The value of residential consents was up by about 12 per cent last month, with 69 issued worth $5.4 million compared to 84 worth $4.8 million last year.
Rotorua Chamber of Commerce chief executive Darrin Walsh said the October drop was a little concerning but it was likely to be a blip.
He said commercial consents were often "quite chunky" and it only needed one or two big consents to really change the statistics.
Mr Walsh said there were several big projects such as Pukeroa Oruawhata's $20 million redevelopment of Trade Central and Te Arawa Lakes Trust's proposed $6 million office block which had recently been announced but hadn't yet been through the consent phase.
He said a real concern was making sure sections became available soon to sustain growth.
"We are told they are coming. Once they come to market it will take off and consents will skyrocket."