Loft conversions in South Kensington.

Kensington · W8 · Kensington new-build housesCompleted work, photograph

Most of SW7 is flats. A loft here starts with who owns the roof.

Above a South Kensington flat, the lease comes first.

Freeholder: Usually owns the space above a flat
Mews: The likelier house for a new roof room
SW7: Stucco terraces of four or five storeys

NU Projects is a design and build company in Fulham SW6, founded in 2010. We handle loft conversions, dormers and mansards in South Kensington SW7, under one contract. A main dormer loft typically runs £90k to £140k. A mansard loft runs £140k to £220k. Call 020 7731 6841, and a budget estimate typically follows within seven days.

South Kensington is mostly flats, stacked in stucco terraces four or five storeys tall.

The void above the top flat rarely belongs to its owner. It normally stays with the freeholder.

So the first conversation is about buying or licensing that space. The council comes second.

Behind the grand terraces run the mews. A mews house roof is often where a new bedroom fits.

Even there, Policy CD12 judges the row as one. A single raised roof can look out of place.

What the borough allows above South Kensington homes.

Council: Royal Borough of Kensington and Chelsea, under its Local Plan of July 2024.
Flats: No householder permitted development rights. Every external roof change needs planning.
Existing extra floors: A row that already gained a storey is resisted for another.
Eaves roofs: Pitched roofs with eaves are named unsuitable for an added storey.
Conservation: Most of South Kensington is conservation area, where windows and roofs face close review.

Source: Kensington and Chelsea’s Local Plan 2024, Policies CD12 and CD13. Read on 6 October 2026. Policies change, so we read them again for your address.