Ada County, ID parcel and infrastructure data API
Korzy has about 220,000 parcel records for Ada County, Idaho, with source updates through August 2026. Nearly every record carries values and land use. In and around the county the API also maps 8 data-center projects (5 operating and 1 under construction); about 10 power plants with about 550 MW of capacity, led by solar; and about 75 miles of active rail. Look up any parcel by address or coordinates, then check nearby data-center projects, utilities and grid context at the same point.
Parcel coverage in Ada County
About 220,000 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:
| Field | Coverage | Share |
|---|---|---|
| Situs address | Nearly all · 99% | |
| Owner name | Not published | |
| Assessed or market value | Nearly all · 99% | |
| Year built | Not published | |
| Building size | Not published | |
| Last sale | Not published | |
| Land use | Nearly all · 99% | |
| Zoning | Not published |
Ada County records do not include owner names. See pricing for credit costs.
Infrastructure in and around Ada County
Power plants
About 10 operable plants with about 550 MW of nameplate capacity; largest by capacity: solar, battery and pumped storage, hydro. Proposed generators add about 680 MW.
Plant details: /api/power/plants/{plant_id}
Substations and transmission
About 55 in-service substations, 7 rated 230 kV or higher.
About 480 miles of transmission lines: about 30 mi at under 100 kV; about 230 mi at 100–161 kV; about 190 mi at 220–287 kV; about 30 mi at 500 kV.
Water and sewer service
Service areas of about 40 community water systems cover about 20% of the county.
Sewer service areas of 5 systems cover about 23%.
At a point: /api/utilities/context
Data-center projects
8 tracked projects: 5 operating, 1 under construction, 2 proposed. Reported operating capacity: about 150 MW. Reported planned capacity: about 610 MW.
Within 10 km of a point: /api/datacenters/context
Flood zones and wetlands
Special flood hazard areas cover about 3% of the county on the current federal flood maps, published October 2026.
Mapped wetlands cover about 1%.
Rail, ports and freight
- About 75 miles of active rail, about 45 of it main line
- About 35 miles of national freight network highway
Within 25 km of a point: /api/logistics/context
Example requests for Ada 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 11715 W KING ST BOISE, ID 83713 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=11715 W KING ST BOISE, ID 83713' \
https://api.korzy.co/api/searchPython
import os
import requests
response = requests.get(
"https://api.korzy.co/api/search",
params={"q": "11715 W KING ST BOISE, ID 83713"},
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": "16001-a7ae2e586e33dcab9822",
"address": "11715 W KING ST BOISE, ID 83713-0000",
"postcode": "83713",
"county": "Ada",
"statefp": "16",
"longitude": -116.32866924970423,
"latitude": 43.62030635,
"match_type": "exact",
"parcelid": "S1103346900",
"parceladdr": "11715 W KING ST BOISE, ID 83713-0000",
"situs_zip": "83713",
"usedesc": "Commercial",
"taxacres": 1.8899999856948853,
"totalvalue": 0,
"updated": "2025-04-16",
"geoid": "16001"
}
],
"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, 16001-a7ae2e586e33dcab9822, in records. 1 credit per 10 records requested.
curl --fail-with-body -sS --get \
-H "Authorization: Bearer $KORZY_API_KEY" \
--data-urlencode 'longitude=-116.328669' \
--data-urlencode 'latitude=43.620306' \
--data-urlencode 'limit=5' \
https://api.korzy.co/api/query/pointJavaScript
const params = new URLSearchParams({"longitude": "-116.328669", "latitude": "43.620306", "limit": "5"});
const response = await fetch(`https://api.korzy.co/api/query/point?${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=-116.328669' \
--data-urlencode 'latitude=43.620306' \
--data-urlencode 'radius_km=10' \
--data-urlencode 'limit=3' \
https://api.korzy.co/api/datacenters/contextPython
import os
import requests
response = requests.get(
"https://api.korzy.co/api/datacenters/context",
params={"longitude": "-116.328669", "latitude": "43.620306", "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_455a5d124b88111912b1",
"name": "ValorC3 Boise Data Center (former Fiberpipe)",
"operator": "ValorC3 Data Centers",
"status": "operating",
"city": "Boise",
"state": "ID",
"longitude": -116.310153,
"latitude": 43.60801,
"location_precision": "approximate",
"operational_mw": 2,
"distance_km": 2.0227176888679375
},
{
"project_id": "dc_2286ecaba75697cbd5c3",
"name": "ValorC3 Boise 2",
"operator": "ValorC3 Data Centers",
"status": "under_construction",
"city": "Boise",
"state": "ID",
"longitude": -116.30185,
"latitude": 43.60955,
"location_precision": "approximate",
"planned_mw": 10,
"distance_km": 2.4681840116136
},
{
"project_id": "dc_65c5bddca3910cc43d05",
"name": "Centeris Boise (former HP / DataSite data center)",
"operator": "Centeris (The Benaroya Company)",
"status": "operating",
"city": "Boise",
"state": "ID",
"longitude": -116.303601,
"latitude": 43.606214,
"location_precision": "approximate",
"distance_km": 2.555044748748562
}
],
"radius_km": 10,
"limit": 3,
"truncated": true
}Ada County data questions
- How many parcels in Ada County include values?
- About 220,000 of about 220,000 parcel records (99%) include values.
- Does the Korzy API return owner names for Ada County parcels?
- Ada 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 Ada County?
- Korzy tracks 8 data-center projects in Ada County: 5 operating, 2 proposed and 1 under construction. /api/datacenters/context lists projects within 10 km of any point.
- How much power generation is in Ada County?
- About 10 operable power plants in Ada County total about 550 MW of nameplate capacity, mainly solar, battery and pumped storage and hydro.
- Which water systems serve Ada County?
- Service areas of about 40 community water systems cover about 20% of Ada County, and sewer service areas cover about 23%. /api/utilities/context returns the water and sewer matches at a point.
Build on Ada 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.