Basements · Engineered and monitored
Basements in London.
New basements and conversions in prime London, engineered, monitored and built by one team.
01What it covers
Basements, explained.
NU Projects has built London basements since 2010. Work runs by underpinning or by piling, chosen for the property. Movement risk is managed by engineering, temporary works and monitoring.
Basements become bedrooms, utility rooms, cinemas, wine cellars, pools, gyms and saunas. Some become self-contained flats. Waterproofing and drainage are designed together, from the start.
Each London borough sets its own conditions for a new basement. Traffic and site management plans, soil testing and structural calculations are often needed. Flood risk and eco-home assessments follow where they are asked for.
- Underpinning or piling, chosen for the property
- Movement managed by engineering and monitoring
- Waterproofing and drainage designed in together
- Borough conditions, plans and assessments handled
- Bedrooms, cinemas, wine cellars, pools, gyms and saunas
- A basement built to feel like any other floor
Applies most inChelsea, Kensington, Knightsbridge, Notting Hill and Holland Park
02Our own photograph
Seen on site.
04Part of one contract
Part of our basements service.
05 · Engineered and monitored
Basements
New basements and conversions, engineered and monitored from the start.
See the whole serviceQuestionsBasements, answered
What people ask about basements.
Is my property suitable for a basement?
Suitability depends on planning, ground and water conditions, existing foundations, neighbours, utilities and access. Feasibility work sets out the main constraints before we develop a detailed layout.
How is basement waterproofing designed?
It is a coordinated specialist design for the intended use and ground conditions. The construction method is designed in alongside it.
Structure, joints, penetrations, drainage and maintenance access all need to work together.
Can a basement include a cinema, gym or wine room?
Each use needs its own structural, acoustic, ventilation and environmental requirements. A wine room and a gym should not share assumptions about temperature or humidity.
What belongs in a basement shell package and what is fit-out?
We define the boundary explicitly for every package. Structure, waterproofing, drainage, slab, stairs, services and finishes can be allocated differently.
A shell price should never be compared with a fully finished living floor.
What ongoing maintenance does a basement need?
We follow the actual waterproofing, drainage, pump and ventilation maintenance schedules.
Keep inspection access clear and keep service records. Warranty terms can depend on this maintenance being kept up.
Does the Royal Borough of Kensington and Chelsea limit new basements?
Its policy, CL7, was adopted in January 2015.
It allows one storey, and no more than half the garden.
We check it against your property before design starts.
Next step
See a range in a minute. Then send us the address for a proper number.
From the journal402 notes, free to read
Basements, written up.
-
3 min read
Basement waterproofing and pumps in London
What keeps a London basement dry. Waterproofing as one coordinated design, when pumps are needed, alarms, servicing and costs.
-
5 min read
The real cost of a London basement: what homeowners need to know before starting
What a London basement actually costs in 2026. Shell against fit out, what sits outside the build rate, fees, contingency and the hidden risks.
-
3 min read
Basement extensions in London: what homeowners need to know before they dig
Everything London homeowners need to know about basement extensions. Planning, costs, party walls, and construction advice from NU Projects.
Basements
Tell us about your home.
Send your name, the area and one way to reply.