Structural alterations in Caernarfon

Covering Caernarfon

We work in Caernarfon (LL55) and the places around it, including Llangefni, Bangor and Pwllheli.

Homes in Gwynedd and Anglesey

Welsh homes include long terraces built into hillsides, stone cottages and modern estates, and sloping sites often shape how and where an extension can go.

What does a structural alteration involve?

We arrange the structural calculations, support the floors and roof above with temporary props while the wall comes out, install the steel on padstones, then encase it for fire protection and make good. Chimney breast removals and new openings in external walls follow the same process.

Structural engineer’s design and calculations
Building control application and inspections
Making good floors, walls and ceilings

How much does a structural alteration cost in Caernarfon?

Guide prices for structural alterations, including VAT where it applies. Your fixed price is confirmed in writing after the survey.

Structural alterations	Guide price incl. VAT
Single load-bearing wall removal with steel	£3,000 to £7,500
Chimney breast removal with support	£1,800 to £4,500
Multiple walls or full open-plan remodel	£8,000 to £20,000

What approvals does a structural alteration need in Wales?

Planning decisions in Wales are made by the local council, using permitted development rules set by the Welsh Government rather than England’s. Building regulations in Wales have their own approved documents, and the Party Wall etc. Act 1996 applies to work on shared walls and boundaries.

Internal work like this does not usually need planning permission in Wales unless the building is listed. Building regulations approval is needed for the structural work.

What can change the price or programme?

Shared chimney breasts and walls can involve the Party Wall Act.
Pipes and cables in the wall need rerouting first.

What happens after I enquire?

Send us the details. Give us a postcode, a rough idea of size and some photos, by phone, form or the guide price tool.
Free site visit. We measure up, look at access, drains and the structure, and talk through options and budget.
Drawings, approvals, written quote. We prepare the design, apply for the approvals it needs, and give you a fixed price in writing.
Construction and completion. One site lead co-ordinates every trade through to the building control certificate.

Questions about a structural alteration in Caernarfon

Do I need building regulations approval to remove a wall?

Yes, for any load-bearing wall. Non-structural partitions usually do not need approval.

How do I know if a wall is load-bearing?

We check on site and confirm with the structural engineer.

How do I get a price for structural alterations in Caernarfon?

Use the guide price tool for a ballpark figure, then book a visit for a fixed written price for the agreed specification.

Also covering

Learn more about structural alterations, or see every project we cover in Caernarfon.