Basement construction services
Four specialisms, one team. Whether you need a full dig-out or just a dry cellar, every stage is delivered by people who work below ground all year round.
Basement Excavation
Basement excavation and dig-outs in London — from single-room dig-downs to full double-storey basements under existing homes, delivered safely with full structural support.
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Underpinning & Structural Works
Traditional mass concrete and reinforced underpinning in London — for basement formation, subsidence repair and structural alterations, delivered to the engineer's design and sequence.
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Waterproofing & Tanking
Structural waterproofing for London basements — cavity drain membranes, sump and pump systems and cementitious tanking, installed by a certified Delta Membranes and Wykamol contractor.
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Basement Conversion & Fit-Out
Basement and cellar conversions in London — turning existing below-ground space into dry, warm, habitable rooms, from structural works and waterproofing through to full fit-out.
Learn morePlanning a basement project? Let's talk about it.
A free, no-obligation site visit and quote. We'll tell you honestly what's possible under your property — and what it will cost.