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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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Costain announces strong interim results for half year 2026

On track to deliver step change in performance in 2027 and beyond

Find out more
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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
Costain Hires Record Number Of Apprentices #1 Credit Costain

Costain welcomes record number of apprentices for 2026

50 apprentices are beginning careers at Costain across its infrastructure projects

View press release
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Costain to design and build West Winch Housing Access Road

Costain chosen by Norfolk County Council for transport link which will serve up to 4,000 new homes near King’s Lynn.

View press release

Together
we deliver

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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

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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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HY 2026 Results and Annual Report

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