Civil Code 841: who pays for the fence the tree broke
By Michael Schuck, ISA Certified Arborist WE-15750A, ISA Certified Urban Forest Professional WE-15750AF · Last reviewed 2026-10-25
The text
§ 841(b)(1). Adjoining landowners shall share equally in the responsibility for maintaining the boundaries and monuments between them.
(2) Adjoining landowners are presumed to share an equal benefit from any fence dividing their properties and, unless otherwise agreed to by the parties in a written agreement, shall be presumed to be equally responsible for the reasonable costs of construction, maintenance, or necessary replacement of the fence.
Section 841 was rewritten by the Good Neighbor Fence Act of 2013 (AB 1404), which added the notice requirement and the rebuttal factors.
The notice (841(b)(2))
At least 30 days before work begins, written notice to each affected owner containing: notice of the presumption of equal responsibility; a description of the problem with the shared fence; the proposed solution; the estimated construction or maintenance cost; the proposed cost allocation; and the proposed timeline. Skip the notice and the presumption does not help you collect.
Rebutting the presumption (841(b)(3))
An owner can overcome the equal split by showing by a preponderance of the evidence that imposing equal responsibility would be unjust, considering: whether the fence's financial burden is substantially disproportionate to its benefit to that owner; whether the cost would exceed the difference in property value the fence creates; whether the cost is unreasonable given the owner's financial circumstances; and any other equitable factor. A tree that one owner planted, owned and allowed to push the fence over is the "other equitable factor" courts see most.
Where trees come in
- Cause has to be shown. Fences lean and rot on their own. A claim that roots did it needs the roots exposed at the footing, photographed, measured and identified to the tree. That is what the Dispute Assessment Report does.
- Ownership has to be right. If the trunk is on the line, the tree is co-owned under Civil Code 834 and the tree-damage argument cuts both ways.
- The fix has to survive the tree. Rebuilding the fence on the same footing over the same root puts you back here in five years. The report specifies a footing relocation, a bridged post, or directed root pruning so the new fence lasts.
- Small claims. Fence disputes under $12,500 go to small claims with the notice, the report and the bids as evidence.
Sources
- Civil Code § 841, as amended by AB 1404 (2013).
Questions people ask
Does my neighbor have to pay half for a new fence?
Presumptively, yes, if the fence divides the properties and you give 30 days' written notice with the required contents. The neighbor can rebut the presumption by showing an equal split would be unjust on the facts.
Their tree destroyed the fence. Do they pay all of it?
That is the most common rebuttal argument and it can succeed, but only if you can show their tree's roots or limbs caused the damage, as opposed to age, rot or soil movement. An arborist's attribution is the evidence.
What has to be in the notice?
Notice of the presumed shared responsibility, a description of the problem, the proposed solution, the estimated cost, the proposed cost allocation, and the proposed timeline. Thirty days before work begins.
Does 841 apply to a fence that is not on the line?
The presumption applies to a fence dividing the properties. A fence entirely inside one lot is that owner's; the tree questions are then nuisance and self-help, not 841.
Can the neighbor make me pay for a fence I don't want?
The presumption is of equal benefit and equal cost; a neighbor can rebut it by showing the fence confers little benefit on them, that it is unnecessary, or that the cost is unreasonable. Tree damage caused by the other owner's tree is one more ground.
When you need a lawyer instead of (or as well as) an arborist
Call a California attorney first if a lawsuit has already been filed, if the damage is over the small claims limit and the other side will not negotiate, or if the dispute is really about where the property line is. We work alongside attorneys every week and the report is written to be used in that setting, but we do not give legal advice and we do not opine on property lines. How we work with attorneys →