Block Report

1800 Block of S 21st St

33 properties on this block in Philadelphia.

View property grades, violation history, tax delinquencies, ownership transfers, title risk scores, and safety data for all 33 properties on the 1800 Block of S 21st St.

About this block

The 1800 block of S 21St St contains 33 properties tracked on KnowMyBlock, with an average grade of B. Construction dates range from 1920 to 1920. There are 11 open code violations across the block. The block has seen 42 ownership transfers in the last five years. 32 properties on the block were built before 1978 and may carry lead-paint risk under Philadelphia's lead disclosure ordinance. The top three property owners on this block control approximately 9% of its parcels.

All properties on this block (33)

AddressYearOpen violOwner-occGrade
1801 S 21st St19200YesA
1803 S 21st St19200YesA
1805 S 21st St19200YesA
1807 S 21st St19200YesA
1809 S 21st St19200YesA
1811 S 21st St19200YesA
1813 S 21st St19203YesF
1815 S 21st St19200YesA
1816 S 21st St19200YesB
1817 S 21st St19200YesA
Show all 33 properties
AddressYearOpen violOwner-occGrade
1818 S 21st St19200YesA
1819 S 21st St19201YesB
1820 S 21st St19200YesA
1821 S 21st St19200YesB
1822 S 21st St19200YesA
1823 S 21st St19200YesA
1824 S 21st St19200YesA
1825 S 21st St19200YesB
1826 S 21st St19200YesB
1828 S 21st St19200YesA
1829 S 21st St19204YesD
1830 S 21st St19200YesA
1831 S 21st St19200YesA
1832 S 21st St19200YesA
1833 S 21st St19200YesA
1834 S 21st St19200YesA
1835 S 21st St19200YesA
1836 S 21st St19200YesC
1837 S 21st St19200YesA
1838 S 21st St19200YesA
1839 S 21st St19200YesA
1840 S 21st St19200YesA
1841 S 21st St03YesF

Recent block activity

  1. 2026-07-05License expired · 1803 S 21st St
  2. 2026-06-22Complaint closed · 1829 S 21st St
  3. 2026-06-21Tax delinquency recorded · 1809 S 21st St
  4. 2026-06-21Tax delinquency recorded · 1821 S 21st St
  5. 2026-06-21Tax delinquency recorded · 1836 S 21st St
  6. 2026-06-18Complaint filed · 1829 S 21st St — Building Structurally Deficient (Occupied)
  7. 2026-06-09License expired · 1826 S 21st St
  8. 2026-03-18Permit issued · 1833 S 21st St — Addition And/Or Alterations
  9. 2026-03-16Permit issued · 1825 S 21st St — Ez Interior Non-Load-Bearing Wall Demo.
  10. 2026-03-11Transferred · 1841 S 21st St
  11. 2026-03-11Transferred · 1841 S 21st St
  12. 2026-03-01Tax delinquency recorded · 1824 S 21st St

Block health comparison

ScopeAvg gradeOpen viol/property
BlockB0.33
StreetA0.12
ZIP 19145A0.04
Citywide