Free Good Neighbor Fence letter generator
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What California's Good Neighbor Fence Act actually says
California Civil Code section 841 says neighbors are presumed to share equally in the reasonable cost of building, maintaining, or replacing a fence on their shared boundary, unless they've agreed otherwise in writing. If you plan to spend money on that fence and want your neighbor to share it, you must give 30 days' written notice first. The law says the notice must include:
- the presumption that you share the reasonable costs equally,
- a description of the problem with the fence,
- your proposed solution,
- the estimated cost,
- your proposed way of splitting it, and
- your proposed timeline.
The letter above covers all six. The presumption isn't absolute: a court can order a smaller share, or none, if equal sharing would be unjust. Courts look at things like whether the cost is out of proportion to the neighbor's benefit, real financial hardship, and whether the cost comes from one owner's personal style choices (for example, an upgrade from wood to a custom metal fence).
Tips that keep it neighborly
- Talk first, then send the letter. A friendly chat plus a letter that follows up on it lands far better than a surprise.
- Attach real bids. One or two written quotes make "reasonable cost" easy to see.
- Offer to pay for your upgrades. If you want a taller fence or nicer material, offering to cover the difference avoids most disputes.
- Keep a copy and a record of when you sent it (certified mail or email with a reply).
- Know where the line is. If you're not sure where the boundary runs, a licensed land surveyor can mark it before anyone builds.
- Get it in writing. If you agree on something other than 50/50, put it in a short signed note.
Source
California Civil Code section 841 (official text; also on Justia). Checked October 15, 2026.
Town guides
Questions
Does my neighbor have to pay half of a new fence in California?
California Civil Code section 841 presumes neighbors share the reasonable cost of a shared boundary fence equally, unless they agreed otherwise in writing. A court can lower or remove a neighbor's share if equal sharing would be unjust.
How much notice do I have to give my neighbor?
30 days' written notice before you spend the money, describing the problem, your proposed fix, the estimated cost, the proposed split, and the timeline, and noting the equal-cost presumption.
Does the law cover my upgrade to a fancier fence?
Courts can consider whether costs come from one owner's personal aesthetic preferences. Offering to pay the difference for upgrades is the simplest way to avoid a dispute.
Is this legal advice?
No. It's a free letter tool based on the text of Civil Code section 841. For a dispute, talk to a California attorney or a local mediation program.