A Chinese developer has been revealed as the buyer behind the $70.7 million sale of Melbourne's Federal Police Building.

Residential developer Sterling Global acquired the property at 383 La Trobe Street from Investa Office Fund in an off-market deal.

The property, which was refurbished in 2008, is leased entirely to the Australian Federal Police and is located in the northern part of the CBD.

Known as the Royal Mint Centre, the building offers four levels of office accommodation, more than 500 secure basement parking bays and a total NLA of 10,012 sqm.

Sterling Global's portfolio already includes an upcoming town home project in Oakleigh in Melbourne's south east.