Basement cinema rooms in Westminster.
Chelsea · SW3 · Chelsea terraced houseCompleted work, photograph
A Westminster cinema is usually a sealed room in an apartment. Under a whole house, it can sit below.
A Westminster cinema, for a flat or a house.
- Sealed room
- Quiet for the flats around it
- Listed
- The hierarchy of spaces kept
- SW1P · SW1H
- Mansion blocks and Georgian terraces
NU Projects is a design and build company in Fulham SW6, founded in 2010. We handle basement cinema rooms in Westminster SW1P, 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.
In a mansion block, a cinema is a room within the flat. It is built as a box on resilient mounts. Low notes are the hard part, so the bass is tuned with it.
The projector and rack sit in a cooled cupboard, reached from outside the room. Air comes in slowly through lined ducts. Lights dim in steps, set from one panel.
Under a whole house, the cinema can go below. Policy 50 allows one storey under the lowest original floor. Near the river, flood zones 2 and 3 need a site specific assessment.
In Chelsea we panelled a media room in deep green. In SW1 we fitted an apartment with interiors and joinery. One team designs, prices and builds the cinema.
What the council allows in Westminster.
- Council
- City of Westminster, with over 11,000 listed buildings across the city.
- Depth
- Policy 50 permits one storey under the lowest original floor.
- Listed houses
- The original hierarchy of spaces must not be unbalanced.
- Flood risk
- Flood zones 2 and 3 need a site specific flood risk assessment.
- Flats
- Flats and maisonettes have no householder permitted development rights.
Source: Westminster’s City Plan, January 2026 edition, Policy 50. Read on 16 October 2026. Policies change, so we read them again for your address.
A media room we built, and an apartment in SW1.
Chelsea·Terraced house
Chelsea terraced house
In Chelsea SW3: a media room panelled in deep green, built by NU.
See the project
Central London·Apartment
Central London apartment, interiors and joinery
Nearby in SW1: an apartment with joinery by NU.
See the projectCompleted work, photographs
What a basement cinema costs in Westminster.
£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.
A cinema below a whole house sits at the new dig figure.
Both guide figures are project totals. Fees, contingency and VAT are extra.
What Westminster owners ask about cinemas.
In Westminster
- Every service in Pimlico and Westminster
- Basement construction in Westminster
- Basement golf simulator rooms in Westminster
- Basement gyms in Westminster
- Design and build in Westminster
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 Knightsbridge
- 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
- Basement cinema rooms in Weybridge
- Basement cinema rooms in Cobham
- Basement cinema rooms in Oxshott
- Basement cinema rooms in Marylebone
- Basement cinema rooms in Highgate
- Basement cinema rooms in Primrose Hill
- Basement cinema rooms in Earl’s Court
- Basement cinema rooms in Pimlico
- Belgravia
- Mayfair
- Knightsbridge
Further reading, from the blog
Can a Westminster mansion block flat have a cinema room?
Yes, as a sealed room within the flat.
It sits on resilient mounts, so the block stays quiet.
Where does the equipment go in a Westminster cinema?
In a cooled cupboard reached from outside the room.
Its fans then stay out of the film.
Can a cinema go below a listed Westminster house?
Sometimes, with listed building consent and planning.
The hierarchy of spaces above must stay balanced.
Is flood risk checked for a Westminster basement cinema?
Yes, near the river it comes first.
It shapes the waterproofing, drainage and pumps.
Tell us about your home in Westminster.
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