The International Association of Assessing Officers (IAAO) is the internationally recognized leader and preeminent source for innovation, education, and research in property appraisal, assessment administration, and property tax policy.

We serve the profession by developing the standards, techniques, and procedures used to maintain accurate property values; the research programs to remain preeminent; the education programs to teach others; the programs for professional designation of assessment personnel to recognize excellence; and the technical assistance and research programs to be the international source for property appraisal, assessment administration, and property tax policy.   More detail...