Parcel Identity
Ada County Assessor — Parcel Record 2026Law I · Provenance
APN
R8390000200
Property Type
Residential
Address
521 W UNION ST
City / State
BOISE, ID 83702-0000
Jurisdiction
Boise
ZIP Code
83702
Subdivision
THATCHERS ADD TO BOISE
Section
3N2E3
Zoning Code
R-1C/HD-O
Zoning Authority
City of Boise
Total Assessed Value
$877,100
Acreage
0.10 ac
Legal Description
W2 OF LOTS 4-6 INC · BLK 3 · THATCHERS ADD
43.622872° N, -116.194977° W
Ada County · Idaho · United States
Residential Characteristics
Ada County Assessor — Residential RecordLaw I · Provenance
Year Built
1910
Bedrooms
4
Bathrooms
2.5
Ground Floor
993 sqft
Upper Floor
794 sqft
Total Living
1,787 sqft
Garage
324 sqft
Heating
Yes
Air Conditioning
Yes
Fireplace
Yes
Deck
—
Patio
—
Land Characteristics
Ada County Assessor — Land RecordLaw I · Provenance
Residential Acres
0.10 ac
Commercial Acres
—
Water Source
Public
Sewer
Public
Sidewalks
Yes
Curb & Gutter
Yes
Corner Lot
Yes
Frontage
—
Assessed Value Record
Ada County Assessor — Assessment RecordLaw I · Provenance
Assessment Year
2025
Assessed Amount
$605,700
State Category
RES IMPROVEMENT
Active Status
● ACTIVE
State Code
410
Home Exemption
$-125,000
Root-LD Provenance Record
◈ Machine-Readable Provenance — refinery-treasurevalley-v1.0.0
Root-LD v1.0 · boisestandard.org
Federation ID
bs-tv-r8390000200
Entity Class
real-estate / residential
Primary Source
adacounty.id.gov/assessor
Collection Method
gis-extract · deterministic
Source Verified
✓ TRUE
Human Verified
Pending — claim to verify
Content Hash
a8ec3f0c3f75470f31b8a33f...
Minted At
2026-07-01
Recursive Edges
0 · Pending corpus pass
Pipeline
refinery-treasurevalley-v1.0.0
Law I — Every field traces to Ada County Assessor GIS open data ·
Law II — The timestamp is the record ·
Law VII — Any edge is an entry into the torus ·
Recursive layer pending Treasure Valley Corpus Pass