Evictions for Nuisance, Unauthorized Occupants, and Lease Violations in California

Court Process & Enforcement
November 17, 2025
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Behavior-based evictions are more complex than nonpayment cases, but they are absolutely winnable with strong documentation and the correct notices.

Nuisance Evictions

Nuisance means the tenant’s behavior significantly affects neighbors or the property. Judges look for repeated conduct, warnings, and credible documentation. One-time incidents rarely justify eviction unless severe.

Unauthorized Occupants

When non-tenants move in without permission, it undermines safety, insurance coverage, and the lease itself. Documenting frequent overnight stays, patterns of occupancy, and vehicle presence helps build your case.

Major Lease Violations

These include property damage, illegal activity, unauthorized businesses, or repeated rule violations. Courts want to see a clear connection between the behavior and the lease terms.

Court Expectations

Judges favor clear, written notices that describe the conduct precisely. They want to see that the tenant was warned when required and that the landlord acted reasonably at every step.