New Zealand's $1 million suburbs club has gained seven new members this year.

Data from homes.co.nz shows areas around the country joining the list of suburbs where average house prices run into seven digits.

The new arrivals were Britannia Heights, in Nelson, Frankton, in Queenstown, Jacks Point, Queenstown, Lake Okareka, in Rotorua, Matapouri, in Whangarei, Redwood Valley in Nelson and Khandallah in Wellington.

While Queenstown properties generally command at least a million dollars, Rotorua and Nelson suburbs were standouts for their region – Rotorua has an overall median HomesEstimate of $422,000, up 15.8 per cent year-on-year, and Nelson a median $528,000.

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TRADE ME A house for sale for $1.35m at Britannia Heights, Nelson.

"Despite a soft market in Auckland, prices in many of the regions continue to grow," said homes.co.nz data scientist Tom Lintern.

"The secret's out for Nelson, Queenstown, Rotorua and Matapouri. All have suburbs where the average value has exceeded $1m for the first time this year."

Auckland has about 100 suburbs with an average HomesEstimate exceeding $1m, of a total 160. The average HomesEstimate for whole city is $1.1m.

Data from CoreLogic shows there are now 17 suburbs outside Auckland worth more than a median $1m.

Top of the list was Kelvin Heights, Queenstown, with a median value of $1.75m.

Others included Roseneath, Wellington, Fendalton, Christchurch, and Arrowtown.

Nick Tuffley, ASB chief economist, said that, over time, the number of $1m suburbs would grow.

"As long as we see New Zealand having population growth and any degree of consumer price inflation you are likely to see house prices over a long period of time go up in value."

He said as the population grew, the value of land would rise, particularly in inner-city areas where people were prepared to pay more for the convenience of living close by.

"As house prices go up more suburbs will enter the million-dollar club."

TRADE ME A property for sale for $989,000 at Lake Okareka.

He said it would take a declining population, or declining incomes - or a combination of both - to create a sustained downward trend in house prices.

Some of the newly minted seven-figure suburbs might drop under $1m briefly in the short term bu the long-run trend would be for them to remain above the $1m mark, he said.

Property commentator and real estate agent Alistair Helm said the number of suburbs crossing $1m would probably be fewer ein the next year than in the past three.

Auckland's market was stabilising and prices were even edging down in some parts, he said.

TRADE ME A property with water views for sale for $.1295m at Matapouri.

"The rest of the country is coming off some fairly good price appreciation, it's going to start to reflect the Auckland stagnation. If you look at how many suburbs become $1m suburbs per year, that number that graduate is going to reduce over the next couple of years."

Bindi Norwell, chief executive at Real Estate Institute said many regions had experienced significant growth over the past year as demand for good housing stock exceeded the supply of houses.

"Additionally, we're still seeing a number of Aucklanders, particularly first-home buyers, move to the regions where they can get more for their money. This effect continues to drive up prices in the regions and until we address the fundamental supply issues, we believe house prices will continue to increase in the short to medium term.

"The last REINZ Million Dollar Price Report showed that the number of million-dollar plus properties sold around New Zealand in the first half of 2018 increased by 4.2 per cent when compared to the first half of 2017. This meant that the first half of 2018 saw an additional 218 houses sold over the million-dollar mark when compared to the same time last year, from 5220 houses to 5438.

"However, the number of million-dollar-plus properties sold in the first half of 2018 was below the record of 5867 in the second half of 2016."

$1m suburbs outside Auckland

Kelvin Heights, Queenstown-Lakes District: $1,754,950

Lake Hayes, Queenstown-Lakes District: $1,579,550

Jacks Point, Queenstown-Lakes District: $1,353,300

Arrowtown, Queenstown-Lakes District: $1,342,650

Seatoun, Wellington City: $1,316,250

Karaka Bays, Wellington City: $1,256,050

Roseneath, Wellington City: $1,242,650

Queenstown, Queenstown-Lakes District: $1,210,800

Wanaka, Queenstown-Lakes District: $1,195,150

Kelburn, Wellington City: $1,186,400

Lower Shotover, Queenstown-Lakes District: $1,169,300

Arthurs Point, Queenstown-Lakes District: $1,154,900

Fendalton, Christchurch City: $1,118,500

Kennedys Bush, Christchurch City: $1,107,650

Scarborough, Christchurch City: $1,106,450

Wadestown, Wellington City: $1,060,150

Khandallah, Wellington City: $1,004,200

Source: CoreLogic