Costain Group

Costain focuses on UK infrastructure markets—transport, water, energy, and defence—using expert delivery and productivity to serve communities.

Costain combines construction, consulting, and digital expertise to solve complex infrastructure challenges sustainably and resiliently.

Alistair Geddes, Rail Sector Director at Costain, explains why culture, constructability, collaboration are key in the delivery of rail infrastructure.

Interview with Costain rail sector director Alistair Geddes in Rail Professional magazine. Alistair Geddes joined Costain as Rail Director in March 2025 having worked across major infrastructure programmes including High Speed 1, the London Olympics, Hinkley Point C and Crossrail.

Costain promotes production thinking as an alternative to traditional construction methods for delivering infrastructure solutions.

Costain is designing and building a new junction (Junction 22A) on the M5 motorway, supporting the Gravity Smart Campus and Agratas’ gigafactory.

Costain is collaborating with the Police Federation of England & Wales (PFEW), the National Police Chiefs’ Council (NPCC) and National Highways, to raise awareness of the dangers of ‘blue light incursions’ for road workers and the emergency services on motorways and major A roads.

Latest Costain press releases

Leadership

Purpose and values

This page provides public documents related to The Costain Pension Scheme, which closed to new benefits in 2009.

This page lists Costain’s locations and contact methods.

Costain builds connected, sustainable infrastructure to improve lives and support the planet.

Costain policies and useful links to documents.

Costain integrates responsible performance into its corporate and tax strategies for long-term sustainability.

Nuclear Restoration Services (NRS), a subsidiary of the Nuclear Decommissioning Authority (NDA), secures a contract to reduce the height of Trawsfynydd’s reactor buildings. The project involves removing upper sections to lower the structures from approximately 54 meters to 25 meters, altering the site’s skyline. Work is scheduled to begin later this year.

Oct 2026World Nuclear NewsNews article

Transport for London launches a £120 million renovation of South Kensington Underground station. The project includes modernizing facilities and improving accessibility for passengers. Work begins in 2026 to enhance the station’s infrastructure and services.

Oct 2026MetroNews article

Costain Group PLC secures a place on Pagabo’s Civil Engineering and Infrastructure Framework, valued at £4.29 billion. The appointment positions the UK-based infrastructure solutions provider to deliver civil engineering projects under the framework. Pagabo, a major infrastructure procurement platform, has included Costain among its selected contractors for large-scale infrastructure work.

Oct 2026DirectorsTalk InterviewsNews article

Costain secures a **$203 million** contract from Thames Water to upgrade wastewater treatment infrastructure at **15 sites across the Thames Valley**. The project includes **£150 million ($202.9m) worth of upgrades** to treatment assets, marking a significant expansion of Costain’s UK infrastructure portfolio. Thames Water, the UK’s largest water utility, selected Costain for the multi-site modernization effort.

Aug 2026Yahoo FinanceNews article