Two redbrick Victorian homes in Clontarf have been bought by the Dublin Region Homeless Executive.
Almost €2 million has been spent on the buildings.
The properties on St. Lawrence Road were purchased to provide accommodation for 13 homeless families who are living in hotels.
The buildings, which were used as a former B&B, were bought for €1.8 million.
The move has raised concerns among residents, suggesting that the properties are not suitable for housing families.
Reps from the homeless agency held a meeting with locals and explained the house rules for those who will live in the properties.
One of the rules is that residents are discouraged from requesting money from people.
Tony McNally from the local residents association says 13 families is too many people for one property. He was also asked if he's worried the street could turn into a social housing road:
"Very much so and it has the potential to do so. And the reason why I say that is that at the moment (St Lawrence Road has) a retirement home for nuns. It's quite a substantial building. I suspect that would be typically the type of building DCC would purchase for the purpose of delivering their (housing) policy. The problem is they've told us - and they've told us quite categorically - that there's no cap. So there's nothing to stop this from happening over and over again."
Campaigner Father Peter McVerry says the majority of homeless families in 2017 do not have addiction problems or issues with anti social behaviour.
"These are just families like any other family. They only have one problem; they don't have the money to pay for their own accommodation. Some of them have one parent working. Some of them were very involved in their previous communities.... I believe they can make a positive contribution to the area if the local residents will meet them, welcome them and help them to integrate."