Covering Gwynedd and Anglesey
We cover Gwynedd and Anglesey, including Bangor, Holyhead, Caernarfon and Llangefni, and the towns around them.
Homes in Gwynedd and Anglesey
Across Wales you find valley terraces, coastal towns, rural stone houses and newer estates, so access, slopes and local materials all feature in the design.
What goes into an upward extension?
An upward extension adds a new storey on top of an existing house, most often turning a bungalow into a two-storey or chalet-style home. It can double the floor area without using any of the garden.
- Structural survey of walls and foundations
- Roof removal and temporary weather protection
- Full fit-out of the new rooms
What is the guide price for an upward extension in Gwynedd and Anglesey?
Guide prices for bungalow and upward extensions, including VAT where it applies. Your fixed price is confirmed in writing after the survey.
| Bungalow and upward extensions | Guide price incl. VAT |
|---|---|
| Chalet conversion with dormers (total) | £45,000 to £85,000 |
| New first floor, standard specification | £2,200 to £2,800 per m² |
| New first floor, good specification | £2,800 to £3,300 per m² |
| New first floor, high specification | £3,300 to £3,800 per m² |
Do you need permission for an upward extension in Gwynedd and Anglesey?
Welsh projects need planning clearance from the council under Welsh rules, building regulations approval under the Welsh approved documents, and party wall notices where the work affects a neighbour’s wall or foundations.
Adding a storey in Wales needs planning permission. We prepare the application with drawings showing how the new roofline fits the street.
What can affect an upward extension?
- The staircase takes space from the ground floor plan.
- Neighbours’ light and privacy are the main planning tests.
How does the project run?
- 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.
- Price and paperwork. The design is priced line by line, and we submit the planning and building control applications.
- We build it. Work follows an agreed programme, with inspections at each stage and a final sign-off.
Your questions answered
How much does it cost to add a storey?
Around £2,200 to £3,800 per square metre of new floor including VAT, or £45,000 to £85,000 for a chalet conversion with dormers.
How long does it take?
About 12 to 24 weeks on site.
Do you work in Gwynedd and Anglesey?
Yes. Gwynedd and Anglesey is within our coverage for bungalow and upward extensions, along with nearby Bangor and Holyhead.
Other towns nearby
- Bungalow and upward extensions in Bangor
- Bungalow and upward extensions in Holyhead
- Bungalow and upward extensions in Caernarfon
- Bungalow and upward extensions in Llangefni
- Bungalow and upward extensions in Pwllheli
Learn more about bungalow and upward extensions, or see every project we cover in Gwynedd and Anglesey.