it certainly is if it devalues the neighbors properties by big bucks

clean it up. junk yards belong in the woods

WHAT? A messy yard somewhere on "Southern Street"? This probably inconveniences about 0.0001% of the people in Chester County. Why are you posting it here? Either man-up and tell your neighbor, or call the township. But no, you seem like the type that just vents on a website, then does nothing about it.