The Hamilton-based company has developed two hotels in that city and the major Te Rapa shopping precincts, The Base and Te Awa. It sold half the 31-hectare retail complex to Kiwi Property in 2016. It is currently developing a 480ha inland port and industrial and manufacturing park at Ruakura.
TGH is the largest landowner in the Hamilton CBD.
The new ACC complex will rise on land returned to Waikato-Tainui in 1995 as part of a Treaty of Waitangi settlement. On behalf of the tribe, TGH owns the ground leases on many Waikato landmarks, including Waikato University, Wintec, the Huntly power station and CBD retail precinct Centreplace.
The new ACC complex will have a 4.5 star green rating, more than 50 car parks and multiple charging stations for electric vehicles, including scooters and bikes. Ground floor retail and food and beverage outlets are in the plan.
ACC chief executive Scott Pickering said the build was the next step in a partnership formed with TGH in 2014.
Hamilton was an important business hub for ACC's operations and offered the agency's full range of services. Many of the staff there had national responsibilities, Pickering said.
Joblin said TGH's rate of return on the ACC complex investment was commercially sensitive but was in line with the market and the size and complexity of the building.