About HTAA The members of our Association share many common goals, including About Us Piclegislative representation at the local, state and national levels. As a Member of HTAA, you'll have the opportunity to develop relationships with other colleagues, find potential business partners and clients and make new friends. Our 200+ membership count consists of rental housing owners, builders, developers, property management firms and product / service suppliers. The owner / management company members represent more than17,000 rental housing units in the McLennan, Falls, Limestone, Bosque, Hamilton and Coryell counties.