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Two family converted from one family
316 21ST STREET
BROOKLYN · BIN 3017557
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1940Year Built
2Stories
B3Building Class
R6BZoning
2,662 sfGross Floor Area
2Units
0 Active ViolationsFDNY Report ↗
Two family converted from one family · 1,703 sf lot · 1.56 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralMechanicalPlumbingFire ProtectionEquipment
Names shown beside floors are taken automatically from the text of filed documents and may be incomplete or wrong.
RoofAlt2 Renovation15p · 1 filing · 20 docs
Floor 2Alt2 Renovation30p · 2 filings · 20 docs
Floor 1Alt2 Renovation31p · 3 filings · 20 docs
Cellar5p · 1 filing · 20 docs
Basement15p · 1 filing · 20 docs
Sub-BasementAlt2 Renovation15p · 1 filing · 20 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
Galif Properties103/22/2026
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
05/25/2023$3.0M—GALIF PROPERTIES LLC → Private party$1,127/sf building
01/21/2022$1.2M—Private party → GALIF PROPERTIES LLC$460/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
Joshua Brandfonbrener Architect1003/29/2023
Project Tactical Solutions207/13/2022
Morozov103/15/2022
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
LFNY Consultants1103/21/2026
BSGNY403/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
Interboro Property ManagementGeneral Contractor707/08/2026
Interboro Property ManagementScaffold203/21/2026
AMC Plumbing, Heating & CLNGPlumbing207/08/2026
Enobrac PlumbingFire Protection107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
Moore Associates3408803/29/2023
Beyond Arch3600303/15/2022
Building Lifecycle
All (108)Filed (13)Permit Issued (9)Signed Off (7)Violation (7)Inspection (7)Objection (36)Special Inspection (29)
03/31/2023
Special inspection requirement — Exterior Insulation and Finish Systems (EIFS)
josh brandfonbrener
03/31/2023
Special inspection requirement — Energy Code Compliance Inspections
josh brandfonbrener
03/31/2023
Special inspection requirement — Preliminary
josh brandfonbrener
03/31/2023
Special inspection requirement — Fire-Resistance Rated Construction
josh brandfonbrener
03/31/2023
Special inspection requirement — Fire-Resistant Penetrations and Joints
JAMES MOORE
03/31/2023
Special inspection requirement — Structural Stability – Alterations of existing buildings
JAMES MOORE
03/31/2023
Special inspection requirement — Masonry
JAMES MOORE
03/29/2023
Filed — Alteration CO
Converting 1 family to 2 family. legalization of exiting rear yard 10' addition and adding second floor addition.
B00710426-P2
03/29/2023
Special inspection requirement — Preliminary
josh brandfonbrener
03/29/2023
Special inspection requirement — Exterior Insulation and Finish Systems (EIFS)
josh brandfonbrener
03/29/2023
Special inspection requirement — Fire-Resistant Penetrations and Joints
JAMES MOORE
03/29/2023
Special inspection requirement — Masonry
JAMES MOORE
03/29/2023
Special inspection requirement — Structural Stability – Alterations of existing buildings
JAMES MOORE
03/29/2023
Special inspection requirement — Energy Code Compliance Inspections
josh brandfonbrener
03/29/2023
Special inspection requirement — Fire-Resistance Rated Construction
josh brandfonbrener
03/17/2023
Signed off — Alteration
plumbing work for two family dwelling. removal of existing boiler and hot water heater. renovations of bathrooms and kitchens.
B00674085-S3
03/17/2023
Signed off — Alteration
plumbing work for two family dwelling. removal of existing boiler and hot water heater. renovations of bathrooms and kitchens.
B00674085-I1
03/16/2023
Signed off — Alteration
plumbing work for two family dwelling. removal of existing boiler and hot water heater. renovations of bathrooms and kitchens.
B00674085-S4
03/14/2023
Signed off — Alteration
B00728500-I1
03/10/2023
Inspection — Certified Sprinkler-SP-Piping Dry/Wet-Hydrostatic Test
Certified
View inspection ↗
03/09/2023
Special inspection requirement — Structural Cold-Formed Steel
JAMES MOORE
03/09/2023
Special inspection requirement — Final
josh brandfonbrener
03/09/2023
Special inspection requirement — Structural Stability – Alterations of existing buildings
JAMES MOORE
03/08/2023
Filed — Alteration
plumbing work for two family dwelling. removal of existing boiler and hot water heater. renovations of bathrooms and kitchens.
B00674085-P2
03/07/2023
Filed — Alteration CO
Converting 1 family to 2 family. legalization of exiting rear yard 10' addition and adding second floor addition.
B00710426-P1
03/07/2023
Special inspection requirement — Fire-Resistant Penetrations and Joints
JAMES MOORE
03/07/2023
Special inspection requirement — Preliminary
josh brandfonbrener
03/07/2023
Special inspection requirement — Energy Code Compliance Inspections
josh brandfonbrener
03/07/2023
Special inspection requirement — Structural Stability – Alterations of existing buildings
JAMES MOORE
03/07/2023
Special inspection requirement — Masonry
JAMES MOORE
03/07/2023
Special inspection requirement — Exterior Insulation and Finish Systems (EIFS)
josh brandfonbrener
03/07/2023
Special inspection requirement — Fire-Resistance Rated Construction
josh brandfonbrener
03/06/2023
Special inspection requirement — Structural Stability – Alterations of existing buildings
JAMES MOORE
03/06/2023
Special inspection requirement — Final
josh brandfonbrener
03/06/2023
Special inspection requirement — Structural Cold-Formed Steel
JAMES MOORE
03/03/2023
Inspection — Certified Sprinkler-SP-Fixtures-Finish
Certified
View inspection ↗
02/28/2023
Signed off — Alteration
plumbing work for two family dwelling. removal of existing boiler and hot water heater. renovations of bathrooms and kitchens.
B00674085-S2
02/27/2023
Signed off — Alteration
plumbing work for two family dwelling. removal of existing boiler and hot water heater. renovations of bathrooms and kitchens.
B00674085-S1
02/24/2023
Inspection — Pass-Final CND-Occupancy Inspection
Pass
View inspection ↗
02/23/2023
Signed off — Alteration CO
Converting 1 family to 2 family. legalization of exiting rear yard 10' addition and adding second floor addition.
B00710426-S1
02/21/2023
Inspection — Certified Remove/Cap - work done in accordance with code
Certified
View inspection ↗
02/21/2023
Inspection — Certified Water and Sanitary-WS-Fixtures-Finish
Certified
View inspection ↗
01/13/2023
Permit issued — Plumbing
B00674085-S1-PL
11/22/2022
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Roughing
Certified
View inspection ↗
11/18/2022
Permit issued — Sprinklers
B00674085-S4-EW-SP
08/01/2022
Violation issued (ECB, closed)
Construction
07/13/2022
Filed — Alteration
B00728500-P1
06/24/2022
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Underground
Certified
View inspection ↗
06/22/2022
Permit issued — General Construction
B00710426-I1-GC
06/10/2022
Permit issued — Structural
B00710426-S1-ST
06/03/2022
Objection raised — Other
06/03/2022
Objection resolved — Addressed
05/13/2022
Permit issued — Construction Fence
B00728500-I1-FN
05/12/2022
Filed — Alteration
B00728500-I1
05/11/2022
Filed — Alteration
plumbing work for two family dwelling. removal of existing boiler and hot water heater. renovations of bathrooms and kitchens.
B00674085-P1
04/20/2022
Violation issued (ECB, closed)
Construction
04/20/2022
Violation issued (ECB, closed)
Construction
04/20/2022
Violation issued (ECB, closed)
Construction
04/20/2022
Violation issued (ECB, closed)
Construction
04/20/2022
Violation issued (ECB, closed)
Construction
Latest 60 of 108 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWPlumbingSigned-offAMC Plumbing, Heating & CLNG01/13/2023
DOB NOWSprinklersSigned-offEnobrac Plumbing11/18/2022
DOB NOWGeneral ConstructionPermit IssuedInterboro Property Management06/22/2022
DOB NOWStructuralSigned-offInterboro Property Management06/10/2022
DOB NOWConstruction FenceSigned-offInterboro Property Management05/13/2022
DOB NOWStructuralSigned-offInterboro Property Management04/02/2022
DOB NOWPlumbingSigned-offAMC Plumbing, Heating & CLNG03/31/2022
DOB NOWMechanical SystemsSigned-offInterboro Property Management03/23/2022
DOB NOWGeneral ConstructionSigned-offInterboro Property Management03/09/2022
1 project · most recent 01/31/2023
General Wiring
FiledStatusContractorScope
01/31/2023CompleteRigid ElectricGeneral Wiring
▾Field Inspections (DOB CAP) — 7
DateTypeResultReport
03/10/2023Certified Sprinkler-SP-Piping Dry/Wet-Hydrostatic TestCertifiedView ↗
03/03/2023Certified Sprinkler-SP-Fixtures-FinishCertifiedView ↗
02/24/2023Pass-Final CND-Occupancy InspectionPassView ↗
02/21/2023Certified Remove/Cap - work done in accordance with codeCertifiedView ↗
02/21/2023Certified Water and Sanitary-WS-Fixtures-FinishCertifiedView ↗
11/22/2022Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
06/24/2022Certified Water and Sanitary-WS-Sanitary Piping-UndergroundCertifiedView ↗
▾Special Inspection Requirements (DOB NOW) — 29
DateRequirementInspectorRole
03/31/2023Exterior Insulation and Finish Systems (EIFS)josh brandfonbrenerspecial
03/31/2023Energy Code Compliance Inspectionsjosh brandfonbrenerprogress
03/31/2023Preliminaryjosh brandfonbrenerprogress
03/31/2023Fire-Resistance Rated Constructionjosh brandfonbrenerprogress
03/31/2023Fire-Resistant Penetrations and JointsJAMES MOOREspecial
03/31/2023Structural Stability – Alterations of existing buildingsJAMES MOOREspecial
03/31/2023MasonryJAMES MOOREspecial
03/29/2023Preliminaryjosh brandfonbrenerprogress
03/29/2023Exterior Insulation and Finish Systems (EIFS)josh brandfonbrenerspecial
03/29/2023Fire-Resistant Penetrations and JointsJAMES MOOREspecial
03/29/2023MasonryJAMES MOOREspecial
03/29/2023Structural Stability – Alterations of existing buildingsJAMES MOOREspecial
03/29/2023Energy Code Compliance Inspectionsjosh brandfonbrenerprogress
03/29/2023Fire-Resistance Rated Constructionjosh brandfonbrenerprogress
03/09/2023Structural Cold-Formed SteelJAMES MOOREspecial
03/09/2023Finaljosh brandfonbrenerprogress
03/09/2023Structural Stability – Alterations of existing buildingsJAMES MOOREspecial
03/07/2023Fire-Resistant Penetrations and JointsJAMES MOOREspecial
03/07/2023Preliminaryjosh brandfonbrenerprogress
03/07/2023Energy Code Compliance Inspectionsjosh brandfonbrenerprogress
03/07/2023Structural Stability – Alterations of existing buildingsJAMES MOOREspecial
03/07/2023MasonryJAMES MOOREspecial
03/07/2023Exterior Insulation and Finish Systems (EIFS)josh brandfonbrenerspecial
03/07/2023Fire-Resistance Rated Constructionjosh brandfonbrenerprogress
03/06/2023Structural Stability – Alterations of existing buildingsJAMES MOOREspecial
Latest 25 of 29.
▾Documents — 85 on file (BIS + DOB NOW)
▸Plans & Drawings13
▸DOB NOWPlans/Sketch13
08/30/2026B00674085-S3Request digital key ↗
08/30/2026B00674085-P2Request digital key ↗
08/30/2026B00674085-P1Request digital key ↗
Showing 3 of 13 on file for this type
▸Zoning, Tax Lot & Property Records3
▸DOB NOWZD1: DOB Zoning Diagram3
08/13/2026B00710426-I1Open ↗
08/13/2026B00710426-P1Open ↗
08/13/2026B00710426-P2Open ↗
▸Seals & Professional Certifications42
▸DOB NOWSpecial Inspector Seal & Signature17
10/01/2026B00710426-I1Open ↗
10/01/2026B00710426-I1Open ↗
10/01/2026B00710426-I1Open ↗
Showing 3 of 17 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature13
08/30/2026B00674085-S2Open ↗
08/30/2026B00674085-S3Open ↗
08/30/2026B00674085-S4Open ↗
Showing 3 of 13 on file for this type
▸DOB NOWProgress Inspector Seal & Signature12
10/01/2026B00710426-I1Open ↗
10/01/2026B00710426-I1Open ↗
10/01/2026B00710426-I1Open ↗
Showing 3 of 12 on file for this type
▸Safety & Tenant Protection6
▸DOB NOWStreet Tree Checklist3
08/13/2026B00710426-I1Open ↗
08/13/2026B00710426-P1Open ↗
08/13/2026B00710426-P2Open ↗
▸DOB NOWStreet Tree Sign Off1
08/13/2026B00710426-I1Open ↗
▸DOB NOWStreet Trees Site Plan1
08/13/2026B00710426-I1Open ↗
▸DOB NOWParks Department Acknowledgment Letter for Street Trees Plan1
08/13/2026B00710426-I1Open ↗
▸Environmental & Asbestos7
▸DOB NOWDEP ACP-20/ACP-21: Asbestos Project Conditional Completion Form/Asbestos Project Completion Form7
08/30/2026B00674085-S2Open ↗
08/30/2026B00674085-S4Open ↗
08/30/2026B00674085-S3Open ↗
Showing 3 of 7 on file for this type
▸Energy Compliance1
▸DOB NOWEN2: As Built Energy Analysis1
08/30/2026B00674085-I1Open ↗
▸Other Documents13
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone3
08/13/2026B00710426-P1Open ↗
08/13/2026B00710426-I1Open ↗
08/13/2026B00710426-P2Open ↗
▸DOB NOWPlot Diagram3
08/13/2026B00710426-P2Open ↗
08/13/2026B00710426-I1Open ↗
08/13/2026B00710426-P1Open ↗
▸DOB NOWProperty Ownership Certification3
08/27/2026B00710426-P1Open ↗
08/27/2026B00710426-P2Open ↗
08/15/2026B00710426-I1Open ↗
▸DOB NOWSite Survey: Initial3
08/13/2026B00710426-P1Open ↗
08/13/2026B00710426-P2Open ↗
08/13/2026B00710426-I1Open ↗
▸DOB NOWFinal Survey1
08/13/2026B00710426-I1Open ↗