Costain helps to improve people’s lives by creating connected, sustainable infrastructure that enables people and the planet to thrive. We shape, create, and deliver pioneering solutions that transform the performance of the infrastructure ecosystem across the UK’s transportation, energy, water, defence and nuclear markets. 

We are organised around our customers, anticipating and solving their challenges and helping to improve performance. By bringing together our unique mix of  consulting, digital and construction experts, we engineer and deliver sustainable, efficient, and practical solutions.

 We help to safeguard security, increase capacity, improve customer service and drive efficiency in our customers' infrastructure programmes.  We deliver a range of services across the whole project lifecycle, including strategic advice and feasibility studies, concept design, planning and legal approvals (such as DCO), detailed design, asset optimisation, technology integration and the construction of complex major projects.