Apply California's "good neighbor" shared-fence-cost statute (Civil Code Section 841) to a boundary fence dispute or cost-sharing arrangement.

Steps

1. Pull the current text of California Civil Code Section 841 directly from the Legislature's site rather than a fencing-company summary, since the statute has been amended.
2. Confirm the statute's default presumption: adjoining landowners share equal responsibility for the reasonable costs of construction, maintenance, or necessary replacement of a shared boundary fence absent a written agreement otherwise.
3. Confirm the required 30-day prior written notice a landowner must give affected neighbors before incurring shared-fence costs, including the presumption, problem description, proposed solution, cost estimate, cost-sharing approach, and timeline.
4. Identify the statutory factors a party can use to rebut the equal-cost presumption (disproportionate financial burden relative to benefit, cost exceeding the resulting property value increase, undue financial hardship) if a dispute arises.
5. Advise clients that a signed written agreement between neighbors overrides the statutory default allocation, so document any negotiated cost split in writing.