Mansard loft conversions in Fulham

Covering Fulham

We work in Fulham (SW6) and the places around it, including Chelsea, Putney and Battersea.

Homes in London

Much of London’s housing is Victorian and Edwardian terraces, which is why side return extensions, rear dormers and mansards are so common. Many streets are in conservation areas, and several boroughs use Article 4 directions that remove some permitted development rights.

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.

Structural design and party wall process
Roof removal and new mansard frame
Slate cladding and lead-clad dormers

What will a mansard loft conversion cost?

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

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 Fulham?

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. Many councils publish guidance on mansard design.

What can change the price or programme?

A mansard nearly always involves party walls on both sides of a terrace.
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.
We visit and measure. A surveyor checks the house, the boundaries and the ground, and discusses what is realistic.
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.

Your questions answered

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.

Who deals with the council for a project in Fulham?

We do. We prepare the drawings, submit planning or permitted development paperwork if needed, and arrange building control inspections.

Mansard loft conversions near Fulham

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