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About us

Our purpose is to improve people’s lives by creating connected, sustainable infrastructure that enables people and the planet to thrive.

Our story

We’ve been improving the lives of people since 1865.

Costain is one of the first to achieve the BSI Kitemark for innovation, enabling us to bring the latest thinking and technology to all of our projects


Officially a Very Good Company to Work For and ranked as one of the best big companies to work for in the UK

Costain at a glance

Key facts

Listed on the UK stock exchange and recognised as one of the UK’s leading sustainable infrastructure solutions companies


Founded in Liverpool


Employees across the UK

Key facts

Broad range of innovative services across the whole lifecycle of our customers' assets


Adjusted Group revenue for year end 31 December 2023

Costain at a glance

Meet the experts


Our culture

We are committed to operating responsibly and with high ethical standards.

We’re committed to building a long–term sustainable company that creates economic, environmental and social value for our stakeholders.