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Heslop said the number of stand-alone houses consented rose 12 per cent to 25,383.
"The number of multi-unit homes consented has steadily increased over the past decade, but this is the first 12-month period where there have been more multi-unit homes consented than stand-alone houses," Heslop said.
Multi-unit homes include townhouses, apartments, retirement village units and granny flats.
In March, 5303 new homes were consented, the highest monthly number on record. Of these, 3000 were multi-unit homes and 2303 were stand-alone houses.
The 3000 multi-unit homes included 2172 townhouses, flats, and units, 616 apartments; and 212 retirement village units.
Four regions had record numbers of new homes consented in the year: Auckland with 21,477 consents which was up 23 per cent annually, Wellington with 3836 consents, up 26 per cent, Canterbury with 8557 consents up 41 per cent and Otago with 2506, up 34 per cent.
Almost $1 billion of non-residential building work was consented in March: Auckland with $430m, Wellington $108m, Canterbury $104m and the Waikato $78m.
The Herald reported yesterday that construction is New Zealand's fourth biggest employer at 280,000-plus people.
Yet the country is still short of people because growth is so strong.
By 2024, national annual residential and commercial construction values will hit $48.3b, according to the National Construction Pipeline Report 2021, up from $45b in 2018.
Impediments that could prevent activity in the residential sector from growing in the short term include access to skilled workers and access to materials, the report said.