Honest, feasibility-led advice on multi-level basements in Holland Park — where RBKC policy generally limits new basements to a single storey, we tell you what is realistically achievable.
Speak to the studio directly: 020 8054 8756
Multi-level or multi-storey basements are heavily restricted in the Royal Borough. RBKC’s basement policy generally limits a new basement to a single storey under the house and part of the garden, so a true multi-level scheme is uncommon and only ever considered in limited, site-specific circumstances. We start by being honest about that.
Where greater depth is sometimes possible, it is usually because a lower level already exists, or the site has unusual characteristics that the policy and a Basement Impact Assessment can support. It is never a given, and proposing a non-compliant deep basement simply wastes time and money on a refusal.
If you are weighing up below-ground options, we assess your specific site against current RBKC policy, set out realistically what can be built, and design a compliant single-storey basement — or advise where depth genuinely is achievable — with engineering, waterproofing and the planning case in one contract.
The honest starting point: RBKC normally limits new basements to one storey.
RBKC policy generally restricts new basements to a single storey, so multi-level schemes are rare.
Greater depth is occasionally possible where a lower level exists or the site genuinely supports it under policy.
A Basement Impact Assessment on structure and groundwater governs what depth, if any, can be justified.
We will not design a deep basement that policy refuses — we tell you what is realistic before you spend.
From a frank policy review to a compliant, buildable scheme — not a refusal.
A frank assessment of your site against RBKC’s basement policy and depth limits.
Commissioning the Basement Impact Assessment to test what is structurally and legally possible.
Designing a compliant single-storey basement, or advising where extra depth is genuinely achievable.
Engineer-designed underpinning and retaining structure for the agreed depth.
Notices, schedules of condition and awards with neighbours.
Maintainable tanked or cavity-drain systems designed for the depth.
Lightwells and mechanical ventilation to make below-ground rooms usable.
Finishing the agreed scheme, snagging and handover.
We give honest, policy-led basement advice across Holland Park, designing compliant schemes rather than chasing refusals.
Holland Park sits within the Royal Borough of Kensington & Chelsea — see our Holland Park area page and South West London refurbishment overview.
Book a no-obligation consultation at 2 Eaton Gate in SW1, at our Hampstead studio, or at your property. We will give you an honest read on approvals, programme and budget band — in pounds sterling — before you commit.
Site visit · approvals read · outline budget band (GBP) · programme indication. No obligation.
Send Project DetailsThe same NW3 design-build team covers the neighbouring areas: