Full-floor mansard conversions to South Hampstead villas — designed to match the established roofline of the street and win Camden consent, with structure and party wall in-house.
Speak to the studio directly: 020 8054 8756
A mansard rebuilds the roof as a steep, near-vertical front slope, giving the largest usable floor of any loft conversion. On South Hampstead streets where neighbouring villas already carry a mansard or where the roofscape can absorb one, a well-detailed mansard can be the natural way to add a full floor.
Where a street has a consistent, unbroken roofline, Camden will often resist a mansard that interrupts the rhythm the South Hampstead Conservation Area protects. The deciding factor is the conservation area and the existing roofscape, so we study the whole street — not just your house — before proposing anything.
When a mansard is the right answer, we design it to match the neighbouring profiles, slate or lead the front slope correctly, and engineer the structure, staircase and fire strategy in a single contract — with honest budgets in pounds sterling.
A mansard lives or dies on whether it matches the established roofline of the street.
Where the roofscape can absorb a mansard, it works; where the roofline is consistent, Camden usually resists breaking it.
The front slope must sit at the right pitch, slated or leaded to read as part of the original roof.
A mansard needs a Camden planning application and a heritage case showing it preserves the roofscape.
A mansard carries a full room, so it needs proper support, a compliant stair and a fire strategy — all in-house.
From a roofline study to a finished top floor — designed to match the street.
Surveying the street and roofscape to confirm a matching mansard is achievable.
Drawings and a heritage statement for a mansard that respects the roofscape.
Steel, ridge and floor structure for a full top floor, with Building Control.
Steep front framing, slate or lead, dormer windows and insulation.
A new compliant staircase integrated into the floor below.
Protected escape, fire separation and Building Regulations sign-off.
Notices and awards for the shared roof and walls.
Bedroom suite or studio fit-out, two-stage snagging and handover.
We design and build mansard conversions where the street and conservation area support a matching roofline, across South Hampstead.
South Hampstead sits within the London Borough of Camden — see our South Hampstead area page and North London refurbishment overview.
Book a no-obligation consultation at our North London studio on Finchley Road, in Hampstead, or at your property. We will give you an honest read on approvals, programme and budget band — in pounds sterling — before you commit.
Site visit · approvals read · outline budget band (GBP) · programme indication. No obligation.
Send Project DetailsThe same NW3 design-build team covers the neighbouring areas: