The business start-up company has occupied more space at Commerce Park in Campbeltown Road, Birkenhead.
Wirralbiz has taken 5,000 sq ft Unit 1, a two-storey office building, on a five year lease with Chainbid.
In the summer, the company moved into the adjoining 5,000 sq ft Unit 2 office from the Wirral Council-owned Egerton House in Tower Road, Birkenhead.
Commerce Park comprises three elements, including the two adjoining two-storey office buildings with car parking, totalling 10,000 sq ft, four trade counter units, and seven self-contained industrial units ranging in size from 600 sq ft to 1,200 sq ft.
Mason & Partners and Mason Owen acted for the landlord in the deal. Details of the rental agreement was not disclosed.
Smith & Sons Property Consultants is joint agent on Commerce Park.