Romania's bicameral parliament now has a total of 471 deputies.
"A unicameral parliament means that decisions will be taken easier and the legislature will become more efficient," the presidential press office quoted Basescu as saying in a press statement.
At the same time, the measure will allow to cut costs and reduce corruption as there will be fewer high-level politicians involved in abuse of power, Basescu added in the statement.
Basescu proposed to combine the referendum with the upcoming presidential elections in Romania on November 22.