Jefferson County, AL parcel and infrastructure data API
Korzy has about 330,000 parcel records for Jefferson County, Alabama, with source updates through November 2026. Nearly every record carries owner names and values; 91% include land use. In and around the county the API also maps 2 power plants with about 2,800 MW of capacity, led by coal; about 550 miles of active rail; and 5 data-center projects (1 operating and 1 under construction). 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 Jefferson County
About 330,000 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 | Nearly all · 99% | |
| Owner name | Nearly all · 96% | |
| Assessed or market value | Nearly all · 96% | |
| Year built | Not published | |
| Building size | Not published | |
| Last sale | Not published | |
| Land use | Most · 91% | |
| Zoning | Not published |
Owner name and mailing address are returned by /v1/enrich with the owner group, at 2 credits per parcel instead of 1 credit. 96% of Jefferson County records carry an owner name.
Infrastructure in and around Jefferson County
Power plants
2 operable plants with about 2,800 MW of nameplate capacity; largest by capacity: coal, natural gas.
Within 50 km: /v1/lookup section power; details: /v1/records/{id}
Substations and transmission
About 250 in-service substations, about 15 rated 230 kV or higher.
About 910 miles of transmission lines: about 620 mi at 100–161 kV; about 190 mi at 220–287 kV; about 80 mi at 500 kV.
Water and sewer service
Service areas of about 20 community water systems cover about 55% of the county.
Sewer service areas of about 15 systems cover about 36%.
At an address or point: /v1/lookup section utilities
Data-center projects
5 tracked projects: 1 operating, 1 under construction, 2 proposed, 1 status not reported. Reported planned capacity: about 1,600 MW.
Within 10 km: /v1/lookup section datacenters
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 1%.
At an address or point: /v1/lookup section environment
Rail, ports and freight
- About 550 miles of active rail, about 280 of it main line
- About 170 miles of national freight network highway
- 2 intermodal rail terminals
Within 25 km: /v1/lookup section logistics
Example requests for Jefferson 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 801 11TH PL N, Birmingham, AL 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":"801 11TH PL N, Birmingham, AL","sections":["datacenters"]}' \
https://api.korzy.co/v1/lookupPython
import os
import requests
response = requests.post(
"https://api.korzy.co/v1/lookup",
json={"address": "801 11TH PL N, Birmingham, AL", "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": -86.82218516993848,
"latitude": 33.516175849999996,
"address": "801 11TH PL N, Birmingham",
"match_type": "exact"
},
"parcels": {
"records": [
{
"id": "01073-3188d3b52bf8ed4a6f16",
"korzy_id": "01073-3188d3b52bf8ed4a6f16",
"parcelid": "2200352008027000",
"parceladdr": "801 11TH PL N",
"parcelcity": "Birmingham",
"situs_zip": "35204",
"statefp": "01",
"geoid": "01073",
"longitude": -86.82218516993848,
"latitude": 33.516175849999996,
"land_use_code": "C",
"taxacres": 0.08,
"assessed_value_usd": 1540,
"updated": "2026-10-29"
}
],
"truncated": false
},
"sections": {
"datacenters": {
"status": "ok",
"data": {
"radius_km": 10,
"projects": [
{
"id": "datacenter:dc_89c39ca1a1016023e75b",
"project_id": "dc_89c39ca1a1016023e75b",
"name": "DC BLOX Birmingham Data Center Campus",
"operator": "DC BLOX",
"status": "operating",
"state": "AL",
"city": "Birmingham",
"address": "433 6th Street South",
"longitude": -86.8208315,
"latitude": 33.5006652,
"location_precision": "exact",
"operational_mw": 5,
"planned_mw": 60,
"source_count": 1,
"source_date": "2026-09-21",
"mapped": true,
"distance_km": 1.7292684035964994
},
{
"id": "datacenter:dc_d62fabff48ac59ebe116",
"project_id": "dc_d62fabff48ac59ebe116",
"name": "Nebius Birmingham AI Factory (BHM01)",
"operator": "Nebius Group",
"status": "under_construction",
"state": "AL",
"city": "Birmingham",
"longitude": -86.8131,
"latitude": 33.4556,
"location_precision": "exact",
"planned_mw": 300,
"source_count": 1,
"source_date": "2026-09-28",
"mapped": true,
"distance_km": 6.7882278683856025
},
{
"id": "datacenter:dc_c86712f48ccc7c021b95",
"project_id": "dc_c86712f48ccc7c021b95",
"name": "Patmos Fairfield Colocation Data Center",
"operator": "Patmos",
"status": "proposed",
"state": "AL",
"city": "Fairfield",
"longitude": -86.9150283,
"latitude": 33.4916836,
"location_precision": "approximate",
"planned_mw": 45,
"source_count": 1,
"source_date": "2026-09-28",
"mapped": true,
"distance_km": 9.028924189785771
}
],
"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 01073-3188d3b52bf8ed4a6f16, 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":"01073-3188d3b52bf8ed4a6f16"}],"fields":["identity","sale","owner"]}' \
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 $KORZY_API_KEY" \
https://api.korzy.co/v1/records/01073-3188d3b52bf8ed4a6f16JavaScript
const response = await fetch(`https://api.korzy.co/v1/records/${encodeURIComponent("01073-3188d3b52bf8ed4a6f16")}`, {
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);Jefferson County data questions
- How many parcels in Jefferson County include values?
- About 320,000 of about 330,000 parcel records (96%) include values.
- Does the Korzy API return owner names for Jefferson County parcels?
- Yes. 96% of Jefferson 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 Jefferson County?
- Korzy tracks 5 data-center projects in Jefferson County: 2 proposed, 1 operating and 1 under construction. A /v1/lookup with the datacenters section lists projects within 10 km of any address or point.
- How much power generation is in Jefferson County?
- 2 operable power plants in Jefferson County total about 2,800 MW of nameplate capacity, mainly coal and natural gas.
- Which water systems serve Jefferson County?
- Service areas of about 20 community water systems cover about 55% of Jefferson County, and sewer service areas cover about 36%. A /v1/lookup with the utilities section returns the water and sewer matches at an address or point.
More featured counties
- Tuscaloosa County, ALBorders Jefferson County · about 120,000 parcels
- Madison County, ALabout 190,000 parcels
Build on Jefferson 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.