Chris Pine at Conflict with His Neighbor Over Ficus Timber

Chris Pine‘s in a court battle with his neighbor over the roots he’s put down in L.A. — roots that are allegedly infiltrating this woman’s backyard … and we mean that quite literally.

TMZ has obtained legal docs that show Chris ensnared in a showdown with someone named Helen Yu — who lives next door to him in the Hollywood Hills … and who’s brought action against him for what she claims is destruction of her property due to his trees.

Long story short … Yu alleges Chris has planted at least a dozen ficus trees at the border of his own home, but because these pesky plants have out-of-control roots … she claims they’ve started to spread and encroach on her own parcel, and it’s ruining her yard.

In the docs, she says she ended up suing Chris back in 2022 — a lawsuit that flew under the radar — but they quickly went into mediation, where they’ve been trying to work out a resolution to this behind closed doors.

Obviously, that isn’t working out … Helen says Chris seemed willing to settle this privately, until he ended up hurling another stone … allegedly claiming Helen’s fence was encroaching on his side of the property line.