Douglas County, CO parcel and infrastructure data API

Parcel coverage in Douglas County

About 160,000 parcel records with boundaries, situs addresses and parcel numbers, with the latest source update from June 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 Douglas County records carry an owner name.

Infrastructure in and around Douglas County

Example requests for Douglas 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 6399 STABLE VIEW STREET, CASTLE PINES, 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=6399 STABLE VIEW STREET, CASTLE PINES, CO' \
  https://api.korzy.co/api/search

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "6399 STABLE VIEW STREET, CASTLE PINES, 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": "08035-02ba3d17034161c0c1a5",
      "address": "6399 STABLE VIEW STREET",
      "city": "CASTLE PINES",
      "postcode": "80108",
      "county": "Douglas",
      "statefp": "08",
      "longitude": -104.85841398192215,
      "latitude": 39.45516005,
      "match_type": "exact",
      "parcelid": "235111303016",
      "parceladdr": "6399 STABLE VIEW STREET",
      "parcelcity": "CASTLE PINES",
      "situs_zip": "80108",
      "usedesc": "Exempt",
      "taxacres": 0.214,
      "totalvalue": 70,
      "assessed_value_usd": 70,
      "market_value_usd": 257,
      "saledate": "2020-12-30",
      "updated": "2026-04-21",
      "geoid": "08035"
    }
  ],
  "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, 08035-02ba3d17034161c0c1a5, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-104.858414' \
  --data-urlencode 'latitude=39.45516' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point

const params = new URLSearchParams({"longitude": "-104.858414", "latitude": "39.45516", "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 nearby data-center projects

/api/datacenters/context lists data-center projects within 10 km of the point, nearest first. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-104.858414' \
  --data-urlencode 'latitude=39.45516' \
  --data-urlencode 'radius_km=10' \
  --data-urlencode 'limit=3' \
  https://api.korzy.co/api/datacenters/context

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/datacenters/context",
    params={"longitude": "-104.858414", "latitude": "39.45516", "radius_km": "10", "limit": "3"},
    headers={"Authorization": f"Bearer {os.environ['KORZY_API_KEY']}"},
    timeout=30,
)
response.raise_for_status()
for project in response.json()["projects"]:
    print(project["name"], project["status"], project["distance_km"])

{
  "projects": [],
  "radius_km": 10,
  "limit": 3,
  "truncated": false
}

Douglas County data questions

How many parcels in Douglas County include last sale?

About 1,600 of about 160,000 parcel records (1%) include last sale.

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

Yes. 99% of Douglas 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 Douglas County?

Korzy tracks 7 data-center projects in Douglas County: 5 operating, 1 under construction and 1 status not reported. /api/datacenters/context lists projects within 10 km of any point.

How much power generation is in Douglas County?

2 operable power plants in Douglas County total 4 MW of nameplate capacity, mainly hydro.

Which water systems serve Douglas County?

Service areas of about 40 community water systems cover about 23% of Douglas County, and sewer service areas cover about 29%. /api/utilities/context returns the water and sewer matches at a point.

More featured counties

• Arapahoe County, COBorders Douglas County · about 230,000 parcels
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