⚡ 10-Second Rule
You can't use your property in a way that seriously and unfairly wrecks a neighbor's enjoyment of theirs.
🧒 ELI-10 Scene
Nadia's neighbor Gus starts two hobbies the same week. First, he kicks soccer balls over the fence into Nadia's garden. Balls physically land on her property. That's like barging in — a different wrong called trespass. Second, Gus drums in his garage from midnight to dawn, every night. Nothing of his ever touches Nadia's land. But she can't sleep, can't think, can't enjoy her own home. That's this wrong. Nobody entered her property. Her ability to live there peacefully was still wrecked.
⚖️ Actual Rule
Paraphrasing Restatement (Second) of Torts § 821D, a private nuisance is a nontrespassory invasion of another's interest in the private use and enjoyment of land. Under § 822 (paraphrased), the defendant is liable if the interference is substantial and either (a) intentional and unreasonable, or (b) the result of negligent, reckless, or abnormally dangerous conduct. "Substantial" means offensive or annoying to a person of ordinary sensibilities — a hypersensitive plaintiff or use does not qualify. Paraphrasing § 826, an intentional interference is unreasonable when the gravity of the harm outweighs the utility of the defendant's conduct. Public nuisance is distinct: paraphrasing § 821B, it is an unreasonable interference with a right common to the general public, such as public health, safety, or use of a public road; under § 821C (paraphrased), a private plaintiff may recover for public nuisance only by showing special injury — harm different in kind, not merely in degree, from that suffered by the public at large. Distinguish trespass, which protects exclusive possession against physical invasion; nuisance protects use and enjoyment and requires no physical entry. On remedies, courts award damages or balance the equities before enjoining a valuable activity, sometimes granting permanent damages in place of an injunction, as in Boomer v. Atlantic Cement Co., 26 N.Y.2d 219 (1970). Paraphrasing § 840D, the fact that the plaintiff "came to the nuisance" by arriving after it began is a relevant factor but not, by itself, a bar to recovery.
ELI-10 translation: seriously and unfairly spoiling how a neighbor lives on their land creates a claim, even without touching it.
🔍 Ask These Questions
- Did anything physically enter the plaintiff's land? (People or objects crossing the line is trespass; noise and smells are nuisance.)
- Is the interference substantial to an ordinary person? (Would a normal neighbor be seriously bothered, not just a super-sensitive one?)
- Is it unreasonable — does the harm outweigh the activity's usefulness? (Weigh how bad the bother is against how valuable the activity is.)
- Is the harmed right private or public? (One neighbor's sleep is private; a blocked public road belongs to everyone.)
- If public, does the plaintiff have special injury different in kind? (A private person needs a harm different from everyone else's, not just bigger.)
- What remedy fits — damages, or an injunction after balancing? (Courts compare the hardships, and moving in next to the noise is only one factor.)
⚠️ Bar Trap
Exam language: Examiners present a defendant whose operation predates the plaintiff's arrival and offer "coming to the nuisance" as a complete defense, often paired with a distractor that the defendant "exercised reasonable care." Priority in time is merely one factor in the unreasonableness balance, and due care does not defeat liability for an intentional, unreasonable interference — a defendant who continues conduct knowing it invades the neighbor's interest acts intentionally.
ELI-10: "I was here first" helps, but it isn't a magic shield. And being careful doesn't matter once you know your noise or smoke keeps wrecking the neighbor's home.
🧪 Question
In 2015, Dara opened a pottery studio with a large wood-fired kiln on rural land, firing it three days each week. In 2022, Hollis bought the adjoining parcel, aware of the kiln, and built a house. Smoke and ash from the firings regularly settle over Hollis's yard, forcing him to keep his windows shut and preventing outdoor use of the property several days a week; the conditions would seriously disturb any ordinary resident. Dara operates the kiln with industry-standard equipment and care, and she knows the smoke reaches Hollis's land. Hollis sued Dara for private nuisance. What is the likely result?
(A) Dara prevails, because Hollis came to the nuisance by building next to a known, existing kiln. (B) Dara prevails, because she operates the kiln with reasonable, industry-standard care. (C) Hollis prevails, if the interference is substantial and the gravity of his harm outweighs the utility of Dara's conduct; his later arrival is only one factor in that balance. (D) Hollis prevails, because any smoke crossing a boundary line is an actionable interference with land.
Answer: (C). The recurring smoke substantially interferes with use and enjoyment, and Dara's continuing the firings knowing of the invasion makes the interference intentional; liability turns on the harm-versus-utility balance. Coming to the nuisance weighs in Dara's favor but is not an absolute defense.
💡 Why the Wrong Answers Are Wrong
- (A) converts a single balancing factor into a complete defense; later arrival alone does not forfeit the claim.
- (B) treats due care as dispositive, but reasonable care is no defense to an intentional interference that is unreasonable on balance.
- (D) overstates the tort; the interference must be both substantial and unreasonable, not merely present.
- ELI-10: The misconception is thinking "I was here first and I was careful" always wins. The court still weighs the neighbor's harm against the activity's value.
