From time to time the landlord may increase the rent on your property. This will usually happen after the end of the fixed term of the lease (the initial term that the lease is set up for, usually 6 or 12 months). Before the rent is increased the landlord must be given 60 days notice in writing. The notice must show you the new rental amount and the day the increase will take effect.

If you think a rent increase is too high you can negotiate with the landlord direct or through the agent, if they have one and you should explain why the rent increase is too high in a letter.

If the landlord agrees to a lower increase, ask them to put this in writing. 
Rent can only be increased during the fixed term if the lease has a term in it that shows increased amount method of calculating the increase and you must still be given 60 days notice.