Services
Basement Conversions in Harefield, Kensington & Prime London
New living space below the footprint of your home — excavated, waterproofed and finished to a luxury standard.
New living space below the footprint of your home — excavated, waterproofed and finished to a luxury standard.
A basement is the most technically demanding way to add space — and the most rewarding when it's done properly. We lead with structural engineering, waterproofing and party-wall discipline, then finish the space as a genuine part of the home.
Lowering and underpinning to create full-height space safely.
New basements beneath the house or garden, with lightwells.
Multi-layer waterproofing designed for long-term dry space.
High-spec leisure spaces built into the new floor.
Engineering, surveys and neighbour agreements managed for you.
Experience with RBKC and prime-central consent requirements.
A few of the areas we cover for basement conversions — see all 36 on our areas page.
We visit your home, understand your brief and take the measurements that make a quote meaningful.
Drawings, structural engineering and planning or building-regs applications, handled for you.
One project-managed team on site — tidy, communicative and accountable from strip-out to snagging.
A clean finish, your completion pack, and a workmanship guarantee that stands behind the work.
Basements are the highest-ticket work we do — cost depends on depth, ground conditions and finish. We quote in writing after structural and ground assessment, with no surprises.
Often yes, particularly in prime boroughs and conservation areas, alongside building regs and a party-wall process. We manage all of it as part of the project.
Most basement projects run several months to a year given the excavation, structural and waterproofing stages. We programme each phase and keep you informed.
Most homes can take a basement, but ground conditions, the water table and neighbouring structures all matter. A ground and structural survey tells us for certain.
Underpinning extends and strengthens existing foundations so the house sits safely above the new space. Whether it's needed depends on depth and existing footings — the engineer specifies it.
Tell us about your project and we'll arrange a survey and a clear, written quote.
