Over 600 people have joined a waiting list for just 41 affordable homes proposed for Ballymun.
That's despite them being at least 18 months away and not having planning permission yet.
The O'Cualann Housing co-op has already built just under 50 affordable homes in Poppintree.
Four-bedroom houses were priced at €219,000 but applicants had to be from the Dublin northwest area and earn less than €59,000 a year.
Head of the co-op, Hugh Brennan, says he can't yet say how much the proposed new homes will cost but they should be "at least 25% to 30% lower than market rate" and will have similar eligibility criteria.
On top of the 41 homes for sale, there'll be six social housing units and 21 affordable-rental properties.