Residents in north London are starting a legal challenge against their council over its plans to increase permit parking charges.
Campaigners in East Finchley in the London Borough of Barnet say they are prepared to pay their own legal fees in order to take their case to court.
From next April an annual resident's permit will rise from £40 to £100 and a daily visitor's permit from £1 to £4.
Barnet Council said it had to bring prices in line with other boroughs.
A spokesperson said: "We have held down the prices of residents' parking for several years, but circumstances dictate that we have to bring them in line with other London boroughs."
Resident Ray Bussel said: "We are absolutely determined to put our hands in our own pockets to fight the challenge... whatever the cost. It's unjust."
Another resident Anna Martin said: "The reason we are prepared to put our hands in our pockets is because after years of living under a Tory government we are consistently being ignored.
"It gets to the point where you don't want to put up with it any more."
Barnet council has to be stopped, she said.
The council has to make £54m of savings over the next three years.
About 150 residents attended a cabinet meeting on Monday in which parking permit charges were discussed.