Beach access through the gate will continue regardless of the sale, the council says.
A small house on the property - an old cottage - is occupied by Whangarei Heads identity Zac Smith. It is understood the property has been in the Smith family for several generations.
The property - under four titles - is being marketed by Bayleys, who describe it as a "coastal gem tucked away at the end of a quiet rural road".
"You are left simply breathless as you arrive at the boundary and get your first glimpse of the Pacific Ocean in the horizon and smell and admire the beautiful mature native bush hugging each side of the drive including large ancient kauri trees," the marketers said.
The property has an ocean vista, and views of the Hen and Chickens and is bordered by 276ha of reserve, further adding to its privacy, Bayleys said.
"Kauri Mountain Farm is truly a magical piece of paradise with the most gorgeous white sandy beaches, pohutakawa-clad bays and enchanting native bush that will leave you breathless."