The number of Irish 25 to 29 year olds living at home has almost doubled in the last decade.
New Eurostat Data gives a figure of 68 percent, making Ireland an outlier within Western Europe.
Gill Hines, Education and Parenting Consultant, says children are biologically ready to leave the home between the ages of 18 and 20.
She also highlights the negative impact it can have on young people:
"It's very difficult for parents and children to live together, where they see each other as equal adults where one doesn't have the power or one doesn't have the say.
"That has a cost psychologically in terms of how young people see themselves."