The country's construction sector is seen as the driving force in the economy in coming years with a $40 billion spend on rebuilding Christchurch, the country's second biggest city, and the need to meet a shortage of housing stock in the biggest city of Auckland.
Today's figures showed the value of non-residential construction permits rose 24 per cent to $434 million from a year earlier, and was up 9.2 per cent to $4.04 billion on an annual basis. The value of all building permits was up 32 per cent to $1.16 billion in May, and 19 per cent to $10.89 billion annually.
Westpac economist Michael Gordon said the building consent figures were "well ahead of forecasts".
"We think this series has been distorted by the earlier timing of Easter this year, resulting in a 9.7 per cent drop in March followed by a 21 per cent jump in April; a return to 'normal' levels would have implied a fall in May. But the underlying picture was clearly stronger than we expected," said Gordon.
"Some of the surprise was due to apartment units, which rose from an already-high 214 in April to 219 in May - in seasonally adjusted terms, this was the highest in four years. But ex-apartment consents were also remarkably strong (our attempt to correct for the Easter impact suggests a 4 per cent rise in May)."
ASB Bank economist Christina Leung said the increase in dwelling consents was again driven by the higher number of consents issued for apartments.
"Excluding the volatile apartment consent issuance component, core dwelling consents eased slightly. Nonetheless, beyond the monthly volatility the underlying trend in core dwelling consent issuance indicates a continued improvement in house-building demand."
"The increase in dwelling consent issuance in May reflects stronger house-building demand, particularly in Auckland and Canterbury where housing shortages are most acute. We expect these regions will remain the key drivers of higher residential construction activity over the coming years. The recovery in non-residential construction demand is also encouraging, and points to increasing confidence amongst businesses towards non-residential investment," said Leung.
" We expect underlying inflation pressures will lift later this year as construction activity continues to ramp up and capacity pressures build in the NZ economy. We continue to expect the Reserve Bank will first lift the OCR in March 2014."