A Rent Pressure Zone (RPZ) is an area where specific legal limits apply to rent reviews, generally restricting how much and how often rent can increase. In a non-RPZ area, those RPZ-specific limits historically did not apply, although landlords still had to follow notice, timing and other tenancy rules. Rent-control legislation and area designations can change, so the rules may depend on when the tenancy began and the reason for the rent review. Check the RTB or gov.ie for the current position, or seek advice from a qualified solicitor if the increase is disputed.