Basement Conversion
– Expertly Built for West London Homes
We deliver expertly constructed basement conversions in Chelsea, Fulham, Kensington and beyond — managing every phase of the build with precision, safety and seamless coordination. Whether you’re working with an architect or coordinating the project yourself, we bring your plans to life with trusted craftsmanship and full technical execution.
High-End Basement Conversion Company
From structural excavation and underpinning to waterproofing, concrete slabs and fit-out — we build basements that are watertight, habitable and fully compliant with London’s building regulations. Whether you're digging out a cellar, expanding below ground, or constructing a new basement from scratch, our team delivers space that adds long-term value and real lifestyle potential — from wine cellars and home cinemas to guest suites and playrooms.
Basement Conversions, Seamlessly Delivered
We don’t design — we build. As a trusted basement conversion company in London, we provide one point of contact from quote to completion — ensuring your project is fully managed and executed with care, clarity and compliance at every stage.
We liaise seamlessly with your architect, engineer or interior designer on architect-led projects, or coordinate directly with you to deliver the work as planned. Our experienced team handles excavation, underpinning, reinforced concrete slabs, tanking, drainage and fit-out — all with complete respect for your home and transparency at every step.
A Basement Conversion Company Rooted in West London
We’ve completed basement conversions across West London and surrounding neighbourhoods — including both retrofit excavations and new-build basements. Our understanding of local planning policy, conservation rules, shared boundaries, and access constraints ensures smoother approvals and more predictable delivery.
Basement conversion in Chelsea
In Chelsea, we undertook a full back-to-brick transformation of a Victorian terrace, where structural integrity and precise planning were paramount. As part of the works, our team carried out complex structural adjustments that mirrored the challenges of a basement conversion — from damp-proofing to underpinning and restricted access in narrow residential streets.
The project demanded a technically robust approach, coordinating excavation-related works alongside reconfiguration and extension. Our expertise ensured safe handling of load-bearing walls, moisture management, and seamless integration of new living areas with the property’s heritage fabric. This delivery reflects the precision and craftsmanship required in every Chelsea basement conversion.
In Chelsea, we undertook a full back-to-brick transformation of a Victorian terrace, where structural integrity and precise planning were paramount. As part of the works, our team carried out complex structural adjustments that mirrored the challenges of a basement conversion — from damp-proofing to underpinning and restricted access in narrow residential streets.
The project demanded a technically robust approach, coordinating excavation-related works alongside reconfiguration and extension. Our expertise ensured safe handling of load-bearing walls, moisture management, and seamless integration of new living areas with the property’s heritage fabric. This delivery reflects the precision and craftsmanship required in every Chelsea basement conversion.
“Excellent construction company in London – professional, reliable, and delivered high-quality work on time and within budget. Highly recommended!”
— Serdi Legisi
Testimonials
“The team carried out a basement conversion and completely redesigned our kitchen, including installing rear crittal doors. They did a wonderful job, on time and broadly on budget. Communication was excellent and reassuring.”
Matthew Hamilton
Basement Conversion FAQs
A full basement conversion typically takes around six to eight months. Timelines depend on whether we are excavating a new space or converting an existing one, as well as the complexity of design features such as reinforced concrete slabs, underpinning, or bespoke finishes.
Where We Work
We build basements across Chelsea, Fulham, Kensington, Notting Hill and neighbouring West London postcodes — including SW3, SW5, SW6, W6, W10 and W11. Our team is well-versed in the planning challenges, access constraints, and structural requirements typical of basement construction in these areas.
If your home sits just outside these postcodes but your project aligns with our approach, we’re happy to advise. We occasionally take on complex basement projects further afield where our experience, communication, and attention to detail ensure a smooth and successful build.
If your home sits just outside these postcodes but your project aligns with our approach, we’re happy to advise. We occasionally take on complex basement projects further afield where our experience, communication, and attention to detail ensure a smooth and successful build.
Planning a Basement Conversion?
Whether you're early in the planning stage or already have approved drawings, we’d be happy to advise. Contact us directly or use the form below to request a complimentary quote.