Contractors Brighouse have started work on the next phase of St Modwen's Trident Business Park in Warrington.
The third phase will provide nearly 55,000 sq ft of industrial space and is expected to be complete by August 2008. A fourth and final phase, which does not yet have a start date, will complete the scheme, taking the office offering up to a total of 100,000 sq ft.
Units ranging from 2,000 sq ft to 15,000 sq ft will be available for sale or to rent.
Michael Hosie, development manager of St Modwen, which has its North West regional office on Trident Business Park, said: "We expect demand to be very strong for these well located industrial units. The scheme benefits from being within an extremely well managed, secure CCTV controlled estate and the ability for owner occupiers to purchase industrial space in Birchwood is very rare."
BE Group is acting for St Modwen.