My neighbor smokes on the balcony and the smell enters my apartment. Legal remedies in Korea?

What the Law Says

Under Article 214 of the Civil Act, property owners and occupants must exercise their rights without unreasonably infringing upon others’ rights or lawful interests. Courts have consistently held that persistent, intrusive cigarette smoke entering a neighboring unit—especially when it causes health discomfort, odor contamination, or aggravates preexisting conditions—constitutes an unlawful nuisance (Supreme Court Decision 2015Da21487, Feb. 11, 2016). The Building Management Act (Act No. 11522) and its Enforcement Decree further require residents to avoid acts that disturb communal peace (Art. 31), and explicitly designate smoking in common areas—including balconies adjacent to shared ventilation systems—as a prohibited activity where it adversely affects others (Enforcement Decree Art. 29-2, added 2022). While private balcony use is not per se illegal, courts assess reasonableness by considering frequency, duration, wind patterns, building design, and mitigation efforts—e.g., whether the smoker uses air purifiers or smokes away from shared walls.

Practical Steps

Begin by documenting evidence: record dates/times of smoke intrusion, take timestamped photos/videos showing airflow paths (e.g., open windows, shared ducts), and retain medical records if health effects (e.g., asthma exacerbation) occur. Submit a written request—via certified mail—to both the neighbor and the apartment’s management office, citing Building Management Act Art. 31 and requesting remedial action. If unresolved within 14 days, file for voluntary mediation at the local District Legal Affairs Office (법무사 사무소) or the Korea Consumer Agency (for rental disputes); this is free and non-binding but creates evidentiary value. Should mediation fail, file a civil petition for injunction (금지청구) and/or damages at the competent District Court, attaching all documentation. Note: Small claims (under ₩30 million) may be expedited under the Small Claims Procedure Act, with hearings typically within 30 days.

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