Naugatuck Valley Planning Region, CT parcel and infrastructure data API

Parcel coverage in Naugatuck Valley Planning Region

About 170,000 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. 19% of Naugatuck Valley Planning Region records carry an owner name.

Infrastructure in and around Naugatuck Valley Planning Region

Example requests for Naugatuck Valley Planning Region

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 35 PORTER AVE, Naugatuck, CT 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=35 PORTER AVE, Naugatuck, CT' \
  https://api.korzy.co/api/search

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "35 PORTER AVE, Naugatuck, CT"},
    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": "09140-daa367cbf3d8ad04de91",
      "address": "35 PORTER AVE",
      "city": "Naugatuck",
      "postcode": "06770",
      "county": "Naugatuck Valley",
      "statefp": "09",
      "longitude": -73.05761202686156,
      "latitude": 41.5068154,
      "match_type": "exact",
      "parcelid": "32-103",
      "parceladdr": "35 PORTER AVE",
      "parcelcity": "Naugatuck",
      "situs_zip": "06770",
      "usedesc": "Commercial",
      "land_use_code": "200",
      "zoning_code": "DD",
      "yearbuilt": 1970,
      "bldgsqft": 5348,
      "taxacres": 1,
      "totalvalue": 655690,
      "land_value_usd": 101800,
      "improvement_value_usd": 801800,
      "assessed_value_usd": 655690,
      "saledate": "2012-09-11",
      "saleamt": 359610,
      "updated": "2026-01-01",
      "geoid": "09140"
    }
  ],
  "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, 09140-daa367cbf3d8ad04de91, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-73.057612' \
  --data-urlencode 'latitude=41.506815' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point

const params = new URLSearchParams({"longitude": "-73.057612", "latitude": "41.506815", "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=-73.057612' \
  --data-urlencode 'latitude=41.506815' \
  https://api.korzy.co/api/utilities/context

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/utilities/context",
    params={"longitude": "-73.057612", "latitude": "41.506815"},
    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": -73.057612,
  "latitude": 41.506815,
  "matches": {
    "water": [
      {
        "feature_id": "water:35140",
        "name": "CTWC - NAUGATUCK REGION-CENTRAL SYSTEM",
        "boundary_basis": "System Sourced"
      }
    ],
    "sewer": [
      {
        "feature_id": "sewer:163",
        "name": "NAUGATUCK WPCF",
        "boundary_basis": "Sourced"
      }
    ]
  },
  "nearby_treatment": [
    {
      "feature_id": "treatment:677",
      "name": "WATERBURY WPCF",
      "distance_km": 2.1500245761552024
    },
    {
      "feature_id": "treatment:635",
      "name": "NAUGATUCK WPCF",
      "distance_km": 3.771130364343389
    }
  ]
}

Naugatuck Valley Planning Region data questions

How many parcels in Naugatuck Valley Planning Region include year built?

About 160,000 of about 170,000 parcel records (96%) include year built.

Does the Korzy API return owner names for Naugatuck Valley Planning Region parcels?

Yes. 19% of Naugatuck Valley Planning Region 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 Naugatuck Valley Planning Region?

Korzy tracks 3 data-center projects in Naugatuck Valley Planning Region: 2 proposed and 1 operating. /api/datacenters/context lists projects within 10 km of any point.

How much power generation is in Naugatuck Valley Planning Region?

About 15 operable power plants in Naugatuck Valley Planning Region total about 1,000 MW of nameplate capacity, mainly natural gas, battery and pumped storage and hydro.

Which water systems serve Naugatuck Valley Planning Region?

Service areas of about 45 community water systems cover about 40% of Naugatuck Valley Planning Region, and sewer service areas cover about 23%. /api/utilities/context returns the water and sewer matches at a point.

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