Basement cinema rooms in Knightsbridge.
Chelsea · SW3 · Chelsea townhouse, full refurbishmentCompleted work, photograph
In Knightsbridge a cinema often sits beside a pool or a wine room. Each room needs its own air.
A Knightsbridge cinema, beside the pool.
- Two councils
- Kensington and Chelsea meets Westminster here.
- Damp kept out
- A cinema never shares air with a pool.
- One contract
- NU builds the whole lower floor.
NU Projects is a design and build company in Fulham SW6, founded in 2010. We handle basement cinema rooms in Knightsbridge SW1X, 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.
Knightsbridge is mansion blocks, mews houses and white townhouses. Some are flats with a shared lower floor. A private cinema is often the second leisure room. It sits beside a pool or wine room.
Two councils meet here. Kensington and Chelsea holds a dig to one storey. Westminster allows one storey below the lowest original floor. Which side of the line you sit decides the plan.
Next to a pool, damp air is the enemy of a cinema. It harms screens, fabric and electronics. So the cinema gets its own air supply and a tight door. Plant for each room is kept apart.
We built a Knightsbridge townhouse with a marble pool and a wine room. A cinema asks for the same planning of plant, ducts and structure. In Chelsea nearby, we fitted a townhouse cinema with copper shelving.
What the council allows in Knightsbridge.
- Council
- Kensington and Chelsea to the west and south. Westminster to the east and the park side.
- Kensington and Chelsea
- Policy CD11 of the 2024 Local Plan. One storey, under no more than half the garden.
- Westminster
- City Plan Policy 50. One storey below the lowest original floor, under half the garden.
- Small gardens
- Where a garden is 8m or less, a basement may extend 4m.
Source: Kensington and Chelsea’s Local Plan 2024 Policy CD11, and Westminster’s City Plan Policy 50. Read on 3 October 2026. Policies change, so we read them again for your address.
Below ground, close by.
Chelsea·Townhouse
Chelsea townhouse, full refurbishment
A cinema room with a deep corner sofa and copper shelving, in Chelsea.
See the project
Knightsbridge·Townhouse
Knightsbridge townhouse, pool and wine room
A Knightsbridge townhouse with a marble pool and a wine room, built by NU.
See the projectCompleted work, photographs
What a basement cinema costs in Knightsbridge.
£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 Knightsbridge owners ask about cinemas.
In Knightsbridge
- Every service in Knightsbridge
- Luxury refurbishment in Knightsbridge
- Basement construction in Knightsbridge
- Interior design in Knightsbridge
- Party wall surveying in Knightsbridge
- Basement swimming pools in Knightsbridge
- Basement gyms in Knightsbridge
- Basement golf simulator rooms in Knightsbridge
Cinemas nearby
- Basement cinema rooms across London
- Basement cinema rooms in Chelsea
- Basement cinema rooms in Kensington
- Basement cinema rooms in South Kensington
- Basement cinema rooms in Holland Park
- Basement cinema rooms in Notting Hill
- Basement cinema rooms in Belgravia
- Basement cinema rooms in Mayfair
- Basement cinema rooms in St John’s Wood
- Basement cinema rooms in Hampstead
- Basement cinema rooms in Fulham
- Belgravia
- South Kensington
- Chelsea
- Mayfair
Further reading, from the journal
Can a Knightsbridge pool floor also hold a cinema?
Yes, with separate air supplies and a sealed lobby between them.
Damp must never reach the screen or the electronics.
Which council governs a Knightsbridge basement home cinema?
It depends on the address. Some sit in Kensington and Chelsea, others in Westminster.
We confirm the boundary before we design.
What is the cost of a Knightsbridge private cinema room?
Our basement band is £450 to £780 a sq ft, construction only.
A leisure floor with several rooms is priced as one.
Can a Knightsbridge mews house have a cinema room?
Often, though the neighbourhood rules vary by side of the boundary.
A mews floor is usually small, so planning is tight.
Does a Knightsbridge mansion flat cinema need the freeholder?
Usually, yes. Structural and sound work needs the landlord’s consent.
We prepare the drawings they ask for.
Tell us about your home in Knightsbridge.
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