Historically, a Rent Pressure Zone (RPZ) was a designated area where rent increases were subject to a statutory limit, while landlords in non-RPZ areas generally had more scope to set or increase rents, subject to notice and other tenancy rules. From 1 March 2026, nationwide rent-control rules have made the geographic distinction less important, although the applicable limit and whether rent may be reset can depend on the tenancy’s start date and statutory exceptions. Check the latest guidance from the RTB or a solicitor before relying on an RPZ map or calculating a rent increase.