By Prerna Kapoor, CLHMS | REAL Brokerage | May 13, 2026
Quick answer: In Colorado, the tree belongs to whoever’s property the trunk sits on – but if branches or roots cross the property line, your neighbor has the right to trim them back to the boundary at their own expense. Knowing these rules before you cut anything can save you thousands in liability.
Who Owns the Tree? It Comes Down to the Trunk
This question comes up more than you’d think, especially in neighborhoods like Parker and Castle Pines where lots back up to open space or share mature cottonwood and pine trees along fencelines. Colorado follows the “trunk rule” – whoever’s land the trunk grows on owns the tree. If the trunk straddles the property line, both homeowners share ownership equally, and neither can remove it without the other’s consent.
I’ve seen buyers fall in love with a home because of a beautiful old oak in the backyard, only to realize during the survey that the trunk is technically 18 inches onto the neighbor’s side. That’s worth understanding before you close.
Your Right to Trim – and Its Limits
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Under Colorado common law, you have the right to trim branches and roots that cross onto your property, but only up to the property line. You can’t go onto your neighbor’s property to cut, and you can’t trim in a way that kills or seriously damages the tree. If the trimming causes the tree to die, you could be liable for the replacement cost – which for a mature shade tree in the Denver metro can run $5,000 to $15,000 depending on size and species.
A few practical things to keep in mind. Always get a property survey before you start cutting anything near the boundary. A fence line isn’t always the property line – I’ve worked with sellers in Highlands Ranch who discovered their fence was two feet inside their own property, not on the actual line. Also, some HOAs in planned communities have their own tree removal rules on top of the state and county regulations.
Fallen Trees and Storm Damage – Who Pays?
Colorado’s Front Range gets some serious weather. When a neighbor’s tree falls onto your property during a storm, the general rule is that your homeowner’s insurance covers the damage to your structures and your cleanup costs. The neighbor isn’t automatically liable unless the tree was visibly dead, diseased, or they’d been put on notice that it was a hazard and did nothing about it.
This is one of those areas where documentation matters. If you notice a neighbor’s tree looking sick or leaning dangerously, send them a written note (even an email works). That creates a paper trail. If you skip that step and the tree eventually falls, proving negligence gets much harder. Here’s what you should know about Colorado home insurance before you need to file a claim.
County and City Regulations You Should Check
Douglas County, Arapahoe County, and the City of Aurora each have their own rules about tree removal. In many jurisdictions, removing a tree over a certain diameter – often 6 inches measured at 4.5 feet above ground – requires a permit. Some cities like Castle Rock have specific protections for native species.
Parker’s municipal code, for example, regulates removal of significant trees on developed residential lots. You’ll want to check with your local planning department before scheduling any major removal. The fine for unauthorized removal can be steep – sometimes calculated as a multiple of the tree’s appraised value.
If you’re buying a home with large trees near the property line, consider these questions during your due diligence so there are no surprises after closing.
Resolving Disputes Before They Escalate
Most tree disputes between neighbors can be resolved with a conversation, but some do end up in court. Colorado is a “comparative fault” state, which means both parties’ actions get weighed. Small claims court handles cases up to $7,500, and many counties offer free or low-cost mediation services through organizations like the Colorado Office of Dispute Resolution.
Before it gets to that point, here’s what I usually recommend to my clients: take photos, get an arborist’s assessment in writing, and talk to your neighbor with a solution in mind rather than a complaint. Most people are reasonable when you approach it that way.
If you have questions about how tree or property line issues might affect a home you’re buying or selling, I’m always happy to talk it through. No pressure, just practical information.
Prerna Kapoor | REALTOR® | Luxury Home Specialist
REAL Brokerage | 720-949-5450 | info@prernakapoor.com
CLHMS • RENE • PSA • ABR | International Sterling Society Award Winner
Prerna specializes in residential real estate across Parker, Aurora, Lone Tree, Castle Pines,
Highlands Ranch, Cherry Creek, Greenwood Village, and Centennial. She speaks English, Japanese,
and Hindi.
