Neighbor Disputes: Trees, Fences & Encroachments in Pennsylvania

Most neighbor disputes never become lawsuits. But when they do, the legal issues are surprisingly complex. Pennsylvania law on trees, fences, and encroachments draws on a mix of statutes, common law, and local ordinances. Understanding the rules can help you resolve a dispute before it escalates; or recognize when legal action is your only option.

Trees

Overhanging Branches and Encroaching Roots

Under Pennsylvania common law, you have the right to trim branches and roots that cross your property line , but only to the property line. You may not enter your neighbor’s property to trim, and you may not damage the tree itself. If trimming to the property line would kill the tree, you should proceed cautiously and consult an arborist.

You generally cannot sue your neighbor simply for having a tree whose branches hang over your property. The self-help remedy (trimming to the line) is your primary recourse. However, if a neighbor’s tree causes actual damage to your property (roots cracking your foundation, branches damaging your roof during a storm) you may have a negligence claim if the neighbor knew (or should have known) the tree was hazardous and failed to act.

Fallen Trees and Storm Damage

When a healthy tree falls due to a storm, the tree owner is generally not liable for damage to the neighbor’s property. An act of nature is not negligence. However, if the tree was visibly dead, diseased, or structurally compromised, and the owner knew or should have known, they may be liable for failing to address a known hazard.

Fences

No General “Fence Law”

Pennsylvania does not have a thorough fence statute for residential properties. There is no state law requiring you to build a fence, share the cost of a fence with your neighbor, or maintain a fence at a particular height. Fence requirements come from local municipal ordinances and HOA/deed restrictions. Check your municipality’s code for specific rules on height, setback, materials, and permits.

Spite Fences

A fence built with no useful purpose other than to annoy or harm a neighbor may be actionable as a spite fence . Pennsylvania courts have recognized claims based on structures erected solely out of malice. The key question is whether the fence serves any legitimate purpose (privacy, security, aesthetics) or exists purely to block a neighbor’s view, light, or air.

Encroachments

An encroachment occurs when a structure (a building, shed, driveway, retaining wall, or fence) extends across the property line onto a neighbor’s land. Under Pennsylvania law:

• A property owner can demand removal of an encroaching structure through an action in ejectment or trespass
• If the encroachment is minor and in good faith, the court may order payment of damages rather than removal
• Long-standing encroachments may ripen into ownership through adverse possession (21 years of open, notorious, continuous, and hostile possession under 42 Pa.C.S. § 5530, or 10 years under § 5527.1 for qualifying properties) or a consentable line theory

This is why a title search and survey at the time of purchase are so important. An encroachment discovered years later is much harder and more expensive to resolve.

Practical Steps Before Legal Action

• Get a survey. Many disputes evaporate once the actual property line is established by a licensed surveyor
• Document everything. Photographs with dates, written correspondence (not just verbal conversations), and any damage
• Check local ordinances. Your municipality may have specific rules that resolve the dispute without litigation
• Talk to your neighbor. Most people are reasonable when approached calmly with facts. A demand letter from an attorney can be effective when a conversation hasn’t worked

Statutory content on this page was last verified against Pennsylvania statutes (68 Pa.C.S.; 21 P.S.): February 2026 . If you are reading this significantly after that date, confirm key provisions with current statute text or contact our office.