Adams County, CO parcel and infrastructure data API

Parcel coverage in Adams County

About 190,000 parcel records with boundaries, situs addresses and parcel numbers, with the latest source update from April 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:

Owner name and mailing address are returned with include_owner=true, which doubles a request's cost: a parcel record costs 2 credits instead of 1. 99% of Adams County records carry an owner name.

Infrastructure in and around Adams County

Example requests for Adams 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 10680 RIVERDALE RD, THORNTON, CO 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=10680 RIVERDALE RD, THORNTON, CO' \
  https://api.korzy.co/api/search

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "10680 RIVERDALE RD, THORNTON, CO"},
    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": "08001-05298c181b72683bb8fa",
      "address": "10680 RIVERDALE RD",
      "city": "THORNTON",
      "postcode": "80233",
      "county": "Adams",
      "statefp": "08",
      "longitude": -104.92480972939312,
      "latitude": 39.888325949999995,
      "match_type": "exact",
      "parcelid": "0172107400014",
      "parceladdr": "10680 RIVERDALE RD",
      "parcelcity": "THORNTON",
      "situs_zip": "80233",
      "usedesc": "Exempt",
      "taxacres": 45.842,
      "totalvalue": 0,
      "assessed_value_usd": 7430,
      "market_value_usd": 27510,
      "saledate": "2004-10-07",
      "saleamt": 888000,
      "updated": "2026-04-23",
      "geoid": "08001"
    }
  ],
  "truncated": false
}

With include_owner=true (2 credits) the record adds owner fields, shown here as placeholders:

{
  "owner_name": "EXAMPLE HOLDINGS LLC",
  "owner_mailing_address": "100 EXAMPLE ST, SAMPLE CITY, ST 00000"
}

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, 08001-05298c181b72683bb8fa, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-104.92481' \
  --data-urlencode 'latitude=39.888326' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point

const params = new URLSearchParams({"longitude": "-104.92481", "latitude": "39.888326", "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=-104.92481' \
  --data-urlencode 'latitude=39.888326' \
  https://api.korzy.co/api/utilities/context

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/utilities/context",
    params={"longitude": "-104.92481", "latitude": "39.888326"},
    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": -104.92481,
  "latitude": 39.888326,
  "matches": {
    "water": [
      {
        "feature_id": "water:38506",
        "name": "THORNTON CITY OF",
        "boundary_basis": "System Sourced"
      }
    ],
    "sewer": [
      {
        "feature_id": "sewer:4738",
        "name": "Metro Wastewater Reclamation District",
        "boundary_basis": "Modeled"
      }
    ]
  },
  "nearby_treatment": [
    {
      "feature_id": "treatment:314",
      "name": "South Adams County WSD",
      "distance_km": 2.112400444929519
    },
    {
      "feature_id": "treatment:492",
      "name": "Westminster Big Dry Creek WWTF",
      "distance_km": 8.11082436246136
    }
  ]
}

Adams County data questions

How many parcels in Adams County include last sale?

About 170,000 of about 190,000 parcel records (92%) include last sale.

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

Yes. 99% of Adams County parcel records carry an owner name. Add include_owner=true to a point, search or parcel-record request; it doubles the request's cost, so a single parcel record costs 2 credits.

How many data-center projects are in Adams County?

Korzy tracks 2 data-center projects in Adams County: 1 proposed and 1 status not reported. /api/datacenters/context lists projects within 10 km of any point.

How much power generation is in Adams County?

About 30 operable power plants in Adams County total about 1,800 MW of nameplate capacity, mainly natural gas, battery and pumped storage and solar.

Which water systems serve Adams County?

Service areas of about 45 community water systems cover about 16% of Adams County, and sewer service areas cover about 18%. /api/utilities/context returns the water and sewer matches at a point.

More featured counties

• Arapahoe County, COBorders Adams County · about 230,000 parcels
• Denver County, COBorders Adams County · about 240,000 parcels
• Jefferson County, COBorders Adams County · about 260,000 parcels
• Douglas County, COabout 160,000 parcels

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