Lawyer Francelle Lupis at Russell McVeagh submitted Unitec's 176-page scheme.
"By unlocking the enormous untapped commercial potential of Unitec's land asset, Unitec will create and maintain an endowment fund that will allow Unitec to achieve its goal of becoming a world-leading technical institute," the submission said.
"Unitec's vision for the Wairaka site will provide high-quality residential intensification."
Casey said people had been blind-sided by the plan and she feared for the Mt Albert town centre and the effects on the area between Carrington and Great North Rds and the North- Western Motorway.
"This is one of the prime pieces of open space in the area.
"What the Unitary Plan has done is put dollar signs in people's eyes , " she said.
The submission refers to funding issues and the unlocked potential of the land.
"The building portfolio is inefficient, with most no longer being appropriate for the education that Unitec needs to deliver," it said.
"Many of the buildings are in poor condition or have significant seismic risk, with Unitec simply not being in a financial position to keep up with maintenance responsibilities or strengthening requirements."