Duke has been approached for comment.
Residents of Auckland's wealthiest suburb had concerns about Duke's proposed helicopter flights from his new residence and the effects on their precious beach.
Dirk Hudig of the Herne Bay Residents Association said his organisation had received a significant amount of correspondence from people worried about plans for helicopters to take off and land at a boatshed Duke and wife Patricia have consent to demolish on their Sarsfield St property.
The new boatshed would be built with a James Bond-style roof which would open, turning the structure into a helicopter landing pad, consent documents from the council show.
The boatshed is on the popular inner-city Sentinel Beach.
"Our view is that it's a consent application which ought to have been publicly notified because the boatshed is in a recreational area," Hudig said last week.
"We have visions of someone sitting on the beach and the helicopter blasting sand all over the place and a big backwash from the sea. Because this is public land, it ought to have been notified."