so let me get this straight,
there are 2 cars that the builders drive
they park them outside your gaff during the day while they are doing their tipper lorry business
when they get back, they park the lorry where ther cars are and the fook off for the night
?
if you have the balls to do it, unbolt their PTO
there will be a trail of oil from your front door mind

is there any time that you can park you motor there then?
or can you not just ask them not to park their big fook off tipper truck outside your house?
or, do like most of us have said in the past (no, not kill their kids and tell them "thats what you get for possibly fucking with me") and buy a snotter of a car with a eyars ticket and park it up where they normally do so they can't?