A2 Site Investigation Limited

A2 Site Investigation is a London-based ground and structural investigation company working across the UK. Its team of engineers, project managers and technical specialists supports the design and development of buildings, infrastructure and other spaces through geotechnical, structural and environmental investigation.

The company provides cable percussion drilling, dynamic sampling, rotary drilling and restricted-access drilling, including modular rigs for confined sites, basements and areas reached through narrow doorways or down stairs. Its wider investigation work includes structural investigations, trial pitting and foundation investigations, with sampling and in-situ testing used to build a clearer picture of ground conditions.

Laboratory testing is arranged through partner laboratories across the UK, covering routine and advanced geotechnical, environmental and materials testing. A2 Site Investigation also provides monitoring services, including gas and groundwater monitoring, sampling and testing, plus geotechnical instrumentation and vibrating-wire monitoring.

Projects range from house extensions and basements to tall buildings, tunnels, hospitals and public infrastructure. The company describes a collaborative approach for developers, principal contractors, engineering professionals and ground engineering contractors, with specialist equipment suited to technically demanding and restricted urban environments.