In the biggest quarterly jump in a decade, building work grew almost 10 per cent in the three months to the end of September, according to official figures.
The Christchurch rebuild is a factor in the leap, but house building in the upper North Island, especially Auckland, is also growing strongly. Commercial building work is also growing rapidly.
Statistics NZ said the seasonally adjusted volume of building activity increased 9.6 per cent in the September 2012 quarter.
"This is the largest quarterly increase for 10 years," industry and labour statistics manager Blair Cardno said.
"While the earthquake rebuild in Canterbury contributed to this, residential building work in the upper North Island also experienced growth."
"The increase in residential building work for the upper North Island is likely to be concentrated in the Auckland region," Mr Cardno said. "The number of building consents for new dwellings in this region has grown recently, reaching the highest level in four years."
For the country overall, non-residential building activity increased 12.4 per cent, while residential building activity increased 7.1 per cent.
The trend for overall building activity indicates strong growth in the September 2012 year.