The Boundary by Acquiescence theory provides that a long-standing marker indicating where property owners understand a boundary to be located becomes the actual boundary, even if a survey places it elsewhere.
The Boundary Line Agreement (BL AGR) provides a procedure for County review whenever a point or line determining the boundary between two or more parcels of real property cannot be identified from the existing public record, monuments, and landmarks or is in dispute. RCW 58.04.
A boundary line agreement is a legally binding document that sets clear boundaries between neighboring properties, providing certainty and preventing conflicts.
If the property line goes through the middle of the tree trunk, the tree is jointly owned by you and your neighbor. Since you jointly own such boundary trees, you are allowed to trim them. But if your trimming kills the tree or you cut down the tree entirely, you could be liable for timber trespass.
Interference with public servant. obstructs, hinders, conceals, or prevents the lawful service of any civil or criminal legal process by a sheriff, constable, deputy sheriff, deputy constable, peace officer, private investigator, or any other person authorized to serve legal process.
Fencing in interior side or rear yards may not exceed eight (8) feet in height, subject to the visual obstruction requirements established below. C. Allowed Materials. Fences shall be made of high-quality, durable materials that require minimal maintenance.
The four major types of boundary disputes are operational, allocational, locational, and definitional.