Problem with neighbors preventing sale of lot?

Yes, you likely need to disclose the neighbor situation, and there's no standard expiration date on that obligation. Disclosure requirements in most states cover known material facts that could affect a buyer's decision. An aggressive neighbor who physically confronted a buyer and caused a deal to fall apart is a material fact. That said, disclosure doesn't have to be a death sentence for the sale. How you frame it matters. Work with your agent to disclose the incident factually and briefly without editorializing. Something along the lines of noting that a prior buyer reported a negative interaction with an adjacent property owner. Let the buyer draw their own conclusions and do their own due diligence. To improve your chances of selling, consider pricing the lot to account for the neighbor issue. A buyer who's getting a deal on the price may be more willing to tolerate a difficult neighbor. You could also explore whether the neighbor's behavior rises to the level of harassment or interference with your property rights, which might be worth discussing with an attorney. If there's a pattern of behavior that's preventing you from selling your property, you may have legal recourse.

I’m sorry to hear about the situation with your lot. While your agent is guiding you through this, it’s important to remember that disclosure laws vary by state, and you’re generally required to disclose any material facts that could affect a buyer’s decision or the property’s value. A neighbor altercation could be considered a material fact since it may impact the buyer’s enjoyment or safety. There typically isn’t a specific timeframe for disclosing neighbor-related issues, they should be disclosed as soon as they’re known or relevant. Because these situations can be legally complex, I strongly recommend seeking legal advice to ensure you’re fully compliant without discouraging potential buyers unnecessarily. Working closely with your agent and an attorney can help you create clear, honest disclosures and potentially provide context or solutions that ease buyer concerns. If you need, I can assist in connecting you with a trusted real estate attorney.

Neighbors cannot legally prevent the sale of a lot you own, but they can create friction through legitimate legal channels that slows the process or affects who will buy it. In North Carolina and across the Southeast, the most common mechanisms neighbors use are: challenging zoning variance or rezoning requests at public hearings if you are trying to change the use of the lot, filing objections to a subdivision or plat approval that requires county sign-off, and in some cases initiating boundary disputes or easement claims that cloud the title and make the property harder to convey cleanly. If you have a clear title, the lot is properly zoned for its intended sale use, and there are no legitimate easement or access disputes, your neighbors have no ability to stop the sale itself. They can make noise at zoning hearings and create reputational friction with prospective buyers who speak to them, but they cannot block a clean real estate transaction. Have a title search performed, confirm the zoning classification is appropriate for the lots marketed use, and consult a North Carolina real estate attorney if any neighbor has filed anything of record against the property. Addressing clouds on title before listing is far more efficient than discovering them after a buyer is under contract. Kevin Neely & Kaitlynd Robbins | K2 Sells

That is frustrating, As a realtor we need to present all material facts on a property i'm not sure a previous disagreement with a neighbor needs to be disclosed.

Seek legal advice.