The group, which also operates road building and television broadcasting businesses, said it expected economic and competitive conditions to stay challenging this year and that all its businesses would prioritise a return to growth in 2016.
Current operating profit reached 888 million euros ($1.01 billion) last year, against a restated 1.319 billion in 2013, Bouygues said in a statement.
Sales stood at 33.138 billion euros, broadly unchanged from 33.121 billion a year earlier.
This compared with company-compiled average estimates from analysts of operating profit of 855 million euros on sales of 32.991 billion.