EGM Statement

Costain Group PLC
02 February 2007


Costain Group PLC
('Costain' or the 'Company')


Result of Extraordinary General Meeting

Costain announces that, at the Extraordinary General Meeting held earlier today,
all the resolutions proposed were passed by the Company's shareholders.

All resolutions proposed at the Company's EGM were carried on a show of hands.
The proxy figures for the resolutions were as follows:

                  VOTES FOR          VOTES AGAINST     DISCRETIONARY    TOTAL VOTES CAST VOTES WITHHELD*
                                                       VOTES

Resolution 1      249,083,530        204,856           344,930          249,633,316      615,541

Resolution 2      247,568,283        1,497,579         454,108          249,519,970      728,887


*Note: A vote withheld is not a vote in law and is not counted in the
 calculation of the proportion of votes 'for' and 'against' a resolution.

Copies of the resolutions passed at the Company's EGM have been submitted to the
UK Listing Authority and will shortly be available for inspection by the public
during normal business hours any weekday (public holidays excepted) at the UK
Listing Authority's Document Viewing Facility, which is situated at The
Financial Services Authority, 25 The North Colonnade, Canary Wharf, London E14
5HS.

                                                                 2 February 2007

Enquiries:

Costain                                                       Tel: [phone]
Andrew Wyllie, Chief Executive
Tony Bickerstaff, Finance Director
Graham Read, Public Relations

College Hill                                                  Tel: [phone]
Mark Garraway
Matthew Gregorowski


                      This information is provided by RNS
            The company news service from the London Stock Exchange