Mansard loft conversions in Somerset

Covering Somerset

Our coverage across Somerset includes Bath, Weston-super-Mare, Taunton and Yeovil.

Homes in the South West

The South West mixes stone and render cottages, Victorian terraces in the larger towns and modern estates, and many historic centres are conservation areas where materials and roof shapes are closely controlled.

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 application to local design guidance
Roof removal and new mansard frame
En-suite, electrics and fire safety

What will a mansard loft conversion cost?

What mansard loft conversions typically cost. These are guide ranges; the written quote for your house replaces them.

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 Somerset

Projects in England go through two separate checks. Planning (or confirmation that the work is permitted development) comes from the district, borough or unitary council, and building regulations approval comes from the council’s building control team or a registered building control approver. Where work touches a shared wall or digs near a neighbour’s foundations, the Party Wall etc. Act 1996 applies.

Mansard conversions change the shape of the roof significantly, so they usually need planning permission in England.

What can affect a mansard loft conversion?

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?

Start with a conversation. A short call or the online form is enough for us to understand what you want to build.
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.
Build and hand over. Our teams build to the programme, building control inspects, and you get the completion paperwork at the end.

Mansard loft conversions: common questions

Does a mansard need planning permission?

Almost always, because it changes the roof profile.

Will I need party wall agreements?

Very likely, as the work affects the walls shared with both neighbours on a terrace.

How do I get a price for mansard loft conversions in Somerset?

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 near Somerset

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