"There's also increased compliance costs around health and safety, and engineering requirements, which are still affected by the Christchurch earthquakes."
He hadn't noticed a notable drop in activity, however.
"It's always quieter during the colder months. This year has been a particularly cold winter so that might have a bit to do with it."
Nationally, 12,057 new dwellings - worth almost $4 billion - were consented in the past six months.
"The new building consent figures show the total floor area for the dwellings consented was 221 hectares," Statistics NZ's Clara Eatherley said. "This means that enough new homes were consented in the first half of 2015 to cover an area twice the size of Wellington Airport."
In June, 2042 new dwellings were consented - 40 more than in June 2014. In seasonally adjusted terms, June consents were down 4.1 per cent on May. Just over 1500 of June consents were for houses, 70 for apartments, almost 160 for retirement village units and more than 300 for townhouses, flats, and units. NZME