Russell's new seven-level office building at 8 Mahuhu Cres stands on a 2419sq m site owned by Ngati Whatua Orakei Whai Rawa.
Russell heads one of the city's most active construction businesses, the family-owned Dominion Constructors, and is represented in the leasehold negotiations by specialist RMA barrister Russell Bartlett of Shortland St. Ngati Whatua is represented by Liam McEntegart.
Russell expects his site's fate to be decided soon.
"We're in discussions with them now and will resolve those within the next month. If that doesn't happen, we'll have arbitration. It's more of a square metre rate," Russell said.
Michael Bilsborough, Aecom's associate director for architecture, said that on September 24 the firm left two Newmarket sites for the Quay Park building where it leased three floors, with the capacity for 420 workstations, although about 360 staff work there.
Russell said the lease was struck for nine years.
Dean Kimpton, Aecom managing director, said shared spaces, team spaces and individual workspaces are features of the new offices.