Snohomish County, WA parcel and infrastructure data API

Parcel coverage in Snohomish County

About 310,000 parcel records with boundaries, situs addresses and parcel numbers, with the latest source update from August 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:

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

Infrastructure in and around Snohomish County

Example requests for Snohomish 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 10200 25TH AVE SE, EVERETT, WA 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=10200 25TH AVE SE, EVERETT, WA' \
  https://api.korzy.co/api/search

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/search",
    params={"q": "10200 25TH AVE SE, EVERETT, WA"},
    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": "53061-1837c10913fe59a0f6a9",
      "address": "10200 25TH AVE SE",
      "city": "EVERETT",
      "postcode": "98208",
      "county": "Snohomish",
      "statefp": "53",
      "longitude": -122.19887813610967,
      "latitude": 47.904255649999996,
      "match_type": "exact",
      "parcelid": "28052000200900",
      "parceladdr": "10200 25TH AVE SE",
      "parcelcity": "EVERETT",
      "situs_zip": "98208",
      "land_use_code": "68",
      "taxacres": 20.02,
      "totalvalue": 37966000,
      "land_value_usd": 13513500,
      "improvement_value_usd": 23952000,
      "updated": "2026-01-21",
      "geoid": "53061"
    }
  ],
  "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, 53061-1837c10913fe59a0f6a9, in records. 1 credit per 10 records requested.

curl --fail-with-body -sS --get \
  -H "Authorization: Bearer $KORZY_API_KEY" \
  --data-urlencode 'longitude=-122.198878' \
  --data-urlencode 'latitude=47.904256' \
  --data-urlencode 'limit=5' \
  https://api.korzy.co/api/query/point

const params = new URLSearchParams({"longitude": "-122.198878", "latitude": "47.904256", "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=-122.198878' \
  --data-urlencode 'latitude=47.904256' \
  https://api.korzy.co/api/utilities/context

import os
import requests

response = requests.get(
    "https://api.korzy.co/api/utilities/context",
    params={"longitude": "-122.198878", "latitude": "47.904256"},
    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": -122.198878,
  "latitude": 47.904256,
  "matches": {
    "water": [
      {
        "feature_id": "water:4655",
        "name": "EVERETT PUBLIC WORKS DEPT. CITY OF",
        "boundary_basis": "System Sourced"
      }
    ],
    "sewer": [
      {
        "feature_id": "sewer:3012",
        "name": "Everett WWTP",
        "boundary_basis": "Sourced"
      }
    ]
  },
  "nearby_treatment": [
    {
      "feature_id": "treatment:9813",
      "name": "Snohomish Wastewater System",
      "distance_km": 7.930148712815176
    },
    {
      "feature_id": "treatment:9787",
      "name": "Big Gulch WWTP",
      "distance_km": 9.011076754667027
    }
  ]
}

Snohomish County data questions

How many parcels in Snohomish County include values?

About 300,000 of about 310,000 parcel records (97%) include values.

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

Snohomish 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 Snohomish County?

Korzy tracks 4 data-center projects in Snohomish County: 2 operating and 2 status not reported. /api/datacenters/context lists projects within 10 km of any point.

How much power generation is in Snohomish County?

4 operable power plants in Snohomish County total about 130 MW of nameplate capacity, mainly hydro, other fuels and battery and pumped storage.

Which water systems serve Snohomish County?

Service areas of about 130 community water systems cover about 24% of Snohomish County, and sewer service areas cover about 9%. /api/utilities/context returns the water and sewer matches at a point.

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