523 21st St
Allentown, PA 18104
5 bd 3 ba 2,098 sqft Built 1930 Lot 2,520 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 |
|---|---|---|---|---|
| 2026 | $145,500 | $10,200 | $155,700 | $5,037 |
| 2024 | $145,500 | $10,200 | $155,700 | $7,778 |
| 2023 | $145,500 | $10,200 | $155,700 | $7,778 |
| 2022 | $145,500 | $10,200 | $155,700 | $4,824 |
| 2021 | $145,500 | $10,200 | $155,700 | $4,727 |
| 2020 | $145,500 | $10,200 | $155,700 | $4,602 |
| 2019 | $145,500 | $10,200 | $155,700 | $4,526 |
| 2018 | $145,500 | $10,200 | $155,700 | $4,232 |
| 2017 | $145,500 | $10,200 | $155,700 | $4,124 |
| 2016 | $145,500 | $10,200 | $155,700 | $4,130 |
| 2015 | $145,500 | $10,200 | $155,700 | $4,134 |
| 2014 | $145,500 | $10,200 | $155,700 | $6,160 |
| 2013 | $145,500 | $10,200 | $155,700 | $6,043 |
| 2012 | $40,650 | $4,950 | $45,600 | $46,011 |
| 2011 | $40,650 | $4,950 | $45,600 | $3,420 |
| 2010 | $40,650 | $4,950 | $45,600 | $3,110 |
| 2009 | $40,650 | $4,950 | $45,600 | $3,110 |
| 2008 | $40,650 | $4,950 | $45,600 | $3,110 |
Property facts
Year built
1930
Property type
single_family
Stories
3
Beds
5
Baths
3
Living area
2,098 sqft
Lot size
2,520 sqft
ZIP code
18104
City
Allentown
Street
21st St
Coordinates
40.60206, -75.50399
Comparable properties nearby
Block-level micro-comps
Same street, ±3 house numbers, sold in the last 24 monthsFrequently asked questions
When did 523 21st St last sell?
No public-record sale is on file for 523 21st St.
What is the current tax assessment for 523 21st St?
The most recent total assessment for 523 21st St (year 2026) is $155,700 with $5,037 in property tax.
When was 523 21st St built?
523 21st St was built in 1930.
How does 523 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 523 21st St?
523 21st St is a 5 bed, 3 bath, 2,098 sqft, 2,520 sqft lot single_family.
Is 523 21st St a flip candidate?
No — 523 21st St does not appear in our flips dataset.
Is 523 21st St a tax-appeal candidate?
No — 523 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