If you’ve ever asked yourself, “Can I cut tree roots on my property?”—you’re not alone. It’s a common concern for many property owners who notice large, wandering roots near their driveway, foundation, or garden beds. The short answer is yes, in many cases, you are allowed to cut tree roots that extend onto your property. But as with most things involving trees and property lines, the real question is should you?
Cutting the roots of a tree can have serious consequences for the tree’s health, your property, and even your relationship with neighbors. From potential damage to your home to possible legal issues, root pruning is a task best approached with care, knowledge, and—when needed—professional help.
Why Do Property Owners Want to Cut Tree Roots?
There are several reasons why you might want to cut or remove encroaching tree roots. Roots may lift concrete, crowd garden beds, invade sewer lines, or simply make yardwork more difficult. In some cases, roots from a neighbor’s tree may cross the property line, raising concerns about damage or unwanted spread.
While tree branches are usually what homeowners notice first, encroaching branches or roots can both create tension—especially when the tree sits on a neighbor’s property but the impact shows up on yours. And while common law generally allows you to trim the tree parts that cross onto your land, doing so without harming the healthy tree can be complicated.
What the Law Says About Tree Root Cutting
In Portland, Oregon, if a root is growing on private property, no permit is required to prune or remove it. However, if the tree is located in a city right-of-way—for example, in the planting strip between the sidewalk and street—you’ll need a root pruning permit from the city. These permits help ensure that tree health and public safety are preserved.
Before doing any digging, it’s a good idea to check whether the tree is considered a street tree. If so, you may be required to follow specific steps, such as hiring a tree service or obtaining a special permit from the city. Inexpensive Tree Care does offer applying for permits on behalf of our clients if requested.
No matter where the tree is located, you’ll also want to understand any local ordinances that apply in your neighborhood. Laws can vary between cities and even homeowner associations. When in doubt, it’s best to consult with a certified arborist who understands both tree biology and local law to resolve the issue.
Are Visible Tree Roots Always a Problem?
It’s easy to assume that visible or surface roots are a sign of poor tree maintenance, but that’s not always the case. Some trees naturally send roots closer to the surface, especially in compacted or shallow soils. Not all exposed roots are dangerous—but they can be unsightly, trip hazards, or vulnerable to damage from mowers and foot traffic.
If you’re seeing raised roots or patches of dry soil near a tree base, it doesn’t necessarily mean the tree is unhealthy. However, it may be worth investigating whether the roots are causing damage—or at risk of being damaged.
What Happens If You Cut Tree Roots Without a Plan?
Cutting roots may seem like a straightforward solution, but it can lead to more problems than it solves. Roots don’t just anchor the tree—they’re essential for absorbing water and nutrients. When you remove too many, or cut them too close to the trunk, the tree may go into decline.
Unplanned root cutting can cause:
- Structural instability, increasing the risk of the tree falling
- Reduced water intake, leading to yellowing or sparse leaves
- Vulnerability to disease or pests entering the wound
- Sudden decline in a previously healthy tree
If the tree sits on a neighbor’s property and your actions harm or remove the tree, you could also be held liable for damages—even if the roots were on your side of the property line.
When Is the Best Time to Prune Tree Roots?
Just like tree branches, roots are best pruned during the dormant season—usually late fall to early spring—when the tree is under less stress. Cutting roots during the peak growing season can shock the tree, especially if it’s already dealing with heat or drought.
Timing isn’t the only factor. You’ll want to prune no more than 15–20% of the root system at a time, and always stay at least a few feet away from the trunk. Roots close to the base are critical for stability, and cutting them could put the tree at risk of toppling.
Can You Cover Exposed Tree Roots?
If you’re not ready to cut or remove the tree roots, there are gentler options. In some cases, covering exposed roots with mulch can help regulate soil temperature, retain moisture, and reduce foot traffic over the area. However, you should never pile soil or mulch directly against the trunk, as this can cause rot and disease.
The key is to work with the tree, not against it. If roots are a consistent problem in a heavily trafficked area, you may want to consider creating a no-mow zone, using pavers to guide foot traffic, or seeking advice from a tree professional.
FAQs About Cutting Tree Roots
1. Can I cut a neighbor’s tree roots that are growing into my yard?
Yes, under common law, you generally have the right to trim roots that extend onto your property—but only if it doesn’t damage or destabilize the neighbor’s tree. Consult an arborist to assess the risk.
2. Do I need a permit to cut tree roots in Portland?
If the tree is on private property, no permit is needed. But if it’s a street tree or located in the public right-of-way, you’ll need a root pruning permit from the city.
3. What are signs that roots are damaging my property?
Cracked sidewalks, uneven soil, or shifting foundations may indicate that tree roots are interfering with structures. An arborist or contractor can help confirm the cause.
4. Will cutting roots kill the tree?
It depends on how many roots are cut, how close they are to the trunk, and the overall health of the tree. Cutting too much or too close can cause irreversible damage.
5. Should I hire a professional to prune tree roots?
Absolutely. A certified arborist can evaluate root systems, recommend safe pruning strategies, and help you comply with local ordinances and tree maintenance best practices.
Need Help with Tree Roots? Let’s Talk
Tree root issues can be frustrating—but they don’t have to be overwhelming. Whether you’re dealing with exposed roots, planning construction, or trying to handle a neighbor’s property encroachment, getting advice from a certified arborist is the smartest move.
At Inexpensive Tree Care, we have a certified arborist on staff who can answer your questions, assess your tree’s health, and help you make safe, responsible decisions about pruning or preserving roots.
Reach out today to schedule a site visit or get advice on your tree root concerns. We’re here to help you protect your trees, your property, and your peace of mind.