Experience You Can Rely On
With 35 Years drilling experience and 8 years trading experience.
With 35 Years drilling experience and 8 years trading experience.
CSCS-qualified, asbestos-aware, and fully compliant – we prioritise safety every step of the way.
From domestic extensions to commercial developments, we provide solutions that fit your project.
Backed by positive Trustpilot reviews and repeat business – we value every client relationship.
Welcome to SDA Site Investigation LTD, your reliable partner for professional drilling, borehole, and ground investigation services. Based in Kent and working all over the UK, we support projects of all sizes with a focus on safety, professionalism, and accuracy.
For more than 43 years, our team has worked with architects, builders, contractors, developers, and homeowners, delivering clear and practical results that keep projects moving. Whether you require soil testing, water boreholes, geothermal drilling, in-situ testing, or full groundworks support, we provide the expertise to get it done right.
We understand that before construction can begin, you need confidence in the ground beneath your project. That’s where we come in.
Our reputation is built on safety, reliability, and the highest levels of workmanship.
At SDA Site Investigation LTD, we provide a wide range of services to suit both domestic and commercial requirements.
While 90% of our work is commercial, we also provide specialist services for domestic clients across the South East.
We work with construction companies, developers, and architects to ensure large-scale projects begin with accurate site investigations and professional drilling services. Our focus on deadlines, safety, and efficiency makes us the trusted partner for commercial builds across Kent, London, Surrey, and Sussex.
From soil testing before an extension to installing a private water borehole, we offer friendly, straightforward services to help homeowners achieve their goals with confidence.
Our team is based in Queenborough, Kent, and we proudly serve clients across the whole of the UK.
Wherever your project is located, you can rely on us for a professional, efficient, and reliable service.
Safety is at the heart of everything we do. Our team is fully trained, compliant with the latest industry regulations, and always works with full PPE. From initial ground investigations to large-scale drilling and groundworks, we uphold the highest levels of safety and workmanship.
Choosing SDA Site Investigation LTD means choosing a partner who understands the pressures of construction and the importance of accurate site preparation. With our proactive approach, technical expertise, and strong safety record, we deliver results that give you peace of mind.
Whether you’re a homeowner, developer, or contractor, you can trust us to support your project every step of the way.
Ready to discuss your project? Our friendly team is here to help. We’ll provide expert advice, clear solutions, and a free, no-obligation quote tailored to your needs.