Hayden Design Associates, Inc., a commercial specifying interior design firm, was established in 1981 by Donna N. (Hayden) Keene, IIDA. Today, HDA has distinguished itself as one of the largest and most highly respected independent design firms in North Carolina. Each year, HDA plans and designs over 1,000,000 square feet of corporate, commercial, and institutional spaces. HDA's professional design staff specializes in five areas of commercial and institutional design.