Rents are set to rise by between 22 and 26 per cent over the next 2 and a half years.
That's the prediction emerging from a new analysis of CSO figures, by the real estate company Savills.
Its researchers analysed changes in the percentage of vacant rental properties in the market.
They say the amount of vacancies can help predict how much rents will rise.
Savills' Director of Research Dr John McCartney says the forecasts are based on a number of scenarios
