The two-storey office building is part of the firm's £12.5 million business park development for Cheshire-based Métier Property Holdings. Work will cover construction of three office blocks.
It will be opposite CPUK's existing base in the West Lancashire Investment Centre. The project is set to start in July.
CPUK managing director Steven Burke said: "This is a great location, we have substantial contracts across the North West and White Moss Business Park is ideally situated for us."