Kitchen in dark figured timber with a dark marble worktop.

House extensions in Holland Park.

Chelsea · SW3 · Chelsea basement and extensionCompleted work, photograph

Holland Park villas have the gardens Kensington mostly lacks. A garden level kitchen or family room is a real option here.

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A villa, its pair and the gap between.

Long gardens
Room for a generous kitchen
CD13
The rear line and eaves tests
£200k to £320k
A wraparound extension, cost guide total

NU Projects is a design and build company in Fulham SW6, founded in 2010. We handle house and kitchen extensions in Holland Park W11, under one contract. A rear kitchen extension typically runs £160k to £250k. A side return extension typically runs £140k to £220k. Call 020 7731 6841, and a budget estimate typically follows within seven days.

Many Holland Park villas stand in pairs, set back behind front gardens. Behind them, the gardens run long.

That depth lets a kitchen extension be generous without crowding the lawn. We still keep most of the garden green.

The side matters as much as the back. Filling the space beside a villa can upset the pair.

So we often design a rear room with a slim glazed link. The villa’s outline stays readable.

Rainwater from a new roof is planned at sketch stage. The area has its own critical drainage designation.

What the council allows in Holland Park.

Council
Royal Borough of Kensington and Chelsea, Local Plan of July 2024.
How deep
Policy CD13. No further than the general rear line of neighbouring extensions.
How high
Below the main eaves, and not above nearby additions.
Pairs
A pair must stay balanced, and important gaps stay open.
Conservatories
A roof level conservatory is resisted. At garden level, one can work.
Listed villas
Listed building consent sits beside planning, and reaches inside.

Source: Kensington and Chelsea’s Local Plan 2024, Policies CD4, CD5, CD11 and CD13. Read on 3 October 2026. Policies change, so we read them again for your address.

Built in the same borough.

Living room with tall steel windows and herringbone parquet.

Chelsea·Townhouse

Chelsea basement and extension

A kitchen extension and basement in Chelsea, in the same borough.

See the project
Living room with a glazed wall onto a planted light well.

Kensington·New build

Kensington new-build houses

Two new houses nearby in Kensington W8, built under one contract.

See the project

Completed work, photographs

What a house extension costs in Holland Park.

£200k to £320kA wraparound extension. A project total, from our 2026 cost guide.

£160k to £250kA rear kitchen extension. A project total, from our 2026 cost guide.

A listed villa adds consent time before any build starts.

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

Open the calculatorThe 2026 cost guideCan I build it here?

How deep can a kitchen extension behind a Holland Park villa go?

Usually to the general rear line of the neighbouring additions.

A long garden does not change that test.

We survey the neighbours’ extensions first.

Can a Holland Park villa have a glazed garden room?

Often at garden level, with frames that suit the villa.

A conservatory at roof level is resisted.

Will a side extension work on a semi-detached Holland Park villa?

It is harder than a rear one.

The borough wants a pair kept balanced, with important gaps open.

We test that early, before full drawings.

What does a garden extension in Holland Park cost?

Our 2026 cost guide puts a wraparound at £200k to £320k in total.

A rear kitchen extension runs £160k to £250k.

Tell us about your home in Holland Park.

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