Block Report

800 Block of S 51st St

32 properties on this block in Philadelphia.

View property grades, violation history, tax delinquencies, ownership transfers, title risk scores, and safety data for all 32 properties on the 800 Block of S 51st St.

About this block

The 800 block of S 51St St contains 34 properties tracked on KnowMyBlock, with an average grade of A. Construction dates range from 1920 to 2024. There are currently no open code violations on the block. The block has seen 48 ownership transfers in the last five years. 33 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 15% of its parcels.

All properties on this block (34)

Address	Year	Owner-occ	Grade
808 S 51st St	1925	Yes	A
809 S 51st St	1925	Yes	A
810 S 51st St	1925	Yes	A
811R S 51st St	1940	Yes	A
811 S 51st St	1925	Yes	A
812 S 51st St	1925	Yes	A
813 S 51st St	1925	Yes	B
814 S 51st St	1925	Yes	A
815 S 51st St	1925	Yes	A
816 S 51st St	1925	Yes	B

Show all 34 properties

Address	Year	Owner-occ	Grade
817 S 51st St	1925	Yes	B
818 S 51st St	1920	Yes	A
819 S 51st St	1925	Yes	C
821 S 51st St	1925	Yes	A
823 S 51st St	1925	Yes	A
824 S 51st St	1925	Yes	A
825 S 51st St	1925	Yes	A
826 S 51st St	1925	Yes	A
827 S 51st St	1925	Yes	A
828 S 51st St	1965	Yes	B
829 S 51st St	1925	Yes	B
830 S 51st St	1925	Yes	A
831 S 51st St	1925	Yes	A
832 S 51st St	1925	Yes	A
833 S 51st St	1925	Yes	A
834 S 51st St	1925	Yes	A
835 S 51st St	1925	Yes	A
836 S 51st St	1925	Yes	A
837 S 51st St	1925	Yes	A
838 S 51st St	2024	Yes	A
839 S 51st St	1925	Yes	B
840-42 S 51st St	1925	Yes	A
841 S 51st St	1965	Yes	A
844 S 51st St	1925	Yes	A

Recent block activity

2027-02-28License expired · 824 S 51st St
2027-02-28License expired · 830 S 51st St
2026-12-29License expired · 837 S 51st St
2026-06-21Tax delinquency recorded · 819 S 51st St
2026-06-21Tax delinquency recorded · 839 S 51st St
2026-06-21Tax delinquency recorded · 809 S 51st St
2026-06-21Tax delinquency recorded · 829 S 51st St
2026-05-21Inspection · 818 S 51st St
2026-05-13Inspection · 818 S 51st St
2026-03-26Permit issued · 818 S 51st St — Alterations
2026-03-18License issued · 830 S 51st St
2026-03-01Tax delinquency recorded · 819 S 51st St

Block health comparison

Scope	Avg grade	Open viol/property
Block	A	0.00
Street	A	0.29
ZIP 19143	A	0.22
Citywide	—	—