Wellington also posted a big drop over 12 months - from 107 to 65.
The monthly figures for the region since last September revealed the new home approvals programme was something of a rollercoaster ride with 33 last October, 51 in November, 26 in December and 37 in January.
The lowest monthly figure was April this year with just 23 approvals.
Across the whole of the North Island, there were 865 approvals.
In dollar terms, the September figure for the Bay was $6 million worth of approvals - the same as in April and June but down from the $14 million in August.
It reflected the national trend over the two months.