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Norfolk County, MA parcel and infrastructure data API

Korzy has about 250,000 parcel records for Norfolk County, Massachusetts, with source updates through November 2026. Nearly every record carries values, last sale and building size; 92% include year built. In and around the county the API also maps about 35 power plants with about 2,400 MW of capacity, led by natural gas; 1 data-center project (1 operating); and about 110 miles of active rail. 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 Norfolk County

About 250,000 parcel records with boundaries, situs addresses and parcel numbers, with the latest source update from November 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 · 99%
Owner nameNot published
Assessed or market valueNearly all · 99%
Year builtMost · 92%
Building sizeNearly all · 99%
Last saleNearly all · 99%
Land useSome · 18%
ZoningNot published

Norfolk County records do not include owner names. See pricing for credit costs.

Infrastructure in and around Norfolk County

Power plants

About 35 operable plants with about 2,400 MW of nameplate capacity; largest by capacity: natural gas, battery and pumped storage, oil. Proposed generators add about 260 MW.

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

Substations and transmission

About 50 in-service substations, about 10 rated 230 kV or higher.

About 290 miles of transmission lines: about 140 mi at 100–161 kV; about 35 mi at 220–287 kV; about 120 mi at 345 kV.

Water and sewer service

Service areas of about 50 community water systems cover about 70% of the county.

Sewer service areas of about 10 systems cover about 45%.

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

Data-center projects

1 tracked project: 1 operating.

Within 10 km: /v1/lookup section datacenters

Grid capacity data

4 utility-published grid capacity layers cover parts of Norfolk County, including loading forecasts, substation inventory.

Nearby records: /v1/lookup section grid

Flood zones and wetlands

Special flood hazard areas cover about 15% of the county on the current federal flood maps, published October 2026.

Mapped wetlands cover about 12%.

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

Rail, ports and freight

  • About 110 miles of active rail, about 90 of it main line
  • About 50 miles of national freight network highway

Within 25 km: /v1/lookup section logistics

Example requests for Norfolk County

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 535 565 UNIVERSITY AV, NORWOOD, MA 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":"535 565 UNIVERSITY AV, NORWOOD, MA","sections":["utilities"]}' \
  https://api.korzy.co/v1/lookup
Python
import os
import requests

response = requests.post(
    "https://api.korzy.co/v1/lookup",
    json={"address": "535 565 UNIVERSITY AV, NORWOOD, MA", "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": -71.16291004284899,
    "latitude": 42.19954735,
    "address": "535 565 UNIVERSITY AV, NORWOOD",
    "match_type": "exact"
  },
  "parcels": {
    "records": [
      {
        "id": "25021-08fb3d36f23d0e99cf02",
        "korzy_id": "25021-08fb3d36f23d0e99cf02",
        "parcelid": "22 14 3",
        "parceladdr": "535 565 UNIVERSITY AV",
        "parcelcity": "NORWOOD",
        "situs_zip": "02062",
        "statefp": "25",
        "geoid": "25021",
        "longitude": -71.16291004284899,
        "latitude": 42.19954735,
        "usedesc": "INDUSTRIAL",
        "yearbuilt": 1973,
        "bldgsqft": 105780,
        "taxacres": 4.86,
        "totalvalue": 7761600,
        "saledate": "2016-04-27",
        "saleamt": 6400000,
        "updated": "2026-11-03"
      }
    ],
    "truncated": false
  },
  "sections": {
    "utilities": {
      "status": "ok",
      "data": {
        "sewer": [
          {
            "id": "utility:sewer:919",
            "feature_id": "sewer:919",
            "name": "MWRA Deer Island WWTF",
            "boundary_basis": "Sourced"
          }
        ],
        "treatment_plants": [
          {
            "id": "utility:treatment:2130",
            "feature_id": "treatment:2130",
            "name": "Medfield Sewerage Collection System and WWTF",
            "distance_km": 14.2138566407004
          },
          {
            "id": "utility:treatment:15585",
            "feature_id": "treatment:15585",
            "name": "Easton Sewerage Collection System and WWTF",
            "distance_km": 15.376911187056825
          },
          {
            "id": "utility:treatment:15586",
            "feature_id": "treatment:15586",
            "name": "Norfolk Sewerage Collection System and WWTF",
            "distance_km": 16.06028726173821
          }
        ],
        "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 25021-08fb3d36f23d0e99cf02. 1 credit.

curl --fail-with-body -sS \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"items":[{"korzy_id":"25021-08fb3d36f23d0e99cf02"}],"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 $KORZY_API_KEY" \
  https://api.korzy.co/v1/records/25021-08fb3d36f23d0e99cf02
JavaScript
const response = await fetch(`https://api.korzy.co/v1/records/${encodeURIComponent("25021-08fb3d36f23d0e99cf02")}`, {
  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);

Norfolk County data questions

How many parcels in Norfolk County include year built?
About 230,000 of about 250,000 parcel records (92%) include year built.
Does the Korzy API return owner names for Norfolk County parcels?
Norfolk County parcel records do not include owner names. Values, land use and building facts are returned where the county publishes them.
How many data-center projects are in Norfolk County?
Korzy tracks 1 data-center project in Norfolk County: 1 operating. A /v1/lookup with the datacenters section lists projects within 10 km of any address or point.
How much power generation is in Norfolk County?
About 35 operable power plants in Norfolk County total about 2,400 MW of nameplate capacity, mainly natural gas, battery and pumped storage and oil.
Which water systems serve Norfolk County?
Service areas of about 50 community water systems cover about 70% of Norfolk County, and sewer service areas cover about 45%. A /v1/lookup with the utilities section returns the water and sewer matches at an address or point.

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Build on Norfolk County 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.

Get an API keySee pricingAPI referenceUse cases for parcel and infrastructure data