WJB Groundworks is one of London’s most trusted basement contractors. We deliver high-quality basement construction services for residential and commercial properties across Greater London. Established in 2014, our team brings over a decade of hands-on experience in structural groundworks, basement excavation, underpinning, and reinforced concrete construction.
Every site is different. Our team tailors each approach to your specific ground conditions, plot constraints, and structural requirements. Results are delivered with minimal disruption and consistent precision.
We assess your ground conditions first, then develop a bespoke construction plan built around your vision. Our expertise covers reinforced concrete foundations, underpinning solutions, damp proofing, and complete basement builds.
GET A QUOTE
Consult with our specialists and book an on-site inspection at your convenience. Contact us at 02037541809, or email us at info@wjbgroundworks.com for a bespoke quote. Visit our portfolio and explore the projects we have conducted successfully.
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London’s property market places a high premium on space. Building downwards is one of the most cost-effective ways to expand your floor area without losing garden space or conflicting with planning height limits. In Greater London, every additional square metre carries real financial value.
Basement construction is also remarkably versatile. A well-designed lower-level space can become a home cinema, gym, rental unit, or commercial utility area. It adapts to your needs over time.
WJB Groundworks combines structural engineering expertise with advanced excavation techniques and a thorough knowledge of London’s ground conditions.
We survey the land, test the soil, and prepare the site for construction, identifying ground conditions and the safest approach before work begins.
We excavate to the required depth and install strong reinforced concrete foundations to provide a stable, load-bearing structural base.
We build the structure and apply damp-proofing and waterproofing solutions in accordance with BS 8102 to prevent moisture issues.
We complete all finishing work to your specification and carry out final quality checks before handover.
Whatever your goal, WJB Groundworks delivers basement construction services built around it. We work with homeowners, developers, and commercial clients to maximise the potential of every site.
Every project complies fully with UK Building Regulations and relevant safety standards. Our award-winning safety team protects everyone on site and gives clients confidence at every stage.
GET A QUOTEWJB Groundworks prides itself on delivering construction at its finest. Here is what sets us apart:
Clear quotes with no hidden costs.
Dedicated groundworks and basement construction professionals.
Strict adherence to UK Building Regulations and planning requirements.
Trusted by residential and commercial clients since 2014.
Precision-led delivery with no compromise on quality.
Proactive hazard identification and mitigation on every project.
Led by a recognised, dedicated safety team.
Single point of contact from start to finish.
Full in-house technical capability.
A testament to our reliability and client satisfaction.
Ready to get started? Contact WJB Groundworks, London’s trusted basement construction specialists.
STEP -01
We survey the land, test the soil, and prepare the site for construction.
STEP -02
We excavate to the required depth and install strong reinforced concrete foundations.
STEP -03
We build the structure and apply damp-proofing and waterproofing to prevent moisture issues.
STEP -04
We complete all finishing work and carry out final checks before handover.
Consult with our specialists and book an on-site inspection at your convenience. Contact us at 02037541809, or email us at info@wjbgroundworks.com for a bespoke quote. Visit our portfolio and explore the projects we have conducted successfully.
The cost is influenced by the size and depth of excavation, ground conditions, structural design complexity, waterproofing specification, and finishes required.
Yes. We excavate beneath the ground floor using underpinning and structural support systems to create a safe lower-level space.
Limited sunlight and the surrounding soil naturally regulate the temperature of a basement.
Yes. The additional square footage directly increases the market value of your property.
Basements can be used as a home cinema, gym, guest bedroom, home office, playroom, utility room, additional living space, or rental unit.
Many basement projects qualify under Permitted Development rights, but listed buildings, conservation areas, and complex projects typically require planning.
A typical residential basement build takes between 10 and 20 weeks from excavation to handover.
Underpinning strengthens and deepens existing foundations to allow safe excavation beneath a property.
We apply Type A tanking, Type B structurally integral waterproofing, and Type C cavity drain membrane systems in accordance with BS 8102.
Some noise and vibration are unavoidable, but we follow local authority working hours and manage the site considerately.
Yes. Our services extend to commercial, mixed-use, and residential developments.
Our engineers assess the structure and ground conditions before work starts, then use propping, shoring, and staged excavation techniques.