Galway City Council's planned move to Crown Square in Mervue could end up costing up to €80m.
That was the stark claim made at a meeting of city councillors at city hall this week.
It was initially agreed to purchase the building for €45m - but two years later, concerns are growing over the cost of further development and fitout.
The meeting also heard claims that there's "deep unease" among staff over the move.
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Fianna Fáil Councillor John Connolly spoke to David Nevin after the meeting.
