When Your Neighbor's Business Crosses the Line: Understanding Illegal Operations in California Living in California, especially in dense urban or suburban areas, often means close proximity to your neighbors. While many home-based businesses operate legally and harmoniously, there are times when a neighbor's commercial activity crosses the line, becoming an illegal operation that can significantly impact your quality of life and property value. If you find yourself in this frustrating situation, understanding your legal options in California is crucial. Identifying an Illegal Business Operation Not every home-based venture is illegal. Many small businesses, from freelance consulting to online retail, can operate legally from a residential property. The key distinction lies in adherence to local zoning laws, business licensing requirements, and whether the activity constitutes a nuisance. What typically makes a home-based business "illegal" in California? ...