He said the council body had sold about $21 million worth of property this year from a $38 million portfolio that the previous councils had earmarked for sale.
The $100 million sales target includes the $38 million of sales already under way.
Auckland Council chief executive Doug McKay said the $21 million worth of sales to date were "just scratching the surface" and further sales could provide significant equity for big infrastructure projects.
Last week, Mayor Len Brown raised the property sales in a major scene-setting speech for a 10-year budget being prepared in his name.
Mr Brown said he did not support the sale of council shares in Auckland Airport or Ports of Auckland, but the Super City had significant holdings of land and buildings that could be sold.
Meanwhile, Mr McKay has been reorganising council accommodation in the central city by taking out a three-year lease on the former Telecom headquarters at Hereford St, off Karangahape Rd, to replace several leases that have expired.
The 3500 council staff who work in the central business district - from a total of 8000 employees across the city - will now be located in four buildings: Hereford St, the Civic Building, Bledisloe House and Graham St.
Mr McKay said he was now looking for a single building to house all the city-based staff over the next couple of years.