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Two family frame
2123 WEST 9 STREET
BROOKLYN · Gravesend (East)-Homecrest · BIN 3192403
💬 Discuss this project
1901Year Built
2Stories
B2Building Class
R5Zoning
1,200 sfGross Floor Area
2Units
Two family frame · 2,000 sf lot · 0.6 FAR built · Flood zone X500
Locations of Work
ArchitectureStructuralMechanicalPlumbingLandscapeGeneralOther
Permit Issued — active, not yet Signed-off
Floor 2Under Construction6p · 1 filing · 15 docs
Floor 1Under Construction6p · 1 filing · 15 docs
CellarUnder Construction5p · 1 filing · 15 docs
Site & exteriorUnder Construction5p · 1 filing · 15 docs
Filed — no permit issued29p · 1 filing · 8 docs
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
12/30/2025$728K—— → —$607/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
PRIME ZONE BUILDING CONSULTING108/11/2026
CHUN FENG, ARCHITECT406/16/2026
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
HIGH QUALITY 338403/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
HIGH QUALITY CONSTRUCTIONGeneral Contractor204/09/2026
MERCURY BUILDING ASSOGeneral Contractor207/08/2026
AMERICAN STANDARD P&H CORORP.Plumbing107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
SQ. ARCH, LLC4802406/16/2026
NKM ENGINEERING PLLC6244101/13/2026
Building Lifecycle
All (48)Filed (5)Permit Issued (5)Objection (8)Special Inspection (30)
08/19/2026
Objection raised — Admin
08/19/2026
Objection raised — Zoning
08/19/2026
Objection raised — Zoning
08/19/2026
Objection raised — Zoning
08/19/2026
Objection raised — Admin
08/19/2026
Objection raised — Zoning
08/19/2026
Objection raised — Zoning
08/19/2026
Objection raised — Admin
08/11/2026
Filed — Alteration CO
PROPOSED 3-STORY HORIZONTAL AND VERTICAL ENLARGEMENT AT THE FRONT OF EXISTING TWO-STORY, (2) TWO-FAMILY RESIDENTIAL BLDG. WITH CELLAR. OBTAIN NEW CERTIFICATE OF OCCUPANCY.
B01430555-I1
07/14/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
07/14/2026
Special inspection requirement — Private On-Site Storm Water Disposal Systems-, and Detention Facilities, Installation
07/14/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
07/14/2026
Special inspection requirement — Energy Code Compliance Inspections
07/14/2026
Special inspection requirement — Fire-Resistance Rated Construction
07/14/2026
Special inspection requirement — Insulation placement and R values
07/14/2026
Special inspection requirement — Air barrier - visual inspection
07/14/2026
Special inspection requirement — Fenestration air leakage
07/14/2026
Special inspection requirement — Maintenance information
07/14/2026
Special inspection requirement — Interior lighting power
07/14/2026
Special inspection requirement — Fenestration and door U-factor and product ratings
07/14/2026
Special inspection requirement — Fenestration areas
07/14/2026
Special inspection requirement — Metering
06/17/2026
Special inspection requirement — Energy Code Compliance Inspections
Chun Feng
06/17/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
Chun Feng
06/16/2026
Filed — Alteration
FILE TO PLUMBING AS PER PLAN, CONJUNCTION GC APPLICATION B01344271. NO CHANGE IN USE, EGRESS OR OCCUPANCY.
B01344271-P3
04/21/2026
Filed — Alteration
FILE TO PLUMBING AS PER PLAN, CONJUNCTION GC APPLICATION B01344271. NO CHANGE IN USE, EGRESS OR OCCUPANCY.
B01344271-P1
04/21/2026
Permit issued — General Construction
B01344271-I1-MS
04/21/2026
Permit issued — General Construction
B01344271-I1-GC
03/26/2026
Special inspection requirement — Energy Code Compliance Inspections
Chun Feng
03/26/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
Chun Feng
02/02/2026
Permit issued — Plumbing
B01344271-S1-PL
01/25/2026
Permit issued — Mechanical Systems
B01344271-I1-MS
01/25/2026
Permit issued — Mechanical Systems
B01344271-I1-GC
01/13/2026
Filed — Alteration
FILE TO PLUMBING AS PER PLAN, CONJUNCTION GC APPLICATION B01344271. NO CHANGE IN USE, EGRESS OR OCCUPANCY.
B01344271-I1
01/13/2026
Filed — Alteration
FILE TO PLUMBING AS PER PLAN, CONJUNCTION GC APPLICATION B01344271. NO CHANGE IN USE, EGRESS OR OCCUPANCY.
B01344271-S1
01/13/2026
Special inspection requirement — Energy Code Compliance Inspections
Chun Feng
01/13/2026
Special inspection requirement — HVAC-R and service water heating equipment
Chun Feng
01/13/2026
Special inspection requirement — Air barrier - visual inspection
Chun Feng
01/13/2026
Special inspection requirement — Fenestration and door U-factor and product ratings
Chun Feng
01/13/2026
Special inspection requirement — HVAC-R and service water heating system controls
Chun Feng
01/13/2026
Special inspection requirement — Fenestration air leakage
Chun Feng
01/13/2026
Special inspection requirement — HVAC-R and service water piping design and insulation
Chun Feng
01/13/2026
Special inspection requirement — Fenestration areas
Chun Feng
01/13/2026
Special inspection requirement — Insulation placement and R values
Chun Feng
01/13/2026
Special inspection requirement — Interior lighting power
Chun Feng
01/13/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
Chun Feng
01/13/2026
Special inspection requirement — Fire-Resistance Rated Construction
Chun Feng
01/08/2026
Special inspection requirement — Final
Chun Feng
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWGeneral ConstructionPermit IssuedMERCURY BUILDING ASSO INC04/21/2026
DOB NOWGeneral ConstructionPermit IssuedMERCURY BUILDING ASSO INC04/21/2026
DOB NOWPlumbingPermit IssuedAMERICAN STANDARD P&H CORORP.02/02/2026
DOB NOWMechanical SystemsPermit IssuedHIGH QUALITY CONSTRUCTION01/25/2026
DOB NOWMechanical SystemsPermit IssuedHIGH QUALITY CONSTRUCTION01/25/2026
1 project · most recent 06/16/2026
Air Conditioning Systems
FiledStatusContractorScopeMake / Model / Capacity
06/16/2026Permit IssuedMERCURY BUILDING ASSO INCAir Conditioning Systems
Cooling
Daikin RXT15AVJU9 15,000 BTU · Vrf Outdoor ×4
RXC12AXVJU 12,000 BTU · Condensing Unit ×2
1 project · most recent 06/16/2026
Gas Water/Sanitary
FiledStatusContractorScope
06/16/2026Permit IssuedAMERICAN STANDARD P&H CORGas, Water/Sanitary
1 project · most recent 03/07/2026
General Wiring
FiledStatusContractorScope
03/07/2026Permit IssuedE D ELECTRICAL INCGeneral Wiring
▾Special Inspection Requirements (DOB NOW) — 31
DateRequirementInspectorRole
07/14/2026Fire-Resistant Penetrations and Joints—special
07/14/2026Private On-Site Storm Water Disposal Systems-, and Detention Facilities, Installation—special
07/14/2026Structural Stability – Alterations of existing buildings—special
07/14/2026Energy Code Compliance Inspections—progress
07/14/2026Fire-Resistance Rated Construction—progress
07/14/2026Insulation placement and R values—energy_progress
07/14/2026Air barrier - visual inspection—energy_progress
07/14/2026Fenestration air leakage—energy_progress
07/14/2026Maintenance information—energy_progress
07/14/2026Interior lighting power—energy_progress
07/14/2026Fenestration and door U-factor and product ratings—energy_progress
07/14/2026Fenestration areas—energy_progress
07/14/2026Metering—energy_progress
06/17/2026Energy Code Compliance InspectionsChun Fengprogress
06/17/2026Fire-Resistant Penetrations and JointsChun Fengspecial
03/26/2026Energy Code Compliance InspectionsChun Fengprogress
03/26/2026Fire-Resistant Penetrations and JointsChun Fengspecial
01/13/2026Energy Code Compliance InspectionsChun Fengprogress
01/13/2026HVAC-R and service water heating equipmentChun Fengenergy_progress
01/13/2026Air barrier - visual inspectionChun Fengenergy_progress
01/13/2026Fenestration and door U-factor and product ratingsChun Fengenergy_progress
01/13/2026HVAC-R and service water heating system controlsChun Fengenergy_progress
01/13/2026Fenestration air leakageChun Fengenergy_progress
01/13/2026HVAC-R and service water piping design and insulationChun Fengenergy_progress
01/13/2026Fenestration areasChun Fengenergy_progress
Latest 25 of 31.
▾Documents — 58 on file (BIS + DOB NOW)
▸Plans & Drawings6
▸DOB NOWPlans/Sketch6
08/17/2026B01344271-S1Request digital key ↗
08/17/2026B01344271-I1Request digital key ↗
08/17/2026B01344271-P2Request digital key ↗
Showing 3 of 6 on file for this type
▸Zoning, Tax Lot & Property Records4
▸DOB NOWRestrictive Declaration/Easement 13
08/17/2026B01344271-P1Open ↗
08/17/2026B01344271-P3Open ↗
08/13/2026B01344271-S1Open ↗
▸DOB NOWZD1: DOB Zoning Diagram1
08/16/2026B01430555-I1Open ↗
▸Seals & Professional Certifications38
▸DOB NOWProgress Inspector Seal & Signature26
09/01/2026B01344271-I1Open ↗
09/01/2026B01344271-I1Open ↗
09/01/2026B01344271-I1Open ↗
Showing 3 of 26 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature6
08/17/2026B01344271-S1Open ↗
08/17/2026B01344271-I1Open ↗
08/17/2026B01344271-P1Open ↗
Showing 3 of 6 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature6
09/01/2026B01344271-I1Open ↗
09/01/2026B01344271-I1Open ↗
09/01/2026B01344271-P2Open ↗
Showing 3 of 6 on file for this type
▸Safety & Tenant Protection1
▸DOB NOWStreet Tree Checklist1
08/16/2026B01430555-I1Open ↗
▸Environmental & Asbestos6
▸DOB NOWDEP ACP-5: Asbestos Assessment Report6
08/17/2026B01344271-S1Open ↗
08/17/2026B01344271-I1Open ↗
08/17/2026B01344271-P1Open ↗
Showing 3 of 6 on file for this type
▸Other Documents3
▸DOB NOWProperty Ownership Certification1
08/16/2026B01430555-I1Open ↗
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone1
08/16/2026B01430555-I1Open ↗
▸DOB NOWSite Survey: Initial1
08/16/2026B01430555-I1Open ↗