Bedroom with oak floors, a dressing table and French windows.

Loft conversions in Kensington.

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

Roof rooms for Kensington’s tall stucco houses. We study the street side and the garden side first.

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A Kensington roof, seen from two sides.

CD12
Roof policy in the 2024 Local Plan
Garden side
Shared garden elevations count like fronts
W8 · W14
Stucco terraces around communal gardens

NU Projects is a design and build company in Fulham SW6, founded in 2010. We handle loft conversions, dormers and mansards in Kensington W8, 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.

Many Kensington terraces back onto a communal garden. Dozens of households look up at those rear roofs.

The borough treats such elevations much like a front. A dormer hidden from the road still faces the lawn.

Policy CD12 asks any roof work to suit the house and its whole group. Where nobody has built up, an added floor meets resistance.

Plenty of these houses were later split into flats. An upper flat carries no permitted development rights, so planning comes first.

Our own Kensington work sits in W8. We built new houses there, from the lowest level to the bedrooms.

What the borough allows on a Kensington roof.

Council
Royal Borough of Kensington and Chelsea, which covers all of Kensington.
Group character
Policy CD12. A roof change must sit well with its neighbours, not only its own house.
Intact terraces
No extra storey where the group roofline is unaltered.
Broken terraces
Where several houses already rose, filling the gaps can be accepted.
Conservation areas
Most of Kensington is covered. Class B roof rights do not reach these streets.
Upper flats
A flat has no householder permitted development rights. The freeholder must also agree.

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.

Built here, in Kensington W8.

A small digger at the bottom of the excavation, seen from above. Piles and steel surround it.

Kensington·New build

Kensington new-build houses

New houses in Kensington W8, built by one team from the dig upwards.

See the project

Completed work, photographs

What a loft conversion costs in Kensington.

£140k to £220kA mansard loft. A project total, from our 2026 cost guide.

£90k to £140kA dormer loft. A project total, from our 2026 cost guide.

A mansard here depends on neighbours who have already built up.

The guide figures are project totals.

Fees, party wall costs, contingency and VAT sit outside both.

Open the calculatorThe 2026 cost guideCan I build it here?

Will a rear dormer facing a Kensington communal garden be judged like a front?

Usually, yes. The borough reads communal garden elevations much as street fronts.

Many neighbours see that roof every day.

Flush rooflights often sit more quietly than a dormer.

Can the top floor flat of a Kensington house take over the loft?

Sometimes. The roof space is often the freeholder’s, so their consent comes first.

Planning is then needed, because flats lack permitted development rights.

We read the lease before drawing anything.

How do I know if my Kensington terrace roofline is still intact?

Walk the street and the garden side, counting any added storeys.

If none exist, Policy CD12 will resist the first one.

Where several exist, infill becomes a fair argument.

Do Kensington roof works ever avoid a planning application?

Rarely. Most of Kensington sits in conservation areas.

Class B roof rights do not apply inside them.

We confirm the status of your address before design.

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