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Suffolk County, MA parcel and infrastructure data API

Korzy has about 200,000 parcel records for Suffolk County, Massachusetts, with source updates through November 2026. Nearly every record carries values; 91% include year built and 91% include building size. In and around the county the API also maps 2 data-center projects (2 operating); 1 port with reported cargo; and about 10 power plants with about 270 MW of capacity, led by oil. 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 Suffolk County

About 200,000 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 · 100%
Owner nameNot published
Assessed or market valueNearly all · 95%
Year builtMost · 91%
Building sizeMost · 91%
Last saleSome · 9%
Land useMost · 89%
ZoningNot published

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

Infrastructure in and around Suffolk County

Power plants

About 10 operable plants with about 270 MW of nameplate capacity; largest by capacity: oil, natural gas, other fuels. Proposed generators add about 250 MW.

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

Substations and transmission

About 15 in-service substations, 2 rated 230 kV or higher.

About 70 miles of transmission lines: about 50 mi at 100–161 kV; about 15 mi at 345 kV.

Water and sewer service

Service areas of about 15 community water systems cover about 90% of the county.

Sewer service areas of 2 systems cover about 94%.

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

Data-center projects

2 tracked projects: 2 operating. Reported operating capacity: about 30 MW.

Within 10 km: /v1/lookup section datacenters

Grid capacity data

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

Nearby records: /v1/lookup section grid

Flood zones and wetlands

Special flood hazard areas cover about 20% of the county on the current federal flood maps, published October 2026.

Mapped wetlands cover about 5%.

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

Rail, ports and freight

  • About 60 miles of active rail, about 40 of it main line
  • About 25 miles of national freight network highway
  • 1 port area with reported cargo tonnage

Within 25 km: /v1/lookup section logistics

Example requests for Suffolk 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 1511 1525 WASHINGTON ST MA 2118, BOSTON, 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":"1511 1525 WASHINGTON ST MA 2118, BOSTON, 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": "1511 1525 WASHINGTON ST MA 2118, BOSTON, 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": -71.07248877617188,
    "latitude": 42.3399547,
    "address": "1511 1525 WASHINGTON ST MA 2118, BOSTON",
    "match_type": "exact"
  },
  "parcels": {
    "records": [
      {
        "id": "25025-b5f09790f0892031769c",
        "korzy_id": "25025-b5f09790f0892031769c",
        "parcelid": "0900190000",
        "parceladdr": "1511 1525 WASHINGTON ST MA 2118",
        "parcelcity": "BOSTON",
        "situs_zip": "02118",
        "statefp": "25",
        "geoid": "25025",
        "longitude": -71.07248877617188,
        "latitude": 42.3399547,
        "usedesc": "RES /COMMERCIAL USE",
        "yearbuilt": 1900,
        "bldgsqft": 58880,
        "taxacres": 9280,
        "totalvalue": 12100800,
        "updated": "2026-11-03"
      }
    ],
    "truncated": false
  },
  "sections": {
    "utilities": {
      "status": "ok",
      "data": {
        "water": [
          {
            "id": "utility:water:36548",
            "feature_id": "water:36548",
            "name": "BOSTON WATER AND SEWER COMMISSION (MWRA)",
            "boundary_basis": "System Sourced"
          }
        ],
        "sewer": [
          {
            "id": "utility:sewer:919",
            "feature_id": "sewer:919",
            "name": "MWRA Deer Island WWTF",
            "boundary_basis": "Sourced"
          }
        ],
        "treatment_plants": [
          {
            "id": "utility:treatment:2098",
            "feature_id": "treatment:2098",
            "name": "MWRA Deer Island WWTF",
            "distance_km": 9.571729808242342
          },
          {
            "id": "utility:treatment:2084",
            "feature_id": "treatment:2084",
            "name": "Hull Sewerage Collection System and WPCF",
            "distance_km": 14.722246990168644
          },
          {
            "id": "utility:treatment:2045",
            "feature_id": "treatment:2045",
            "name": "Lynn Sewerage Collection System and WPCF",
            "distance_km": 15.790449370720179
          }
        ],
        "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 25025-b5f09790f0892031769c. 1 credit.

curl --fail-with-body -sS \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"items":[{"korzy_id":"25025-b5f09790f0892031769c"}],"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 $KORZY_API_KEY" \
  https://api.korzy.co/v1/records/25025-b5f09790f0892031769c
JavaScript
const response = await fetch(`https://api.korzy.co/v1/records/${encodeURIComponent("25025-b5f09790f0892031769c")}`, {
  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);

Suffolk County data questions

How many parcels in Suffolk County include year built?
About 180,000 of about 200,000 parcel records (91%) include year built.
Does the Korzy API return owner names for Suffolk County parcels?
Suffolk 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 Suffolk County?
Korzy tracks 2 data-center projects in Suffolk County: 2 operating. A /v1/lookup with the datacenters section lists projects within 10 km of any address or point.
How much power generation is in Suffolk County?
About 10 operable power plants in Suffolk County total about 270 MW of nameplate capacity, mainly oil, natural gas and other fuels.
Which water systems serve Suffolk County?
Service areas of about 15 community water systems cover about 90% of Suffolk County, and sewer service areas cover about 94%. A /v1/lookup with the utilities section returns the water and sewer matches at an address or point.

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Build on Suffolk 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