NAI Houston is a merger of two major Houston based commercial real estate firms, The Lewis Companies and Marnitz, Farris & Co. It is a full-service commercial real estate firm. Located in Texas, the company's areas of product specialty include office, land, industrial, retail as well as multifamily. Its services include user representation, project marketing, corporate services, development services, construction management, furniture coordination, telecom/data coordination, move coordination, facility management, investment sales, acquisitions and a variety of consulting services.