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Together we shape, create, deliver

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

About us
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Full Year Results for Year Ended 31 December 2025

Continued strong performance and a record forward work

FY 25 Results
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Costain chosen for Dover Harbour Board Framework

Costain to deliver utilities infrastructure upgrades to build resilience into UK international trade and drive economic prosperity.

Read our press release
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Costain enhances inclusive and sustainable PPE offering

Revamped PPE catalogue ensures improved comfort and accessibility for our people

View press release
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Costain delivers 1625km of gas main line for Cadent

Costain marks five-year milestone with upgrades to continue through to 2029

View press release

Together
we deliver

Explore our sectors
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Our commitment to create connected, sustainable infrastructure is core to all our activities across our six sectors: Road, Rail, Integrated Transport, Energy, Water and Defence & Nuclear Energy.

Together
we solve

Explore our services
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As construction, consulting and digital partners we bring together a mix of experts to engineer solutions to the most complex infrastructure problems. We anticipate and solve our customers’ challenges, helping them deliver their strategies and progress their business plans.  

Together
we succeed

Careers at Costain
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We're looking for curious, collaborative and courageous people who'll help transform the performance of infrastructure. Whether you’re an experienced professional looking for a new challenge, or entering the workplace for the first time, we can offer you the very best opportunities and support for your career. 

Together
we care

Sustainability at Costain
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We’re committed to building a long–term sustainable company that creates economic, environmental and social value for our stakeholders. Our sustainability performance is the responsibility of every individual in our organisation.  

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FY 2025 Results and Annual Report

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