The total order book is slightly down on the £2.5bn that was in hand this time last year but the short-term workload is slightly up on the £650m that it had acquired for 2012 by the end of 2011.
In addition, Costain is preferred bidder for a further £400m of work.
More than 90% of the order book comes from repeat orders, providing good long-term visibility, the company said.
Chief executive Andrew Wyllie said: "Costain continues to be successful by focusing on meeting the increasingly integrated service requirements of major customers. Utilising a partnership approach, the group provides innovative and cost effective solutions to complex and large-scale customer requirements through its consulting, project delivery and operations and maintenance capability."
Got a story? Email news@theconstructionindex.co.uk
