Worst buildings in Park Slope, Brooklyn

713 Sackett Street has the most open HPD violations per 10 units of any graded rental building with 6 or more units in Park Slope: 242.9 per 10 units, 170 open in all, 39 of them class C.

Graded rental buildings with 6 or more units, ranked by open NYC HPD housing code violations per 10 units, the same rule as the citywide list. Co-ops, condos and public housing (NYCHA) are left out. Only buildings with an HPD violation issued in the last 24 months or a 311 housing complaint in the last 12 are listed. Class C means immediately hazardous. Records as of Oct 26, 2026.

#	Address	Units	Open per 10 units	Open violations	Grade	Owner
1	713 Sackett Street	7	242.9	170 (39 class C)	F	SACKETT SLOPE 713 LLC
2	226 7th Avenue	6	221.7	133 (19 class C)	F	226 7TH AVENUE INVESTORS LLC
3	752 Union Street	6	193.3	116 (13 class C)	F	210 6TH AVENUE LLC ASSOCIATES
4	335 3rd Street	8	152.5	122 (13 class C)	F	3RD STREET PROPERTIES LLC
5	548 11th Street	8	152.5	122 (63 class C)	F	Individual owner
6	367 5th Avenue	6	141.7	85 (15 class C)	F	367 5th Avenue Holdings LLC
7	1203 8th Avenue	8	130	104 (16 class C)	F	Not on file
8	154 7th Avenue	6	126.7	76 (13 class C)	F	Individual owner
9	334 8th Street	8	123.8	99 (8 class C)	F	Individual owner
10	279 5th Avenue	7	121.4	85 (6 class C)	F	skywind properties LLC
11	86 5th Avenue	6	108.3	65 (5 class C)	F	Not on file
12	685 Union Street	8	100	80 (18 class C)	F	Individual owner
13	138 Prospect Park West	10	94	94 (9 class C)	F	Individual owner
14	338 14th Street	8	92.5	74 (5 class C)	F	338 14TH ST LLC
15	399 12th Street	6	91.7	55 (3 class C)	D	Individual owner
16	179 7th Avenue	7	91.4	64 (10 class C)	F	179 7TH AVENUE LLC
17	673 Union Street	8	90	72 (1 class C)	D	Individual owner
18	547 6th Avenue	6	88.3	53 (4 class C)	D	Individual owner
19	140 5th Avenue	6	86.7	52 (6 class C)	F	URBAN STORIES I, LLC
20	443 1st Street	8	86.3	69 (0 class C)	D	443 REALTY LLC
21	349 12th Street	10	86	86 (23 class C)	F	Individual owner
22	344 14th Street	8	85	68 (14 class C)	F	344 J&S REALTY LLC
23	783 Union Street	8	82.5	66 (0 class C)	D	Individual owner
24	53 5th Avenue	6	81.7	49 (14 class C)	F	53 FIFTH PARTNERS LLC
25	481 4th Avenue	9	81.1	73 (6 class C)	F	EMAN REALTY LLC
26	691 Union Street	8	80	64 (21 class C)	F	691 UNION STREET LLC
27	230 St Johns Place	8	78.8	63 (19 class C)	F	Piazza 26 LLC
28	137 7th Avenue	6	76.7	46 (6 class C)	F	137 7TH AVE CORP
29	158 5th Avenue	9	72.2	65 (12 class C)	F	ADDA SLOPE REALTY LLC
30	305 7th Street	8	70	56 (9 class C)	F	MSG HOLDINGS LLC
31	239 14th Street	6	70	42 (10 class C)	F	239 14TH STREET REALTY LLC
32	263 14th Street	20	69	138 (48 class C)	F	SUNSHINE MANAGEMENT INC
33	315 4th Avenue	6	68.3	41 (17 class C)	F	4TH AVENUE PARTNERS, LLC
34	341 5th Avenue	6	66.7	40 (4 class C)	D	North Slop 341 Corp
35	374 7th Avenue	6	66.7	40 (0 class C)	D	Not on file
36	317 4th Avenue	8	66.3	53 (15 class C)	F	4TH AVENUE PARTMENERS,LLC
37	500 11th Street	8	66.3	53 (4 class C)	F	500 NY LLC
38	349 5th Avenue	7	65.7	46 (8 class C)	D	YAN YAN LLC
39	704 Sackett Street	8	65	52 (9 class C)	F	ADDA REALTY LLC
40	369 5th Avenue	6	65	39 (19 class C)	F	Individual owner
41	647 President Street	14	62.9	88 (16 class C)	F	PRESIDENT LLC
42	294 5th Avenue	7	61.4	43 (20 class C)	F	294 5TH AVENURE REALTY PARTNERS
43	221 Berkeley Place	8	60	48 (8 class C)	D	221 BERKELEY ASSOCIATES LLC
44	351 13th Street	8	58.8	47 (8 class C)	F	IMK REALTY LLC
45	121 8th Avenue	8	58.8	47 (15 class C)	F	Not on file
46	137 6th Avenue	6	58.3	35 (3 class C)	D	Individual owner
47	520 2nd Street	6	58.3	35 (2 class C)	D	520 2ND LLC
48	307 12th Street	25	57.2	143 (28 class C)	F	FLGSP 307 12 St LLC
49	234 8th Street	8	56.3	45 (2 class C)	F	BHNWN 8TH STREET LLC.
50	236 8th Street	8	55	44 (13 class C)	F	SLOPE PARK LLC
51	660 Carroll Street	8	53.8	43 (3 class C)	D	660 REALTY LLC
52	270 5th Avenue	6	53.3	32 (5 class C)	D	270 5TH AVE REALTY CORP
53	272 5th Avenue	6	53.3	32 (10 class C)	D	Individual owner
54	229 8th Street	6	53.3	32 (4 class C)	D	BROOKLYN LIVING LLC
55	138 7th Avenue	6	51.7	31 (6 class C)	F	138 7TH AVE CORP
56	45 5th Avenue	9	48.9	44 (5 class C)	F	FIFTH & BERGEN HDFC (City program owner (HDFC))
57	19 Berkeley Place	8	48.8	39 (1 class C)	D	Individual owner
58	619 Baltic Street	7	48.6	34 (2 class C)	D	CABBAD FAMILY LLC
59	135 6th Avenue	6	48.3	29 (1 class C)	D	Not on file
60	428 7th Avenue	6	48.3	29 (7 class C)	F	428 7TH AVENUE OWNER LLC
61	119 7th Avenue	6	48.3	29 (0 class C)	D	Individual owner
62	311 8th Street	16	47.5	76 (7 class C)	F	311 ROSLYN CT LLC
63	375 13th Street	8	47.5	38 (1 class C)	F	M U M HOLDING CORP
64	171 5th Avenue	7	47.1	33 (2 class C)	D	Individual owner
65	325 3rd Street	8	46.3	37 (6 class C)	D	325 THIRD STREET LLC
66	277 7th Street	20	45.5	91 (16 class C)	F	JOVIN III LLC
67	709 Union Street	8	45	36 (2 class C)	D	709 UNION STREET TENANTS ASSOCIATION
68	259 4th Avenue	8	45	36 (8 class C)	F	JAMAN REALTY LLC
69	400 8th Street	8	45	36 (0 class C)	D	Not on file
70	493 12th Street	16	43.8	70 (7 class C)	F	493 12TH ST ASSOCIATES LLC
71	515 6th Avenue	9	43.3	39 (25 class C)	F	331 HOLDINGS LLC.
72	695 Sackett Street	6	43.3	26 (2 class C)	D	695 SACKETT LLC
73	297 Garfield Place	10	43	43 (2 class C)	D	297 GARFIELD LLC
74	530 5th Street	8	42.5	34 (0 class C)	D	Not on file
75	512 9th Street	8	41.3	33 (4 class C)	D	Individual owner
76	550 11th Street	8	41.3	33 (3 class C)	D	550 11TH ST HOUSING LLC
77	530 6th Avenue	6	40	24 (9 class C)	D	TSA Management Co. Inc
78	172 Prospect Park West	9	38.9	35 (4 class C)	F	P.P.W. CORP
79	233 5th Avenue	8	37.5	30 (10 class C)	D	233 FIFTH AVENUE, LLC
80	93 St Johns Place	8	36.3	29 (2 class C)	F	Individual owner
81	296 12th Street	8	36.3	29 (14 class C)	D	BTR LLC
82	182 5th Avenue	7	35.7	25 (6 class C)	D	Not on file
83	25 7th Avenue	7	35.7	25 (0 class C)	D	Individual owner
84	118 Garfield Place	39	34.4	134 (11 class C)	F	GARFIELD FIRST ASSOCIATES LLC
85	359 12th Street	8	33.8	27 (18 class C)	F	359 12th LLC
86	319 4th Avenue	6	33.3	20 (1 class C)	D	319 4TH AVE HOUSING LLC
87	397 4th Avenue	6	33.3	20 (3 class C)	F	397 FOURTH LLC
88	140 6th Avenue	10	33	33 (4 class C)	D	Individual owner
89	111 5th Avenue	8	32.5	26 (5 class C)	D	CABBAD FAMILY LLC
90	223 7th Avenue	6	31.7	19 (0 class C)	B	Not on file
91	567 6th Street	16	31.3	50 (7 class C)	F	Individual owner
92	644 President Street	8	31.3	25 (3 class C)	D	Individual owner
93	161 Prospect Park West	8	31.3	25 (12 class C)	F	161 PPW LLC
94	770 Union Street	9	31.1	28 (9 class C)	F	770 UNION STR LTD PARTNERSHIP
95	280 14th Street	25	30	75 (23 class C)	F	12TH AND 14TH STREET INVESTOR, LLC
96	687 Union Street	8	30	24 (2 class C)	D	687 UNION STREET PROP LLC
97	543 4th Street	8	30	24 (2 class C)	D	543 4TH STREET LLC
98	371 5th Avenue	7	30	21 (0 class C)	C	Individual owner
99	109 5th Avenue	8	28.8	23 (9 class C)	D	CABBAD FAMILY LLC
100	461 3rd Street	8	28.8	23 (1 class C)	D	Individual owner

The full list for Park Slope, up to 100 buildings. Each row is the record, not a verdict.

More for Park Slope: rent-stabilized buildings, best buildings, heat complaints, and the Park Slope page.

Sources: NYC HPD housing maintenance code violations, HPD property registrations and housing litigation, 311 service requests, DOB violations, NYC Marshals evictions, and HPD bedbug filings from NYC Open Data, plus rent-stabilized unit counts from NYC Department of Finance tax bills. How grades work.