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Washington County, OR parcel and infrastructure data API

Korzy has about 190,000 parcel records for Washington County, Oregon, with source updates through November 2026. Nearly every record carries land use, year built and building size; 93% include values and 64% include last sale. In and around the county the API also maps about 45 data-center projects (20 operating and 2 under construction); 2 ports with reported cargo; and 5 power plants with about 100 MW of capacity, led by battery and pumped storage. Look up any parcel by address or coordinates, then check nearby data-center projects, utilities and grid context at the same point.

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Parcel coverage in Washington County

About 190,000 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:

FieldCoverageShare
Situs addressNearly all · 100%
Owner nameNot published
Assessed or market valueMost · 93%
Year builtNearly all · 100%
Building sizeNearly all · 100%
Last saleMany · 64%
Land useNearly all · 100%
ZoningNot published

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

Infrastructure in and around Washington County

Power plants

5 operable plants with about 100 MW of nameplate capacity; largest by capacity: battery and pumped storage, solar, other fuels.

Plant details: /api/power/plants/{plant_id}

Substations and transmission

About 95 in-service substations, 9 rated 230 kV or higher.

About 390 miles of transmission lines: about 10 mi at under 100 kV; about 280 mi at 100–161 kV; about 65 mi at 220–287 kV; about 35 mi at 500 kV.

Water and sewer service

Service areas of about 30 community water systems cover about 17% of the county.

Sewer service areas of 8 systems cover about 22%.

At a point: /api/utilities/context

Data-center projects

About 45 tracked projects: 20 operating, 2 under construction, 1 permitted, 6 proposed, 20 status not reported. Reported operating capacity: about 490 MW. Reported planned capacity: about 800 MW.

Within 10 km of a point: /api/datacenters/context

Flood zones and wetlands

Special flood hazard areas cover about 9% of the county on the current federal flood maps, published September 2026.

Rail, ports and freight

  • About 95 miles of active rail, about 75 of it main line
  • 7 miles of national freight network highway
  • 2 port areas with reported cargo tonnage

Within 25 km of a point: /api/logistics/context

Example requests for Washington 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 10500 NE WALKER RD, Beaverton, OR 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=10500 NE WALKER RD, Beaverton, OR' \
  https://api.korzy.co/api/search
Python
import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "10500 NE WALKER RD, Beaverton, OR"},
    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"])
Response (trimmed)
{
  "results": [
    {
      "korzy_id": "41067-9f162d3bfb9fe3ad211b",
      "address": "10500 NE WALKER RD",
      "city": "Beaverton",
      "postcode": "97006",
      "county": "Washington",
      "statefp": "41",
      "longitude": -122.87176787941605,
      "latitude": 45.527259799999996,
      "match_type": "exact",
      "parcelid": "1N2360004000",
      "parceladdr": "10500 NE WALKER RD",
      "parcelcity": "Beaverton",
      "situs_zip": "97006",
      "usedesc": "COM",
      "yearbuilt": 0,
      "bldgsqft": 0,
      "taxacres": 12.79,
      "totalvalue": 26276440,
      "saleamt": 226477,
      "geoid": "41067"
    }
  ],
  "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, 41067-9f162d3bfb9fe3ad211b, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-122.871768' \
  --data-urlencode 'latitude=45.52726' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point
JavaScript
const params = new URLSearchParams({"longitude": "-122.871768", "latitude": "45.52726", "limit": "5"});
const response = await fetch(`https://api.korzy.co/api/query/point?${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=-122.871768' \
  --data-urlencode 'latitude=45.52726' \
  --data-urlencode 'radius_km=10' \
  --data-urlencode 'limit=3' \
  https://api.korzy.co/api/datacenters/context
Python
import os
import requests

response = requests.get(
    "https://api.korzy.co/api/datacenters/context",
    params={"longitude": "-122.871768", "latitude": "45.52726", "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"])
Response (trimmed)
{
  "projects": [
    {
      "project_id": "dc_48f119bd51f7afb1cfe9",
      "name": "Hines Walker Road Data Center Site (10500 NE Walker Road, Hillsboro)",
      "operator": "Hines",
      "status": "proposed",
      "city": "Hillsboro",
      "state": "OR",
      "longitude": -122.87139,
      "latitude": 45.52707,
      "location_precision": "exact",
      "distance_km": 0.03624131221473513
    },
    {
      "project_id": "dc_7279cfc452ed4297ae1d",
      "name": "Data Center",
      "operator": "Oregon Health & Science University",
      "status": "unknown",
      "state": "OR",
      "longitude": -122.87550380877698,
      "latitude": 45.526698100000004,
      "location_precision": "footprint",
      "distance_km": 0.2976522077000695
    },
    {
      "project_id": "dc_b8721d7543b4f00629d5",
      "name": "Verizon Hillsboro (Tanasbourne) Data Center",
      "operator": "Verizon Business",
      "status": "unknown",
      "city": "Hillsboro",
      "state": "OR",
      "longitude": -122.88233642823195,
      "latitude": 45.5446031,
      "location_precision": "footprint",
      "distance_km": 2.096799221542074
    }
  ],
  "radius_km": 10,
  "limit": 3,
  "truncated": true
}

Washington County data questions

How many parcels in Washington County include year built?
About 190,000 of about 190,000 parcel records (100%) include year built.
Does the Korzy API return owner names for Washington County parcels?
Washington 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 Washington County?
Korzy tracks about 45 data-center projects in Washington County: 20 operating, 20 status not reported and 6 proposed. /api/datacenters/context lists projects within 10 km of any point.
How much power generation is in Washington County?
5 operable power plants in Washington County total about 100 MW of nameplate capacity, mainly battery and pumped storage, solar and other fuels.
Which water systems serve Washington County?
Service areas of about 30 community water systems cover about 17% of Washington County, and sewer service areas cover about 22%. /api/utilities/context returns the water and sewer matches at a point.

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Build on Washington County parcel data

Search, point and record lookups work the same in every county Korzy covers. Credits are shared across parcels, utilities, environment, logistics and data-center routes.

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