521 21st St
Allentown, PA 18104
4 bd 2 ba 2,226 sqft Built 1930 Lot 2,520 sqft multi_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 |
|---|---|---|---|---|
| 2026 | $124,300 | $10,200 | $134,500 | $4,378 |
| 2024 | $124,300 | $10,200 | $134,500 | $6,719 |
| 2023 | $124,300 | $10,200 | $134,500 | $6,719 |
| 2022 | $124,300 | $10,200 | $134,500 | $4,194 |
| 2021 | $124,300 | $10,200 | $134,500 | $4,109 |
| 2020 | $124,300 | $10,200 | $134,500 | $4,001 |
| 2019 | $124,300 | $10,200 | $134,500 | $3,936 |
| 2018 | $124,300 | $10,200 | $134,500 | $3,677 |
| 2017 | $124,300 | $10,200 | $134,500 | $3,583 |
| 2016 | $124,300 | $10,200 | $134,500 | $3,589 |
| 2015 | $124,300 | $10,200 | $134,500 | $3,592 |
| 2014 | $124,300 | $10,200 | $134,500 | $5,321 |
| 2013 | $124,300 | $10,200 | $134,500 | $5,220 |
| 2012 | $41,800 | $4,950 | $46,750 | $47,171 |
| 2011 | $41,800 | $4,950 | $46,750 | $3,501 |
| 2010 | $39,950 | $4,950 | $44,900 | $3,065 |
| 2009 | $39,950 | $4,950 | $44,900 | $3,065 |
| 2008 | $39,950 | $4,950 | $44,900 | $3,065 |
Property facts
Year built
1930
Property type
multi_family
Stories
3
Beds
4
Baths
2
Living area
2,226 sqft
Lot size
2,520 sqft
ZIP code
18104
City
Allentown
Street
21st St
Coordinates
40.60201, -75.50396
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 521 21st St last sell?
No public-record sale is on file for 521 21st St.
What is the current tax assessment for 521 21st St?
The most recent total assessment for 521 21st St (year 2026) is $134,500 with $4,378 in property tax.
When was 521 21st St built?
521 21st St was built in 1930.
How does 521 21st St compare to others on 21st St?
We track 8 other properties on 21st St. Browse the list under "Other properties on 21st St" to compare beds, baths, and sale history.
What are the property facts for 521 21st St?
521 21st St is a 4 bed, 2 bath, 2,226 sqft, 2,520 sqft lot multi_family.
Is 521 21st St a flip candidate?
No — 521 21st St does not appear in our flips dataset.
Is 521 21st St a tax-appeal candidate?
No — 521 21st 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
+4.5%
Implied 1-yr
+17.9%
2026 Q3
$584.7K
2026 Q4
$605K
ZIP 18104 — Median Price History + Forecast
Explore nearby
Geography
Other properties on 21st St