Wraparound extensions in Bangor, Gwynedd and Anglesey

Covering Bangor, Gwynedd and Anglesey

We work in Bangor, Gwynedd and Anglesey (LL57) and the places around it, including Llangefni, Caernarfon and Colwyn Bay.

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 wraparound extension involve?

Because it removes two external walls, a wraparound needs careful structural design and a good plan for the corner where the steels meet. We design, apply for any permissions, build and finish the shell, and can fit the kitchen as part of the same contract.

Party wall process with both neighbours if needed
Pitched, flat or glazed roof with rooflights
Optional kitchen supply and installation

What is the guide price for a wraparound extension in Bangor, Gwynedd and Anglesey?

What wraparound extensions typically cost. These are guide ranges; the written quote for your house replaces them.

Wraparound extensions	Guide price incl. VAT
Standard specification	£3,400 to £3,800 per m²
Good specification	£3,800 to £4,250 per m²
High specification	£4,250 to £4,700 per m²

What approvals does a wraparound extension need in Wales?

In Wales the planning rules, including what counts as permitted development, are set by the Welsh Government, and Welsh building regulations differ in places from England’s. We check both against your house before drawings are finalised, and handle party wall notices where needed.

Wales has its own permitted development rules, set by the Welsh Government. Small single-storey rear extensions can often go ahead without an application, but the limits differ from England's and there is no larger-extension prior approval route, so we check the current Welsh rules for your house before drawings are finalised.

What should Bangor, Gwynedd and Anglesey homeowners check first?

Both neighbours may need party wall notices.
An open-plan space this size needs a heating plan, often underfloor heating.

What are the steps?

Tell us about the project. Call, use the guide price tool or send the form with a few photos and a postcode.
Free site visit. We measure up, look at access, drains and the structure, and talk through options and budget.
Price and paperwork. The design is priced line by line, and we submit the planning and building control applications.
Construction and completion. One site lead co-ordinates every trade through to the building control certificate.

Your questions answered

How much does a wraparound extension cost?

Typically £3,400 to £4,700 per square metre including VAT. Many come in between £85,000 and £120,000 before the kitchen.

Can we keep part of the kitchen working?

Often, by sequencing the work so the old back wall comes out last. We agree a plan with you before starting.

Can you visit a house in Bangor, Gwynedd and Anglesey to quote?

Yes. After a short call we arrange a site visit to measure up and agree what the design needs to do, then send a written price.

Also covering

Learn more about wraparound extensions, or see every project we cover in Bangor.