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Wayne County, MI parcel and infrastructure data API

Korzy has about 380,000 parcel records for Wayne County, Michigan, with source updates through October 2026. Nearly every record carries owner names; 92% include land use and 74% include values. In and around the county the API also maps about 10 data-center projects (5 operating); about 490 miles of active rail; and about 10 power plants with about 1,400 MW of capacity, led by natural gas. Look up any parcel by address or coordinates, then check nearby data-center projects, utilities and grid context at the same point.

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Parcel coverage in Wayne County

About 380,000 parcel records with boundaries, situs addresses and parcel numbers, with the latest source update from October 2026. Each record has a stable korzy_id you can store and look up again with /v1/records/{id}. Share of records with each field:

FieldCoverageShare
Situs addressNearly all · 100%
Owner nameNearly all · 99%
Assessed or market valueMany · 74%
Year builtMany · 61%
Building sizeMany · 61%
Last saleMany · 74%
Land useMost · 92%
ZoningNot published

Owner name and mailing address are returned by /v1/enrich with the owner group, at 2 credits per parcel instead of 1 credit. 99% of Wayne County records carry an owner name.

Infrastructure in and around Wayne County

Power plants

About 10 operable plants with about 1,400 MW of nameplate capacity; largest by capacity: natural gas, battery and pumped storage, other fuels. Proposed generators add about 240 MW.

Within 50 km: /v1/lookup section power; details: /v1/records/{id}

Substations and transmission

About 130 in-service substations, about 20 rated 230 kV or higher.

About 540 miles of transmission lines: about 320 mi at 100–161 kV; about 65 mi at 220–287 kV; about 110 mi at 345 kV.

Water and sewer service

Service areas of about 55 community water systems cover about 76% of the county.

Sewer service areas of 7 systems cover about 84%.

At an address or point: /v1/lookup section utilities

Data-center projects

About 10 tracked projects: 5 operating, 2 proposed, 4 status not reported. Reported planned capacity: about 1,100 MW.

Within 10 km: /v1/lookup section datacenters

Grid capacity data

1 utility-published grid capacity layer cover parts of Wayne County, including load headroom.

Nearby records: /v1/lookup section grid

Flood zones and wetlands

Special flood hazard areas cover about 9% of the county on the current federal flood maps, published October 2026.

Mapped wetlands cover about 5%.

At an address or point: /v1/lookup section environment

Rail, ports and freight

  • About 490 miles of active rail, about 240 of it main line
  • About 150 miles of national freight network highway
  • 2 port areas with reported cargo tonnage
  • 4 intermodal rail terminals

Within 25 km: /v1/lookup section logistics

Example requests for Wayne County

The lookup response is a real production response, trimmed to the main fields. Every request needs an API key with api:read; see authentication and credits and limits.

1. Find a parcel and nearby data-center projects

/v1/lookup matches 12737 LINWOOD, DETROIT, MI and returns the parcel's korzy_id and record, plus the data-center projects within 10 km, nearest first. 2 credits.

curl --fail-with-body -sS \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"address":"12737 LINWOOD, DETROIT, MI","sections":["datacenters"]}' \
  https://api.korzy.co/v1/lookup
Python
import os
import requests

response = requests.post(
    "https://api.korzy.co/v1/lookup",
    json={"address": "12737 LINWOOD, DETROIT, MI", "sections": ["datacenters"]},
    headers={"Authorization": f"Bearer {os.environ['KORZY_API_KEY']}"},
    timeout=60,
)
response.raise_for_status()
body = response.json()
parcel = body["parcels"]["records"][0]
print(parcel["korzy_id"], body["sections"]["datacenters"]["status"])
Production response (trimmed)
{
  "location": {
    "longitude": -83.1202486589235,
    "latitude": 42.389873699999995,
    "address": "12737 LINWOOD, DETROIT",
    "match_type": "exact"
  },
  "parcels": {
    "records": [
      {
        "id": "26163-2af90053ab8bf9da9536",
        "korzy_id": "26163-2af90053ab8bf9da9536",
        "parcelid": "10007588",
        "parceladdr": "12737 LINWOOD",
        "parcelcity": "DETROIT",
        "situs_zip": "48238",
        "statefp": "26",
        "geoid": "26163",
        "longitude": -83.1202486589235,
        "latitude": 42.389873699999995,
        "usedesc": "MIXED USE-OFFICE",
        "yearbuilt": 1925,
        "bldgsqft": 6012,
        "taxacres": 0.199,
        "totalvalue": 0,
        "saledate": "2017-12-28",
        "saleamt": 25000,
        "updated": "2026-10-30"
      }
    ],
    "truncated": false
  },
  "sections": {
    "datacenters": {
      "status": "ok",
      "data": {
        "radius_km": 10,
        "projects": [
          {
            "id": "datacenter:dc_6abb8ef2c94b93876669",
            "project_id": "dc_6abb8ef2c94b93876669",
            "name": "Unnamed data center",
            "operator": "Verizon Wireless",
            "status": "unknown",
            "state": "MI",
            "city": "Detroit",
            "address": "2436 Bagley Street",
            "longitude": -83.07697676797723,
            "latitude": 42.3262376,
            "location_precision": "footprint",
            "source_count": 2,
            "source_date": "2026-02-09",
            "mapped": true,
            "distance_km": 7.9190876312008
          },
          {
            "id": "datacenter:dc_5dd99f889760a042b769",
            "project_id": "dc_5dd99f889760a042b769",
            "name": "Unnamed data center",
            "operator": "Quicken Loans",
            "status": "unknown",
            "state": "MI",
            "city": "Detroit",
            "address": "1401 Rosa Parks Boulevard",
            "longitude": -83.06971683362536,
            "latitude": 42.32616885,
            "location_precision": "footprint",
            "source_count": 2,
            "source_date": "2026-02-09",
            "mapped": true,
            "distance_km": 8.210848805809322
          },
          {
            "id": "datacenter:dc_5f933bec697ecfd2df76",
            "project_id": "dc_5f933bec697ecfd2df76",
            "name": "Cogent Detroit Data Center (1320 3rd St)",
            "operator": "Cogent Communications",
            "status": "operating",
            "state": "MI",
            "city": "Detroit",
            "address": "1320 3rd St",
            "longitude": -83.055773,
            "latitude": 42.330743,
            "location_precision": "approximate",
            "source_count": 1,
            "source_date": "2026-10-07",
            "mapped": true,
            "distance_km": 8.443688163482578
          }
        ],
        "truncated": false,
        "note": "Straight-line distance to the reported project point; inspect location_precision. Projects merge supported source matches, not every nearby building. Approximate locations do not identify a parcel. Reported IT load, facility power, planned capacity and estimates remain separate source claims. No record or unknown status does not establish absence or inactivity."
      },
      "provenance": [
        {
          "dataset": "datacenters",
          "as_of": "2026-11-02",
          "data_version": "20261102T123021962884Z"
        }
      ]
    }
  },
  "credits": {
    "charged": 2,
    "refunded": 0
  }
}

2. Add owner and sale fields

/v1/enrich returns the fields you choose for up to 25 parcels per request; here the parcel 26163-2af90053ab8bf9da9536, with the owner group. 2 credits.

curl --fail-with-body -sS \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"items":[{"korzy_id":"26163-2af90053ab8bf9da9536"}],"fields":["identity","sale","owner"]}' \
  https://api.korzy.co/v1/enrich

3. Fetch the record again by ID

/v1/records/{id} returns the stored parcel's full record, without owner fields. 1 credit.

curl --fail-with-body -sS \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  https://api.korzy.co/v1/records/26163-2af90053ab8bf9da9536
JavaScript
const response = await fetch(`https://api.korzy.co/v1/records/${encodeURIComponent("26163-2af90053ab8bf9da9536")}`, {
  headers: { Authorization: `Bearer ${process.env.KORZY_API_KEY}` },
});
if (!response.ok) throw new Error(`Korzy API ${response.status}`);
const { record } = await response.json();
console.log(record.parceladdr, record.usedesc);

Wayne County data questions

How many parcels in Wayne County include year built?
About 230,000 of about 380,000 parcel records (61%) include year built.
Does the Korzy API return owner names for Wayne County parcels?
Yes. 99% of Wayne County parcel records carry an owner name. Ask /v1/enrich for the owner group; each parcel then costs 2 credits instead of 1 credit. Lookups and records never include owner fields.
How many data-center projects are in Wayne County?
Korzy tracks about 10 data-center projects in Wayne County: 5 operating, 4 status not reported and 2 proposed. A /v1/lookup with the datacenters section lists projects within 10 km of any address or point.
How much power generation is in Wayne County?
About 10 operable power plants in Wayne County total about 1,400 MW of nameplate capacity, mainly natural gas, battery and pumped storage and other fuels.
Which water systems serve Wayne County?
Service areas of about 55 community water systems cover about 76% of Wayne County, and sewer service areas cover about 84%. A /v1/lookup with the utilities section returns the water and sewer matches at an address or point.

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Build on Wayne County parcel data

Lookups, enrichment and records work the same in every county Korzy covers. Credits are shared across parcels, utilities, environment, logistics, power, grid, data-center and terrain sections.

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