The dairy farming family that scored a $30 million windfall from the sale of the so-called Leppington Triangle secured a big victory against Revenue NSW in the Supreme Court.
Brothers Tony and Ron Perich have agreed to remove a large dam from their property and pay a $425,000 penalty.
The potential deal comes after the billionaire family's multimillion-dollar land sale.
A new intersection at the entrance to the Perich family's farm is seen as another example of government overlooking small landowners near Sydney's second airport.
Deputy Prime Minister Michael McCormack believes the $33 million taxpayers spent buying part of a dairy farm near the western Sydney airport was a bargain.
The $30 million windfall for the wealthy landowners mirrors a $21.5 million payment they received 20 years ago in a similar deal.
A British rail expert who advised the NSW government says there's a "very short window in which to place" levies on developments and rezoned land.
The number of billionaires that will be created will be "embarrassing",unless the government learns this expensive lesson,a Liberal MP has warned