← Back
Four families
423 WEST 146 STREET
MANHATTAN · Hamilton Heights-Sugar Hill · BIN 1061422
💬 Discuss this project
1900Year Built
3Stories
C3Building Class
R6AZoning
3,000 sfGross Floor Area
4Units
Rent Stabilized27 Open Violations ▸
Four families · 1,432 sf lot · 2.09 FAR built · Flood zone X
Locations of Work
ArchitectureMechanicalPlumbing
Floor 17p · 3 filings · 18 docs
Cellar7p · 2 filings · 10 docs
Basement1p · 1 filing · 5 docs
Sub-Basement7p · 3 filings · 18 docs
Site & exterior2p · 1 filing · 8 docs
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
11/01/2019$1.8M—Private party → Private party$584/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
CONSTANT AND BROWN ENGINEERING DPC302/03/2022
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
AYE CONSULTING GROUP603/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
GNS HOME IMPROVMENT LLCGeneral Contractor407/08/2026
L&J PLG & HTG CO OF NY INPlumbing107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
CONSTANT AND BROWN ENGINE7565302/03/2022
Building Lifecycle
All (75)Filed (3)Permit Issued (3)Violation (33)Objection (32)Special Inspection (4)
04/29/2026
Violation issued (HPD, open)
A
11/17/2025
Violation issued (HPD, open)
I
06/04/2025
Violation issued (HPD, open)
A
11/22/2024
Violation issued (HPD, open)
I
04/02/2024
Violation issued (HPD, open)
A
11/15/2023
Violation issued (HPD, open)
I
03/16/2023
Violation issued (HPD, open)
A
11/02/2022
Violation issued (HPD, open)
I
02/16/2022
Permit issued — Mechanical Systems
M00633444-I1-MS
02/16/2022
Violation issued (HPD, open)
A
02/15/2022
Permit issued — Plumbing
M00662603-I1-PL
02/03/2022
Filed — Alteration
Installation of two (2) separate condensing units at rear yard for mini-split systems for basement (2-ton) and 1st floor (3-ton) of building owner's duplex apartment.
M00633444-I1
01/24/2022
Objection raised — Other
01/24/2022
Objection resolved — Addressed
01/24/2022
Objection raised — Mechanical
01/24/2022
Objection resolved — Addressed
01/24/2022
Objection raised — Mechanical
01/24/2022
Objection resolved — Addressed
01/24/2022
Objection raised — Admin
01/24/2022
Objection resolved — Addressed
01/24/2022
Objection raised — Mechanical
01/24/2022
Objection resolved — Addressed
01/24/2022
Objection raised — Fire_Protection
01/24/2022
Objection resolved — Addressed
01/24/2022
Objection raised — Inspections
01/24/2022
Objection resolved — Addressed
01/24/2022
Objection raised — Scope
01/24/2022
Objection resolved — Addressed
01/24/2022
Objection raised — Inspections
01/24/2022
Objection resolved — Addressed
01/24/2022
Objection raised — Inspections
01/24/2022
Objection resolved — Addressed
01/24/2022
Objection raised — Other
01/24/2022
Objection resolved — Addressed
01/17/2022
Permit issued — General Construction
M00622030-I1-GC
01/14/2022
Filed — Alteration
Replacement & relocation of plumbing fixtures at kitchen, powder room and two (2) bathrooms. Removal of stove and kitchen sink at basement; cap gas & plumbing lines at basement.
M00662603-I1
01/13/2022
Special inspection requirement — Fire-Resistant Penetrations and Joints
VLADIMIR CONSTANT
12/27/2021
Objection raised — Scope
12/27/2021
Objection resolved — Addressed
12/27/2021
Objection raised — Scope
12/27/2021
Objection resolved — Addressed
12/27/2021
Objection raised — Scope
12/27/2021
Objection resolved — Addressed
12/17/2021
Objection raised — Scope
12/17/2021
Objection resolved — Addressed
12/17/2021
Objection raised — Scope
12/17/2021
Objection resolved — Addressed
12/10/2021
Filed — Alteration
Combination of studio apt @ Bsmt with duplex apt @ 1st Fl. ; renovation of powder room & kitchen at 1s fl. Renovation of two (2) bathrooms @ Basement. Minor work at Cellar including replacement of ceiling @ Boiler room with new 1 Hour fire-rated ceiling.
M00622030-I1
11/17/2021
Special inspection requirement — Fire-Resistant Penetrations and Joints
VLADIMIR CONSTANT
11/17/2021
Special inspection requirement — Mechanical Systems
VLADIMIR CONSTANT
11/17/2021
Special inspection requirement — Final
VLADIMIR CONSTANT
04/02/2021
Violation issued (HPD, open)
A
04/02/2021
Violation issued (HPD, closed)
I
11/09/2017
Violation issued (HPD, closed)
I
10/02/2015
Violation issued (HPD, closed)
I
02/03/2015
Violation issued (HPD, open)
B
05/10/2009
Violation issued (HPD, open)
B
05/10/2009
Violation issued (HPD, open)
A
05/10/2009
Violation issued (HPD, open)
B
05/10/2009
Violation issued (HPD, open)
B
Latest 60 of 75 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWMechanical SystemsPermit IssuedGNS HOME IMPROVMENT LLC02/16/2022
DOB NOWPlumbingPermit IssuedL&J PLG & HTG CO OF NY IN02/15/2022
DOB NOWGeneral ConstructionPermit IssuedGNS HOME IMPROVMENT LLC01/17/2022
1 project · most recent 02/03/2022
Air Conditioning Systems
FiledStatusContractorScopeMake / Model / Capacity
02/03/2022Permit IssuedGNS HOME IMPROVMENT LLCAir Conditioning Systems
Cooling
Fujitsu AOU24RLXFZ 24,000 BTU · Heat Pump Outdoor ×1
AOU36RLXFZ1 36,000 BTU · Heat Pump Outdoor ×1
1 project · most recent 01/14/2022
Gas Water/Sanitary
FiledStatusContractorScope
01/14/2022Permit IssuedL&J PLG & HTG CO OF NY INGas, Water/Sanitary
▾Special Inspection Requirements (DOB NOW) — 4
DateRequirementInspectorRole
01/13/2022Fire-Resistant Penetrations and JointsVLADIMIR CONSTANTspecial
11/17/2021Fire-Resistant Penetrations and JointsVLADIMIR CONSTANTspecial
11/17/2021Mechanical SystemsVLADIMIR CONSTANTspecial
11/17/2021FinalVLADIMIR CONSTANTprogress
▾Documents — 18 on file (BIS + DOB NOW)
▸Plans & Drawings3
▸DOB NOWPlans/Sketch3
09/02/2026M00633444-I1Request digital key ↗
08/15/2026M00662603-I1Request digital key ↗
08/15/2026M00622030-I1Request digital key ↗
▸Applications & Permits3
▸DOB NOWLPC Approval/Permit3
08/15/2026M00662603-I1Open ↗
08/13/2026M00633444-I1Open ↗
08/13/2026M00622030-I1Open ↗
▸Seals & Professional Certifications7
▸DOB NOWSpecial Inspector Seal & Signature3
08/31/2026M00662603-I1Open ↗
08/28/2026M00633444-I1Open ↗
08/28/2026M00633444-I1Open ↗
▸DOB NOWDPL-1: Design Professional Seal & Signature3
09/03/2026M00662603-I1Open ↗
08/13/2026M00633444-I1Open ↗
08/13/2026M00622030-I1Open ↗
▸DOB NOWProgress Inspector Seal & Signature1
08/28/2026M00633444-I1Open ↗
▸Safety & Tenant Protection2
▸DOB NOWHPD-3: Single Room Occupancy Multiple Dwelling (SRO MD) Anti-Harassment Checklist2
08/13/2026M00622030-I1Open ↗
08/13/2026M00633444-I1Open ↗
▸Environmental & Asbestos3
▸DOB NOWDEP ACP-5: Asbestos Assessment Report3
08/15/2026M00662603-I1Open ↗
08/13/2026M00622030-I1Open ↗
08/13/2026M00633444-I1Open ↗