Basement swimming pools in Marylebone.

NU Projects is a design and build company in Fulham SW6, founded in 2010. We handle basement swimming pools in Marylebone W1, 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.

Most Marylebone terraces sit above shops and are split into apartments. A pool cannot hang beneath one flat. It needs the freehold of a whole house or a mews. That narrows the field before any drawing starts.

Westminster’s Policy 50 permits a single storey under the lowest original floor. The pool tank must fit inside that storey, with its plant beside it. Gardens here are short. A garden of 8 metres or less allows a 4 metre reach.

The pool hall needs fresh air, and so does its plant room. In a terrace those ducts must surface somewhere discreet. We trace that route through the house before we size the tank. Sewer flooding is guarded against with a pumped device and sustainable drainage.

Our Marylebone work is a listed apartment, kept with its period fabric. Our nearest pool is in Knightsbridge, lined in marble. One team engineers, prices and builds the whole thing.