Much of the land has been zoned for residential development under what is called the Iona Special Character Zone in the district plan.
The Overseas Investment Office (OIO) had to give consent for the large purchase as CDL is categorised as an overseas company.
Consent was given in July 2021 and the OIO noted the investment would provide "substantial and identifiable" benefits including by creating jobs and housing.
A rival New Zealand-owned developer Winton Property Investments - who offered a much lower price to buy the land - challenged that OIO decision and took the matter to the High Court.
Winton lost that judicial review in the High Court earlier this year and had its application dismissed.
However, Winton has since appealed that judgment, and the matter remains before the courts.
Despite an appeal pending, the initial outcome in the High Court marks a victory for CDL and its large subdivision plans.
"The initial resource consent applications have been lodged with council and, if approved, we expect to begin earthworks before the end of this year," a CDL spokesman said, when contacted this week.
"We are targeting over 600 sites for the whole development."
It is understood CDL plans to subdivide the land into those lots which will then be made available for housing.
The land has previously been used for casual sheep grazing.
The Overseas Investment Office stated its consent for CDL related to the company converting the land into a development "for about 600 new homes".