In general, commercial properties are not meant for residential use. However, there might be exceptions in cases when a business property has a mixed-use zoning that permits there to be residential units on the land. To protect the safety and wellbeing of the tenants under such circumstances, the relevant permits and approvals must be secured, and construction and safety codes must be followed. To find out if using a commercial property for residential purposes is legal, it is imperative to contact the local authorities.