Basement swimming pools in Hampstead.
Knightsbridge · SW1 · Knightsbridge townhouse, pool and wine roomCompleted work, photograph
Hampstead sits on a hill with groundwater and old trees. A pool here begins with a Basement Impact Assessment.
What a Hampstead pool has to prove.
- NW3
- Villas climbing a hill, in the London Borough of Camden.
- Policy A5
- One storey only, and never under an existing basement.
- July 2025
- The Hampstead Neighbourhood Plan was adopted.
NU Projects is a design and build company in Fulham SW6, founded in 2010. We handle basement swimming pools in Hampstead NW3, 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.
Houses in NW3 climb a hill, in steep gardens behind Victorian and Edwardian villas. On a slope, floors step down toward the garden. A pool hall can follow that fall. It can open to the garden at its lowest end.
Camden Policy A5 allows one storey, and never under an existing basement. A garden is limited to half. The Basement Impact Assessment is independently audited. Neighbour damage is capped at Burland category 1.
The Hampstead Neighbourhood Plan, adopted July 2025, adds tests on groundwater and trees. A tank is heavy when full, and buoyant when empty. On a slope, water moves downhill through the soil. We map that path before the pool is fixed.
Our Knightsbridge townhouse has a marble lined pool beneath a lit ceiling. Our Fulham basements show the dig and the waterproofing. We have not built a Hampstead pool yet. One team designs, prices and builds the whole job.
What the council allows in Hampstead.
- 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.
- Coming next
- Camden’s draft 2026 plan renames the policy D6. It keeps one storey and half the garden.
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.
Basements in Camden.
Knightsbridge·Townhouse
Knightsbridge townhouse, pool and wine room
A Knightsbridge townhouse with a marble lined pool, built by NU.
See the project
Fulham·Basements
Fulham basements
Basements dug, waterproofed and finished by our own team, under Fulham houses.
See the projectCompleted work, photographs
What a basement pool costs in Hampstead.
£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 Hampstead owners ask about pools.
In Hampstead
- Every service in Hampstead and St John’s Wood
- Basement construction in Hampstead
- Luxury refurbishment in Hampstead
- Basement gyms in Hampstead
- Basement cinema rooms in Hampstead
- Basement golf simulator rooms in Hampstead
Pools nearby
- Basement swimming pools across London
- Basement swimming pools in Chelsea
- Basement swimming pools in Kensington
- Basement swimming pools in South Kensington
- Basement swimming pools in Holland Park
- Basement swimming pools in Notting Hill
- Basement swimming pools in Knightsbridge
- Basement swimming pools in Belgravia
- Basement swimming pools in Mayfair
- Basement swimming pools in St John’s Wood
- Basement swimming pools in Fulham
- Islington, Highgate and Primrose Hill
- Marylebone, Bayswater and Maida Vale
- Kensington
Further reading, from the journal
What is a Basement Impact Assessment for a Hampstead pool?
It tests the effect of the dig on neighbours, water and trees.
Camden has it audited by an independent expert.
Can a Hampstead pool go under an existing basement?
No. Policy A5 never allows a new basement under an existing one.
A pool must take the place of the old floor, not sit beneath it.
How does a Hampstead hillside change a pool design?
Water moves through the soil on a slope. The tank must resist that flow.
A drained cavity takes the water round the pool, not into it.
Will Camden’s new plan change a Hampstead pool project?
The draft 2026 plan renames the policy D6. It keeps one storey and half the garden.
We design to the rules in force on the day of the application.
What does a Hampstead basement pool cost to build?
Our basement band is £450 to £780 a sq ft, construction only.
Tell us about your home in Hampstead.
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