Indoor swimming pool two floors below the street, lit along both walls.

Basement swimming pools in West London.

Kensington · W8 · Kensington new-build housesCase study

Pools below West London houses, from the dig to the plant room.

Talk to NickHe calls you back within the hour, in working hours

Or call 020 7731 6841We use your details only to reach you. Privacy note

A pool under a West London house, planned from the plant room out.

Extra depth
The 2016 SPD allows a little for a pool
Plant room
Filtration, heating and air handling
Two floors down
Our Kensington pool, below the street

NU Projects is a design and build company in Fulham SW6, founded in 2010. We handle basement swimming pools in West London W/SW, under one contract. A new basement dig typically runs £500k to £900k. Converting an existing basement runs £180k to £300k. Call 020 7731 6841, and a budget estimate typically follows within seven days.

A basement pool is a concrete tank inside a waterproof box. One keeps water in, the other keeps ground water out.

In Kensington and Chelsea, a pool may earn a little extra depth. The basement is still one storey, under half the garden.

The pool hall needs its own air handling. Without it, moisture reaches the rest of the house.

We built a pool two floors below the street in Kensington. The same houses have a steam room on their leisure floor.

What the borough allows for a West London pool.

Council
Kensington and Chelsea governs Chelsea, Kensington and Notting Hill, through its 2024 Local Plan. Fulham sits with Hammersmith and Fulham.
Policy CD11
Adopted as CL7 in January 2015, kept in the 2024 Local Plan. One storey, under half the garden.
Basements SPD
Adopted April 2016. The storey cannot be split in two later. A pool may earn a little extra depth.
Plant
A plant room holds filtration, heating and air handling for the pool.
Dehumidification
The pool hall needs its own air handling to control moisture.
Height
A pool hall wants height, so the floor level is set early.

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.

What a basement pool costs in West London.

£180k to £300kConverting an existing basement. A project total, from our 2026 cost guide.

£500k to £900k+Digging a new basement. A project total, from our 2026 cost guide.

The cost guide figures are project totals for a West London basement.

A pool adds depth, plant and waterproofing, so it adds cost.

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

Open the calculatorThe 2026 cost guideCan I build it here?

Can I build a basement pool in West London?

Often, within the one storey rule.

Kensington and Chelsea allows a little extra depth for a pool.

Why does a basement pool need a plant room?

It holds the filtration, heating and air handling.

We size it early, so it fits inside the storey.

How do you stop damp from a basement pool?

The pool hall gets its own air handling.

It controls moisture before it reaches the house.

Have you built a basement pool in West London?

Yes, two floors below the street in Kensington W8.

We designed and built the houses around it.

Tell us about your home in West London.

Your name and one way to reply are enough. It goes straight to the studio.

A phone number or an email is enough. We only need one.

Where did you find us? Optional
Optional, it helps us prepare
What is the work?