Greece's coalition government on Saturday pushed through parliament a new property tax required under the country's international bailout obligations, but saw its majority dwindle in the process.
The bill, which critics have labelled a final blow to the recession-hit economy, was narrowly approved by a majority of 152 deputies in the 300-seat chamber.
One conservative MP, former minister Vyron Polydoras, voted against the bill and was expelled from his party's parliamentary group.
As a result, the coalition government's majority in parliament fell to 153 deputies.
The tax, which consolidates and replaces prior taxes on property, aims to raise some 2.65 billion euros ($3.6 billion dollars) next year according to the finance ministry.
The law includes exemptions and tax reductions for inhabitants of small islands and people with low incomes.
But unions and left-wing parties have attacked what they say is an over-taxation of real estate, in a country that has one of the highest property ownership rates in Europe, with more than 70 percent.
Main opposition leader Alexis Tsipras accused the government of carrying out a "heist" against homeowners and "smashing a dam... against despair" that private property had so far constituted for thousands of Greek families hit by austerity cuts elsewhere.
"You tax every inch of home yard and garden, and then come here and talk of growth," Tsipras said.
"This is a heist against property," he said.
On Friday, hundreds of Greek farmers protested in Athens against the tax, and hurled oranges at riot police stationed in front of the parliament building.
They brandished banners reading "No to the double taxation" and "Not one euro for the fields."
The new property law also levies tax on agricultural plots larger than 1,000 square metres (10,764 square feet).
Previously farmers were taxed only on their income.
Greece was first bailed out by the European Union, the International Monetary Fund and the European Central Bank for 110 billion euros in 2010.
When that failed to set it back on track, it obtained a second rescue in 2012 worth 130 billion euros plus a private sector debt write-off totalling more than 100 billion euros.