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Walk-up apt, over six families with stores
4623 6 AVENUE
BROOKLYN · BIN 3011953
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1928Year Built
4Stories
C7Building Class
R6AZoning
7,959 sfGross Floor Area
11Units
Rent Stabilized279 Open Violations ▸FDNY Report ↗
Walk-up apt, over six families with stores · Owner of record: X.D. YANG & DAUGHTER, LLC · 2,500 sf lot · 3.18 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralElectricalMechanicalPlumbingFire ProtectionEquipmentCivilGeneralOther
Roof89p · 2 filings · 7 docs
Bulkhead12p · 1 filing · 3 docs
Penthouse3p · 1 filing · 3 docs
Floor 811p · 1 filing · 3 docs
Floor 80
Floor 79
Floor 78
Floor 77
Floor 76
Floor 75
Floor 74
Floor 73
Floor 72
Floor 71
Floor 70
Floor 69
Floor 681p · 1 filing · 3 docs
Floor 671p · 1 filing · 3 docs
Floor 661p · 1 filing · 3 docs
Floor 651p · 1 filing · 3 docs
Floor 641p · 1 filing · 3 docs
Floor 631p · 1 filing · 3 docs
Floor 621p · 1 filing · 3 docs
Floor 611p · 1 filing · 3 docs
Floor 601p · 1 filing · 3 docs
Floor 591p · 1 filing · 3 docs
Floor 581p · 1 filing · 3 docs
Floor 571p · 1 filing · 3 docs
Floor 561p · 1 filing · 3 docs
Floor 551p · 1 filing · 3 docs
Floor 541p · 1 filing · 3 docs
Floor 531p · 1 filing · 3 docs
Floor 521p · 1 filing · 3 docs
Floor 511p · 1 filing · 3 docs
Floor 501p · 1 filing · 3 docs
Floor 491p · 1 filing · 3 docs
Floor 483p · 1 filing · 3 docs
Floor 471p · 1 filing · 3 docs
Floor 461p · 1 filing · 3 docs
Floor 451p · 1 filing · 3 docs
Floor 441p · 1 filing · 3 docs
Floor 431p · 1 filing · 3 docs
Floor 421p · 1 filing · 3 docs
Floor 411p · 1 filing · 3 docs
Floor 401p · 1 filing · 3 docs
Floor 393p · 1 filing · 3 docs
Floor 381p · 1 filing · 3 docs
Floor 373p · 1 filing · 3 docs
Floor 364p · 1 filing · 3 docs
Floor 351p · 1 filing · 3 docs
Floor 341p · 1 filing · 3 docs
Floor 331p · 1 filing · 3 docs
Floor 321p · 1 filing · 3 docs
Floor 311p · 1 filing · 3 docs
Floor 302p · 1 filing · 3 docs
Floor 293p · 1 filing · 3 docs
Floor 283p · 1 filing · 3 docs
Floor 273p · 1 filing · 3 docs
Floor 264p · 1 filing · 3 docs
Floor 254p · 1 filing · 3 docs
Floor 244p · 1 filing · 3 docs
Floor 235p · 1 filing · 3 docs
Floor 223p · 1 filing · 3 docs
Floor 213p · 1 filing · 3 docs
Floor 203p · 1 filing · 3 docs
Floor 194p · 1 filing · 3 docs
Floor 185p · 1 filing · 3 docs
Floor 174p · 1 filing · 3 docs
Floor 164p · 1 filing · 3 docs
Floor 155p · 1 filing · 3 docs
Floor 144p · 1 filing · 3 docs
Floor 134p · 1 filing · 3 docs
Floor 125p · 1 filing · 3 docs
Floor 113p · 1 filing · 3 docs
Floor 104p · 1 filing · 3 docs
Floor 95p · 1 filing · 3 docs
Floor 811p · 1 filing · 3 docs
Floor 712p · 1 filing · 3 docs
Floor 618p · 1 filing · 3 docs
Floor 518p · 1 filing · 3 docs
Floor 418p · 1 filing · 3 docs
Floor 336p · 1 filing · 3 docs
Floor 259p · 1 filing · 3 docs
Floor 157p · 1 filing · 3 docs
Mezzanine6p · 1 filing · 3 docs
Cellar106p · 1 filing · 3 docs
Sub-Cellar4p · 1 filing · 3 docs
Basement25p · 2 filings · 7 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
T-MOBILE307/08/2026
WEI HORSE CONSTRUCTION303/22/2026
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
01/14/2015$2.3M—MAR-SHAM, INC. → X.D. YANG & DAUGHTER, LLC$285/sf building
02/11/2014$1.9M—— → —$239/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
KMB DESIGN GROUP, LLC303/20/2026
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
CONSTRUCTION PERMIT SERVICES203/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
TELCOM ENGINEERING GP INCGeneral Contractor203/21/2026
BARRY KAPLOWITZElectrical103/21/2026
KAPLOWITZ BARRYElectrical103/21/2026
TRISTRUX LLCGeneral Contractor107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
KMB DESIGN GROUP, LLC513303/20/2026
Building Lifecycle
All (77)Filed (3)Permit Issued (2)Signed Off (2)Violation (60)Objection (10)
04/30/2026
Violation issued (HPD, open)
A
04/09/2026
Objection resolved — Addressed
04/09/2026
Objection resolved — Addressed
03/31/2026
Objection raised — Structural
03/31/2026
Objection raised — Admin
03/20/2026
Filed — Alteration
Modification to Verizon site. Relocate 2 GPS antennas. Remove 6 antennas and 6 RRHs. Install 9 antennas and 6 RRHs, install new platform with related dunnage, new ships ladder with railing. Remove cabinet.
B01211420-I1
01/12/2026
Violation issued (HPD, open)
C
01/12/2026
Violation issued (HPD, open)
B
01/12/2026
Violation issued (HPD, open)
C
12/30/2025
Violation issued (HPD, open)
A
12/30/2025
Violation issued (HPD, open)
B
12/30/2025
Violation issued (HPD, open)
C
12/30/2025
Violation issued (HPD, open)
A
12/30/2025
Violation issued (HPD, open)
C
12/30/2025
Violation issued (HPD, open)
A
12/30/2025
Violation issued (HPD, open)
A
12/30/2025
Violation issued (HPD, open)
C
12/30/2025
Violation issued (HPD, open)
A
12/30/2025
Violation issued (HPD, open)
A
12/30/2025
Violation issued (HPD, open)
B
12/30/2025
Violation issued (HPD, open)
A
12/30/2025
Violation issued (HPD, open)
C
12/30/2025
Violation issued (HPD, open)
B
12/30/2025
Violation issued (HPD, open)
A
12/30/2025
Violation issued (HPD, open)
B
12/30/2025
Violation issued (HPD, open)
A
12/30/2025
Violation issued (HPD, open)
A
12/30/2025
Violation issued (HPD, open)
C
12/30/2025
Violation issued (HPD, open)
B
10/17/2025
Violation issued (HPD, open)
A
10/17/2025
Violation issued (HPD, open)
C
10/17/2025
Violation issued (HPD, open)
A
10/17/2025
Violation issued (HPD, open)
A
10/17/2025
Violation issued (HPD, open)
B
10/17/2025
Violation issued (HPD, open)
C
10/17/2025
Violation issued (HPD, open)
A
10/17/2025
Violation issued (HPD, open)
C
10/17/2025
Violation issued (HPD, open)
A
10/17/2025
Violation issued (HPD, open)
A
10/17/2025
Violation issued (HPD, open)
A
10/17/2025
Violation issued (HPD, open)
B
10/17/2025
Violation issued (HPD, open)
A
10/17/2025
Violation issued (HPD, open)
A
10/17/2025
Violation issued (HPD, open)
B
10/17/2025
Violation issued (HPD, open)
A
10/17/2025
Violation issued (HPD, open)
A
06/05/2025
Violation issued (HPD, open)
A
11/16/2024
Violation issued (HPD, closed)
C
11/16/2024
Violation issued (HPD, closed)
C
11/16/2024
Violation issued (HPD, open)
A
07/03/2024
Violation issued (HPD, open)
B
07/03/2024
Violation issued (HPD, open)
C
06/27/2024
Violation issued (HPD, open)
C
04/25/2024
Violation issued (HPD, open)
C
04/25/2024
Violation issued (HPD, open)
B
04/25/2024
Violation issued (HPD, closed)
C
04/25/2024
Violation issued (HPD, open)
B
04/25/2024
Violation issued (HPD, open)
B
04/25/2024
Violation issued (HPD, closed)
C
04/03/2024
Violation issued (HPD, open)
A
Latest 60 of 77 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWAntennaSigned-offTRISTRUX LLC09/22/2022
DOB NOWAntennaSigned-offLINED UP CONSTRUCTION03/14/2018
BISOTISSUEDSPLEN CONSTRUCTION INC07/20/2021
BISPLISSUEDTOP PLUMBING GROUP,INC08/01/2018
BISOTISSUEDHIGH QUALITY CONSTRUCTION08/01/2018
BISMHISSUEDVERTICAL SOLUTIONS INC08/25/2005
BISOTISSUEDVERTICAL SOLUTIONS INC01/11/2005
BISPLISSUEDAVON PLBG & HTG INC04/15/2003
BISOTISSUEDNU-TECH LAUNDRIES INC04/15/2003
BISFBISSUEDBLUE DIAMOND FUEL OIL CORP06/08/1999
1 project · most recent 03/20/2018
FiledStatusContractorScope
03/20/2018CompleteCHARLES M. DWYER ELECTL14 meters, 1 new_meters
Nothing on file for this building.
▾Documents — 32 on file (BIS + DOB NOW)
▸Plans & Drawings3
▸DOB NOWPlans/Sketch3
08/28/2026B00789945-I1Request digital key ↗
08/17/2026B01211420-I1Request digital key ↗
08/15/2026B00000444-I1Request digital key ↗
▸Applications & Permits4
▸BISPLAN / WORK APPROVAL APPLICATION3
09/23/2019321965030Open ↗
07/02/2019321965030Open ↗
08/01/2018321768333Open ↗
▸BISWORK PERMIT APPLICATION1
07/20/2021321965030Open ↗
▸Seals & Professional Certifications6
▸DOB NOWDPL-1: Design Professional Seal & Signature3
09/03/2026B00000444-I1Open ↗
08/17/2026B01211420-I1Open ↗
08/13/2026B00789945-I1Open ↗
▸BISTECHNICAL REPORT: RESPONSIBILITY/CERTIFICATION2
07/02/2019321965030Open ↗
08/01/2018321768333Open ↗
▸BISPROFESSIONAL CERTIFICATION STATEMENT1
08/01/2018321768333Open ↗
▸Trade Schedules & Equipment2
▸BISSCHEDULE B - PLUMBING/SPRINKLER/STANDPIPE2
09/23/2019321965030Open ↗
07/02/2019321965030Open ↗
▸Safety & Tenant Protection2
▸BISTenant Protection Plan and Notes2
09/23/2019321965030Open ↗
08/01/2018321768333Open ↗
▸Environmental & Asbestos6
▸BISASBESTOS: CERTIFICATION (DEP ACP5)3
09/23/2019321965030Open ↗
07/02/2019321965030Open ↗
08/01/2018321768333Open ↗
▸DOB NOWDEP ACP-5: Asbestos Assessment Report3
08/17/2026B01211420-I1Open ↗
08/15/2026B00000444-I1Open ↗
08/13/2026B00789945-I1Open ↗
▸Energy Compliance2
▸BISTECHNICAL REPORT: ENERGY CODE PROGRESS INSPS1
07/02/2019321965030Open ↗
▸BISTECHNICAL REPORT: ENERGY CODE - RESPONSIBILITY1
07/19/2021321965030Open ↗
▸Inspections & Test Reports1
▸BISTECHNICAL REPORT: RESPONSIBILITY1
07/19/2021321965030Open ↗
▸Cost, Insurance & Ownership2
▸BISCOST AFFIDAVIT2
07/02/2019321965030Open ↗
08/01/2018321768333Open ↗
▸Filing & Intake Forms2
▸BISEFILING COVER SHEET2
07/02/2019321965030Open ↗
08/02/2018321768333Open ↗
▸Other Documents2
▸BISHPD: CONH PILOT1
09/23/2019321965030Open ↗
▸DOB NOWHPD4: CONH Pilot Program1
08/13/2026B00789945-I1Open ↗