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Online Assessment and Property Tax Data

Division Phone Number: (734) 994-2663               Fax Number: (734) 997-1437
Location of Offices: 5th floor City Hall
Division Administrator (City Assessor): David Petrak, CMAE IV
Office Email address:

In excess of 50% of the revenue of the City of Ann Arbor comes from property taxes.  Property taxes are the product of millage (tax) rates and taxable values.  

The Assessing Division establishes Assessed and Taxable Values of all taxable property within the City.  To establish the Assessed Value of each real property in the City, the Assessing Division lists, inventories, inspects, analyzes sales and income data, calculates depreciated costs and appraises the value of each taxable property within the City.  To establish the Taxable Value of each property in the City, the Assessing Division monitors transfers of ownership to determine when the Taxable Value of a property becomes uncapped.  To establish the Taxable and Assessed Value of Personal Property, the Assessing Division identifies new business owners by performing street surveys, processes personal property statements, and audits the records and examines the personal property of a sampling of businesses.  Other duties of the Assessing Division includes administering the rescission and granting of homesteads, processing of divisions of land, maintaining digital mapping (GIS) of property lines and the write up of legal descriptions, reviewing and processing exemption applications, calculating Payments in Lieu of Taxes, establishing special assessment districts and apportioning the special assessment within that special assessment district, defending Assessed and Taxable Values before the Michigan Tax Tribunal and assisting other departments and divisions within the City with valuation, real estate and property taxation issues.

If you record any instrument of conveyance at the County Register of Deeds you are required by law to file a Property Transfer Affidavit within 45 days with the Assessor's Office.  If you fail to file a Property Transfer Affidavit you will be fined in accordance with Michigan Law 211.27a and 211.27b.

Frequently Asked Questions

How are property assessments, SEVs, and taxable values determined?  For an explanation, click here.How do I obtain information/data on properties?
Property assessment and tax data of the City of Ann Arbor, which is available for viewing by the public at City Hall, can now be viewed from the City’s web site.  To view the City’s property assessment and tax data, log on to the City’s web site by clicking below.   A window will open, which displays the City’s Online Privacy Policy.  Read the Privacy Policy and proceed to the bottom of the screen and click “Continue to Tax Assessment Data”.  Once inside you can search by different criteria including property address, and parcel ID.  It should be noted that instructions are located on some of the windows / pages by clicking “Click here for instructions”.  Such data as photo images, property sales data, residential floor area, year built, land area, property tax data (billed and paid), property ownership, homestead data, and various residential amenity data (i.e. bathroom count, fireplaces, etc) is available for viewing.  However, as the City Assessor’s Office is still working on the key encoding of some data, certain data is not yet available on the web site, such as commercial and industrial building data.  It is planned that all data will be available on the web within one year.  

Comments regarding specific property data may be e-mailed to: 

The City of Ann Arbor hopes that access to this data via the City’s web site will greatly enhance the City's means of providing quality service to the customers of the City of Ann Arbor.

Although, property assessment and tax data is now available on the web, basic information on a single property can still be obtained over the telephone.  In order to obtain more detailed information / data or information on multiple properties, one must visit either the City's web site or come into the Assessor's Office.

How do I change the name, address or escrow information on my real property? 

Click link to retrieve a Change Request Form. 

How to review and appeal your property assessment?
Click here.

When does the Board of Review Meet?
The Board of Review meets in March of each year to consider and hear Assessment and Taxable appeals, and poverty exemption appeals for the current year. Homestead exemption appeals are not handled in March. The March meetings are always the 3rd week of the month starting on Monday for a period of 4 days.  Click here to view dates & times for March meetings.

Although the Board of Review also meets in July and December, it can only consider "clerical errors", "mutual mistake of fact", and poverty exemption appeals that were not presented at the March Board of Review meeting. Additionally, Homestead Property Exemptions are also decided at these meetings. The July meeting is always the Tuesday following the 3rd Monday and the December meeting is always the Tuesday following the 2nd Monday.

How can I obtain Property Tax Forms?

Taxpayers can access the State Property Tax forms at State of Michigan website, click here. This link will have Real and Personal (Business) Property forms. Also, the Homeowner's Principal Residence Exemption Affidavit and Request to Rescind Homeowner's Principal Residence Exemption forms are available, click here



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