City of Madison Assessor's Office

International Association of Assessing Officers – Ratio Study Report

The City Assessor's Office contracted with the International Association of Assessing Officers (IAAO) to undertake a Ratio Study of Sales for 2018 and 2019. We are pleased to report that the study revealed a quality reappraisal effort (Madison is in a constant revaluation cycle or interim market update), with both residential and commercial properties appraised within acceptable standards of appraisal level and equity. Practically speaking, this means that an external expert has objectively determined the residential and commercial classes of property are being assessed accurately without inappropriate shifts of the tax burden. We are proud of our work and these results!

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We are committed to providing better access to information and hope this web site will assist you. Browse this site for basic information about:

If you do not find the information you need on this site, please contact the Assessor’s Office by phone or email. We will reply as quickly as possible.

If you feel a mistake has been made in valuing your property, we encourage you to contact our office. We can review the property characteristics and appraisal methods used to determine your most recent assessed value. We have a knowledgeable and hardworking staff to assist you.

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