Many brownfield sites undergoing redevelopment contain a significant number of ground conditions such as buried foundations and structures that may be unknown to the developer or purchaser. Effective ground investigation using geophysical technologies can localize anomalies on site that highlight these features and is then followed by intrusive investigation. This case study describes how a site-wide geophysical survey was used in conjunction with targeted standard intrusive methods to evaluate the extent of remnant buried structures on a brownfield site. The end result provided a more comprehensive understanding of the site than could have been obtained by undertaking intrusive investigations alone. The combination of geophysics and intrusive investigation can provide more valuable information than that gained by using either in isolation.