Hamden 2021 Property Assessment

The map below shows the assessed property value change for all properties in Hamden on the grand list. The unedited source data set used for this map is available here.

Blue points indicate a decrease in assessed property value and red points indicate an increase.

This project is part of Hamden Open Data, a constituent led initiative to increase transparency and facilitate access to information in Hamden, CT.


Method & Limitations

This map was created by geocoding each numbered address in the grand list using the Google Maps Geocoding API and a Python script. The total assessed delta for each property was determined by subtracting the new gross value from the old gross value. The locations were then mapped and visualized using Carto.

Some addresses fell outside of the bounds of the town limits due to inaccuracy or incompleteness of the source data.