Oakland County, MI parcel and infrastructure data API
Korzy has about 490,000 parcel records for Oakland County, Michigan, with source updates through November 2026. Nearly every record carries values, land use and building size. In and around the county the API also maps about 15 data-center projects (10 operating); 1 port with reported cargo; and 4 power plants with about 150 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.
Parcel coverage in Oakland County
About 490,000 parcel records with boundaries, situs addresses and parcel numbers, with the latest source update from November 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:
| Field | Coverage | Share |
|---|---|---|
| Situs address | Most · 94% | |
| Owner name | Not published | |
| Assessed or market value | Nearly all · 99% | |
| Year built | Not published | |
| Building size | Nearly all · 99% | |
| Last sale | Not published | |
| Land use | Nearly all · 99% | |
| Zoning | Not published |
Oakland County records do not include owner names. See pricing for credit costs.
Infrastructure in and around Oakland County
Power plants
4 operable plants with about 150 MW of nameplate capacity; largest by capacity: natural gas, oil, other fuels.
Within 50 km: /v1/lookup section power; details: /v1/records/{id}
Substations and transmission
About 80 in-service substations, 4 rated 230 kV or higher.
About 500 miles of transmission lines: about 290 mi at 100–161 kV; about 160 mi at 345 kV.
Water and sewer service
Service areas of about 100 community water systems cover about 49% of the county.
Sewer service areas of about 10 systems cover about 54%.
At an address or point: /v1/lookup section utilities
Data-center projects
About 15 tracked projects: 10 operating, 1 permitted, 3 proposed, 1 status not reported. Reported planned capacity: about 130 MW.
Within 10 km: /v1/lookup section datacenters
Grid capacity data
1 utility-published grid capacity layer cover parts of Oakland County, including load headroom.
Nearby records: /v1/lookup section grid
Flood zones and wetlands
Special flood hazard areas cover about 7% of the county on the current federal flood maps, published October 2026.
Mapped wetlands cover about 9%.
At an address or point: /v1/lookup section environment
Rail, ports and freight
- About 130 miles of active rail, about 80 of it main line
- About 85 miles of national freight network highway
- 1 port area with reported cargo tonnage
- 1 intermodal rail terminal
Within 25 km: /v1/lookup section logistics
Example requests for Oakland 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 3331 W BIG BEAVER RD, TROY, 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":"3331 W BIG BEAVER RD, TROY, MI","sections":["datacenters"]}' \
https://api.korzy.co/v1/lookupPython
import os
import requests
response = requests.post(
"https://api.korzy.co/v1/lookup",
json={"address": "3331 W BIG BEAVER RD, TROY, 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": -83.19359167856788,
"latitude": 42.5594634,
"address": "3331 W BIG BEAVER RD, TROY",
"match_type": "exact"
},
"parcels": {
"records": [
{
"id": "26125-0c12ccf7ebf343797ce2",
"korzy_id": "26125-0c12ccf7ebf343797ce2",
"parcelid": "2030202004",
"parceladdr": "3331 W BIG BEAVER RD",
"parcelcity": "TROY",
"situs_zip": "48084",
"statefp": "26",
"geoid": "26125",
"longitude": -83.19359167856788,
"latitude": 42.5594634,
"land_use_code": "201",
"bldgsqft": 0,
"totalvalue": 2362780,
"assessed_value_usd": 2435260,
"updated": "2026-11-03"
}
],
"truncated": false
},
"sections": {
"datacenters": {
"status": "ok",
"data": {
"radius_km": 10,
"projects": [
{
"id": "datacenter:dc_f0d0fd990f4b97708450",
"project_id": "dc_f0d0fd990f4b97708450",
"name": "Cogent Troy Data Center (3331 W. Big Beaver Rd)",
"operator": "Cogent Communications",
"status": "operating",
"state": "MI",
"city": "Troy",
"address": "3331 W. Big Beaver Road",
"longitude": -83.193147,
"latitude": 42.5594738,
"location_precision": "approximate",
"source_count": 1,
"source_date": "2026-10-07",
"mapped": true,
"distance_km": 0.036439129141047584
},
{
"id": "datacenter:dc_20c681b2c9f91cb1dd6a",
"project_id": "dc_20c681b2c9f91cb1dd6a",
"name": "Liberty Center One",
"status": "unknown",
"state": "MI",
"city": "Royal Oak",
"address": "4815 Delemere Avenue",
"longitude": -83.17758135328558,
"latitude": 42.53349555,
"location_precision": "footprint",
"source_count": 1,
"source_date": "2026-05-18T19:39:30Z",
"mapped": true,
"distance_km": 3.171414798132506
},
{
"id": "datacenter:dc_1c00bb2aa1c5891cf91a",
"project_id": "dc_1c00bb2aa1c5891cf91a",
"name": "Liberty Center One Royal Oak Data Center",
"operator": "Liberty Center One",
"status": "operating",
"state": "MI",
"city": "Royal Oak",
"address": "4815 Delemere Ave",
"longitude": -83.177393,
"latitude": 42.533508,
"location_precision": "approximate",
"source_count": 1,
"source_date": "2026-09-14",
"mapped": true,
"distance_km": 3.1765692170573536
}
],
"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 value and sale fields
/v1/enrich returns the fields you choose for up to 25 parcels per request; here the parcel 26125-0c12ccf7ebf343797ce2. 1 credit.
curl --fail-with-body -sS \
-H "Authorization: Bearer $KORZY_API_KEY" \
-H "Content-Type: application/json" \
-d '{"items":[{"korzy_id":"26125-0c12ccf7ebf343797ce2"}],"fields":["identity","value","sale"]}' \
https://api.korzy.co/v1/enrich3. 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 $KORZY_API_KEY" \
https://api.korzy.co/v1/records/26125-0c12ccf7ebf343797ce2JavaScript
const response = await fetch(`https://api.korzy.co/v1/records/${encodeURIComponent("26125-0c12ccf7ebf343797ce2")}`, {
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);Oakland County data questions
- How many parcels in Oakland County include building size?
- About 490,000 of about 490,000 parcel records (99%) include building size.
- Does the Korzy API return owner names for Oakland County parcels?
- Oakland County parcel records do not include owner names. Values, land use and building facts are returned where the county publishes them.
- How many data-center projects are in Oakland County?
- Korzy tracks about 15 data-center projects in Oakland County: 10 operating, 3 proposed and 1 permitted. A /v1/lookup with the datacenters section lists projects within 10 km of any address or point.
- How much power generation is in Oakland County?
- 4 operable power plants in Oakland County total about 150 MW of nameplate capacity, mainly natural gas, oil and other fuels.
- Which water systems serve Oakland County?
- Service areas of about 100 community water systems cover about 49% of Oakland County, and sewer service areas cover about 54%. A /v1/lookup with the utilities section returns the water and sewer matches at an address or point.
More featured counties
- Macomb County, MIBorders Oakland County · about 380,000 parcels
- Wayne County, MIBorders Oakland County · about 380,000 parcels
- Kent County, MIabout 270,000 parcels
Build on Oakland 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.