Block Report

4500 Block of Knorr St

27 properties on this block in Philadelphia.

View property grades, violation history, tax delinquencies, ownership transfers, title risk scores, and safety data for all 27 properties on the 4500 Block of Knorr St.

About this block

The 4500 block of Knorr St contains 27 properties tracked on KnowMyBlock, with an average grade of A. Construction dates range from 1935 to 1935. There are currently no open code violations on the block. The block has seen 37 ownership transfers in the last five years. 27 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 11% of its parcels.

All properties on this block (27)

AddressYearOpen violOwner-occGrade
4500 Knorr St19350YesA
4501 Knorr St19350YesA
4502 Knorr St19350YesA
4503 Knorr St19350YesA
4504 Knorr St19350YesA
4505 Knorr St19350YesB
4506 Knorr St19350YesA
4507 Knorr St19350YesA
4508 Knorr St19350YesA
4509 Knorr St19350YesA
Show all 27 properties
AddressYearOpen violOwner-occGrade
4510 Knorr St19350YesA
4511 Knorr St19350YesA
4512 Knorr St19350YesA
4513 Knorr St19350YesA
4514 Knorr St19350YesA
4515 Knorr St19350YesB
4517 Knorr St19350YesA
4519 Knorr St19350YesA
4521 Knorr St19350YesA
4523 Knorr St19350YesA
4525 Knorr St19350YesA
4527 Knorr St19350YesA
4529 Knorr St19350YesA
4531 Knorr St19350YesA
4533 Knorr St19350YesA
4535 Knorr St19350YesB
4537 Knorr St19350YesB

Recent block activity

  1. 2027-02-20License expired · 4521 Knorr St
  2. 2026-08-18License expired · 4506 Knorr St
  3. 2026-06-21Tax delinquency recorded · 4505 Knorr St
  4. 2026-06-21Tax delinquency recorded · 4509 Knorr St
  5. 2026-01-09License issued · 4521 Knorr St
  6. 2025-09-19License issued · 4506 Knorr St
  7. 2025-08-14Violation resolved · 4527 Knorr St — PM15-308.1
  8. 2025-08-14Inspection · 4527 Knorr St
  9. 2025-08-13Transferred · 4503 Knorr St
  10. 2025-08-12Transferred · 4519 Knorr St
  11. 2025-06-17Transferred · 4507 Knorr St
  12. 2025-05-08Permit issued · 4513 Knorr St — Alterations

Block health comparison

ScopeAvg gradeOpen viol/property
BlockA0.00
StreetA0.05
ZIP 19135A0.11
Citywide