Realtors, property managers, building owners, and attorneys need to know the basics of Fire Code compliance. They are responsible to ensure that tenants and clients are provided with Code compliant properties. Building, fire, health, and zoning regulations must be thoroughly researched prior to any multi-family or mixed use occupancy changing hands. "THERE IS NO SUCH THING AS AN IN-LAW APARTMENT " If it has a kitchen and bathroom it's a living unit. I've seen so many building owners that were sold non-compliant properties because the proper research was not done by the people who were responsible for protecting their interest. These owners are now stuck with thousands of dollars worth of Fire Code compliance, only because some did not do their jobs. The answer is to become informed about these issues and be ready to address them before buildings change hands. It affects the selling price and the conditions of the property transaction. There are always resources available to assist you in these matters. Reach out and seek the information. You'll be doing your tenants and clients a great service.