Basement gyms in South Kensington.
Kensington · W8 · Kensington new-build housesCompleted work, photograph
A gym on a lower leisure floor in South Kensington. Steam and a pool can sit beside it.
What a South Kensington gym has to solve.
- SW7
- Museum quarter streets and tall terraces
- A pool may earn depth
- The 2016 Basements SPD allows a little more
- Lower floor built
- A steam room in walnut joinery
NU Projects is a design and build company in Fulham SW6, founded in 2010. We handle basement gyms and spa rooms in South Kensington SW7, under one contract. A basement runs £450 to £780 a sq ft, construction only. Call 020 7731 6841, and a budget estimate typically follows within seven days.
South Kensington has tall white terraces, mews and the streets near the museums. The houses are narrow and deep. Their useful new space is the floor below. A lower leisure floor can hold a gym, a steam room and more.
Policy CD11 limits a new basement to one storey. The 2016 Basements SPD allows a little extra depth for a swimming pool. A gym alone does not earn it. So we plan the wet and dry rooms as one storey.
Steam and heavy weights do not mix. The gym takes the dry side and the steam room the wet. A tiled threshold and a separate extract keep damp out. Plant for both shares one room.
We built two houses nearby, with a pool two floors below the street. Their lower leisure floor has a steam room and walnut joinery. The same team designed, priced and built it all.
What the council allows in South Kensington.
- Council
- Royal Borough of Kensington and Chelsea. Gym, steam room and pool all fall under its plan.
- Depth
- CD11 gives one storey. Running machines and a sauna must share that single level.
- Pool allowance
- The SPD gives a pool a little extra depth. A gym on its own gets none.
- Site works
- A traffic plan and the construction code cover deliveries and spoil.
- Plant
- Gym cooling and steam share one plant room.
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.
Leisure floors in the borough.
Kensington·New build
Kensington new-build houses
The steam room below two houses we built nearby in Kensington.
See the project
Kensington·New build
Kensington new-build houses
The pool in the same two houses, two floors below the street.
See the projectCompleted work, photographs
What a basement gym costs in South Kensington.
£450 to £780a sq ft, construction only. Our basement band.
£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.
These are two kinds of figure. The band is a rate per square foot, construction only.
The cost guide figures are whole project totals.
Fees, party wall costs, contingency and VAT sit outside them.
What South Kensington owners ask about gyms.
In South Kensington
- Every service in South Kensington
- Interior design in South Kensington
- Basement construction in South Kensington
- Luxury refurbishment in South Kensington
- Basement swimming pools in South Kensington
- Basement cinema rooms in South Kensington
- Basement golf simulator rooms in South Kensington
Gyms nearby
- Basement gyms across London
- Basement gyms in Chelsea
- Basement gyms in Kensington
- Basement gyms in Holland Park
- Basement gyms in Notting Hill
- Basement gyms in Knightsbridge
- Basement gyms in Belgravia
- Basement gyms in Mayfair
- Basement gyms in St John’s Wood
- Basement gyms in Hampstead
- Basement gyms in Fulham
- Kensington
- Chelsea
- Knightsbridge
Further reading, from the journal
Can a South Kensington basement gym share plant with a pool?
Yes.
One plant room can serve gym cooling, a steam room and a pool.
It is sized at design stage, with room to service it.
Does a South Kensington basement gym get extra depth?
Not on its own.
The SPD allows extra depth for a swimming pool only.
A gym is planned inside the one storey.
Where does the steam room go beside a South Kensington basement gym?
Next to the gym, behind a sealed door.
Its walls are tiled and waterproofed.
Its extract runs apart from the gym’s air.
How do we get kit into a South Kensington basement gym?
Racks and machines come in before the final finishes.
We plan the route through the house and the lightwell.
Nothing is carried through finished rooms.
What does a basement gym in South Kensington cost?
Our basement band is £450 to £780 a sq ft, construction only.
We price the house itself.
Tell us about your home in South Kensington.
Your name and one way to reply are enough. It goes straight to the studio.
- Already have an architect or designer? We build to their design. Working with your designer
- An NDA on request, and your home is never published without your consent. How we work in confidence