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This interactive mapping application provides access to the latest property data available from Washtenaw County. Other available layers include parcels, aerial photos, topography, schools, and natural features.

WashCoGIS has been updated (7/12/17)

WashCoGIS now uses HTML5 instead of Silverlight. URLs on this page have been updated. You will need to update any browser bookmarks you have. Right click the bookmark in your browser, go to Edit or Properties, and then copy and paste the perferred URL from below into the URL textbox  for that bookmark.

County Users:

Default Layer Theme:

Drains Layer Theme:

Parcel Map Layer Theme:

CVT Users:

Default Layer Theme:

Drains Layer Theme:

Parcel Map Layer Theme:


Learn how to use WashCoGIS with the training videos


Access to the WashCoGIS viewer requires a login. Your existing logins will work with the new HTML5 WashCoGIS.

If you have not already received credentials for entry into the site, please contact us at

Please remember that WashCoGIS is intended for use by employees of Washtenaw County and its cities, villages, and townships.  Do not distribute your user credentials to people outside of your organization.  Much of the same information on WashCoGIS is available on our public site, MapWashtenaw, so please refer the public and consultants there instead.

Are you using BS&A Assessing?

.NET Assessing

The steps to enable the Map It button are:

  1. Launch the Equalizer Application
  2. Go to Program Setup
  3. Go to Program Settings
  4. Go to General Settings
  5. In the Custom Mapping System URL textbox, copy and paste the following exactly as it appears below (note: this is all on one line)

County Users:<parcel>

CVT Users:<parcel>


The information provided through this mapping application is for informational purposes only and are provided without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability and fitness for a particular purpose. The map layers are compiled from a variety of sources and should not be used for site-specific decision making.  I understand that the credentials provided to me for accessing this site are not to be distributed to people outside of my city, village, or township.

***** I agree to these terms. Launch WashCoGIS *****

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