Neighbor's Tree Fell on My House in Washington — Who Pays?

The default rule in Washington: when a tree falls, the property owner where it lands is the one whose insurance handles the damage. Even if the tree was rooted in your neighbor's yard, your homeowners policy is normally what pays to remove it from your roof and repair the structure. This surprises almost everyone. It feels unfair — and in a healthy-tree situation, it is technically 'unfair' in a legal sense too. It is just the way property insurance is written.

The exception — and this is the piece homeowners miss — is negligence. Under Washington case law (see Mustoe v. Ma and the broader duty-of-care line of cases), a landowner has a duty to inspect trees that could reasonably injure a neighbor and take action on known hazards. Where a neighbor knew or should have known a tree was dangerous and did nothing, the outcome can be different. This is general information, not legal advice — talk to an attorney about your situation and confirm coverage details with your insurer.

'Should have known' is the key phrase. A hidden internal defect that no reasonable homeowner would spot usually does not create liability — it is an act of God. But a tree with an obvious lean, dead canopy, mushrooms at the base, visible cracks, or a documented history of dropping limbs is a different story. The more visible the defect, the stronger your negligence case, and the more likely the neighbor's insurer will pay rather than fight.

This is why written notice matters more than almost anything else in a tree dispute. If you have a tree next door that looks dangerous, do not just mention it at the mailbox. Send a dated letter (or email you can print), describe the specific defects you can see, and keep a copy. If that tree fails a year later and hits your house, that letter is the evidence that converts 'act of God' into documented negligence. Homeowners who skip this step almost always end up eating their own deductible.

Fence and property line rules run on a parallel track. In Washington, you generally have the right to trim branches and roots from a neighbor's tree that cross onto your side — up to the property line, without harming the overall health of the tree. You cannot cross onto their property to do it, and you cannot cut down the tree itself. If trimming your side would kill the tree, you need the neighbor's consent or a credentialed consulting arborist's opinion that it can be done safely. Cutting into a neighbor's healthy tree without permission can expose you to a treble-damages claim under RCW 64.12.030 — Washington's timber trespass statute — which is one of the most punishing property laws in the state.

Renters and landlords: liability follows control. If a rental property has a dangerous tree, the landlord is normally the party on the hook because the landlord controls the property. Tenants who see a leaning tree over the driveway should notify the landlord in writing — same reason as above, so there is a paper trail when something fails.