Planning permission in Sandyford, south Dublin will not be granted for any major developments in the near future.
Landowners have been told that until the sewage infrastructure is improved, developments of more than two residential units - or the equivalent in commercial space - will not be given the green light.
Dun Laoghaire Rathdown County Council took the decision after a study identified serious drainage problems in the area.
Council manager Owen Keegan said: "It would not be appropriate to grant permission for any further significant development in the area until the foul drainage infrastructure requirements are determined and the council is satisfied that the required measures can be implemented."
Sewage pipes of an inadequate capacity were found between the Sandyford/Stillorgan areas and the West Pier pumping station.
(VB/JM)
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