The former boss of the Registered Master Builders Association is being investigated by officials for potential breaches of the Companies Act.
Blair Cranston was a Master Builders' life member and its president from 2010 to 2012. He was expelled from the organisation in December 2016 for breaches of its code of conduct.
His firm, Cranston Homes, failed last year and liquidator Boris van Delden released his final report to the Companies Office last week.
That report confirmed that tradespeople and others owed $3.6 million by the firm will get nothing back.
Cranston, now working as a real estate agent, told the Herald that out of the $3.6m, interests associated with him were owed between $1.2m and $1.6m.