321 Union St
Sun Prairie, WI 53590
2 bd 2 ba 1,178 sqft Built 1900 Lot 14,375 sqft single_family
No recorded sales
Location
Timeline: Sale, Listing & Tax History
Recorded events
No recorded events
No sale or listing events are on file for this property.
Tax assessment history
| Year | Building | Land | Total assessed | Tax paid |
|---|---|---|---|---|
| 2025 | $183,100 | $60,100 | $243,200 | $4,739 |
| 2023 | $183,100 | $60,100 | $243,200 | $4,066 |
| 2022 | $124,300 | $61,400 | $185,700 | $3,861 |
| 2021 | $118,300 | $61,400 | $179,700 | $3,639 |
| 2020 | $118,300 | $61,400 | $179,700 | $3,765 |
| 2019 | $96,300 | $53,500 | $149,800 | $3,506 |
| 2018 | $96,300 | $53,500 | $149,800 | $3,265 |
| 2017 | $96,300 | $53,500 | $149,800 | $3,160 |
| 2016 | $84,200 | $46,900 | $131,100 | $3,042 |
| 2015 | $84,200 | $46,900 | $131,100 | $2,961 |
| 2014 | $77,000 | $46,900 | $123,900 | $2,809 |
| 2013 | $68,200 | $46,900 | $115,100 | $2,732 |
| 2012 | $78,100 | $48,900 | $127,000 | $2,843 |
| 2011 | $78,100 | $48,900 | $127,000 | $2,913 |
| 2010 | $77,600 | $48,900 | $126,500 | $2,701 |
| 2008 | $78,400 | $48,900 | $127,300 | $2,518 |
| 2007 | $78,400 | $48,900 | $127,300 | $2,503 |
Property facts
Year built
1900
Property type
single_family
Stories
2
Beds
2
Baths
2
Living area
1,178 sqft
Lot size
14,375 sqft
ZIP code
53590
City
Sun Prairie
Street
Union St
Coordinates
43.18739, -89.21835
Comparable properties nearby
Frequently asked questions
When did 321 Union St last sell?
No public-record sale is on file for 321 Union St.
What is the current tax assessment for 321 Union St?
The most recent total assessment for 321 Union St (year 2025) is $243,200 with $4,739 in property tax.
When was 321 Union St built?
321 Union St was built in 1900.
How does 321 Union St compare to others on Union St?
We track 8 other properties on Union St. Browse the list under "Other properties on Union St" to compare beds, baths, and sale history.
What are the property facts for 321 Union St?
321 Union St is a 2 bed, 2 bath, 1,178 sqft, 14,375 sqft lot single_family.
Is 321 Union St a flip candidate?
No — 321 Union St does not appear in our flips dataset.
Is 321 Union St a tax-appeal candidate?
No — 321 Union St is not currently flagged as a tax-appeal candidate.
Forecast for this area
ZIP-area linear projection — not a per-property automated valuationQuarterly trend
+3.8%
Implied 1-yr
+15.0%
2026 Q3
$527.9K
2026 Q4
$543.9K
ZIP 53590 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Union St