Use the RTB’s official Rent Pressure Zone (RPZ) calculator or map and enter the property’s full address or Eircode. Check the result against the relevant RPZ designation and effective date, as boundaries and rules can change. An Eircode is a useful starting point, but the property’s exact address, tenancy date and any applicable exemption may also matter when assessing a rent increase. For help with a specific tenancy, contact the RTB or seek advice from a qualified solicitor.