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840 Jefferson Avenue

BrooklynBIN 3045949
HPD registration valid
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OverviewHealth scoreTimelineFinesOwner
Open Class C
0
Immediately hazardous
Open Class B
23
Hazardous
Open Class A
0
Non-hazardous
Fines due
$0.00
Balance on OATH/ECB summonses
Permits on file
3
DOB permit records
Last activity
Nov 14, 2025
Bedbugs record

Building health score

A composite of public indicators. Every input is a public record. See the full methodology.

B
Health score · Jul 29, 2026
Scored from all 55 public records for this building
Open Class C violations
Immediately hazardous, uncertified
This building 0
Open Class B violations
Hazardous
This building 23
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 No

Unified timeline

Every record from every agency, interleaved. 55 records on file.

Download this timeline (CSV) →
Jan 15, 2026
Nov 14, 2025
Dec 11, 2024
Sep 23, 2024
Dec 6, 2023
Jun 30, 2023
Jun 30, 2023
Jun 20, 2023
Jun 20, 2023
Apr 25, 2023
Dec 5, 2022
Dec 16, 2021
Feb 16, 2021
Dec 25, 2019
Nov 8, 2019
Jan 15, 2019
Apr 6, 2018
Feb 24, 2017
Jul 5, 2016
Oct 8, 2015
Oct 1, 2015
Mar 3, 2015
May 9, 2014
May 9, 2014
Oct 15, 2013
Oct 15, 2013
Mar 1, 2013
Jan 4, 2013
Sep 14, 2012
Dec 13, 2011

OATH / ECB summonses & fines

No balance is recorded as due across the 2 summonses below, out of $1,800.00 in penalties imposed. The city’s published records do not show whether a penalty was paid, reduced, or written off.

OATH and ECB summonses for 840 Jefferson Avenue
179979Sep 13, 2004FAILURE TO MAINTAIN EXTERIOR BUILDING WALL. NOTED: SEPARATION AT NORTHFeb 9, 2005IN VIOLATION—
142035Oct 14, 1992FAILURE TO MAINTAIN EXTERIOR BUILDING WALL. DEFECT IS CHIMNEY AT ROOF Nov 30, 1992WRITTEN OFF—