21 Union St
Auburn, NY 13021
3 bd 2 ba 1,506 sqft Built 1900 Lot 7,906 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 | $109,700 | $14,400 | $124,100 | $3,204 |
| 2024 | $109,700 | $14,400 | $124,100 | $2,889 |
| 2023 | $109,700 | $14,400 | $124,100 | $2,930 |
| 2022 | $71,800 | $13,200 | $85,000 | $2,817 |
| 2021 | $71,800 | $13,200 | $85,000 | $2,323 |
| 2020 | $71,800 | $13,200 | $85,000 | $2,300 |
| 2017 | $68,000 | $13,000 | $81,000 | $2,118 |
| 2016 | $63,600 | $13,800 | $77,400 | $2,490 |
| 2015 | $63,600 | $13,800 | $77,400 | $1,524 |
| 2014 | $63,600 | $13,800 | $77,400 | $2,319 |
| 2013 | $72,000 | $13,800 | $85,800 | $2,262 |
| 2012 | $72,000 | $13,800 | $85,800 | $1,674 |
| 2011 | $72,000 | $13,800 | $85,800 | $1,657 |
| 2010 | $61,300 | $11,500 | $72,800 | $1,604 |
| 2009 | $61,300 | $11,500 | $72,800 | $1,442 |
Property facts
Year built
1900
Property type
single_family
Stories
2
Beds
3
Baths
2
Living area
1,506 sqft
Lot size
7,906 sqft
ZIP code
13021
City
Auburn
Street
Union St
Coordinates
42.94237, -76.57591
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 21 Union St last sell?
No public-record sale is on file for 21 Union St.
What is the current tax assessment for 21 Union St?
The most recent total assessment for 21 Union St (year 2025) is $124,100 with $3,204 in property tax.
When was 21 Union St built?
21 Union St was built in 1900.
How does 21 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 21 Union St?
21 Union St is a 3 bed, 2 bath, 1,506 sqft, 7,906 sqft lot single_family.
Is 21 Union St a flip candidate?
No — 21 Union St does not appear in our flips dataset.
Is 21 Union St a tax-appeal candidate?
No — 21 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
-1.0%
Implied 1-yr
-4.1%
2026 Q3
$180.3K
2026 Q4
$178.3K
ZIP 13021 — Median Price History + Forecast
Explore nearby
Geography
Other properties on Union St