How would a Europe-wide housing plan work?

Speaking today, European Commission President Ursula von der Leyen said that the EU will look to relax state-aid rules to increase the supply of affordable housing.

In her speech, she highlighted the number of EU countries experiencing housing crises, and said they will begin working on the first ever European Affordable Housing Plan.

But, how would a plan like this be implemented across such different countries with such different issues?

Joining Ciara Doherty to discuss is Senior Housing Lecturer at Technological University Dublin, Lorcan Sirr.