There was growth in all 16 major centres.
Dunedin had the strongest annual growth.
The Tenancy Tribunal said the price hike was unreasonable.
Ray White said it could charge $100 more rent than a private landlord.
A hidden camera revealed the contractor entered her room.
The proposed changes aim to make renting property more secure.
An Upper Hutt mum is struggling to feed her family after $500 weekly rent.
An expert says the Government needs to do more.
They say the balance is tipping in favour of tenants.