Interactive Maps

To see how property assessments in your community compare with other communities throughout the nation, please zoom into your community using the map below for a visual comparison of your city, county, or state. 


Dot Density Map of Over and Under Assessed Properties

In this map, properties are classified as over or under-assessed relative to the county median assessment ratio. For instance, if the median property in a county was assessed at 100% of its sale price, any property assessed at more than 100% of its sale price would be classified as over-assessed and any property assessed at less than 100% of its sale price would be classified as under-assessed. Blue dots represent under-assessed properties and red dots represent over-assessed properties. Each dot represents 20 properties. The dots are randomly scattered within the census tract in which the properties are located. The map is designed to show spatial clustering of over- and under-assessed properties. Zooming in to small geographies can reveal localized patterns within and across neighborhoods. The map does NOT show the exact location of any individual property. 

County Level Regressivity Statistics

Select a county from the list to see a map of tract-level assessment levels.

Note: Sale ratios are normalized relative to the county’s median ratio in the year of sale. Counties where data is available for only one census tract are excluded from this visualization. In most U.S. counties, properties are assessed by a single office or under a uniform set of rules. However, in some places, notably New York State outside New York City, properties in a single county may be assessed under more than one set of rules, which can produce variations that are not necessarily inequitable. In California, taxable value is based on actual sale prices. The inequities there are products not of inaccurate assessment but of differences in the tenure of ownership.