Basement construction in Weybridge.
Chelsea · SW3 · Chelsea basement and extensionCompleted work, photograph
New basements under Weybridge houses, judged as extensions because Elmbridge has no basement policy. One team designs, prices and builds.
What a Weybridge basement can be.
- No basement SPD
- Elmbridge sets no depth or garden limit
- DM18, 2015
- Green Belt basements must stay wholly underground
- KT13
- Wide plots, river valleys and one hill estate
NU Projects is a design and build company in Fulham SW6, founded in 2010. We handle basement conversion and construction in Weybridge KT13, 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.
Weybridge is large family houses on wide plots, beside the Wey and the Thames. A private hill estate stands apart on high ground. Plots like these often allow a basement inside the existing footprint.
This is the big difference from London. Elmbridge has no basement policy, no basement SPD and no impact assessment. There is no depth limit and no garden limit. Outside the Green Belt, a basement is judged as an extension.
So the limits are practical ones. Neighbours, trees and drainage decide the design. Where groundwater is a risk, the council asks for a hydrology report. We start with the ground investigation, then fix the depth.
Our built work is in London. In Chelsea we built a new basement and kitchen extension under one contract. One team runs structure, design and fit out, and prices it all.
What the council allows in Weybridge.
- Council
- Elmbridge Borough Council. Weybridge sits wholly inside it.
- Basement policy
- Elmbridge has no basement policy, no basement SPD and no impact assessment.
- Green Belt
- DM18, April 2015, allows basements wholly underground and inside the footprint.
- Estates
- The private hill estate needs its residents’ association’s written consent before any works.
- Conservation
- Town Centre (1977), Monument Green (1990) and Templemere (2017) are conservation areas.
Source: Elmbridge Development Management Plan 2015, Policy DM18, and Flood Risk SPD 2016. Read on 12 October 2026. Policies change, so we read them again for your address.
Our basement work in London.
Chelsea·Townhouse
Chelsea basement and extension
A new basement and kitchen extension in Chelsea, built under one contract.
See the project
Fulham·Basements
Fulham basements
A tall basement sitting room in Fulham, under a rooflight.
See the projectCompleted work, photographs
What a basement costs in Weybridge.
£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.
Open the calculatorThe 2026 cost guideBasement costs in full
What Weybridge owners ask about basements.
In Weybridge
- Every service in Weybridge, Cobham and Oxshott
- Basement swimming pools in Weybridge
- Basement gyms in Weybridge
- Basement cinema rooms in Weybridge
- Basement golf simulator rooms in Weybridge
Basements nearby
- Basement construction across London
- Basement construction 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 Holland Park
- Basement construction in Hampstead
- Basement construction in Notting Hill
- Basement construction in Clapham
- Basement construction in Cobham
- Basement construction in Oxshott
- Wimbledon
- Richmond, Twickenham and East Sheen
Further reading, from the journal
Which council policy governs a basement in Weybridge?
Elmbridge has no basement policy and no basement SPD.
Outside the Green Belt, a basement is judged as an extension.
Design, neighbours, trees and drainage decide it.
Can a Weybridge basement go under the whole garden?
Elmbridge sets no garden limit for basements.
Trees, drainage and neighbours still shape the footprint.
In the Green Belt, it must stay inside the existing footprint.
Does a Weybridge basement need a hydrology report?
Where groundwater is a risk, the council requires one.
The Wey and the Thames drive flood risk in the lower town.
In Flood Zone 3b, no basement is permitted.
Does a basement on a private Weybridge estate need estate consent?
Yes. The residents’ association must consent in writing before works start.
Its guidelines set limits on basements and lightwells.
We read the current version for each site.
What does a Weybridge basement cost?
Our basement band is £450 to £780 a sq ft, construction only.
A new dig is £500k to £900k+ as a project total.
Converting an existing basement is £180k to £300k as a project total.
Tell us about your home in Weybridge.
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