# Custer County, MT property data

> Custer County, MT parcel data: 11,856 parcels with tax assessor records, historic designations, building codes, via API, MCP server and vector tiles.

Source: https://www.parceled.ai/coverage/montana/custer-county  
Publisher: Parceled (https://www.parceled.ai)  
Updated: 2026-10-30

Parceled covers 11,856 parcels in Custer County, MT, with tax assessor records, historic designations, building codes and hail history available through one API and MCP server. Tax assessor attributes are present for 100% of parcels (owner names on 100% of those records, year built on 0%).

- **Parcels:** 11,856
- **County FIPS:** 30017
- **Snapshot:** October 30, 2026

## What property data is available for Custer County?

| Dataset | Custer County |
| --- | --- |
| Parcel boundaries | 11,856 parcels |
| Tax assessor records | 11,859 records (100% of parcels) |
| Owner name and mailing address | 100% of assessor records |
| Market or assessed value | 100% of assessor records |
| Year built | 0% of assessor records |
| Last sale date | 0% of assessor records |
| Building permits | Not yet |
| Roofing permits | Not yet |
| Zoning | Not yet |
| Buildable-area screens | Yes |
| Historic designations | 18 |
| Adopted building codes | 1 jurisdiction |
| Hail history (radar) | Yes, every county in the contiguous US |

## How do I query Custer County property data?

Bulk-search every parcel in the county with `search_properties` using `state: "MT"` and `county: "017"` (the county FIPS code 30017), or look up one address with `search_parcels`. Check any single property for free with `check_availability`.

```json
{
  "name": "count_properties",
  "arguments": { "state": "MT", "county": "017" }
}
```

## Frequently asked questions

### How do I find who owns a property in Custer County?

Search the address on the Custer 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](https://www.parceled.ai/guides/how-to-find-property-owner-by-address).