Snohomish County, WA parcel and infrastructure data API
Korzy has about 310,000 parcel records for Snohomish County, Washington, with source updates through August 2026. Nearly every record carries values and land use. In and around the county the API also maps 4 data-center projects (2 operating); 1 port with reported cargo; and 4 power plants with about 130 MW of capacity, led by hydro. Look up any parcel by address or coordinates, then check water, sewer and infrastructure context at the same point.
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 /v1/records/{id}. Share of records with each field:
| Field | Coverage | Share |
|---|---|---|
| Situs address | Nearly all · 100% | |
| Owner name | Not published | |
| Assessed or market value | Nearly all · 97% | |
| Year built | Not published | |
| Building size | Not published | |
| Last sale | Not published | |
| Land use | Nearly all · 99% | |
| Zoning | Not published |
Snohomish County records do not include owner names. See pricing for credit costs.
Infrastructure in and around Snohomish County
Power plants
4 operable plants with about 130 MW of nameplate capacity; largest by capacity: hydro, other fuels, battery and pumped storage. Proposed generators add about 25 MW.
Within 50 km: /v1/lookup section power; details: /v1/records/{id}
Substations and transmission
About 140 in-service substations, about 10 rated 230 kV or higher.
About 970 miles of transmission lines: about 190 mi at under 100 kV; about 270 mi at 100–161 kV; about 340 mi at 220–287 kV; about 65 mi at 345 kV; about 110 mi at 500 kV.
Water and sewer service
Service areas of about 130 community water systems cover about 24% of the county.
Sewer service areas of about 15 systems cover about 9%.
At an address or point: /v1/lookup section utilities
Data-center projects
4 tracked projects: 2 operating, 2 status not reported. Reported operating capacity: about 10 MW.
Within 10 km: /v1/lookup section datacenters
Flood zones and wetlands
Special flood hazard areas cover about 7% of the county on the current federal flood maps, published September 2026.
Mapped wetlands cover about 3%.
At an address or point: /v1/lookup section environment
Rail, ports and freight
- About 170 miles of active rail, about 110 of it main line
- About 50 miles of national freight network highway
- 1 port area with reported cargo tonnage
Within 25 km: /v1/lookup section logistics
Example requests for Snohomish County
The lookup response is a real production response, trimmed to the main fields. Every request needs an API key with api:read; see authentication and credits and limits.
1. Find a parcel and its water and sewer service
/v1/lookup matches 3721 148TH ST SW, LYNNWOOD, WA and returns the parcel's korzy_id and record, plus the water and sewer service areas at the parcel and the nearest treatment plants. 2 credits.
curl --fail-with-body -sS \
-H "Authorization: Bearer $KORZY_API_KEY" \
-H "Content-Type: application/json" \
-d '{"address":"3721 148TH ST SW, LYNNWOOD, WA","sections":["utilities"]}' \
https://api.korzy.co/v1/lookupPython
import os
import requests
response = requests.post(
"https://api.korzy.co/v1/lookup",
json={"address": "3721 148TH ST SW, LYNNWOOD, WA", "sections": ["utilities"]},
headers={"Authorization": f"Bearer {os.environ['KORZY_API_KEY']}"},
timeout=60,
)
response.raise_for_status()
body = response.json()
parcel = body["parcels"]["records"][0]
print(parcel["korzy_id"], body["sections"]["utilities"]["status"])Production response (trimmed)
{
"location": {
"longitude": -122.28415902499498,
"latitude": 47.8645453,
"address": "3721 148TH ST SW, LYNNWOOD",
"match_type": "exact"
},
"parcels": {
"records": [
{
"id": "53061-8e554a525670f30fc4e6",
"korzy_id": "53061-8e554a525670f30fc4e6",
"parcelid": "00570300201100",
"parceladdr": "3721 148TH ST SW",
"parcelcity": "LYNNWOOD",
"situs_zip": "98087-5515",
"statefp": "53",
"geoid": "53061",
"longitude": -122.28415902499498,
"latitude": 47.8645453,
"land_use_code": "47",
"taxacres": 0.49,
"totalvalue": 1358600,
"land_value_usd": 749200,
"improvement_value_usd": 470300,
"updated": "2026-01-21"
}
],
"truncated": false
},
"sections": {
"utilities": {
"status": "ok",
"data": {
"water": [
{
"id": "utility:water:4654",
"feature_id": "water:4654",
"name": "ALDERWOOD WATER DISTRICT",
"boundary_basis": "System Sourced"
}
],
"treatment_plants": [
{
"id": "utility:treatment:9774",
"feature_id": "treatment:9774",
"name": "LYNNWOOD TREATMENT SYSTEM",
"distance_km": 4.527800841420176
},
{
"id": "utility:treatment:9787",
"feature_id": "treatment:9787",
"name": "Big Gulch WWTP",
"distance_km": 5.955811003537193
},
{
"id": "utility:treatment:9750",
"feature_id": "treatment:9750",
"name": "EDMONDS STP",
"distance_km": 9.58227943846949
}
],
"truncated": {
"water": false,
"sewer": false
}
},
"provenance": [
{
"dataset": "water",
"data_version": "63b7c1c3-9661-4fed-a59f-ddbfff80c2e4"
},
{
"dataset": "sewer",
"data_version": "63b7c1c3-9661-4fed-a59f-ddbfff80c2e4"
},
{
"dataset": "treatment",
"data_version": "63b7c1c3-9661-4fed-a59f-ddbfff80c2e4"
}
]
}
},
"credits": {
"charged": 2,
"refunded": 0
}
}2. Add value and sale fields
/v1/enrich returns the fields you choose for up to 25 parcels per request; here the parcel 53061-8e554a525670f30fc4e6. 1 credit.
curl --fail-with-body -sS \
-H "Authorization: Bearer $KORZY_API_KEY" \
-H "Content-Type: application/json" \
-d '{"items":[{"korzy_id":"53061-8e554a525670f30fc4e6"}],"fields":["identity","value","sale"]}' \
https://api.korzy.co/v1/enrich3. Fetch the record again by ID
/v1/records/{id} returns the stored parcel's full record, without owner fields. 1 credit.
curl --fail-with-body -sS \
-H "Authorization: Bearer $KORZY_API_KEY" \
https://api.korzy.co/v1/records/53061-8e554a525670f30fc4e6JavaScript
const response = await fetch(`https://api.korzy.co/v1/records/${encodeURIComponent("53061-8e554a525670f30fc4e6")}`, {
headers: { Authorization: `Bearer ${process.env.KORZY_API_KEY}` },
});
if (!response.ok) throw new Error(`Korzy API ${response.status}`);
const { record } = await response.json();
console.log(record.parceladdr, record.usedesc);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. A /v1/lookup with the datacenters section lists projects within 10 km of any address or 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%. A /v1/lookup with the utilities section returns the water and sewer matches at an address or point.
More featured counties
- King County, WABorders Snohomish County · about 630,000 parcels
Build on Snohomish County parcel data
Lookups, enrichment and records work the same in every county Korzy covers. Credits are shared across parcels, utilities, environment, logistics, power, grid, data-center and terrain sections.