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521 MONTGOMERY STREET

Brooklyn · ZIP 11225 · BIN 3034250 · Crown Heights (South) · On record since May 6, 2006 · Built 1925

NeighborhoodⓘCrown Heights (South)
Among the most complained-about buildings in Crown Heights (South)
More complaints than 100% of residential buildings in Crown Heights (South) over the last 10 years. Size-normalized by building volume.
100th pct
Activity TrendsLast 5 years
Complaints have increased in the last 2 years
↑ Rising — no prior history
20100'24'26
Complaint SeverityⓘLast 10 years
Among the highest rates of serious complaints nearby
38 Priority A and B complaints over 20 years — 3.4 per year on average. Size-normalized by building volume.
3.4/yr99th pct(med. 0.1/yr)fewermedianmost
Department of Buildings Complaints
Total complaints since 2006
39
0 active
Total Priority Aⓘ
21
Total Priority Bⓘ
17
No Access for Inspection (past 5 yrs)ⓘ
0%
0 complaints
Complaints over time
5 yrsAll time

First filed May 6, 2006. Latest: May 15, 2026.

Top complaint types
5 yrsAll time
A — ImminentB — SeriousC — StandardD — Minor
Complaint log
39total
Active onlyAll
DateComplaint typePriorityStatusClosedOutcome
May 15, 2026

Crane: No Permit/License/Cert/Unsafe/Illegal

67

ACLOSEDMay 15, 2026
See something wrong? File a complaint with 311

No violation warranted for complaint at time of inspection

Mar 22, 2026

After Hours Work – Illegal

04

BCLOSEDApr 3, 2026

No violation warranted for complaint at time of inspection

Mar 22, 2026

Work Without a Permit – Occupied Multiple Dwelling

7J

BCLOSEDMar 23, 2026

No violation warranted for complaint at time of inspection

Feb 5, 2026

Debris – Excessive

09

BCLOSEDMar 23, 2026

No violation warranted for complaint at time of inspection

Feb 4, 2026

Work Without a Permit – Occupied Multiple Dwelling

7J

BCLOSEDFeb 5, 2026

Ecb violation served

Jan 30, 2026

Work Without a Permit – Occupied Multiple Dwelling

7J

BCLOSEDJan 30, 2026

No violation warranted for complaint at time of inspection

Jan 27, 2026

Site Conditions Endangering Workers

91

ACLOSEDJan 28, 2026

No violation warranted for complaint at time of inspection

Jan 22, 2026

Work Without a Permit – Occupied Multiple Dwelling

7J

BCLOSEDJan 22, 2026

No violation warranted for complaint at time of inspection

Jan 21, 2026

Permit – None (Building/PA/Demo etc.)

05

BCLOSEDJan 21, 2026

Please see complaint number

Jan 14, 2026

Site Conditions Endangering Workers

91

ACLOSEDJan 16, 2026

No violation warranted for complaint at time of inspection

Jan 9, 2026

Site Conditions Endangering Workers

91

ACLOSEDJan 12, 2026

Ecb violation served

Jan 9, 2026

Work Without a Permit – Occupied Multiple Dwelling

7J

BCLOSEDJan 9, 2026

No violation warranted for complaint at time of inspection

Jan 6, 2026

Work Without a Permit – Occupied Multiple Dwelling

7J

BCLOSEDJan 6, 2026

No violation warranted for complaint at time of inspection

Jan 6, 2026

Debris – Excessive

09

BCLOSEDMar 6, 2026

No violation warranted for complaint at time of inspection

Jan 5, 2026

Work Without a Permit – Occupied Multiple Dwelling

7J

BCLOSEDJan 5, 2026

No violation warranted for complaint at time of inspection

Dec 24, 2025

Work Without a Permit – Occupied Multiple Dwelling

7J

BCLOSEDDec 26, 2025

No violation warranted for complaint at time of inspection

Nov 28, 2025

Construction: Contrary/Beyond Approved Plans/Permits

83

BCLOSEDJan 21, 2026

No violation warranted for complaint at time of inspection

Nov 13, 2025

Site Conditions Endangering Workers

91

ACLOSEDNov 13, 2025

No violation warranted for complaint at time of inspection

Nov 6, 2025

Site Conditions Endangering Workers

91

ACLOSEDNov 7, 2025

No violation warranted for complaint at time of inspection

Sep 18, 2025

Sidewalk Shed/Supported Scaffold – Inadequate/Defective/None/No Permit

23

BCLOSEDSep 18, 2025

No violation warranted for complaint at time of inspection

Sep 17, 2025

Suspended (Hanging) Scaffolds – No Permit/License/Dangerous/Accident

1E

ACLOSEDSep 18, 2025

Partial stop work order p

Sep 17, 2025

Site Conditions Endangering Workers

91

ACLOSEDSep 17, 2025

No violation warranted for complaint at time of inspection

Sep 12, 2025

Site Conditions Endangering Workers

91

ACLOSEDSep 13, 2025

No violation warranted for complaint at time of inspection

Aug 27, 2025

Demolition – Unsafe/Illegal/Mechanical Demo

12

ACLOSEDAug 28, 2025

No violation warranted for complaint at time of inspection

Aug 19, 2025

Demolition – Unsafe/Illegal/Mechanical Demo

12

ACLOSEDAug 20, 2025

No violation warranted for complaint at time of inspection

Aug 19, 2025

Site Conditions Endangering Workers

91

ACLOSEDAug 19, 2025

No violation warranted for complaint at time of inspection

Aug 8, 2025

Site Conditions Endangering Workers

91

ACLOSEDAug 9, 2025

No violation warranted for complaint at time of inspection

Aug 8, 2025

Demolition – Unsafe/Illegal/Mechanical Demo

12

ACLOSEDAug 11, 2025

No violation warranted for complaint at time of inspection

Aug 5, 2025

Site Conditions Endangering Workers

91

ACLOSEDAug 5, 2025

No violation warranted for complaint at time of inspection

Aug 4, 2025

Site Conditions Endangering Workers

91

ACLOSEDAug 4, 2025

Ecb violation served

Jul 31, 2025

Site Conditions Endangering Workers

91

ACLOSEDJul 31, 2025

No violation warranted for complaint at time of inspection

Jul 28, 2025

Site Conditions Endangering Workers

91

ACLOSEDJul 29, 2025

No violation warranted for complaint at time of inspection

Sep 17, 2024

Building Shaking/Vibrating/Structural Stability Affected

30

ACLOSEDSep 19, 2024

No violation warranted for complaint at time of inspection

Aug 6, 2024

Construction: Contrary/Beyond Approved Plans/Permits

83

BCLOSEDSep 27, 2024

Ecb violation served

Jan 21, 2011

Permit – None (Building/PA/Demo etc.)

05

BCLOSEDFeb 12, 2011

Inspector unable to gain access - 2nd attempt

Jul 23, 2007

Work Contrary to Stop Work Order

86

ACLOSEDJul 23, 2007

Complaint unsubstantiated based on department records

Mar 22, 2007

Excavation – Undermining Adjacent Building

14

ACLOSEDJul 12, 2007

Stop work order fully rescinded n

Mar 22, 2007

Plumbing: Defective/Leaking/Not Maintained

94

CCLOSEDMar 23, 2007

Ecb & buildings violations served

May 6, 2006

Permit – None (Building/PA/Demo etc.)

05

BCLOSEDMay 17, 2006

Ecb & buildings violations served