Latest: Micheál Martin attacks Taoiseach over 'complacency' on 'shocking' rent crisis

Latest: The Taoiseach says introducing tougher laws on renting could cause even more of a black economy in the housing market.

Update 6.35pm: Opposition leader Micheál Martin has said a new report on housing rents makes for "very dismal and depressing reading."

He said that over a number of years the rental increase in Dublin has been "shocking" and warned it is having a "huge impact on people."