If you are thinking of purchasing a property as an investment, you will need to consider if the property has been rented previously. If the property has previously been rented, you will need to consider how much rent the property was achieving. Some houses may fall into a rent pressure zone, which places a limit on any rent increase as it cannot exceed general inflation rates.
Rent Pressure Zones (RPZs) are areas located in parts of the country where rents are highest and rising, and where households have the greatest difficulty finding affordable accommodation. See link below to search rent pressure zones and work out what rent can be achieved from the property.