Rents cannot be raised more than six monthly.
With a fixed-term lease, if the owner is going to increase the rent during the term of the lease it must be in the contract as a condition of the lease.
It can either refer to an increase of a dollar amount, such as $10, or alternatively it can stipulate a method of increase, such as the Consumer Price Index. Only one method per rent review is permitted. The owner must provide a 60 day notice period of the new rental price.
If a tenant is on a periodic lease, the owner must give a 60 day notice period of the new rental price provided that the rent had not been increased in the previous six months.
If sending the notice by post, it is advisable for owners to add six days on top of the mandated 60 day notice period to allow for postage delivery.