- Parcels
- 400,777
- County FIPS
- 29189
- Snapshot
- October 30, 2026
What property data is available for St. Louis County?
| Dataset | St. Louis County |
|---|---|
| Parcel boundaries | 400,777 parcels |
| Tax assessor records | 394,130 records (98% of parcels) |
| Owner name and mailing address | 90% of assessor records |
| Market or assessed value | 100% of assessor records |
| Year built | 94% of assessor records |
| Last sale date | 0% of assessor records |
| Building permits | 532,094 permits since 2016, latest September 15, 2026 |
| Roofing permits | 586 |
| Zoning | 1 zoning jurisdiction |
| Buildable-area screens | Yes |
| Historic designations | 209 |
| Adopted building codes | 4 jurisdictions |
| Hail history (radar) | Yes, every county in the contiguous US |
How do I query St. Louis County property data?
Bulk-search every parcel in the county with `search_properties` using `state: "MO"` and `county: "189"` (the county FIPS code 29189), or look up one address with `search_parcels`. Check any single property for free with `check_availability`.
{
"name": "count_properties",
"arguments": { "state": "MO", "county": "189" }
}Frequently asked questions
How do I find who owns a property in St. Louis County?
Search the address on the St. Louis County assessor's website, or query Parceled's `search_parcels` for owner name and mailing address. See how to find a property owner by address.