Covering Llangefni
Llangefni is about 8 miles north of Caernarfon. We also cover Bangor (8 miles to the east), Caernarfon and Holyhead.
Homes in Gwynedd and Anglesey
Housing in Wales ranges from terraced streets in the valleys and older industrial towns to stone-built homes in rural areas and modern estates around the cities.
What is included in a mansard loft conversion in Llangefni?
A mansard loft conversion replaces one or both slopes of a roof with a near-vertical wall, typically at 70 degrees, with small dormer windows set into it. It creates almost a full extra storey and is common on terraced houses in towns and cities, particularly in London.
- Planning and building regulations checks under Welsh rules
- Structural design and party wall process
- Slate cladding and lead-clad dormers
What will a mansard loft conversion cost?
Use these ranges to budget for mansard loft conversions; the survey turns them into a fixed price for the agreed specification.
| Mansard loft conversions | Guide price incl. VAT |
|---|---|
| Rear mansard | £65,000 to £85,000 |
| Front and rear (double) mansard | £80,000 to £110,000 |
Planning and building rules in Llangefni
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.
This needs full planning permission from your council in Wales.
What can change the price or programme?
- The roof is open for longer than with a dormer, so weather protection matters.
- Scaffolding and a temporary roof are usually needed.
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.
- Design and fixed price. You get drawings and a written price for the agreed specification before anything is ordered.
- We build it. Work follows an agreed programme, with inspections at each stage and a final sign-off.
What people ask before starting
How long does a mansard take?
Around 10 to 14 weeks on site after planning approval.
Will I need party wall agreements?
Very likely, as the work affects the walls shared with both neighbours on a terrace.
Do you work in Llangefni?
Yes. Llangefni is within our coverage for mansard loft conversions, along with nearby Bangor and Caernarfon.
Mansard loft conversions near Llangefni
- Mansard loft conversions in Bangor
- Mansard loft conversions in Caernarfon
- Mansard loft conversions in Holyhead
- Mansard loft conversions in Colwyn Bay
Learn more about mansard loft conversions, or see every project we cover in Llangefni.