A neighbor’s tree roots pushing into your yard, lawn, or pipes is a common headache, and the instinct is to cut them at the property line. You usually can trim roots that cross onto your land — but there is an important catch: if your cutting kills or destabilizes the tree, you can be held liable for its value, sometimes doubled or tripled under timber-trespass laws. The rule courts apply is “reasonable care.”
Here is what you are allowed to do, where the liability line sits, and how to deal with invasive roots safely.
Your Right to Trim Roots
Like overhanging branches, roots that grow onto your property can generally be cut back to the boundary line, at your own expense, without the neighbor’s permission. You may not enter their land or cut roots on their side.
The Catch: Don’t Kill or Destabilize the Tree
Your right to trim is limited by a duty of reasonable care. If you cut so aggressively that the tree dies, becomes diseased, or falls, you can be liable for the loss — even though the roots were on your side. Severing major structural roots near the trunk is the classic way homeowners cross that line.
| Action | Usually OK? |
|---|---|
| Trim small roots at the property line | Yes (reasonable care) |
| Cut major roots that kill the tree | No — you may be liable |
| Enter neighbor’s land to cut | No — trespass |
| Install a root barrier on your side | Often the safest fix |
Potential Damages If the Tree Dies
If you are found to have unreasonably killed the tree, damages can be based on its replacement cost or the drop in the neighbor’s property value — and many states allow double or treble damages for harming someone else’s tree. A mature specimen can be worth thousands, so caution pays. For context on how tree value is calculated, see how tree-damage liability works.
How to Deal With Invasive Roots Safely
Have a certified arborist assess which roots can be cut without endangering the tree, prune conservatively, and consider a root barrier to redirect future growth. Talking with your neighbor first — see resolving tree disputes — also reduces the risk of a claim. For ownership questions, see trees on the property line.
Frequently Asked Questions
Can I cut my neighbor’s tree roots on my side of the fence?
Generally yes, you may trim roots back to the property line — but only with reasonable care that does not kill or destabilize the tree.
Am I liable if cutting roots kills my neighbor’s tree?
You can be. If the cutting was unreasonable and the tree dies, you may owe its value, potentially doubled or tripled under state law.
What is the safest way to stop invasive roots?
Have an arborist prune conservatively and install a root barrier on your side rather than severing large structural roots.
This article is general information, not legal advice; root and tree laws vary by state.
Jack Turner
