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.
In Washington State, boundary trees are considered common property of the adjoining landowners. Any decisions regarding the removal or substantial trimming of these trees must be agreed upon by both parties. Unauthorized tree work can lead to legal action and potential compensation claims.
Under such an agreement, the parties acknowledge the true boundary line between the properties, and the encroaching owner releases any claim to the strip of land encroached upon. In return, the “encroached upon” owner allows the encroachment to continue for so long as he/she is not adversely affected.
California law recognizes the right of two adjoining landowners to agree on a specific line or marker to act as the property lines between the two parcels, notwithstanding the legal description in each parcel's deed.
You and your neighbour can create a 'boundary agreement' to record: the boundary between 2 properties. who's responsible for maintaining a hedge, wall, tree or fence between 2 properties.
§ 15.2-3106. Whenever any two or more localities wish to relocate or change the boundary line between them, the governing bodies of such localities may, by agreement, establish, relocate or change such boundary line between them. 1977, c. 277, § 15.1-1031.1; 1983, c.