# New Castle County, DE property data

> New Castle County, DE parcel data: 203,934 parcels with building permits, zoning, historic designations, building codes, via API, MCP server and vector tiles.

Source: https://www.parceled.ai/coverage/delaware/new-castle-county  
Publisher: Parceled (https://www.parceled.ai)  
Updated: 2026-10-30

Parceled covers 203,934 parcels in New Castle County, DE, with building permits, zoning, historic designations, building codes and hail history available through one API and MCP server.

- **Parcels:** 203,934
- **County FIPS:** 10003
- **Snapshot:** October 30, 2026

## What property data is available for New Castle County?

| Dataset | New Castle County |
| --- | --- |
| Parcel boundaries | 203,934 parcels |
| Tax assessor records | Not yet |
| Owner name and mailing address | Not yet |
| Market or assessed value | Not yet |
| Year built | Not yet |
| Last sale date | Not yet |
| Building permits | 168,616 permits since 2016, latest October 28, 2026 |
| Roofing permits | Not yet |
| Zoning | 13 zoning jurisdictions |
| Buildable-area screens | Yes |
| Historic designations | 408 |
| Adopted building codes | 3 jurisdictions |
| Hail history (radar) | Yes, every county in the contiguous US |

## How do I query New Castle County property data?

Bulk-search every parcel in the county with `search_properties` using `state: "DE"` and `county: "003"` (the county FIPS code 10003), or look up one address with `search_parcels`. Check any single property for free with `check_availability`.

```json
{
  "name": "count_properties",
  "arguments": { "state": "DE", "county": "003" }
}
```

## Frequently asked questions

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

Search the address on the New Castle 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).