Block Report

800 Block of Mercer St

66 properties on this block in Philadelphia.

View property grades, violation history, tax delinquencies, ownership transfers, title risk scores, and safety data for all 66 properties on the 800 Block of Mercer St.

About this block

The 800 block of Mercer St contains 66 properties tracked on KnowMyBlock, with an average grade of A. Construction dates range from 1920 to 1940. There are 1 open code violations across the block. The block has seen 98 ownership transfers in the last five years. 66 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 8% of its parcels.

All properties on this block (50)

Address	Year	Owner-occ	Grade
805 Mercer St	1925	Yes	A
807 Mercer St	1925	Yes	A
809 Mercer St	1925	Yes	A
810 Mercer St	1925	Yes	A
811 Mercer St	1925	Yes	A
812 Mercer St	1925	Yes	A
813 Mercer St	1925	Yes	A
814 Mercer St	1925	Yes	A
815 Mercer St	1925	Yes	A
816 Mercer St	1925	Yes	A

Show all 50 properties

Address	Year	Owner-occ	Grade
817 Mercer St	1925	Yes	A
818 Mercer St	1925	Yes	B
819 Mercer St	1940	Yes	A
820 Mercer St	1925	Yes	A
821 Mercer St	1925	Yes	A
822 Mercer St	1925	Yes	A
823 Mercer St	1925	Yes	A
824 Mercer St	1925	Yes	A
825 Mercer St	1925	Yes	A
826 Mercer St	1925	Yes	A
827 Mercer St	1925	Yes	A
828 Mercer St	1925	Yes	A
829 Mercer St	1925	Yes	A
830 Mercer St	1925	Yes	A
831 Mercer St	1925	Yes	A
832 Mercer St	1925	Yes	A
833 Mercer St	1925	Yes	A
834 Mercer St	1925	Yes	A
835 Mercer St	1925	Yes	A
836 Mercer St	1925	Yes	A
837 Mercer St	1925	Yes	A
838 Mercer St	1925	Yes	A
839 Mercer St	1925	Yes	B
840 Mercer St	1925	Yes	A
841 Mercer St	1925	Yes	A
842 Mercer St	1925	Yes	A
843 Mercer St	1925	Yes	A
844 Mercer St	1925	Yes	A
845 Mercer St	1925	Yes	A
846 Mercer St	1925	Yes	A
847 Mercer St	1925	Yes	A
848 Mercer St	1925	Yes	A
849 Mercer St	1925	Yes	A
850 Mercer St	1925	Yes	A
851 Mercer St	1925	Yes	A
852 Mercer St	1925	Yes	A
853 Mercer St	1925	Yes	A
854 Mercer St	1925	Yes	A
855 Mercer St	1925	Yes	A
856 Mercer St	1925	Yes	A

Recent block activity

2027-07-04License expired · 845 Mercer St
2026-10-20License expired · 843 Mercer St
2026-10-18License expired · 852 Mercer St
2026-07-06License expired · 814 Mercer St
2026-06-21Tax delinquency recorded · 836 Mercer St
2026-06-21Tax delinquency recorded · 864 Mercer St
2026-06-21Tax delinquency recorded · 818 Mercer St
2026-05-26License issued · 845 Mercer St
2026-03-13Transferred · 847 Mercer St
2026-03-12Transferred · 847 Mercer St
2026-03-11Transferred · 823 Mercer St
2026-03-06Transferred · 847 Mercer St

Block health comparison

Scope	Avg grade	Open viol/property
Block	A	0.02
Street	A	0.09
ZIP 19125	A	0.10
Citywide	—	—