Rent Pressure Zones are designed to limit rent increases for many existing tenancies, helping provide greater affordability and stability for renters. Their effect on housing supply is debated: some landlords and economists argue that restrictions may reduce incentives to offer or build rental properties, while others point to wider factors such as construction costs, planning delays, finance and tax. The impact can also differ between existing homes and newly built or newly rented properties, depending on the rules in force. For current information, check the Department of Housing’s official guidance and relevant RTB materials.