Rockland County, NY parcel and infrastructure data API

Parcel coverage in Rockland County

About 93,000 parcel records with boundaries, situs addresses and parcel numbers, with the latest source update from January 2025. 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. 98% of Rockland County records carry an owner name.

Infrastructure in and around Rockland County

Example requests for Rockland 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 62 OLD MIDDLETOWN RD NC, Clarkstown, NY 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=62 OLD MIDDLETOWN RD NC, Clarkstown, NY' \
  https://api.korzy.co/api/search

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "62 OLD MIDDLETOWN RD NC, Clarkstown, NY"},
    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": "36087-61a5c105f94c20b35652",
      "address": "62 OLD MIDDLETOWN RD NC",
      "city": "Clarkstown",
      "postcode": "10956",
      "county": "Rockland",
      "statefp": "36",
      "longitude": -74.00373171647662,
      "latitude": 41.124434550000004,
      "match_type": "exact",
      "parcelid": "39208905101700020410000000",
      "parceladdr": "62 OLD MIDDLETOWN RD NC",
      "parcelcity": "Clarkstown",
      "situs_zip": "10956",
      "usedesc": "School",
      "land_use_code": "612",
      "yearbuilt": 1960,
      "bldgsqft": 29549,
      "taxacres": 7.6,
      "totalvalue": 419400,
      "land_value_usd": 419400,
      "assessed_value_usd": 2119200,
      "market_value_usd": 2316030,
      "updated": "2025-01-01",
      "geoid": "36087"
    }
  ],
  "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, 36087-61a5c105f94c20b35652, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-74.003732' \
  --data-urlencode 'latitude=41.124435' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point

const params = new URLSearchParams({"longitude": "-74.003732", "latitude": "41.124435", "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 nearby data-center projects

/api/datacenters/context lists data-center projects within 10 km of the point, nearest first. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-74.003732' \
  --data-urlencode 'latitude=41.124435' \
  --data-urlencode 'radius_km=10' \
  --data-urlencode 'limit=3' \
  https://api.korzy.co/api/datacenters/context

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/datacenters/context",
    params={"longitude": "-74.003732", "latitude": "41.124435", "radius_km": "10", "limit": "3"},
    headers={"Authorization": f"Bearer {os.environ['KORZY_API_KEY']}"},
    timeout=30,
)
response.raise_for_status()
for project in response.json()["projects"]:
    print(project["name"], project["status"], project["distance_km"])

{
  "projects": [
    {
      "project_id": "dc_a9c4a48b68f374e6f39f",
      "name": "Unnamed data center",
      "status": "unknown",
      "city": "Orangeburg",
      "state": "NY",
      "longitude": -73.971751178657,
      "latitude": 41.05239225,
      "location_precision": "footprint",
      "distance_km": 8.447278852125653
    },
    {
      "project_id": "dc_84cad11af5f8adb9450d",
      "name": "JPMorgan Chase Data Center, Orangeburg",
      "operator": "JPMorgan Chase",
      "status": "operating",
      "city": "Orangeburg",
      "state": "NY",
      "longitude": -73.973952,
      "latitude": 41.044286,
      "location_precision": "approximate",
      "distance_km": 9.25508223326931
    },
    {
      "project_id": "dc_0ea66bea4fb306f83012",
      "name": "DataBank LGA3 (Orangeburg Data Center Campus)",
      "operator": "DataBank",
      "status": "operating",
      "city": "Orangeburg",
      "state": "NY",
      "longitude": -73.98965097768007,
      "latitude": 41.03999185,
      "location_precision": "footprint",
      "operational_mw": 20,
      "planned_mw": 40,
      "distance_km": 9.4635431615394
    }
  ],
  "radius_km": 10,
  "limit": 3,
  "truncated": true
}

Rockland County data questions

How many parcels in Rockland County include year built?

About 85,000 of about 93,000 parcel records (91%) include year built.

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

Yes. 98% of Rockland 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 Rockland County?

Korzy tracks 7 data-center projects in Rockland County: 4 operating and 3 status not reported. /api/datacenters/context lists projects within 10 km of any point.

How much power generation is in Rockland County?

9 operable power plants in Rockland County total about 1,300 MW of nameplate capacity, mainly natural gas, battery and pumped storage and solar.

Which water systems serve Rockland County?

Service areas of about 20 community water systems cover about 86% of Rockland County, and sewer service areas cover about 63%. /api/utilities/context returns the water and sewer matches at a point.

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