Queenstown slipped to second place after topping the survey for the last 15 consecutive quarters.
Confidence dipped to a net positive 46 per cent - down 11 percentage points from 57 per cent the previous quarter. The top five wererounded out by Wellington (41 per cent net positive) and Auckland and Nelson (39 per cent each).
Simon Clark, managing director of Colliers International Tauranga, says the results reflect Tauranga's ongoing growth. "Both Tauranga and The Mount are experiencing a major commercial property boom.
"There's record low vacancy across all the key commercial sectors — office, retail and industrial — which is driving down yields and pushing up rents. Investors see Tauranga as being more affordable than Auckland but offering equally strong fundamentals and returns."
Nationally, the survey shows that retail property sentiment appears to be gaining positive momentum.
Colliers International's director of research and communications, Chris Dibble, says retail has risen from a net negative rating to a net positive 4 per cent nationally.
"We saw a big uptick in confidence in Wellington's retail sector in particular. Confidence increased from a net positive 12 per cent last quarter to 25 per cent in the latest quarter."
Dibble says the industrial sector continues to flourish.
"Industrial is at an almost three-year high, at 46 per cent net positive nationally — the best result since the March 2015 quarter. All three main regions posted a positive gain in confidence relative to a quarter ago."
Dibble says it's much of the same story for the office sector.
"A net positive 29 per cent for the three main regions was recorded, up from 26 per cent last quarter."