Temporary accommodation for the families that survived the Glenamuck Road fire is to be provided at a Dun Laoghaire Rathdown Council-owned car park, beside Ballyogan Works Depot.
The council says the site has its own private acces road, which is also in council ownership.
Talks with residents of Rockville Drive, where it was initially planned to put the families, failed to reach agreement and they would have had nowhere to live from this weekend.
A spokesman says the site is not ideal, as it has no access to basic services, but staff are commited to working around the clock to make it ready for occupation by the weekend.
The Southside Travellers Action Group is welcoming the breakthrough and says it hopes that the families will be in a position to move in by this weekend.