Licensing For Consumers For Businesses Programs & Services Divisions Contact Us Search Department of Consumer Protection Search the current Agency with a Keyword Filtered Topic Search Apartment Listing Service These are regulated by the Department of Consumer Protection. See CGS Chapter 734a, Section 42-103c. Defined as “Any person who, in exchange for a fee, permits a customer to inspect or otherwise utilize a listing of apartments for rent.” No person may engage in business as an apartment listing service without first obtaining a certificate of registration from the Commissioner of Consumer Protection, except that a person holding a valid real estate brokers license in this state shall not be required to obtain a certificate. Call (860) 713-6150 for information and an application.