"It's something well into the future ... and we'd need a high level of community engagement."
The four surplus Crown-owned land parcels unveiled yesterday collectively total 30ha, with a mix of 600 high-density terraced housing, apartments and standalone homes envisaged on the land.
Three of the sites are currently owned by the New Zealand Transport Agency and one is vacant land formerly acquired by the Education Ministry for a new high school that is no longer needed.
About 500ha of surplus Crown land had been identified across Auckland with development potential.
Dr Smith would not reveal the location of the other 470ha, as checks on infrastructure and zoning were yet to be completed.
The most advanced of the four land parcels is a 9.5ha site in Massey East where 200 homes could be built, which had been cleared for purchase from the Education Ministry.
Dr Smith hoped to sign a development contract by October and to have the first homes completed by late next year.
The other three NZTA-owned sites could accommodate about 400 homes.
A 1.4ha site at Wiri Station Rd, Manukau could see 60 terraced houses built, a 0.4ha site near Pak'nSave in New North Rd, Avondale could see 60 high-density houses built, and an 18ha site at Brigham Creek Rd, Hobsonville, could accommodate up to 280 homes.