The Harry Café de Wheels owner Michael Hannah and his co-owners are selling the home of Hannah's Pies in Ultimo at March 1 auction.
The Harris Street site is tipped to fetch about $20 million through Colliers.
It is made up of a warehouse and adjoining terraces.
Hannah's Pies, which sells pies over the counter at Harris Street, is the sole supplier to Harry Café de Wheels outlets.
The sale of the property comes as the pie cart business launches in China, with up to 300 of its carts to be rolled out across the country over the next 15 years.
