NYC's 50 Worst-Ranked Landlord Portfolios

Ranked by open HPD violations per residential unit across portfolios with ≥50 units and ≥2 buildings. Data drawn from HPD registrations, 311 complaints, DOHMH rodent inspections, and eviction records. If you're considering signing a lease with a landlord who manages multiple buildings, check this list first.

Analysis as of June 21, 2026 · Open violations only — resolved violations are excluded from the dataset used for this ranking

Portfolio groupings are produced algorithmically and may contain matching errors — this is a known limitation of automated ownership-matching, including JustFix's own Who Owns What, which uses a similar method. All violation, complaint, and inspection figures are drawn directly from official NYC Open Data. If you believe a portfolio grouping is incorrect, contact us.
# Name(s) VPU ↓ HPD Violations 311 Complaints Rodent Failures Evictions ECB Violations Buildings Units
All registered names: RAFAEL GADOLIAN · RAFI GADOLIAN · SAM ROSH · SAMUEL ROSHGADOLIAN
HPD Violations / Unit
13.246 (ranking metric)
Open HPD Violations
808
311 Complaints
756
Rodent Inspection Failures
65 since 2017
Evictions Executed
3 since 2017
DOB Active ECB Violations
15
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
55registered as of 2023 · self-reported
Portfolio Size
4 buildings · 61 units
All registered names: YONATAN BADHUMI · YONATAN BAHUMI
HPD Violations / Unit
12.857 (ranking metric)
Open HPD Violations
2,250
311 Complaints
1,904
Rodent Inspection Failures
512 since 2017
Evictions Executed
60 since 2017
DOB Active ECB Violations
49
DOB Major Permits
17 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
Portfolio Size
55 buildings · 175 units
All registered names: ABRAHAM ROMER · ATIN BATRA · NOGA ROMER · RAJAN BATRA
HPD Violations / Unit
10.210 (ranking metric)
Open HPD Violations
1,021
311 Complaints
1,155
Rodent Inspection Failures
215 since 2017
Evictions Executed
27 since 2017
DOB Active ECB Violations
21
DOB Major Permits
17 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
9registered as of 2023 · self-reported
Portfolio Size
27 buildings · 100 units
HPD Violations / Unit
10.200 (ranking metric)
Open HPD Violations
612
311 Complaints
1,388
Rodent Inspection Failures
35 since 2017
Evictions Executed
9 since 2017
DOB Active ECB Violations
58
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
Portfolio Size
13 buildings · 60 units
HPD Violations / Unit
9.966 (ranking metric)
Open HPD Violations
578
311 Complaints
975
Rodent Inspection Failures
13 since 2017
Evictions Executed
0 since 2017
DOB Active ECB Violations
16
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
13registered as of 2023 · self-reported
Portfolio Size
2 buildings · 58 units
All registered names: AARON WEXLER · JORGE JIMENEZ · JOSE BERRIDO · RAMON ARIZA
HPD Violations / Unit
8.400 (ranking metric)
Open HPD Violations
924
311 Complaints
663
Rodent Inspection Failures
148 since 2017
Evictions Executed
36 since 2017
DOB Active ECB Violations
16
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
109registered as of 2023 · self-reported
Portfolio Size
5 buildings · 110 units
HPD Violations / Unit
8.180 (ranking metric)
Open HPD Violations
499
311 Complaints
123
Rodent Inspection Failures
2 since 2017
Evictions Executed
5 since 2017
DOB Active ECB Violations
8
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
60registered as of 2023 · self-reported
Portfolio Size
3 buildings · 61 units
HPD Violations / Unit
7.660 (ranking metric)
Open HPD Violations
812
311 Complaints
890
Rodent Inspection Failures
64 since 2017
Evictions Executed
13 since 2017
DOB Active ECB Violations
37
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
Portfolio Size
3 buildings · 106 units
HPD Violations / Unit
6.961 (ranking metric)
Open HPD Violations
529
311 Complaints
288
Rodent Inspection Failures
20 since 2017
Evictions Executed
1 since 2017
DOB Active ECB Violations
12
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
74registered as of 2023 · self-reported
Portfolio Size
2 buildings · 76 units
All registered names: DAVID ESHAGHOFF · LEMIAO CAI · PARVIZ YOUSEFZADEH · SAMUEL ESHAGHOFF · VAGAN SADOIAN
HPD Violations / Unit
6.938 (ranking metric)
Open HPD Violations
451
311 Complaints
274
Rodent Inspection Failures
37 since 2017
Evictions Executed
3 since 2017
DOB Active ECB Violations
15
DOB Major Permits
22 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
24registered as of 2023 · self-reported
Portfolio Size
13 buildings · 65 units
HPD Violations / Unit
6.477 (ranking metric)
Open HPD Violations
570
311 Complaints
807
Rodent Inspection Failures
42 since 2017
Evictions Executed
5 since 2017
DOB Active ECB Violations
10
DOB Major Permits
2 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
89registered as of 2023 · self-reported
Portfolio Size
5 buildings · 88 units
All registered names: MARTIN ZOLTOWSKI · YAHJA RAJI · YAHYA RAJI
HPD Violations / Unit
6.384 (ranking metric)
Open HPD Violations
715
311 Complaints
736
Rodent Inspection Failures
18 since 2017
Evictions Executed
2 since 2017
DOB Active ECB Violations
20
DOB Major Permits
9 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
64registered as of 2023 · self-reported
Portfolio Size
11 buildings · 112 units
All registered names: MAUREEN ASSOUMOU · MAUREEN WILLIAMS · NGORAN ASSOUMOU · SCHELTON ASSOUMOU · STEPHANE ASSOUMOU
HPD Violations / Unit
6.216 (ranking metric)
Open HPD Violations
317
311 Complaints
221
Rodent Inspection Failures
101 since 2017
Evictions Executed
6 since 2017
DOB Active ECB Violations
75
DOB Major Permits
7 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
Portfolio Size
18 buildings · 51 units
All registered names: BEN FULLERGOOGINS · CYNTHIA GONZALEZ
HPD Violations / Unit
6.089 (ranking metric)
Open HPD Violations
1,023
311 Complaints
1,078
Rodent Inspection Failures
38 since 2017
Evictions Executed
8 since 2017
DOB Active ECB Violations
21
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
131registered as of 2023 · self-reported
Portfolio Size
18 buildings · 168 units
HPD Violations / Unit
5.790 (ranking metric)
Open HPD Violations
718
311 Complaints
544
Rodent Inspection Failures
110 since 2017
Evictions Executed
8 since 2017
DOB Active ECB Violations
60
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
94registered as of 2023 · self-reported
Portfolio Size
7 buildings · 124 units
HPD Violations / Unit
5.697 (ranking metric)
Open HPD Violations
883
311 Complaints
644
Rodent Inspection Failures
17 since 2017
Evictions Executed
10 since 2017
DOB Active ECB Violations
6
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
156registered as of 2023 · self-reported
Portfolio Size
4 buildings · 155 units
All registered names: DIANA MAKAJ · MARC TROIANO · SANDRO MAKAJ
HPD Violations / Unit
5.393 (ranking metric)
Open HPD Violations
453
311 Complaints
349
Rodent Inspection Failures
106 since 2017
Evictions Executed
9 since 2017
DOB Active ECB Violations
15
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
80registered as of 2023 · self-reported
Portfolio Size
3 buildings · 84 units
All registered names: ABRAHAM KASSIN · DANIEL HILTZIK · GREG DWECK · GREGORY DWECK · MARCUS SWEENEY · RALPH CHERA
HPD Violations / Unit
5.385 (ranking metric)
Open HPD Violations
350
311 Complaints
224
Rodent Inspection Failures
25 since 2017
Evictions Executed
3 since 2017
DOB Active ECB Violations
11
DOB Major Permits
12 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
9registered as of 2023 · self-reported
Portfolio Size
8 buildings · 65 units
All registered names: ABE CALLER · BARRY SINGER · JAY AVIGDOR · STEVEN HURWITZ
HPD Violations / Unit
5.330 (ranking metric)
Open HPD Violations
2,601
311 Complaints
2,669
Rodent Inspection Failures
356 since 2017
Evictions Executed
69 since 2017
DOB Active ECB Violations
84
DOB Major Permits
17 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
439registered as of 2023 · self-reported
Portfolio Size
18 buildings · 488 units
HPD Violations / Unit
5.170 (ranking metric)
Open HPD Violations
1,887
311 Complaints
1,984
Rodent Inspection Failures
333 since 2017
Evictions Executed
43 since 2017
DOB Active ECB Violations
13
DOB Major Permits
52 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
318registered as of 2023 · self-reported
Portfolio Size
36 buildings · 365 units
HPD Violations / Unit
5.160 (ranking metric)
Open HPD Violations
645
311 Complaints
1,470
Rodent Inspection Failures
100 since 2017
Evictions Executed
10 since 2017
DOB Active ECB Violations
84
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
99registered as of 2023 · self-reported
Portfolio Size
3 buildings · 125 units
HPD Violations / Unit
5.150 (ranking metric)
Open HPD Violations
1,200
311 Complaints
1,251
Rodent Inspection Failures
200 since 2017
Evictions Executed
59 since 2017
DOB Active ECB Violations
9
DOB Major Permits
23 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
210registered as of 2023 · self-reported
Portfolio Size
20 buildings · 233 units
HPD Violations / Unit
4.963 (ranking metric)
Open HPD Violations
799
311 Complaints
739
Rodent Inspection Failures
100 since 2017
Evictions Executed
17 since 2017
DOB Active ECB Violations
6
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
Portfolio Size
3 buildings · 161 units
All registered names: DEAN HOROWITZ · HARRY HOROWITZ
HPD Violations / Unit
4.901 (ranking metric)
Open HPD Violations
941
311 Complaints
1,089
Rodent Inspection Failures
65 since 2017
Evictions Executed
1 since 2017
DOB Active ECB Violations
18
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
65registered as of 2023 · self-reported
Portfolio Size
11 buildings · 192 units
HPD Violations / Unit
4.868 (ranking metric)
Open HPD Violations
331
311 Complaints
263
Rodent Inspection Failures
21 since 2017
Evictions Executed
4 since 2017
DOB Active ECB Violations
11
DOB Major Permits
2 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
Portfolio Size
3 buildings · 68 units
HPD Violations / Unit
4.810 (ranking metric)
Open HPD Violations
404
311 Complaints
322
Rodent Inspection Failures
24 since 2017
Evictions Executed
11 since 2017
DOB Active ECB Violations
7
DOB Major Permits
5 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
54registered as of 2023 · self-reported
Portfolio Size
3 buildings · 84 units
All registered names: LANISE TAYLOR · MICHAEL KHODADADIAN
HPD Violations / Unit
4.531 (ranking metric)
Open HPD Violations
290
311 Complaints
229
Rodent Inspection Failures
38 since 2017
Evictions Executed
14 since 2017
DOB Active ECB Violations
17
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
39registered as of 2023 · self-reported
Portfolio Size
8 buildings · 64 units
HPD Violations / Unit
4.281 (ranking metric)
Open HPD Violations
244
311 Complaints
592
Rodent Inspection Failures
111 since 2017
Evictions Executed
11 since 2017
DOB Active ECB Violations
0
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
Portfolio Size
4 buildings · 57 units
⚑ This portfolio's registered business address is also used by other unrelated landlords. See the methodology note on shared business addresses.
All registered names: EDOH AFASSOUNDJI · JACQUIN ORTIZ · JOSE PEREZ · WILSON TRONCOSO
HPD Violations / Unit
4.230 (ranking metric)
Open HPD Violations
258
311 Complaints
176
Rodent Inspection Failures
41 since 2017
Evictions Executed
4 since 2017
DOB Active ECB Violations
13
DOB Major Permits
4 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
Portfolio Size
5 buildings · 61 units
All registered names: BARBARA MOORE · DARRELL CANNADAY · DARRELL CANNADDAY
HPD Violations / Unit
4.220 (ranking metric)
Open HPD Violations
249
311 Complaints
210
Rodent Inspection Failures
30 since 2017
Evictions Executed
7 since 2017
DOB Active ECB Violations
12
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
29registered as of 2023 · self-reported
Portfolio Size
3 buildings · 59 units
HPD Violations / Unit
4.216 (ranking metric)
Open HPD Violations
624
311 Complaints
731
Rodent Inspection Failures
115 since 2017
Evictions Executed
15 since 2017
DOB Active ECB Violations
62
DOB Major Permits
15 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
123registered as of 2023 · self-reported
Portfolio Size
12 buildings · 148 units
All registered names: GREGOERY ANDERSON · GREGORY ANDERSON
HPD Violations / Unit
4.107 (ranking metric)
Open HPD Violations
1,109
311 Complaints
2,069
Rodent Inspection Failures
191 since 2017
Evictions Executed
18 since 2017
DOB Active ECB Violations
6
DOB Major Permits
15 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
207registered as of 2023 · self-reported
Portfolio Size
16 buildings · 270 units
All registered names: CHAIM YAGUDAEV · DONALD CLAYTON · EKTA KOTHARI · SHALIBHADRA KOTHARI
HPD Violations / Unit
4.037 (ranking metric)
Open HPD Violations
218
311 Complaints
260
Rodent Inspection Failures
100 since 2017
Evictions Executed
4 since 2017
DOB Active ECB Violations
21
DOB Major Permits
9 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
21registered as of 2023 · self-reported
Portfolio Size
18 buildings · 54 units
HPD Violations / Unit
4.000 (ranking metric)
Open HPD Violations
284
311 Complaints
606
Rodent Inspection Failures
44 since 2017
Evictions Executed
14 since 2017
DOB Active ECB Violations
1
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
44registered as of 2023 · self-reported
Portfolio Size
5 buildings · 71 units
⚑ This portfolio's registered business address is also used by other unrelated landlords. See the methodology note on shared business addresses.
All registered names: ALAN WAINTRAUB · DAVID WEINBERGER · GARY NEUSTADT · GARY NUESTADT · GETZEL NEUSTADT · GETZY NEUSTADT · GITEL MANN · GITTEL MANN · GITTLE MANN · ISSAC HERSKOVITZ · JACK BLATTER · JACK MANN · JAKOB BLATTER · MAYER HANDLER · MORDECHAI LEBOVITS · MORDECHAI NEUSTADT · MOSHE BLOOME · NACHMEN NEUHAUS · RIVKA HOROWITZ · SHMIEL PASKES · SHULEM BERGER · SOLOMON LANDAU · SOLOMON LAUNDAU · YAAKOV BLATTER · YAKKOV BLATTER · YOCHANAN MANN · ZALMEN HOROWITZ
HPD Violations / Unit
3.851 (ranking metric)
Open HPD Violations
1,371
311 Complaints
1,542
Rodent Inspection Failures
333 since 2017
Evictions Executed
42 since 2017
DOB Active ECB Violations
101
DOB Major Permits
41 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
128registered as of 2023 · self-reported
Portfolio Size
54 buildings · 356 units
HPD Violations / Unit
3.833 (ranking metric)
Open HPD Violations
276
311 Complaints
480
Rodent Inspection Failures
107 since 2017
Evictions Executed
17 since 2017
DOB Active ECB Violations
30
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
36registered as of 2023 · self-reported
Portfolio Size
2 buildings · 72 units
HPD Violations / Unit
3.769 (ranking metric)
Open HPD Violations
196
311 Complaints
331
Rodent Inspection Failures
32 since 2017
Evictions Executed
1 since 2017
DOB Active ECB Violations
26
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
43registered as of 2023 · self-reported
Portfolio Size
2 buildings · 52 units
HPD Violations / Unit
3.697 (ranking metric)
Open HPD Violations
244
311 Complaints
227
Rodent Inspection Failures
42 since 2017
Evictions Executed
0 since 2017
DOB Active ECB Violations
5
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
38registered as of 2023 · self-reported
Portfolio Size
3 buildings · 66 units
All registered names: LUKE LAJQI · UKI LAJQI
HPD Violations / Unit
3.667 (ranking metric)
Open HPD Violations
198
311 Complaints
290
Rodent Inspection Failures
45 since 2017
Evictions Executed
4 since 2017
DOB Active ECB Violations
22
DOB Major Permits
1 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
47registered as of 2023 · self-reported
Portfolio Size
3 buildings · 54 units
All registered names: FARRUKH SYED · MAHEEN FARRUKH
HPD Violations / Unit
3.650 (ranking metric)
Open HPD Violations
292
311 Complaints
317
Rodent Inspection Failures
13 since 2017
Evictions Executed
2 since 2017
DOB Active ECB Violations
2
DOB Major Permits
13 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
48registered as of 2023 · self-reported
Portfolio Size
7 buildings · 80 units
HPD Violations / Unit
3.545 (ranking metric)
Open HPD Violations
273
311 Complaints
558
Rodent Inspection Failures
20 since 2017
Evictions Executed
13 since 2017
DOB Active ECB Violations
2
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
69registered as of 2023 · self-reported
Portfolio Size
2 buildings · 77 units
All registered names: LAZER DERBARMDIGER · Y BORNSTEIN · YISROEL BORNSTEIN · YITZCHOK BLUM
HPD Violations / Unit
3.524 (ranking metric)
Open HPD Violations
370
311 Complaints
296
Rodent Inspection Failures
137 since 2017
Evictions Executed
11 since 2017
DOB Active ECB Violations
9
DOB Major Permits
6 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
38registered as of 2023 · self-reported
Portfolio Size
13 buildings · 105 units
HPD Violations / Unit
3.462 (ranking metric)
Open HPD Violations
270
311 Complaints
336
Rodent Inspection Failures
88 since 2017
Evictions Executed
9 since 2017
DOB Active ECB Violations
10
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
79registered as of 2023 · self-reported
Portfolio Size
4 buildings · 78 units
HPD Violations / Unit
3.461 (ranking metric)
Open HPD Violations
443
311 Complaints
504
Rodent Inspection Failures
106 since 2017
Evictions Executed
14 since 2017
DOB Active ECB Violations
22
DOB Major Permits
1 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
99registered as of 2023 · self-reported
Portfolio Size
9 buildings · 128 units
HPD Violations / Unit
3.415 (ranking metric)
Open HPD Violations
222
311 Complaints
272
Rodent Inspection Failures
3 since 2017
Evictions Executed
2 since 2017
DOB Active ECB Violations
4
DOB Major Permits
1 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
56registered as of 2023 · self-reported
Portfolio Size
4 buildings · 65 units
HPD Violations / Unit
3.403 (ranking metric)
Open HPD Violations
211
311 Complaints
159
Rodent Inspection Failures
25 since 2017
Evictions Executed
3 since 2017
DOB Active ECB Violations
13
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
57registered as of 2023 · self-reported
Portfolio Size
4 buildings · 62 units
All registered names: RUBIN DUKLER · SARA DUKLER
HPD Violations / Unit
3.358 (ranking metric)
Open HPD Violations
497
311 Complaints
709
Rodent Inspection Failures
95 since 2017
Evictions Executed
14 since 2017
DOB Active ECB Violations
12
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
85registered as of 2023 · self-reported
Portfolio Size
5 buildings · 148 units
All registered names: FRANCESCO BATTAGLIA · FRANK BATTAGLIA
HPD Violations / Unit
3.182 (ranking metric)
Open HPD Violations
420
311 Complaints
643
Rodent Inspection Failures
48 since 2017
Evictions Executed
17 since 2017
DOB Active ECB Violations
18
DOB Major Permits
14 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
133registered as of 2023 · self-reported
Portfolio Size
9 buildings · 132 units
All registered names: DAVID DEUTSCH · LISA DEUTSCH
HPD Violations / Unit
3.180 (ranking metric)
Open HPD Violations
159
311 Complaints
242
Rodent Inspection Failures
10 since 2017
Evictions Executed
11 since 2017
DOB Active ECB Violations
19
DOB Major Permits
0 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
54registered as of 2023 · self-reported
Portfolio Size
2 buildings · 50 units
All registered names: ALISHA ISLAM · KHADIZA KHANAM · LOUIS RODRIGUEZ · MANIRUL HAQ · MOHAMMED ISLAM · SHABU AHMED · SHAHMINA AKTHER · SHAZAD SHEIKH
HPD Violations / Unit
3.154 (ranking metric)
Open HPD Violations
164
311 Complaints
199
Rodent Inspection Failures
76 since 2017
Evictions Executed
17 since 2017
DOB Active ECB Violations
49
DOB Major Permits
6 A1 / NB / DM — context, not a red flag
Rent-Stabilized Units (2023)
Portfolio Size
18 buildings · 52 units

Methodology

Portfolios are assembled algorithmically from HPD Multiple Dwelling Registration data. Two landlords are grouped into the same portfolio if they share a registered business address (Branch A) or share a name with a similar address in the same zip code (Branch B, trigram similarity > 0.9). Portfolio grouping replicates the approach used by JustFix Who Owns What.

Data current as of June 21, 2026. This page reflects a point-in-time analysis; portfolios change as buildings are sold and registrations are updated.