Loft conversions in Gwynedd and Anglesey

Covering Gwynedd and Anglesey

Our loft conversions service in Gwynedd and Anglesey covers Bangor, Holyhead, Caernarfon and Llangefni and more.

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 is a loft conversion?

We start with the head height. You need roughly 2.2 m or more from the top of the ceiling joists to the underside of the ridge for a conversion to work without raising the roof. From there we design the staircase position, the type of conversion and the en-suite, and manage the whole build including fire safety and building control.

Planning and building regulations checks under Welsh rules
New floor joists, steels and staircase
Dormer or rooflights, insulation and plasterboard

How much should I budget for a loft conversion?

Typical ranges for loft conversions. Ground conditions, access and specification move the final figure, which we fix in writing before work starts.

Loft conversions	Guide price incl. VAT
Rooflight conversion	£30,000 to £45,000
Dormer conversion	£50,000 to £90,000
Hip-to-gable with dormer	£60,000 to £95,000
Mansard conversion	£65,000 to £110,000

How is a loft conversion approved 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.

Wales has its own loft and roof permitted development rules. Rear dormers within set volume limits are often allowed, but the detail differs from England's, so we confirm the current Welsh limits against your roof before the design is fixed.

What should I think about before starting?

Head height under the ridge decides whether a conversion is practical.
Fire safety rules can mean new fire doors on the floors below.

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.
Survey at your house. We look at the existing structure, services and access, and agree what the design needs to achieve.
Design and fixed price. You get drawings and a written price for the agreed specification before anything is ordered.
Build and hand over. Our teams build to the programme, building control inspects, and you get the completion paperwork at the end.

What people ask before starting

How much does a loft conversion cost?

Roughly £30,000 to £45,000 for a rooflight conversion, £50,000 to £90,000 for a dormer, £60,000 to £95,000 for a hip-to-gable and £65,000 to £110,000 for a mansard, including VAT.

How long does a loft conversion take?

Usually 6 to 14 weeks on site depending on the type.

Do you work in Gwynedd and Anglesey?

Yes. Gwynedd and Anglesey is within our coverage for loft conversions, along with nearby Bangor and Holyhead.

Loft conversions near Gwynedd and Anglesey

Learn more about loft conversions, or see every project we cover in Gwynedd and Anglesey.