is formed and packed, and props or needles may be needed to keep both houses supported while it is cut.
- Party walls in older terraces are often solid brick with lime mortar, and may carry both houses' chimney flues. The engineer checks the wall's condition and thickness where the beam will bear, and the bearing position may be adjusted to avoid flues still in use.
- Surveyors' fees under the Act are normally the responsibility of whoever is having the work done. Costs rise with the number of adjoining owners, whether each appoints their own surveyor, and how much checking the beam design and method need.
Four stages, one team
Survey in Caernarfon
We visit, look at the wall and what sits above it, measure the opening and note services, access and how the steel can be brought in.
Engineer's design
A structural engineer sizes the beam, padstones and any posts, and sets out the temporary support needed while the wall is out.
Building control
We submit the application or notice to Cyngor Gwynedd under the Building Regulations as they apply in Wales, before work starts.
Install and sign-off
Props go in, the opening is formed, the steel is set and packed, building control inspects it, and we make good.
Guide prices for party wall beam works in Caernarfon
As a guide, budget £820–£1,820 per neighbour including VAT for party wall surveyor (agreed surveyor, per neighbour) in Caernarfon, based on published UK cost guides adjusted for prices in Wales (-9%).
| Job | Typical guide range | What it usually covers |
|---|---|---|
| Party wall surveyor (agreed surveyor, per neighbour) | £820–£1,820 per neighbour | Schedule of condition and award where a neighbour dissents; serving notice alone, where the neighbour consents, costs far less (England and Wales only) |
| Side return extension steelwork | £3,200–£7,750 | Beams and posts along the old side wall line, propping and approvals (extension build extra) |
| Chimney breast removal (ground floor) | £1,350–£2,750 | Ground-floor breast removed, steel to support the breast above, building control and making good |
| Building control fees | £230–£590 | Application fee and inspections under the Welsh building regulations; varies by council or approver |
Figures include our approximate regional adjustment for prices in Wales (-9%) and are rounded. How these figures are worked out.
Building rules for Caernarfon
In Wales, structural alterations come under the Building Regulations 2010 as they apply in Wales. Cyngor Gwynedd handles building control for Caernarfon. For work started or approved from 1 July 2026, the Welsh system uses an application to building control, dutyholders appointed in writing, a commencement notice before work starts and a compliance statement at the end.
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.
Party wall beam works 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
Local questions answered
Can I stay at home while the work is done in Caernarfon?
Usually, yes. The work area is screened and floors are protected. The rooms either side of the opening are out of action for a few days, and there is some noise and dust while the masonry comes out.
How much notice do I need to give my neighbour?
At least two months for a party structure notice, which is the notice needed for cutting into a party wall to take a beam. The neighbour can agree in writing to an earlier start, but that cannot be assumed. Building the notice period into the programme early stops it delaying the rest of the job.
Can my neighbour stop me putting a beam in the party wall?
Generally no. The Party Wall etc. Act 1996 gives the building owner the right to carry out notifiable work, such as cutting in a beam bearing, provided the proper procedure is followed. A neighbour can dissent, which leads to surveyors setting conditions in an award, but this regulates the work rather than preventing it. Take legal advice on specific disputes.
Who pays for the party wall surveyor?
Normally the building owner, meaning the person having the work done, pays the reasonable fees of the surveyors for both sides, because the work is for their benefit. Fees vary with the number of neighbours affected and the complexity of the work, which is why they sit as a separate item in our quote.