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423 Throop Avenue, Brooklyn

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423 Throop Avenue at a glance

423 Throop Avenue, Brooklyn has 209 open city records on file, 45 of them Class C (immediately hazardous), and no balance recorded as due on OATH/ECB summonses. The most recent record is dated Nov 14, 2025.

Open Class C
45
Immediately hazardous — click to see them
Open Class B
145
Hazardous — click to see them
Open Class A
19
Non-hazardous — click to see them
Fines due
$0.00
Balance on OATH/ECB summonses
Permits on file
6
Construction permits filed with DOB
Last activity
Nov 14, 2025
HPD record

Health score for 423 Throop Avenue

A composite of the public indicators below. How it is scored.

D
Health score · Aug 5, 2026
Scored from the 300 most recent of 361 public records for this building
Open Class C violations
Immediately hazardous, uncertified
This building 45
Open Class B violations
Hazardous
This building 145
Heat & hot water records
Violations and complaints, last 24 months
This building 0
Unpaid penalties
OATH/ECB summonses with balance due
This building $0
Bedbug filings with infestations
Annual LL69 filings on record
This building 0
Tenant litigation
Open HP actions in Housing Court
This building 0
Active vacate order
HPD or FDNY order to vacate, still in effect
This building Yes

Record timeline for 423 Throop Avenue

Showing the 300 most recent of 361 records; the CSV has the full history. Class A, B and C are HPD’s hazard tiers: C is immediately hazardous, A and B explained here.

Download this timeline (CSV) →

OATH / ECB summonses & fines at 423 Throop Avenue

No balance is recorded as due across the 10 summonses below, out of $65,625.00 in penalties imposed. Balances are as the city publishes them; a settlement or write-off that never reached the dataset will not show here. New to these? How an OATH summons becomes a penalty, explained.

OATH and ECB summonses for 423 Throop Avenue
1318155Mar 22, 2021HOLES IN WALLS AND CEILING AS PER BC 509.1,509.4.1 NO MANUAL RESET LWCJul 28, 2021Defaulted (did not respond)
1403649Apr 11, 2017B265 AS PER CLASS 2 (B265) 28-303.7 FAILURE TO FILE A COMPLETE BOILERJun 5, 2017Written off
1286073Feb 26, 2010FAILURE TO MAINTAIN BUILDING IN CODE-COMPLAINT MANNER. NOTED: 3 STORIEApr 19, 2010Written off
1322772Dec 9, 2009OCCUPANCY CONTRARY TO THAT ALLOWED BY COFO & DOB RECODS.BLDG CONVERTEDSep 22, 2010Written off
1146442May 8, 2009FAILURE TO MAINTAIN BUILDING WALLS,OR APPURTENANCES. NOTED: OBSERVED CMar 15, 2010Written off
1146466May 8, 2009SEC. 28-201.1 FAILURE TO COMPLY WITH COMM-ORDER TO OBTAIN A PERMIT PERMar 15, 2010Written off
1196415Oct 14, 2008FAILURE TO MAINTAIN BLDG IN CODE COMPLIANT MANNER USE OF PROHIBTED DOODec 21, 2009Written off
1196505Oct 10, 2008WORK W/O A PERMIT WORK NOTED: FULL HEIGHT PARTITIONS ERECTED SUBDIVIDIDec 21, 2009Written off
1196416Oct 10, 2008OCCUPANCY CONTRARY TO THAT ALLOWED BY THE C OF O 84015 ISSUED 9/16/193Dec 21, 2009Written off
1325135Oct 9, 2008OCCUPANCY CONTRARY TO THAT ALLOWED BY C OF O AND DOB RECORDS. 3 STORY Mar 7, 2011Written off