A newly built rental home may qualify for an RPZ exemption where it meets the legal definition of a new dwelling and has not been let during the relevant previous period. An exemption may also apply where a property has been substantially changed, but the landlord must meet specific statutory conditions. The landlord should tell the tenant in writing why the rent is being set outside the RPZ rules and keep supporting evidence. Check the latest guidance on the RTB or gov.ie, as the rules and qualifying dates can change; any dispute is ultimately decided through the RTB process.