Western Connecticut Planning Region, CT parcel and infrastructure data API

Parcel coverage in Western Connecticut Planning Region

About 180,000 parcel records with boundaries, situs addresses and parcel numbers, with the latest source update from August 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:

Western Connecticut Planning Region records do not include owner names. See pricing for credit costs.

Infrastructure in and around Western Connecticut Planning Region

Example requests for Western Connecticut Planning Region

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 its water and sewer service

/v1/lookup matches 15 HUBBARD RD, NORWALK, CT and returns the parcel's korzy_id and record, plus the water and sewer service areas at the parcel and the nearest treatment plants. 2 credits.

curl --fail-with-body -sS \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"address":"15 HUBBARD RD, NORWALK, CT","sections":["utilities"]}' \
  https://api.korzy.co/v1/lookup

import os
import requests

response = requests.post(
    "https://api.korzy.co/v1/lookup",
    json={"address": "15 HUBBARD RD, NORWALK, CT", "sections": ["utilities"]},
    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"]["utilities"]["status"])

{
  "location": {
    "longitude": -73.43381883794257,
    "latitude": 41.19282345028376,
    "address": "15 HUBBARD RD, NORWALK",
    "match_type": "exact"
  },
  "parcels": {
    "records": [
      {
        "id": "09190-9150e307593ce602fa63",
        "korzy_id": "09190-9150e307593ce602fa63",
        "parcelid": "7c4e0167-409e-48df-940e-274289b8bfcd",
        "parceladdr": "15 HUBBARD RD",
        "parcelcity": "NORWALK",
        "situs_zip": "06897",
        "statefp": "09",
        "geoid": "09190",
        "longitude": -73.43381883794257,
        "latitude": 41.19282345028376,
        "usedesc": "Commercial",
        "yearbuilt": 1986,
        "bldgsqft": 11309,
        "totalvalue": 2565710,
        "saledate": "1984-01-13",
        "saleamt": 0,
        "updated": "2026-08-06"
      }
    ],
    "truncated": false
  },
  "sections": {
    "utilities": {
      "status": "ok",
      "data": {
        "water": [
          {
            "id": "utility:water:34943",
            "feature_id": "water:34943",
            "name": "AQUARION-EASTERN FAIRFIELD COUNTY",
            "boundary_basis": "System Sourced"
          }
        ],
        "sewer": [
          {
            "id": "utility:sewer:173",
            "feature_id": "sewer:173",
            "name": "NORWALK WPCF",
            "boundary_basis": "Sourced"
          }
        ],
        "treatment_plants": [
          {
            "id": "utility:treatment:636",
            "feature_id": "treatment:636",
            "name": "NEW CANAAN WPCF",
            "distance_km": 7.150873978807483
          },
          {
            "id": "utility:treatment:653",
            "feature_id": "treatment:653",
            "name": "REDDING - GEORGETOWN WPCF",
            "distance_km": 7.280282587251575
          },
          {
            "id": "utility:treatment:90",
            "feature_id": "treatment:90",
            "name": "North Salem, (T) Peach Lake WWTP & Collection",
            "distance_km": 7.475010249010925
          }
        ],
        "truncated": {
          "water": false,
          "sewer": false
        }
      },
      "provenance": [
        {
          "dataset": "water",
          "data_version": "63b7c1c3-9661-4fed-a59f-ddbfff80c2e4"
        },
        {
          "dataset": "sewer",
          "data_version": "63b7c1c3-9661-4fed-a59f-ddbfff80c2e4"
        },
        {
          "dataset": "treatment",
          "data_version": "63b7c1c3-9661-4fed-a59f-ddbfff80c2e4"
        }
      ]
    }
  },
  "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 09190-9150e307593ce602fa63. 1 credit.

curl --fail-with-body -sS \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"items":[{"korzy_id":"09190-9150e307593ce602fa63"}],"fields":["identity","value","sale"]}' \
  https://api.korzy.co/v1/enrich

3. 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/09190-9150e307593ce602fa63

const response = await fetch(`https://api.korzy.co/v1/records/${encodeURIComponent("09190-9150e307593ce602fa63")}`, {
  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);

Western Connecticut Planning Region data questions

How many parcels in Western Connecticut Planning Region include year built?

About 160,000 of about 180,000 parcel records (91%) include year built.

Does the Korzy API return owner names for Western Connecticut Planning Region parcels?

Western Connecticut Planning Region parcel records do not include owner names. Values, land use and building facts are returned where the planning region publishes them.

How many data-center projects are in Western Connecticut Planning Region?

Korzy tracks 3 data-center projects in Western Connecticut Planning Region: 2 operating and 1 status not reported. A /v1/lookup with the datacenters section lists projects within 10 km of any address or point.

How much power generation is in Western Connecticut Planning Region?

About 10 operable power plants in Western Connecticut Planning Region total about 280 MW of nameplate capacity, mainly oil, natural gas and battery and pumped storage.

Which water systems serve Western Connecticut Planning Region?

Service areas of about 80 community water systems cover about 33% of Western Connecticut Planning Region, and sewer service areas cover about 14%. A /v1/lookup with the utilities section returns the water and sewer matches at an address or point.

More featured counties

• Greater Bridgeport Planning Region, CTBorders Western Connecticut Planning Region · about 100,000 parcels
• Naugatuck Valley Planning Region, CTBorders Western Connecticut Planning Region · about 170,000 parcels
• Westchester County, NYBorders Western Connecticut Planning Region · about 250,000 parcels
• Capitol Planning Region, CTabout 360,000 parcels
• South Central Connecticut Planning Region, CTabout 190,000 parcels
• Southeastern Connecticut Planning Region, CTabout 120,000 parcels

All featured Connecticut planning regions