Mansard loft conversions in Newport, Gwent

Covering Newport, Gwent

Our coverage around Newport, Gwent (NP10, NP18, NP19) also includes Cwmbran, Pontypool and Caerphilly.

Homes in Gwent

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 do you get with a mansard loft conversion?

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
Slate cladding and lead-clad dormers
Staircase, insulation and fit-out

How much does a mansard loft conversion cost in Newport, Gwent?

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

Mansard loft conversions	Guide price incl. VAT
Rear mansard	£65,000 to £85,000
Front and rear (double) mansard	£80,000 to £110,000

Do you need permission for a mansard loft conversion in Newport, Gwent?

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.

This needs full planning permission from your council in Wales. We prepare and submit the application and deal with the planning officer on your behalf.

What should Newport, Gwent homeowners check first?

A mansard nearly always involves party walls on both sides of a terrace.
The roof is open for longer than with a dormer, so weather protection matters.

How does the project run?

Start with a conversation. A short call or the online form is enough for us to understand what you want to build.
We visit and measure. A surveyor checks the house, the boundaries and the ground, and discusses what is realistic.
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.

Your questions answered

How much does a mansard loft conversion cost?

Typically £65,000 to £110,000 including VAT, depending on whether one or both roof slopes are rebuilt.

How long does a mansard take?

Around 10 to 14 weeks on site after planning approval.

How do I get a price for mansard loft conversions in Newport, Gwent?

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

Mansard loft conversions in nearby towns

Learn more about mansard loft conversions, or see every project we cover in Newport.