Block Report

4100 Block of J St

36 properties on this block in Philadelphia.

View property grades, violation history, tax delinquencies, ownership transfers, title risk scores, and safety data for all 36 properties on the 4100 Block of J St.

About this block

The 4100 block of J St contains 37 properties tracked on KnowMyBlock, with an average grade of A. Construction dates range from 1960 to 1960. There are 1 open code violations across the block. The block has seen 33 ownership transfers in the last five years. 37 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 16% of its parcels.

All properties on this block (37)

AddressYearOpen violOwner-occGrade
4108 J St19600YesA
4109-15 J St19600YesA
4110 J St19600YesA
4112 J St19600YesA
4114 J St19600YesA
4116 J St19600YesA
4117 J St19600YesA
4118 J St19600YesA
4119 J St19600YesA
4120 J St19600YesA
Show all 37 properties
AddressYearOpen violOwner-occGrade
4121 J St19600YesA
4122 J St19600YesA
4123 J St19600YesA
4124 J St19600YesA
4125 J St19600YesA
4126 J St19601YesB
4127 J St19600YesA
4128 J St19600YesA
4129 J St19600YesA
4130 J St19600YesA
4131 J St19600YesA
4132 J St19600YesA
4133 J St19600YesA
4134 J St19600YesA
4135 J St19600YesA
4136 J St19600YesB
4137 J St19600YesA
4138 J St19600YesA
4139 J St19600YesA
4140 J St19600YesA
4141 J St19600YesA
4142 J St19600YesA
4143 J St19600YesA
4145 J St19600YesA
4147 J St19600YesA
4149 J St19600YesA
4151 J St19600YesA

Recent block activity

  1. 2026-10-21License expired · 4120 J St
  2. 2026-10-21License expired · 4110 J St
  3. 2026-09-05License expired · 4137 J St
  4. 2026-08-23License expired · 4141 J St
  5. 2026-06-21Tax delinquency recorded · 4136 J St
  6. 2026-04-16Transferred · 4147 J St
  7. 2026-04-09Inspection · 4126 J St
  8. 2026-03-01Tax delinquency recorded · 4136 J St
  9. 2026-02-04License issued · 4110 J St
  10. 2026-01-30License issued · 4120 J St
  11. 2025-11-05Transferred · 4147 J St
  12. 2025-10-09Transferred · 4147 J St

Block health comparison

ScopeAvg gradeOpen viol/property
BlockA0.03
StreetA0.01
ZIP 19124A0.18
Citywide