Basement swimming pools in South London.

Kensington · W8 · Kensington new-build housesCase study

An indoor pool under a South London house. The tank, plant and dig are designed as one.

What a South London pool has to allow for.

One storey: The tank fits inside it
Plant room: Planned with the excavation
Kensington: A pool we built two floors down

NU Projects is a design and build company in Fulham SW6, founded in 2010. We handle basement swimming pools in South London SW and SE, 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 pool is the heaviest thing a basement can hold. Its tank, filters and heat recovery all need space.

Lambeth allows one storey below ground. So the tank depth and the ceiling over the water share that single level.

Wider Wimbledon and Dulwich plots suit a pool better than a narrow terrace. The garden above must still be kept mostly as soil.

We built a pool two floors below the street in Kensington. The same engineers would design yours.

What Lambeth allows for a pool below ground.

Council: London Borough of Lambeth, under its Local Plan adopted in September 2021.
Policy Q27: One storey below ground, and none beneath an existing basement.
Assessment: A Stage 1 Basement Impact Assessment goes in with the application. A qualified professional prepares it.
Flooding: A positive pumped device protects the basement from sewer flooding.

Source: Lambeth Local Plan 2021, Policy Q27 Basement development. Read on 7 October 2026. Policies change, so we read them again for your address.