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Two family converted from one family
317 12TH STREET
BROOKLYN · Park Slope · BIN 3022970
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1901Year Built
2Stories
B3Building Class
R6BZoning
1,798 sfGross Floor Area
2Units
0 Active ViolationsFDNY Report ↗
Two family converted from one family · 1,875 sf lot · 0.96 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralMechanicalPlumbingFire ProtectionCivilGeneral
Names shown beside floors are taken automatically from the text of filed documents and may be incomplete or wrong.
Permit Issued — active, not yet Signed-off
RoofUnder Construction103p · 1 filing · 20 docs
AtticUnder Construction103p · 1 filing · 20 docs
Floor 2Under Construction106p · 1 filing · 20 docs
Floor 1Under Construction104p · 1 filing · 20 docs
CellarUnder Construction113p · 1 filing · 20 docs
BasementUnder Construction5p · 1 filing · 20 docs
Sub-BasementUnder Construction103p · 1 filing · 20 docs
Site & exteriorTemporary construction fenceUnder Construction12p · 2 filings · 20 docs
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
08/02/2019$2.3M—Private party → Private party$1,286/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
Barker Freeman Design Office1410/27/2025
Yaker Engineering108/29/2022
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
Metro Design2403/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
N.P. Classic ConstructionGeneral Contractor2007/08/2026
N.P. Classic ConstructionScaffold507/08/2026
Nice PlumbingPlumbing407/08/2026
Falco Electrical ServicesElectrical103/21/2026
Mega PlumbingFire Protection107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
Barker Freeman Design Off3442610/27/2025
CL Engineering6781810/27/2025
NKM Engineering6244312/05/2024
D&E Build Evergreen I9342105/26/2022
Building Lifecycle
All (82)Filed (15)Permit Issued (20)Signed Off (1)Violation (3)Inspection (1)Objection (12)Special Inspection (30)
03/25/2026
Permit issued — Construction Fence
B00796172-I1-FN
03/17/2026
Permit issued — Structural
B00549317-S3-ST
03/16/2026
Permit issued — Mechanical Systems
B00549317-I1-GC-CX
10/27/2025
Filed — Alteration
Subsequent application filed for Sprinkler work and plumbing components for Sprinkler system.
B00549317-P9
10/01/2025
Permit issued — Plumbing
B00549317-S2-EW-SP
08/13/2025
Signed off — Alteration
Subsequent application filed for Sprinkler work and plumbing components for Sprinkler system.
B00549317-S4
07/08/2025
Special inspection requirement — Fire-Resistant Penetrations and Joints
Danny Chen
07/08/2025
Special inspection requirement — Sprinkler Systems
Danny Chen
06/24/2025
Filed — Alteration
Subsequent application filed for Sprinkler work and plumbing components for Sprinkler system.
B00549317-A1
06/18/2025
Special inspection requirement — Sprinkler Systems
06/18/2025
Special inspection requirement — Fire-Resistant Penetrations and Joints
04/15/2025
Permit issued — Structural
B00549317-S3-ST
03/19/2025
Permit issued — Plumbing
B00549317-S1-PL
03/11/2025
Permit issued — General Construction
B00549317-I1-GC-CX
12/30/2024
Inspection — Pass-Final CND-Occupancy Inspection
Pass
View inspection ↗
12/13/2024
Special inspection requirement — HVAC-R and service water heating equipment
ALEXANDRA BARKER
12/13/2024
Special inspection requirement — HVAC-R and service water heating system controls
ALEXANDRA BARKER
12/13/2024
Special inspection requirement — Maintenance information
ALEXANDRA BARKER
12/12/2024
Special inspection requirement — HVAC-R and service water piping design and insulation
ALEXANDRA BARKER
12/12/2024
Special inspection requirement — Fire-Resistant Penetrations and Joints
ALEXANDRA BARKER
12/12/2024
Special inspection requirement — Structural Stability – Alterations of existing buildings
CHRISTIAN LOZADA
12/12/2024
Special inspection requirement — Subgrade Inspections
CHRISTIAN LOZADA
12/12/2024
Special inspection requirement — Underpinning
NARESH MAHANGU
12/12/2024
Special inspection requirement — Fire-Resistant Penetrations and Joints
CHRISTIAN LOZADA
12/12/2024
Special inspection requirement — Subsurface Investigations (Borings/Test Pits)
Joseph Bizarroque
12/12/2024
Special inspection requirement — Footing and Foundation
CHRISTIAN LOZADA
12/12/2024
Special inspection requirement — Private On-Site Storm Water Disposal Systems-, and Detention Facilities, Installation
CHRISTIAN LOZADA
12/12/2024
Special inspection requirement — Energy Code Compliance Inspections
ALEXANDRA BARKER
12/12/2024
Special inspection requirement — Excavations - Sheeting, Shoring, and Bracing
CHRISTIAN LOZADA
12/12/2024
Special inspection requirement — Final
CHRISTIAN LOZADA
12/12/2024
Special inspection requirement — Concrete - Cast-In-Place
CHRISTIAN LOZADA
12/05/2024
Filed — Alteration
Subsequent application filed for Sprinkler work and plumbing components for Sprinkler system.
B00549317-P8
12/04/2024
Permit issued — Foundation
B00549317-S4-EA
11/13/2024
Permit issued — Construction Fence
B00796172-I1-FN
10/22/2024
Permit issued — Mechanical Systems
B00549317-I1-GC-CX
08/16/2024
Special inspection requirement — Air barrier - visual inspection
ALEXANDRA BARKER
08/16/2024
Special inspection requirement — Fenestration areas
ALEXANDRA BARKER
08/16/2024
Special inspection requirement — Final
ALEXANDRA BARKER
08/16/2024
Special inspection requirement — Fire-Resistance Rated Construction
ALEXANDRA BARKER
08/16/2024
Special inspection requirement — Fire-Resistant Penetrations and Joints
ALEXANDRA BARKER
08/16/2024
Special inspection requirement — Mechanical Systems
ALEXANDRA BARKER
08/16/2024
Special inspection requirement — Insulation placement and R values
ALEXANDRA BARKER
08/16/2024
Special inspection requirement — Maintenance information
ALEXANDRA BARKER
08/16/2024
Special inspection requirement — Interior lighting power
ALEXANDRA BARKER
08/16/2024
Special inspection requirement — Permanent certificate
ALEXANDRA BARKER
08/08/2024
Objection resolved — Addressed
08/08/2024
Objection resolved — Addressed
07/25/2024
Objection raised — Fire_Protection
07/25/2024
Objection raised — Energy
07/23/2024
Filed — Alteration
Subsequent application filed for Sprinkler work and plumbing components for Sprinkler system.
B00549317-P5
07/12/2024
Filed — Alteration
Subsequent application filed for Sprinkler work and plumbing components for Sprinkler system.
B00549317-P6
06/25/2024
Filed — Alteration
Subsequent application filed for Sprinkler work and plumbing components for Sprinkler system.
B00549317-P4
03/11/2024
Permit issued — Structural
B00549317-S3-ST
12/22/2023
Permit issued — Earth Work
B00549317-S4-EA
12/22/2023
Permit issued — Foundation
B00549317-S4-FO
12/13/2023
Permit issued — Structural
B00549317-S3-ST
11/21/2023
Permit issued — General Construction
B00549317-I1-GC-CX
11/21/2023
Permit issued — Construction Fence
B00796172-I1-FN
10/25/2023
Permit issued — Plumbing
B00549317-S1-PL
10/24/2023
Violation issued (ECB, closed)
Construction
Latest 60 of 82 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWConstruction FencePermit IssuedN.P. Classic Construction03/25/2026
DOB NOWStructuralPermit IssuedN.P. Classic Construction03/17/2026
DOB NOWMechanical SystemsPermit IssuedN.P. Classic Construction03/16/2026
DOB NOWSprinklersPermit IssuedReal Plumbing10/01/2025
DOB NOWStructuralPermit IssuedN.P. Classic Construction04/15/2025
DOB NOWPlumbingPermit IssuedNice Plumbing03/19/2025
DOB NOWGeneral ConstructionPermit IssuedN.P. Classic Construction03/11/2025
DOB NOWFoundationSigned-offN.P. Classic Construction12/04/2024
DOB NOWConstruction FencePermit IssuedN.P. Classic Construction11/13/2024
DOB NOWMechanical SystemsPermit IssuedN.P. Classic Construction10/22/2024
DOB NOWStructuralPermit IssuedN.P. Classic Construction03/11/2024
DOB NOWEarth WorkSigned-offN.P. Classic Construction12/22/2023
DOB NOWFoundationSigned-offN.P. Classic Construction12/22/2023
DOB NOWStructuralPermit IssuedN.P. Classic Construction12/13/2023
DOB NOWGeneral ConstructionPermit IssuedN.P. Classic Construction11/21/2023
DOB NOWConstruction FencePermit IssuedN.P. Classic Construction11/21/2023
DOB NOWPlumbingPermit IssuedNice Plumbing10/25/2023
DOB NOWConstruction FencePermit IssuedN.P. Classic Construction09/16/2022
DOB NOWMechanical SystemsPermit IssuedN.P. Classic Construction08/16/2022
DOB NOWPlumbingPermit IssuedNice Plumbing08/02/2022
1 project · most recent 10/27/2025
Air Conditioning Systems Associated Ducts and Piping
FiledStatusContractorScopeMake / Model / Capacity
10/27/2025Permit IssuedN.P. Classic ConstructionAir Conditioning Systems, Associated Ducts and Piping
Cooling
Mitsubishi Electric CU-MXZ-4C36NA 36,000 BTU · Split System ×6
CU-MXZ-8C48NA 48,000 BTU · Vrf Outdoor ×3
Ducts & Piping
N/A n/a ×3
1 project · most recent 10/27/2025
Sprinkler System
FiledStatusContractorScope
10/27/2025Permit IssuedReal PlumbingSprinkler System
1 project · most recent 10/27/2025
Gas Storm Water/Sanitary
FiledStatusContractorScope
10/27/2025Permit IssuedNice PlumbingGas, Storm, Water/Sanitary
1 project · most recent 10/20/2023
General Wiring
FiledStatusContractorScope
10/20/2023Permit IssuedFalco Electrical ServicesGeneral Wiring
1 project · most recent 10/27/2025
Steel Masonry Wood
FiledStatusContractorScope
10/27/2025Permit IssuedN.P. Classic ConstructionSteel, Masonry, Wood
1 project · most recent 08/29/2022
Fence
FiledStatusContractorScope
08/29/2022Permit IssuedN.P. Classic ConstructionFence
1 project · most recent 10/27/2025
Earthwork
FiledStatusContractorScope
10/27/2025Permit IssuedN.P. Classic ConstructionEarthwork
▾Field Inspections (DOB CAP) — 1
DateTypeResultReport
12/30/2024Pass-Final CND-Occupancy InspectionPassView ↗
▾Special Inspection Requirements (DOB NOW) — 82
DateRequirementInspectorRole
07/08/2025Sprinkler SystemsDanny Chenspecial
07/08/2025Fire-Resistant Penetrations and JointsDanny Chenspecial
06/18/2025Fire-Resistant Penetrations and Joints—special
06/18/2025Sprinkler Systems—special
12/13/2024HVAC-R and service water heating equipmentALEXANDRA BARKERenergy_progress
12/13/2024HVAC-R and service water heating system controlsALEXANDRA BARKERenergy_progress
12/13/2024Maintenance informationALEXANDRA BARKERenergy_progress
12/12/2024Private On-Site Storm Water Disposal Systems-, and Detention Facilities, InstallationCHRISTIAN LOZADAspecial
12/12/2024Fire-Resistant Penetrations and JointsALEXANDRA BARKERspecial
12/12/2024FinalCHRISTIAN LOZADAprogress
12/12/2024Footing and FoundationCHRISTIAN LOZADAprogress
12/12/2024UnderpinningNARESH MAHANGUspecial
12/12/2024Fire-Resistant Penetrations and JointsCHRISTIAN LOZADAspecial
12/12/2024Structural Stability – Alterations of existing buildingsCHRISTIAN LOZADAspecial
12/12/2024Excavations - Sheeting, Shoring, and BracingCHRISTIAN LOZADAspecial
12/12/2024Concrete - Cast-In-PlaceCHRISTIAN LOZADAspecial
12/12/2024Subgrade InspectionsCHRISTIAN LOZADAspecial
12/12/2024Subsurface Investigations (Borings/Test Pits)Joseph Bizarroquespecial
12/12/2024HVAC-R and service water piping design and insulationALEXANDRA BARKERenergy_progress
12/12/2024Energy Code Compliance InspectionsALEXANDRA BARKERprogress
08/16/2024HVAC-R and service water heating equipmentALEXANDRA BARKERenergy_progress
08/16/2024Interior lighting powerALEXANDRA BARKERenergy_progress
08/16/2024Maintenance informationALEXANDRA BARKERenergy_progress
08/16/2024HVAC-R and service water heating system controlsALEXANDRA BARKERenergy_progress
08/16/2024Mechanical SystemsALEXANDRA BARKERspecial
Latest 25 of 82.
▾Documents — 100 on file (BIS + DOB NOW)
▸Plans & Drawings16
▸DOB NOWPlans/Sketch16
08/29/2026B00549317-S1Request digital key ↗
08/29/2026B00549317-S2Request digital key ↗
08/29/2026B00549317-S3Request digital key ↗
Showing 3 of 16 on file for this type
▸Zoning, Tax Lot & Property Records6
▸DOB NOWZD1: DOB Zoning Diagram3
08/13/2026B00549317-P3Open ↗
08/13/2026B00549317-P6Open ↗
08/13/2026B00549317-I1Open ↗
▸DOB NOWZoning Exhibit form (1-5)3
08/13/2026B00549317-P6Open ↗
08/13/2026B00549317-P3Open ↗
08/13/2026B00549317-I1Open ↗
▸Seals & Professional Certifications54
▸DOB NOWSpecial Inspector Seal & Signature25
10/04/2026B00549317-P6Open ↗
09/21/2026B00549317-P7Open ↗
09/21/2026B00549317-P7Open ↗
Showing 3 of 25 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature16
08/29/2026B00549317-P4Open ↗
08/29/2026B00549317-S1Open ↗
08/29/2026B00549317-S2Open ↗
Showing 3 of 16 on file for this type
▸DOB NOWProgress Inspector Seal & Signature13
10/04/2026B00549317-P6Open ↗
10/04/2026B00549317-P6Open ↗
09/21/2026B00549317-P7Open ↗
Showing 3 of 13 on file for this type
▸Environmental & Asbestos5
▸DOB NOWDEP ACP-20/ACP-21: Asbestos Project Conditional Completion Form/Asbestos Project Completion Form5
08/29/2026B00549317-S3Open ↗
08/29/2026B00549317-I1Open ↗
08/29/2026B00549317-S1Open ↗
Showing 3 of 5 on file for this type
▸Inspections & Test Reports6
▸DOB NOWSOIL REPORT4
08/13/2026B00549317-S4Open ↗
08/13/2026B00549317-P8Open ↗
08/13/2026B00549317-P5Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWTR4 Plot Diagram1
08/13/2026B00549317-S4Open ↗
▸DOB NOWTR4 Test Report and Plot Diagram1
08/13/2026B00549317-S4Open ↗
▸Cost, Insurance & Ownership2
▸DOB NOWCertification by Insurance Broker or Agency1
08/13/2026B00549317-I1Open ↗
▸DOB NOWCertificate of Insurance1
08/13/2026B00549317-I1Open ↗
▸Other Documents11
▸DOB NOWSite Survey: Initial3
08/13/2026B00549317-P6Open ↗
08/13/2026B00549317-P3Open ↗
08/13/2026B00549317-I1Open ↗
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone3
08/13/2026B00549317-P6Open ↗
08/13/2026B00549317-I1Open ↗
08/13/2026B00549317-P3Open ↗
▸DOB NOWPlot Diagram3
08/13/2026B00549317-I1Open ↗
08/13/2026B00549317-P6Open ↗
08/13/2026B00549317-P3Open ↗
▸DOB NOWAdjoining Owners Notification1
08/13/2026B00549317-S4Open ↗
▸DOB NOWAdditional Insured Authorizations1
08/13/2026B00549317-I1Open ↗