Auckland-based real estate giant Barfoot & Thompson has hiked a fee charged to some tenants by more than 140 per cent.
The tenant change fee is levied on renters when they decide to bring a new flatmate into the property.
Samantha Arnold, general manager for Property Management, told the Herald the fee was an "industry standard" to meet internal costs associated with occupancy changes.
"There are a number of costs carried by the company in this process, not limited to staff time, administration and sundry expenses, and fees associated with due diligence.
"A change of occupancy is not simply a case of filling in a form - we must treat it in the same way we would an end of tenancy and effectively enter a new legal agreement for the remaining and new tenants.