If a fence sits on the property line between you and a neighbor, California law has something to say about who pays to fix it. Here's what Civil Code §841 actually requires, in plain English — this is a general summary, not legal advice.
The short version
California law presumes that neighbors sharing a boundary fence benefit equally from it and share equally in the reasonable cost of building, maintaining, or repairing it, unless a written agreement says otherwise. Before starting work and billing a neighbor for their share, the law requires 30 days' advance written notice with specific information.
What Civil Code §841 says
Under California Civil Code §841 (opens in a new tab), adjoining landowners are presumed to share equal benefit from a boundary fence and are presumed responsible for equal shares of the reasonable costs of construction, maintenance, or necessary repair, unless they've agreed otherwise in writing. The presumption can be overcome with evidence — for example, if one neighbor's actions caused the damage.
The 30-day notice requirement
Before a neighbor can require you to share the cost of new construction or a repair, California law calls for at least 30 days' prior written notice. The notice generally needs to describe the problem with the shared fence, the proposed construction or repair, and a reasonable estimate of the cost, along with how the cost would be shared. The idea is that neither neighbor gets billed after the fact for work they never had a chance to weigh in on.
What "reasonable cost" means in practice
The law doesn't set a dollar figure — it points to what's reasonable for the type of fence involved. In practice, that usually means getting a written estimate from a contractor and sharing it with the neighbor before work starts, rather than one side picking a contractor, paying, and asking for reimbursement later. A shared, itemized estimate both neighbors can look at tends to head off disputes about what counts as "reasonable."
HOA rules vs. state law
In neighborhoods with an HOA — common in newer Brentwood subdivisions — the HOA's CC&Rs may add requirements on top of state law: approved fence styles, colors, materials, or a process for repairs on shared lines. State law governs cost-sharing between neighbors; the HOA can still have a say in what the finished fence looks like. Check your CC&Rs before starting a repair that touches a shared fence in an HOA community.
When a neighbor won't pay
- Start with a conversation. Most disagreements come from one neighbor assuming the other won't cooperate, before actually asking.
- Send the written notice. Putting the problem, the proposed repair, and the estimated cost in writing, with 30 days' notice, is what the law asks for, and it also creates a paper trail if things don't get resolved informally.
- Try mediation. Many counties and cities offer low-cost neighbor mediation services designed for exactly this kind of dispute.
- Small claims court. For amounts within the small claims limit, this is a common path when a neighbor refuses to pay their share after proper notice. An attorney can advise on anything beyond that.
A simple written notice should generally include
- A description of what's wrong with the current fence
- A description of the proposed construction or repair
- A reasonable, itemized cost estimate (ideally from a written contractor quote)
- The proposed cost-sharing arrangement
- The date the notice is given, so the 30-day period is clear
This is general information, not legal advice. For a dispute that isn't resolving informally, or for anything involving significant money, talk to a real estate or civil litigation attorney. If you're ready to move forward with a repair, see fence replacement for what a shared-fence job typically involves.
Frequently asked questions
Do I legally have to split the cost of my neighbor's fence repair?
For a true boundary fence, California law presumes both neighbors share the reasonable cost equally, absent a different written agreement. The presumption can be challenged with evidence, such as one neighbor's actions causing the damage.
What if my neighbor starts a repair without telling me first?
The law calls for 30 days' written notice with a description of the work and cost estimate before a neighbor can require you to share the expense. If that notice wasn't given, you have a stronger position to push back on being billed.
Does this apply to a fence that's entirely on my property?
No. Civil Code §841 addresses boundary fences that sit on or serve the shared property line. A fence entirely within one owner's property is that owner's responsibility.
Cost ranges and legal notes on this page are general information, not a quote or legal advice. Prices vary by job; get an estimate for your fence.