Cotswold Contractors have a proven track record within the groundworks & civil engineering sector. We offer a number of services which we will tailor in-line with your specific requirements. Here are some of the services we offer.. Foundations: Block & brick work, slab laying, concreting, drainage, structural steel work. Drainage: Septic tanks, sewage treatment plants, rain water harvesting systems, waste separation systems. Civil engineering: Substructures, concreting, kerbing and surface works. Excavations: Site clearance, land reclamation, surface removal and surface installation, topsoil stripping and importation, cut and fill laser levelling, landscaping works, pools and lakes, menages.