The number of new listings in Auckland was 3702 in August, up slightly on the 3526 listings in July.
The national inventory figure also hit a new low of 23 weeks - well below the long-term average of 38 weeks.
Record lows in inventory were also seen in Waikato (27 weeks) and Bay of Plenty (35 weeks), he said.
"Such low levels of inventory continue to place the market firmly in sellers' favour in Auckland. This has been reflected once again in Auckland's average asking price this month of $650,114, the highest recorded in seven years, and a $10,000 rise on the previous Auckland high in July."
Nationally the average asking price for homes remained steady, down just 0.4 per cent to $463,142 from the record-high asking price of $465,191 set in July.
Mr McKenzie said a rise in listings this month and next month was expected.
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