Clayton County, GA parcel and infrastructure data API

Parcel coverage in Clayton County

About 91,000 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 /api/parcel-record. Share of records with each field:

Owner name and mailing address are returned with include_owner=true, which doubles a request's cost: a parcel record costs 2 credits instead of 1. 99% of Clayton County records carry an owner name.

Infrastructure in and around Clayton County

Example requests for Clayton County

Real responses from the production API, trimmed to the main fields. Every request needs an API key with api:read; see authentication and credits and limits.

1. Find a parcel by address

/api/search matches 28 VALLEY HILL RD, RIVERDALE, GA and returns the parcel's korzy_id, coordinates and record. 1 credit.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'q=28 VALLEY HILL RD, RIVERDALE, GA' \
  https://api.korzy.co/api/search

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "28 VALLEY HILL RD, RIVERDALE, GA"},
    headers={"Authorization": f"Bearer {os.environ['KORZY_API_KEY']}"},
    timeout=30,
)
response.raise_for_status()
parcel = response.json()["results"][0]
print(parcel["korzy_id"], parcel["longitude"], parcel["latitude"])

{
  "results": [
    {
      "korzy_id": "13063-862357640e60755eae19",
      "address": "28 VALLEY HILL RD",
      "city": "RIVERDALE",
      "postcode": "30274",
      "county": "Clayton",
      "statefp": "13",
      "longitude": -84.38951473072359,
      "latitude": 33.55886515,
      "match_type": "exact",
      "parcelid": "13173C A003",
      "parceladdr": "28 VALLEY HILL RD",
      "parcelcity": "RIVERDALE",
      "situs_zip": "30274",
      "usedesc": "Religious (Church, Synagogue, Mosque)",
      "land_use_code": "620",
      "zoning_code": "RS110",
      "yearbuilt": 1969,
      "bldgsqft": 2536,
      "taxacres": 1.41,
      "totalvalue": 188200,
      "land_value_usd": 30300,
      "improvement_value_usd": 157900,
      "assessed_value_usd": -75280,
      "market_value_usd": 188200,
      "saledate": "2019-08-10",
      "saleamt": 0,
      "updated": "2026-10-30",
      "geoid": "13063"
    }
  ],
  "truncated": false
}

With include_owner=true (2 credits) the record adds owner fields, shown here as placeholders:

{
  "owner_name": "EXAMPLE HOLDINGS LLC",
  "owner_mailing_address": "100 EXAMPLE ST, SAMPLE CITY, ST 00000"
}

2. Look up the parcel at a point

/api/query/point returns every parcel whose boundary covers the coordinates; here it returns the same record, 13063-862357640e60755eae19, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-84.389515' \
  --data-urlencode 'latitude=33.558865' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point

const params = new URLSearchParams({"longitude": "-84.389515", "latitude": "33.558865", "limit": "5"});
const response = await fetch(`https://api.korzy.co/api/query/point?${params}`, {
  headers: { Authorization: `Bearer ${process.env.KORZY_API_KEY}` },
});
if (!response.ok) throw new Error(`Korzy API ${response.status}`);
const { records } = await response.json();
console.log(records.map((record) => record.korzy_id));

3. Check water and sewer service

/api/utilities/context returns the water and sewer service areas at the point and the nearest treatment plants. 1 credit.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-84.389515' \
  --data-urlencode 'latitude=33.558865' \
  https://api.korzy.co/api/utilities/context

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/utilities/context",
    params={"longitude": "-84.389515", "latitude": "33.558865"},
    headers={"Authorization": f"Bearer {os.environ['KORZY_API_KEY']}"},
    timeout=30,
)
response.raise_for_status()
matches = response.json()["matches"]
print([area["name"] for area in matches["water"]])

{
  "longitude": -84.389515,
  "latitude": 33.558865,
  "matches": {
    "water": [
      {
        "feature_id": "water:40918",
        "name": "CLAYTON COUNTY WATER AUTHORITY",
        "boundary_basis": "System Sourced"
      }
    ],
    "sewer": [
      {
        "feature_id": "sewer:5609",
        "name": "E L Huie-Casey Natural Treatment System",
        "boundary_basis": "Modeled"
      }
    ]
  },
  "nearby_treatment": [
    {
      "feature_id": "treatment:15087",
      "name": "E L Huie-Casey Natural Treatment System",
      "distance_km": 11.426180380498284
    },
    {
      "feature_id": "treatment:3119",
      "name": "Northeast Clayton WRF",
      "distance_km": 11.852474725227292
    }
  ]
}

Clayton County data questions

How many parcels in Clayton County include year built?

About 84,000 of about 91,000 parcel records (92%) include year built.

Does the Korzy API return owner names for Clayton County parcels?

Yes. 99% of Clayton County parcel records carry an owner name. Add include_owner=true to a point, search or parcel-record request; it doubles the request's cost, so a single parcel record costs 2 credits.

How many data-center projects are in Clayton County?

Korzy tracks 1 data-center project in Clayton County: 1 permitted. /api/datacenters/context lists projects within 10 km of any point.

Which water systems serve Clayton County?

Service areas of 8 community water systems cover about 99% of Clayton County, and sewer service areas cover about 81%. /api/utilities/context returns the water and sewer matches at a point.

How much of Clayton County is in a mapped flood zone?

About 9% of Clayton County's area falls within special flood hazard areas on the current federal flood maps, and mapped wetlands cover about 4%.

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