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Capitol Planning Region, CT parcel and infrastructure data API

Korzy has about 360,000 parcel records for Capitol Planning Region, Connecticut, with source updates through October 2026. Nearly every record carries values; 94% include land use and 92% include year built. In and around the planning region the API also maps 4 data-center projects (1 operating); and about 50 power plants with about 390 MW of capacity, led by solar. Look up any parcel by address or coordinates, then check water, sewer and infrastructure context at the same point.

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Parcel coverage in Capitol Planning Region

About 360,000 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 /v1/records/{id}. Share of records with each field:

FieldCoverageShare
Situs addressNearly all · 98%
Owner nameMany · 45%
Assessed or market valueNearly all · 95%
Year builtMost · 92%
Building sizeMost · 91%
Last saleMost · 90%
Land useMost · 94%
ZoningMany · 44%

Owner name and mailing address are returned by /v1/enrich with the owner group, at 2 credits per parcel instead of 1 credit. 45% of Capitol Planning Region records carry an owner name.

Infrastructure in and around Capitol Planning Region

Power plants

About 50 operable plants with about 390 MW of nameplate capacity; largest by capacity: solar, natural gas, battery and pumped storage. Proposed generators add about 210 MW.

Within 50 km: /v1/lookup section power; details: /v1/records/{id}

Substations and transmission

About 50 in-service substations, 5 rated 230 kV or higher.

About 430 miles of transmission lines: 4 mi at under 100 kV; about 300 mi at 100–161 kV; about 120 mi at 345 kV.

Water and sewer service

Service areas of about 120 community water systems cover about 38% of the planning region.

Sewer service areas of about 30 systems cover about 26%.

At an address or point: /v1/lookup section utilities

Data-center projects

4 tracked projects: 1 operating, 2 proposed, 1 status not reported. Reported planned capacity: about 45 MW.

Within 10 km: /v1/lookup section datacenters

Grid capacity data

1 utility-published grid capacity layer cover parts of Capitol Planning Region, including load headroom.

Nearby records: /v1/lookup section grid

Flood zones and wetlands

Special flood hazard areas cover about 7% of the planning region on the current federal flood maps, published September 2026.

Mapped wetlands cover about 6%.

At an address or point: /v1/lookup section environment

Rail, ports and freight

  • About 95 miles of national freight network highway

Within 25 km: /v1/lookup section logistics

Example requests for Capitol 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 20 FRONT ST, Hartford, 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":"20 FRONT ST, Hartford, CT","sections":["utilities"]}' \
  https://api.korzy.co/v1/lookup
Python
import os
import requests

response = requests.post(
    "https://api.korzy.co/v1/lookup",
    json={"address": "20 FRONT ST, Hartford, 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"])
Production response (trimmed)
{
  "location": {
    "longitude": -72.67130763374782,
    "latitude": 41.763158649999994,
    "address": "20 FRONT ST, Hartford",
    "match_type": "exact"
  },
  "parcels": {
    "records": [
      {
        "id": "09110-0e0d5291c0ed7807eb52",
        "korzy_id": "09110-0e0d5291c0ed7807eb52",
        "parcelid": "269360017",
        "parceladdr": "20 FRONT ST",
        "parcelcity": "Hartford",
        "situs_zip": "06103",
        "statefp": "09",
        "geoid": "09110",
        "longitude": -72.67130763374782,
        "latitude": 41.763158649999994,
        "usedesc": "ST-CRDA EXEMPT",
        "land_use_code": "909.0",
        "zoning_code": "DT-1",
        "yearbuilt": 2014,
        "bldgsqft": 118955,
        "taxacres": 0,
        "totalvalue": 6512909,
        "land_value_usd": 0,
        "improvement_value_usd": 17722200,
        "assessed_value_usd": 6512909,
        "saledate": "2012-07-30",
        "saleamt": 0,
        "updated": "2021-01-01"
      }
    ],
    "truncated": false
  },
  "sections": {
    "utilities": {
      "status": "ok",
      "data": {
        "water": [
          {
            "id": "utility:water:35297",
            "feature_id": "water:35297",
            "name": "METROPOLITAN DISTRICT COMMISSION",
            "boundary_basis": "System Sourced"
          }
        ],
        "sewer": [
          {
            "id": "utility:sewer:151",
            "feature_id": "sewer:151",
            "name": "HARTFORD WPCF",
            "boundary_basis": "Sourced"
          }
        ],
        "treatment_plants": [
          {
            "id": "utility:treatment:624",
            "feature_id": "treatment:624",
            "name": "EAST HARTFORD WPCF",
            "distance_km": 1.7189478515562289
          },
          {
            "id": "utility:treatment:622",
            "feature_id": "treatment:622",
            "name": "HARTFORD WPCF",
            "distance_km": 3.7407836483524437
          },
          {
            "id": "utility:treatment:662",
            "feature_id": "treatment:662",
            "name": "SOUTH WINDSOR WPCF",
            "distance_km": 7.939352931553132
          }
        ],
        "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 owner and sale fields

/v1/enrich returns the fields you choose for up to 25 parcels per request; here the parcel 09110-0e0d5291c0ed7807eb52, 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":"09110-0e0d5291c0ed7807eb52"}],"fields":["identity","sale","owner"]}' \
  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 $KORZY_API_KEY" \
  https://api.korzy.co/v1/records/09110-0e0d5291c0ed7807eb52
JavaScript
const response = await fetch(`https://api.korzy.co/v1/records/${encodeURIComponent("09110-0e0d5291c0ed7807eb52")}`, {
  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);

Capitol Planning Region data questions

How many parcels in Capitol Planning Region include year built?
About 330,000 of about 360,000 parcel records (92%) include year built.
Does the Korzy API return owner names for Capitol Planning Region parcels?
Yes. 45% of Capitol Planning Region 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 Capitol Planning Region?
Korzy tracks 4 data-center projects in Capitol Planning Region: 2 proposed, 1 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 Capitol Planning Region?
About 50 operable power plants in Capitol Planning Region total about 390 MW of nameplate capacity, mainly solar, natural gas and battery and pumped storage.
Which water systems serve Capitol Planning Region?
Service areas of about 120 community water systems cover about 38% of Capitol Planning Region, and sewer service areas cover about 26%. A /v1/lookup with the utilities section returns the water and sewer matches at an address or point.

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Build on Capitol Planning Region 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.

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