U.S. City Open Data Census
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Data about assessed property values including location, assessed value, taxes owed, and owner. Many US cities raise a substantial percentage of annual revenue via property tax assessment. Transparent public access to property assessment data helps keep city tax assessors accountable, allowing property owners to see how their property has been assessed relative to other parcels and providing explanatory context for property taxes owed and/or helping to justify appeals to assessments perceived to be unfair. Property assessment data also helps the public keep property owners accountable. (More info)
| Question | Answer | Comment |
|---|---|---|
| Openly licensed | Yes | |
| Available in bulk | Yes | |
| Up-to-date | Yes | |
| Available free online | Yes | |
| Available free of charge | Yes | |
| In an open format | CSV, GeoJSON, JSON, KML, RDF, SHP, TSV, TXT, XLS, XML | |
| findable | 4 | |
| findable_steps | 1) Go to Detroit's open data portal data.detroitmi.gov; 2) Search "Assessment" from upper right | |
| licence_url | Public domain license | The Public Domain license is found in the metadata here: https://data.detroitmi.gov/d/dxgi-9s8s |
| Collected by government | Yes | |
| usability | 3 | |
| collector_name | City of Detroit Assessor's Office | |
| characteristics | Location (may be an address or parcel number), Land area, Property details (type, use, units, description, and/or built improvements, etc.), Assessed value, Property owner | This dataset does include Property details like year built, depth, frontage, total acreage, and a legal description. |
| location | https://data.detroitmi.gov/d/dxgi-9s8s - Property Points Ownership dataset / City of Detroit open data portal |
Good update with license reference.