It follows the purchase of 135 homes in Maynooth by an investment fund.
The government will have to act to prevent investment funds buying up entire estates of new build houses, according to the Tánaiste.
Legislation is being worked on to reserve a certain amount of new builds for first time buyers.
Round Hill Capital and its partner SFO Capital, have purchased 135 homes in Mullen Park in Maynooth, and 115 homes in a new Dublin estate.
Tánaiste Leo Varadkar has said the government will need to intervene to stop this happening:

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