• Welcome to IAAOWe are the International Association of Assessing Officers and we offer education, technical standards, consulting services, and many other resources to the assessing community.
  • 20th Annual GIS/CAMA ConferenceThis annual conference and exhibition is jointly presented by URISA and the International Association of Assessing Officers and is designed to foster collaboration and integration of data, technology and functionality.
  •  2016 Conference Keynote SpeakerDon't miss Gene Kranz, legendary NASA Flight Control Director who led the effort to save Apollo 13! He'll explain why Failure Is Not An Option.
  • Continuing EducationIAAO courses include a comprehensive curriculum on appraisal procedures and assessment administration offered throughout the world. Our courses, workshops, and forums range in length from one to five days and we also offer a variety of online courses.


Achieve professional goals with IAAO Education & Designations

IAAO fosters innovation and excellence through our internationally recognized designation program, top notch courses, and easily accessible online education. Success has never been more attainable.


Find what you are looking for In the IAAO Library

Looking for an IAAO Resource? Find all of our internationally recognized publications, standards, and periodicals here. Members have full access to the IAAO Library as well as AssessorNET, our member networking tool.

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Event Calendar

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  • February 17 2016
    Assessor Vs. Zillow Showdown Webinar 02/17/2016 Yavapai County Assessor Pam Pearsall has kept an eye on the growing popularity of real estate website Zillow.com in recent years. With Zillow having recently acquired Trulia.com it is hard to deny the impact Zillow will have on the national real estate market in coming years. It is under these circumstances that Assessor Pearsall wanted to gain some perspective of Zillow's relative value estimate accuracy when compared with her annual 2016 tax year updated homes values. Assessor Pearsall wanted to answer the question: "What is the potential for public use of Zillow estimates for and against us?" The results were revealing. Add to Calendar
  • February 22 2016
    20th Annual GIS/CAMA Technologies Conference 02/22/2016 The conference is jointly presented by URISA and IAAO and is designed to foster collaboration and integration of data, technology and functionality. Add to Calendar
  • June 2 2016
    Preparation and Trial Seminar 06/02/2016 The two-day training seminar is for attorneys, assessors, and appraisal personnel who want to be better prepared for appeals that progress to court hearings. Add to Calendar