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Two family converted from one family
21 DEAN STREET
BROOKLYN · BIN 3002819
💬 Discuss this project
1910Year Built
3Stories
B3Building Class
R6BZoning
4,158 sfGross Floor Area
2Units
0 Open Violations
Two family converted from one family · 2,274 sf lot · 1.83 FAR built · Flood zone X
Locations of Work
ArchitectureMechanicalPlumbing
Permit Issued — active, not yet Signed-off
RoofUnder Construction21p · 1 filing · 20 docs
PenthouseUnder Construction20p · 1 filing · 20 docs
Floor 3Under Construction21p · 2 filings · 20 docs
Floor 2Under Construction20p · 2 filings · 20 docs
Floor 1Under Construction16p · 1 filing · 20 docs
CellarUnder Construction20p · 2 filings · 20 docs
BasementUnder Construction18p · 1 filing · 20 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
SIGNATURE BUILDERS LLC NY203/22/2026
BUILDERS LLC NY SIGNATURE103/22/2026
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
06/23/2022$5.0M—— → —$1,202/sf building
07/23/2014$260K—Private party → Private party$63/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
JUNG H. CHOI, ARCHITECT, PC1103/04/2026
INDETAIL ARCHITECTURAL AND ENGIN109/22/2022
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
SAGACITY BUILDING SERVICES1003/21/2026
HTX BUILDING CONSULTING103/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
NY SIGNATURE BUILDERS LLCGeneral Contractor2307/08/2026
GANIC PLUMBING & HTG INCPlumbing307/08/2026
J'S CUSTOM CONTRACTING INGeneral Contractor203/21/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
SOHAIL HUMAYUN P E INC8457703/04/2026
SD TESTING & INSPECTION S7010307/21/2025
Building Lifecycle
All (103)Filed (12)Permit Issued (15)Signed Off (4)Violation (5)Inspection (7)Objection (30)Special Inspection (30)
08/28/2026
Inspection — Pass-Final General Construction Non-Directive 14
Pass
View inspection ↗
07/13/2026
Signed off — Alteration CO
INSTALLATION OF NEW PLYWOOD CONSTRUCTION FENCE AS PER PLAN. THERE IS NO CHANGE IN USE, OCCUPANCY, OR MEANS OF EGRESS UNDER THIS APPLICATION.
B00821739-S2
03/18/2026
Special inspection requirement — Energy Code Compliance Inspections
SOHAIL HUMAYUN
03/18/2026
Special inspection requirement — Post-installed Anchors
SOHAIL HUMAYUN
03/18/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
SOHAIL HUMAYUN
03/04/2026
Filed — Alteration CO
INSTALLATION OF NEW PLYWOOD CONSTRUCTION FENCE AS PER PLAN. THERE IS NO CHANGE IN USE, OCCUPANCY, OR MEANS OF EGRESS UNDER THIS APPLICATION.
B00821739-P7
01/13/2026
Special inspection requirement — Energy Code Compliance Inspections
SOHAIL HUMAYUN
01/13/2026
Special inspection requirement — Post-installed Anchors
SOHAIL HUMAYUN
01/13/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
SOHAIL HUMAYUN
01/02/2026
Inspection — Pass-Final CND-Occupancy Inspection
Pass
View inspection ↗
11/21/2025
Objection resolved — Addressed
11/20/2025
Objection raised — Scope
11/13/2025
Filed — Alteration CO
INSTALLATION OF NEW PLYWOOD CONSTRUCTION FENCE AS PER PLAN. THERE IS NO CHANGE IN USE, OCCUPANCY, OR MEANS OF EGRESS UNDER THIS APPLICATION.
B00821739-P5
10/10/2025
Special inspection requirement — Fenestration air leakage
XIUCHENG LI
10/10/2025
Special inspection requirement — Fenestration areas
XIUCHENG LI
10/10/2025
Special inspection requirement — Structural Stability – Alterations of existing buildings
XIUCHENG LI
10/10/2025
Special inspection requirement — Insulation placement and R values
XIUCHENG LI
10/10/2025
Special inspection requirement — Air barrier - visual inspection
XIUCHENG LI
10/10/2025
Special inspection requirement — Fire-Resistant Penetrations and Joints
XIUCHENG LI
10/10/2025
Special inspection requirement — Construction Operations Influencing Adjacent Structures
XIUCHENG LI
10/10/2025
Special inspection requirement — Energy Code Compliance Inspections
XIUCHENG LI
10/10/2025
Special inspection requirement — Fire-Resistance Rated Construction
XIUCHENG LI
10/10/2025
Special inspection requirement — Fenestration and door U-factor and product ratings
XIUCHENG LI
10/01/2025
Objection resolved — Addressed
09/22/2025
Objection resolved — Addressed
09/22/2025
Objection resolved — Addressed
09/09/2025
Signed off — Alteration CO
INSTALLATION OF NEW PLYWOOD CONSTRUCTION FENCE AS PER PLAN. THERE IS NO CHANGE IN USE, OCCUPANCY, OR MEANS OF EGRESS UNDER THIS APPLICATION.
B00821739-S1
08/27/2025
Signed off — Alteration CO
INSTALLATION OF NEW PLYWOOD CONSTRUCTION FENCE AS PER PLAN. THERE IS NO CHANGE IN USE, OCCUPANCY, OR MEANS OF EGRESS UNDER THIS APPLICATION.
B00821739-S4
08/21/2025
Special inspection requirement — Ventilation and air distribution system
SOHAIL HUMAYUN
08/21/2025
Special inspection requirement — Mechanical Systems
SOHAIL HUMAYUN
08/21/2025
Special inspection requirement — Exhaust and Vent Systems in Plenums and Ducts
SOHAIL HUMAYUN
08/21/2025
Special inspection requirement — Fire-Resistant Penetrations and Joints
SOHAIL HUMAYUN
08/21/2025
Special inspection requirement — Energy Code Compliance Inspections
SOHAIL HUMAYUN
08/21/2025
Special inspection requirement — Final
SOHAIL HUMAYUN
08/21/2025
Special inspection requirement — HVAC-R and service water heating equipment
SOHAIL HUMAYUN
08/21/2025
Special inspection requirement — Maintenance information
SOHAIL HUMAYUN
08/21/2025
Special inspection requirement — HVAC-R and service water piping design and insulation
SOHAIL HUMAYUN
08/21/2025
Special inspection requirement — Duct leakage testing, insulation and design
SOHAIL HUMAYUN
08/21/2025
Special inspection requirement — HVAC-R and service water heating system controls
SOHAIL HUMAYUN
08/13/2025
Objection resolved — Addressed
08/13/2025
Objection resolved — Addressed
08/12/2025
Objection resolved — Addressed
08/12/2025
Objection resolved — Addressed
08/12/2025
Objection resolved — Addressed
08/12/2025
Objection resolved — Addressed
08/12/2025
Objection resolved — Addressed
08/12/2025
Objection resolved — Addressed
08/01/2025
Objection raised — Fire_Protection
08/01/2025
Objection raised — Structural
08/01/2025
Objection raised — Structural
08/01/2025
Objection raised — Scope
08/01/2025
Objection raised — Fire_Protection
08/01/2025
Objection raised — Scope
08/01/2025
Objection raised — Energy
08/01/2025
Objection raised — Structural
08/01/2025
Objection raised — Structural
07/24/2025
Objection raised — Structural
07/24/2025
Objection raised — Zoning
07/21/2025
Filed — Alteration CO
INSTALLATION OF NEW PLYWOOD CONSTRUCTION FENCE AS PER PLAN. THERE IS NO CHANGE IN USE, OCCUPANCY, OR MEANS OF EGRESS UNDER THIS APPLICATION.
B00821739-P4
07/21/2025
Filed — Alteration CO
INSTALLATION OF NEW PLYWOOD CONSTRUCTION FENCE AS PER PLAN. THERE IS NO CHANGE IN USE, OCCUPANCY, OR MEANS OF EGRESS UNDER THIS APPLICATION.
B00821739-P3
Latest 60 of 103 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWGeneral ConstructionPermit IssuedNY SIGNATURE BUILDERS LLC06/25/2025
DOB NOWPlumbingSigned-offGANIC PLUMBING & HTG INC03/17/2025
DOB NOWGeneral ConstructionPermit IssuedNY SIGNATURE BUILDERS LLC01/14/2025
DOB NOWStructuralSigned-offNY SIGNATURE BUILDERS LLC01/10/2025
DOB NOWConstruction FenceSigned-offNY SIGNATURE BUILDERS LLC01/10/2025
DOB NOWMechanical SystemsSigned-offNY SIGNATURE BUILDERS LLC01/09/2025
DOB NOWPlumbingSigned-offGANIC PLUMBING & HTG INC11/15/2024
DOB NOWGeneral ConstructionPermit IssuedNY SIGNATURE BUILDERS LLC04/02/2024
DOB NOWGeneral ConstructionPermit IssuedNY SIGNATURE BUILDERS LLC03/07/2024
DOB NOWConstruction FenceSigned-offNY SIGNATURE BUILDERS LLC01/26/2024
DOB NOWPlumbingSigned-offGANIC PLUMBING & HTG INC12/14/2023
DOB NOWMechanical SystemsSigned-offNY SIGNATURE BUILDERS LLC12/12/2023
DOB NOWStructuralSigned-offNY SIGNATURE BUILDERS LLC12/08/2023
DOB NOWGeneral ConstructionPermit IssuedNY SIGNATURE BUILDERS LLC12/04/2023
DOB NOWGeneral ConstructionSigned-offJ'S CUSTOM CONTRACTING IN10/27/2022
BIS—ISSUEDWEISS PLUMBING INC.12/12/1995
BISPLISSUEDWEISS PLUMBING AND HEATING12/05/1995
BIS—ISSUEDNEW WORLD BUILDERS INC.07/26/1994
1 project · most recent 03/04/2026
Air Conditioning Systems Heating Systems Ventilation Systems
FiledStatusContractorScopeMake / Model / Capacity
03/04/2026Permit IssuedNY SIGNATURE BUILDERS LLCAir Conditioning Systems, Heating Systems, Ventilation Systems
Cooling
Mitsubishi Electric SEZ-KD09NA4R1 9,000 BTU · Fan Coil Indoor ×16
MSZ-GS06NA-U1 6,000 BTU · Fan Coil Indoor ×4
MSZ-GS12NA-U2 12,000 BTU · Fan Coil Indoor ×2
MXZ-SM60NAM2-U1 60,000 BTU · Heat Pump Outdoor ×2
MXZSM48NAM2-U1 48,000 BTU · Vrf Outdoor ×2
SEZ-KD18NA4R1 18,000 BTU · Vrf Indoor ×2
Heating
Airefixture SoHo-w 10,400 BTU ×2
Airfixture SoHo-w 7,200 BTU ×2
Ventilation
Continental DVK100B-C, FV-05-11VK1, FV-11-15VK1, 50 CFM · Exhaust Fan ×20
1 project · most recent 03/04/2026
Gas Storm Water/Sanitary
FiledStatusContractorScope
03/04/2026Signed-offGANIC PLUMBING & HTG INCGas, Storm, Water/Sanitary
1 project · most recent 11/17/2025
General Wiring
FiledStatusContractorScope
11/17/2025CompleteCRESCO ELECTRICAL CORPGeneral Wiring
1 project · most recent 03/04/2026
Fence
FiledStatusContractorScope
03/04/2026Permit IssuedNY SIGNATURE BUILDERS LLCFence
▾Field Inspections (DOB CAP) — 7
DateTypeResultReport
08/28/2026Pass-Final General Construction Non-Directive 14PassView ↗
01/02/2026Pass-Final CND-Occupancy InspectionPassView ↗
03/10/2025Certified Gas-Gas-Piping-RoughingCertifiedView ↗
03/10/2025Certified Storm Drainage-ST-Piping-RoughingCertifiedView ↗
01/29/2025Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
10/11/2024Certified Storm Drainage-ST-Piping-UndergroundCertifiedView ↗
10/11/2024Certified Water and Sanitary-WS-Sanitary Piping-UndergroundCertifiedView ↗
▾Special Inspection Requirements (DOB NOW) — 48
DateRequirementInspectorRole
03/18/2026Energy Code Compliance InspectionsSOHAIL HUMAYUNprogress
03/18/2026Post-installed AnchorsSOHAIL HUMAYUNspecial
03/18/2026Fire-Resistant Penetrations and JointsSOHAIL HUMAYUNspecial
01/13/2026Energy Code Compliance InspectionsSOHAIL HUMAYUNprogress
01/13/2026Post-installed AnchorsSOHAIL HUMAYUNspecial
01/13/2026Fire-Resistant Penetrations and JointsSOHAIL HUMAYUNspecial
10/10/2025Fenestration air leakageXIUCHENG LIenergy_progress
10/10/2025Fenestration areasXIUCHENG LIenergy_progress
10/10/2025Structural Stability – Alterations of existing buildingsXIUCHENG LIspecial
10/10/2025Insulation placement and R valuesXIUCHENG LIenergy_progress
10/10/2025Air barrier - visual inspectionXIUCHENG LIenergy_progress
10/10/2025Fire-Resistant Penetrations and JointsXIUCHENG LIspecial
10/10/2025Construction Operations Influencing Adjacent StructuresXIUCHENG LIspecial
10/10/2025Energy Code Compliance InspectionsXIUCHENG LIprogress
10/10/2025Fire-Resistance Rated ConstructionXIUCHENG LIprogress
10/10/2025Fenestration and door U-factor and product ratingsXIUCHENG LIenergy_progress
08/21/2025Ventilation and air distribution systemSOHAIL HUMAYUNenergy_progress
08/21/2025Mechanical SystemsSOHAIL HUMAYUNspecial
08/21/2025Exhaust and Vent Systems in Plenums and DuctsSOHAIL HUMAYUNspecial
08/21/2025Fire-Resistant Penetrations and JointsSOHAIL HUMAYUNspecial
08/21/2025Energy Code Compliance InspectionsSOHAIL HUMAYUNprogress
08/21/2025FinalSOHAIL HUMAYUNprogress
08/21/2025HVAC-R and service water heating equipmentSOHAIL HUMAYUNenergy_progress
08/21/2025Maintenance informationSOHAIL HUMAYUNenergy_progress
08/21/2025HVAC-R and service water piping design and insulationSOHAIL HUMAYUNenergy_progress
Latest 25 of 48.
▾Documents — 81 on file (BIS + DOB NOW)
▸Plans & Drawings12
▸DOB NOWPlans/Sketch12
08/28/2026B08007979-I1Request digital key ↗
08/18/2026B00821739-I1Request digital key ↗
08/18/2026B00821739-S2Request digital key ↗
Showing 3 of 12 on file for this type
▸Applications & Permits1
▸BISPLAN / WORK APPROVAL APPLICATION1
03/25/2022301992618Open ↗
▸Zoning, Tax Lot & Property Records5
▸DOB NOWZD1: DOB Zoning Diagram2
08/13/2026B00821739-P3Open ↗
08/13/2026B00821739-I1Open ↗
▸DOB NOWZoning Exhibit form (1-5)2
08/13/2026B00821739-P3Open ↗
08/13/2026B00821739-I1Open ↗
▸DOB NOWHouse Number Verification: TOPO Stamp1
08/13/2026B00821739-I1Open ↗
▸Seals & Professional Certifications40
▸DOB NOWProgress Inspector Seal & Signature16
09/29/2026B00821739-S3Open ↗
09/26/2026B00821739-P3Open ↗
09/26/2026B00821739-P3Open ↗
Showing 3 of 16 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature12
09/29/2026B00821739-S3Open ↗
09/26/2026B00821739-P3Open ↗
09/01/2026B00821739-P1Open ↗
Showing 3 of 12 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature12
08/28/2026B08007979-I1Open ↗
08/18/2026B00821739-I1Open ↗
08/18/2026B00821739-P5Open ↗
Showing 3 of 12 on file for this type
▸Safety & Tenant Protection3
▸DOB NOWStreet Tree Checklist2
08/13/2026B00821739-I1Open ↗
08/13/2026B00821739-P3Open ↗
▸DOB NOWParks Department Acknowledgment Letter for Street Trees Plan1
08/13/2026B00821739-I1Open ↗
▸Environmental & Asbestos12
▸DOB NOWDEP ACP-5: Asbestos Assessment Report12
08/28/2026B08007979-I1Open ↗
08/18/2026B00821739-S1Open ↗
08/18/2026B00821739-I1Open ↗
Showing 3 of 12 on file for this type
▸Other Documents8
▸DOB NOWSite Survey: Initial2
08/13/2026B00821739-P3Open ↗
08/13/2026B00821739-I1Open ↗
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone2
08/13/2026B00821739-P3Open ↗
08/13/2026B00821739-I1Open ↗
▸DOB NOWPlot Diagram2
08/13/2026B00821739-I1Open ↗
08/13/2026B00821739-P3Open ↗
▸DOB NOWProperty Ownership Certification2
08/18/2026B00821739-I1Open ↗
08/18/2026B00821739-P3Open ↗