Mr Jeffries said that while the average asking price in Auckland had increased by 20 per cent, small houses - one to two bedroom - had increased 24 per cent while apartments were up a "staggering" 49 per cent in a year.
"It's a massive amount of money for an apartment but that's the grim reality of the demand from buyers in the Auckland market now," he said.
In the regions, most reported rises of less than 10 per cent over the past year, with the exception of Hawke's Bay, 18.9 per cent, and the West Coast, 14.2 per cent.
Waikato experienced a 6.1 per cent increase, Canterbury 5 per cent, Nelson/Tasman 4.4 per cent and a 3.2 per cent rise in Marlborough.
As in July, four regions showed a year-on-year decline in average asking price in August. The largest fall was seen in Gisborne of -17.7 per cent.
With the exception of July, Otago has experienced decreasing average asking prices for the last six months.
"Taranaki now appears to have run out of steam after some extremely strong growth in the last year including monthly increases as high as 24 per cent."
Wellington continues its modest average asking price growth in August, up an anaemic 0.5 per cent year-on-year. Growth in average asking prices has now been sluggish in the capital for six months.
PROPERTY PRICES - August 2014 to August 2015
GOING UP
• Auckland - 20.2 per cent
• Hawke's Bay - 18.9 per cent
• West Coast - 14.2 per cent
• Southland - 9.4 per cent
GOING DOWN
• Gisborne - 17.7 per cent
• Otago - 3 per cent
• Taranaki - 2.3 per cent
• Manawatu/Wanganui - 1 per cent