A nuisance is an unreasonable interference with someone's right to use and enjoy their own property.
In a lawsuit, nuisance is a legal claim that arises when a defendant's activity—such as noise, odor, or pollution—substantially and unreasonably harms the plaintiff's property or personal comfort. It can be a private nuisance (affecting one or a few people) or a public nuisance (affecting the community's common rights). The claim typically requires proving that the interference is both significant and avoidable, not merely a trivial annoyance.
If you bring a nuisance claim, you must show the other party's conduct unreasonably disrupted your life or property, which can lead to an injunction (court order to stop the activity) or money damages. Procedurally, the court will balance the severity of the harm against the social utility of the offending activity, so you need clear evidence of the interference.
Many people think any unwanted noise or smell counts as a nuisance, but courts only step in when the interference is substantial and would offend a reasonable person's ordinary sensibilities. Temporary or minor annoyances, such as a single loud party, usually do not qualify.
Get the actual rule
This page explains the concept. When it matters to your case, read the rule that governs it in your court — we hold Texas, federal and Washington court rules word for word, and every state's official resources are on the state pages. If someone cites a case at you, check that it exists first.
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General explanation, not legal advice, and not specific to any state — procedures and deadlines vary by jurisdiction and court. If you can get a lawyer or free legal aid, do: every real option.