It has now run up losses for the last five consecutive years totalling £141m.
The engineering construction and maintenance specialist based in Motherwell said most of the losses were incurred on two of its key contracts where delays have occurred.
Steven Weir, CEO at Bouygues Energies & Services, said: “Lossess were incurred in respect of legacy contracts where technical difficulties were experienced.
“Despite these difficulties, the company continued to deliver successful projects in its core markets, particularly in respect of the design and build of data centres and cleanroom facilities.”
Revenue at Bouygues E&S Contracting UK across the year edged up 5% to £195m.
Over the year the order book grew 10% to £209m, with staff headcount down slightly at 265.