Basement contractors in North London.
Fulham · SW6 · Fulham basementsCase study
New basements and cellar conversions on the North London hills. The ground is studied first, then the room is drawn.
Digging below a hill in North London.
- Policy A5
- One storey, never under an existing basement
- Burland 1
- The most damage a neighbour may suffer
- 7 days
- A budget estimate, typically
NU Projects is a design and build company in Fulham SW6, founded in 2010. We handle basement conversion and construction in North London NW and N. 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.
Hampstead sits on a hill, with springs and clay beneath it. The slope changes how water moves under a house. So a North London basement begins with boreholes, not a floor plan.
Since June 2017, every Camden basement needs planning permission. The application carries an impact assessment. Camden has it audited independently, and the applicant pays.
We commission the ground studies before design is fixed. The engineer sets the wall type and the waterproofing. Monitoring of the neighbours is priced in from day one.
St John’s Wood falls under Westminster, with its own basement policy. We confirm the council for every address before we draw.
What Camden asks of a North London basement.
- Council
- London Borough of Camden, under its Local Plan adopted in July 2017.
- One storey
- Policy A5. One storey only, and never under an existing basement.
- The garden
- No more than half of each garden. Less than 1.5 times the house’s footprint.
- Impact
- A Basement Impact Assessment, independently audited. Neighbour damage is capped at Burland category 1.
- Hampstead plan
- The 2025 Hampstead Neighbourhood Plan adds groundwater and tree tests.
- St John’s Wood
- It sits in Westminster, not Camden. We confirm the council first.
Source: Camden Local Plan 2017, Camden’s Basements guidance 2021, and the Hampstead plan 2025. Read on 5 October 2026. Policies change, so we read them again for your address.
Our basement crew, and our North London house.
Fulham·Basements
Fulham basements
Basements dug, waterproofed and finished by our own team in Fulham SW6. Not North London, but the same crew.
See the project
North London·House
North London house, reconfigured and fitted out
A 3,500 sq ft house in North London N2, reconfigured by NU.
See the projectCase study
What a basement costs in North London.
£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.
Hillside ground in North London often adds engineering and monitoring time.
The guide figures are project totals.
Fees, the audit, party wall costs, contingency and VAT sit outside both.
Open the calculatorThe 2026 cost guideBasement costs in fullCan I build it here?
What North London owners ask about basements.
In North London
- Every service in Hampstead and St John’s Wood
- Design and build in North London
- Party wall surveying in North London
- Planning consultants in North London
- MEP services in North London
Basements nearby
- Basement construction across London
- Basement case studies in London
- Basement conversion in Fulham
- Basement construction in Chelsea
- Basement construction in Kensington
- Basement construction in St John’s Wood
- Basement construction in South Kensington
- Basement construction in Knightsbridge
- Basement construction in Belgravia
- Basement construction in Mayfair
- Basement construction in Marylebone
- Basement construction in Holland Park
- Basement construction in Hampstead
- Basement construction in Notting Hill
- Basement construction in Clapham
- Basement construction in Weybridge
- Basement construction in Cobham
- Basement construction in Oxshott
- Basement construction in Highgate
- Basement construction in Primrose Hill
- Basement construction in Earl’s Court
- Basement construction in Pimlico
- Basement construction in Westminster
- Basement construction in West London
- Basement construction in South West London
- Basement construction in South London
- Hampstead and St John’s Wood
- Islington, Highgate and Primrose Hill
- Camden
- Marylebone, Bayswater and Maida Vale
Further reading, from the blog
Why does a North London basement need so much ground investigation?
The hills carry springs and clay.
Water and movement must be understood before any wall is designed.
Who pays for Camden’s basement audit?
The applicant does.
Camden commissions the independent audit of the impact assessment.
Can I add a basement beneath my existing cellar in North London?
Not in Camden. Policy A5 rules out a storey beneath an existing basement.
Lowering and converting the cellar is often the better route.
Is a St John’s Wood basement judged the same way?
No. St John’s Wood is in Westminster, under its City Plan.
We check the council before any design work starts.
See it builtNear North London
See it built.
Finished homes, designed, priced and built by NU.
Kensington · W8 New build
Kensington new-build houses
Two new-build houses with triple basements, built under one contract.
Case study
Chelsea · SW3 Townhouse
Chelsea townhouse, opened up and fitted out
A 4,300 sq ft townhouse with a new basement under its whole footprint.
Case study
Chelsea · SW3 Townhouse
Chelsea basement and extension
A new basement, a kitchen extension and a full interior renovation.
Case study
Tell us about your home in North London.
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