Rockingham County, NH parcel and infrastructure data API

Parcel coverage in Rockingham County

About 140,000 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 /api/parcel-record. Share of records with each field:

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

Infrastructure in and around Rockingham County

Example requests for Rockingham County

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 300 EXETER RD, Hampton, NH 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=300 EXETER RD, Hampton, NH' \
  https://api.korzy.co/api/search

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "300 EXETER RD, Hampton, NH"},
    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": "33015-5035ef89c076e24fdd75",
      "address": "300 EXETER RD",
      "city": "Hampton",
      "postcode": "03842",
      "county": "Rockingham",
      "statefp": "33",
      "longitude": -70.85574482819189,
      "latitude": 42.9554008,
      "match_type": "exact",
      "parcelid": "067-001-001",
      "parceladdr": "300 EXETER RD",
      "parcelcity": "Hampton",
      "situs_zip": "03842",
      "usedesc": "STORE/SHOP MDL-94",
      "land_use_code": "33",
      "yearbuilt": 2025,
      "bldgsqft": 2400,
      "taxacres": 1.35,
      "totalvalue": 741400,
      "saledate": "2024-07-24",
      "saleamt": 300000,
      "updated": "2026-11-03",
      "geoid": "33015"
    }
  ],
  "truncated": false
}

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, 33015-5035ef89c076e24fdd75, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-70.855745' \
  --data-urlencode 'latitude=42.955401' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point

const params = new URLSearchParams({"longitude": "-70.855745", "latitude": "42.955401", "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=-70.855745' \
  --data-urlencode 'latitude=42.955401' \
  https://api.korzy.co/api/utilities/context

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/utilities/context",
    params={"longitude": "-70.855745", "latitude": "42.955401"},
    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": -70.855745,
  "latitude": 42.955401,
  "matches": {
    "water": [
      {
        "feature_id": "water:42663",
        "name": "AQUARION WATER/NH",
        "boundary_basis": "System Sourced"
      }
    ],
    "sewer": []
  },
  "nearby_treatment": [
    {
      "feature_id": "treatment:2489",
      "name": "Hampton WWTF",
      "distance_km": 4.590092981990719
    },
    {
      "feature_id": "treatment:2488",
      "name": "Exeter WWTF",
      "distance_km": 8.615327711130702
    }
  ]
}

Rockingham County data questions

How many parcels in Rockingham County include year built?

About 120,000 of about 140,000 parcel records (85%) include year built.

Does the Korzy API return owner names for Rockingham County parcels?

Rockingham 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 Rockingham County?

Korzy tracks 4 data-center projects in Rockingham County: 3 operating and 1 status not reported. /api/datacenters/context lists projects within 10 km of any point.

How much power generation is in Rockingham County?

6 operable power plants in Rockingham County total about 3,100 MW of nameplate capacity, mainly nuclear, natural gas and battery and pumped storage.

Which water systems serve Rockingham County?

Service areas of about 210 community water systems cover about 12% of Rockingham County, and sewer service areas cover about 3%. /api/utilities/context returns the water and sewer matches at a point.

More featured counties

• Essex County, MABorders Rockingham County · about 270,000 parcels
• Hillsborough County, NHBorders Rockingham County · about 140,000 parcels

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