Real estate agent Paul Hodgman of Barfoot & Thompson Royal Oak said the area had increased in popularity with families wanting to be in zone for Royal Oak Primary School.
"There are a lot of people who want to live in a desirable suburb but don't require a [more expensive] grammar zone address," he said.
The seaside suburb of Maraetai, near Beachlands, reached $1,050,850 this month.
Beachlands itself is close to $1 million - reaching $999,300 this month. Others closing in on $1 million include Hillsborough at $984,000, Sandringham at $983,300, Windsor Park at $981,000, Mt Albert at $979,700, Birkenhead at $954,450, Northcote at $948,650 and West Harbour at $922,900.
Bayleys Real Estate national residential manager Daniel Coulson said better roading and public transport had led to Maraetai's growth.
"Maraetai was traditionally a seaside destination ... but with better roads in place, and the city growing, it has been consumed to becoming another suburban destination but with a very laid-back waterfront vibe," Mr Coulson said.
The Pine Harbour link, which took commuters to the city in 30 minutes, was just a five-minute drive away.
The waterfront suburb of Herne Bay was still the only area to reach the $2 million mark, according to QV data, with St Marys Bay pipped to be the second at $1,977,950.
James Wilson from QV said "constrained supply and ever-strengthening demand" were driving the increase in $1 million suburbs and there were more to come.
He said the $1 million suburbs were characterised by well-presented, free-standing properties bought by owner-occupiers looking for school zones.