Kim Dotcom is eager to buy the mansion which the government barred him from owning.
The detail has escaped from a court hearing about the internet tycoon's finances.
It matches up with a trigger date which passed in September, meaning he no longer needs government permission to purchase the home.
Crown lawyers told the High Court in Auckland Mr Dotcom was planning to buy the mansion. In the hearing, Crown Law Office lawyer Anne Toohey expressed concern over the purchase and Mr Dotcom's new business venture, an encrypted cloud network dubbed Mega. "There is a concern how this new venture is being funded."
The mansion was said by Crown lawyers to be worth $21 million.