An RPZ landlord may be able to reset the rent to market level after substantial renovation, but the work must significantly change the nature of the accommodation, not simply involve repainting, replacing fixtures or routine repairs. Examples may include major structural works, changes to the layout or number of rooms, or substantial improvements to the dwelling’s energy performance. The landlord must meet the relevant notice and information requirements, including notifying the tenant and the RTB where required. Whether the exemption applies ultimately depends on the facts and can be assessed through the RTB process or by a solicitor.