His communications manager Andrew Robertson said, "Our database of career-seekers is depleted to the point that there are no people left to put in contact with hiring employers. The situation is becoming a major issue in Auckland and Christchurch. We are simply running out of people who want to be apprentices."
The extraordinary turnaround reflects a recovery in residential building consents from a low of 32,000 in the year to June 2011 to 44,000 in the latest June year, although this is still well below the previous peak of almost 55,000 in 2003-04.
Similarly, apprentice numbers in the core building trades are still below their last peak of 8939 in 2007, despite a Government incentive of $2000 for every new apprentice and a matching $2000 for their employers in priority trades such as building since April last year. The incentive expires at the end of this year.
National and Labour both unveiled initiatives last week to boost affordable home building aimed at first home buyers, but experts questioned whether either party could ramp up building fast enough because of the shortage of builders.
"My biggest concern is whether we will have the people to build the houses," said mortgage broker Bruce Patten.
"We are getting so many complaints about group home builders who are making promises and not delivering."
Mr Larsen-Marsters said the $2000 grant paid for his tools, and a cadetship funded by Te Puni Kokiri paid for his first years' apprenticeship fee of $1470. He boasts a rich Kiwi mix of Tuhoe, Tuwharetoa, Rarotongan, Tahitian and Norwegian ancestry.
He started in the industry with a local Helensville builder, then took time out before signing up with family friend Seti Fa'aofo of Koru Builders.
"I said I want to try a few other jobs before I lock myself in," he said.
"I worked in a few other jobs but nah, after a few months I decided I'll get back into building and hooked up with Seti.
"If you're a hands-on type of person and you're not dumb, then building is for you, I guess if you don't mind hard work."
He earns "apprentice wages" of only about $15 an hour and spends about $20 a day on petrol getting from Helensville to building sites across Auckland, but said, "If you're smart about it, it's manageable.
"I want to finish my apprenticeship and by then hopefully I'll understand how it all works and be in the top seat and I guess try and run my own crew."
On the web
www.bcito.org.nz/lookingforwork