It is constructed from tilt slab concrete and features three lounge areas, an outdoor entertainer's kitchen, theatre room, two gas fires, remote controlled LED lighting and panoramic views of the Hauraki Gulf.
Property records show Collins and her husband, Oravida director David Wong-Tung, finally sold the house through Barfoot & Thompson in March for $1.9m - the same price they refused to accept two years ago.
They purchased the retreat in 2006 for $1.17m, according to QV. It means they pocketed $730,000 in capital gain from the sale - about $73,000 a year, $22,000 more than Auckland's annual median wage.
The Herald sent questions to Collins asking whether she was happy with the selling price, if Tamaki had been a good tenant, and whether she had declared the $730,000 windfall to IRD for tax purposes.
She did not respond.
A neighbour told the Herald Tamaki moved out of Collins' house several months ago but was now living in another property just down the street.
"He's a couple of doors down. To my knowledge he's renting."
The man said he had little to do with the Tamakis when they were living in Collins' house.
"I seldom saw them."
Questions put to Destiny Church also went unanswered.
Collins was reinstated as a Cabinet minister in December last year.
She resigned from the Justice portfolio during the 2014 election campaign when emails stolen from blogger Cameron Slater implicated her in a campaign to undermine the position of former Serious Fraud Office head Adam Feeley.
Collins was later cleared in an inquiry by retired High Court judge Lester Chisholm.
She and her husband bought a new five-bedroom home in St Heliers in October 2013 for $2.35m. They also own property in Nelson and Wellington.
