Trees, shrubs, bushes, and other vegetation can be the subject of neighbor disputes. If you are not able to resolve an issue by talking to your neighbor, the law may provide some relief.

For example, if your neighbor’s tree extends onto your property and blocks your view, blocks sunlight, sheds pollen, acorns, leaves, or other foliage—or otherwise interferes with your use and enjoyment of your property—it may constitute a nuisance and you may be able to get help (relief) from the civil court system.

In some states you may have the right to trim a tree to the property line or boundary. But in some states an overhanging tree may have acquired the right to be there through an easement by prescription or prescriptive easement, for example.

But if a tree is on or near the property line and the tree and its root structure extends onto both properties, you generally may not remove it or kill it without your neighbor’s consent. And some municipalities place restrictions on the removal of trees.

Trees with dead or decaying branches can also create liability for a landowner if they fall and cause personal injuries to guests, neighbors, or members of the public—or cause property damage to a neighboring property or motor vehicle, for example.

Laws regarding trees, shrubs, bushes, and other vegetation on neighboring properties may vary from state to state and may be included in a state’s statutes or in its court opinions—also known as common law or case law. And there may be municipal ordinances (laws enacted by local governments in cities and towns) that govern these issues.

In California, disputes over trees and vegetation between neighbors are governed by state law and local ordinances. If a neighbor's tree overhangs onto your property, you generally have the right to trim the branches up to the property line. However, you cannot trim the tree in a way that would cause unnecessary harm or kill the tree. California law recognizes the concept of 'nuisance' in relation to trees that interfere with a neighbor's enjoyment of their property, such as blocking views or sunlight, or shedding debris. In such cases, a civil court may provide relief. It's important to note that some California cities have specific ordinances protecting certain trees, and permits may be required before trimming or removing trees, especially those designated as 'heritage' or 'protected.' Regarding liability, a tree owner in California may be held responsible if a tree causes damage or injury due to negligence, such as failing to maintain or remove a hazardous tree. It's advisable to consult with an attorney to understand the specific regulations and legal options available in your locality.