"At the moment MBIE is only able to authorise a total of 100 workers for three specified products."
The rising cost of supplies is being blamed.
The ruling was described as a landmark decision.
The council says his offending was calculated and deliberate, for commercial gain, and put neighbours at risk.
Bank lending for commercial property development is expected to tighten over the next six months.
Jess and her partner Warren have been renovating the old Ponsonby Masonic Hall slowly since they got the keys in 2016.
Some say the new rules are risky and they're worried about cowboy DIY jobs.
The exemptions will save homeowners $18 million in consenting costs each year.