Councillors at Dún Laoghaire-Rathdown have voted to reduce Local Property Tax in the area by 15%.
Councillors voted by 29 to 7 for the maximum reduction allowed for the fourth year in a row.
The motion was supported by Fine Gael, Fianna Fáil, Sinn Féin, the Green Party as well as People Before Profit.
The county council had argued that a full 15% reduction would result in a loss of income to the council amounting to €7.8 million.
The council’s Director of Finance and Risk Management Helena Cunningham said such a reduction would put severe pressure on the budget for next year.
She said each 1% increase in the tax would give the council an additional €518,000 for its budget.
The Labour Party had proposed a compromise of a 10% reduction in the LPT.
Meanwhile, Fingal County Council became the first of the Dublin local authorities to vote not to adjust the Local Property Tax by the full 15%.
Fingal voted to impose a 10% reduction, a saving of just short of €2 million.
Labour Councillor Duncan Smith said his party group had obtained a commitment from the chief executive that the money would be ring-fenced and invested back into services.