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Two family converted from one family
410 BERGEN STREET
BROOKLYN · Park Slope · BIN 3018532
💬 Discuss this project
1910Year Built
2Stories
B3Building Class
R6BZoning
2,400 sfGross Floor Area
2Units
Two family converted from one family · 2,000 sf lot · 1.2 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralMechanical
Roof3p · 1 filing · 20 docs
Floor 25p · 1 filing · 20 docs
Floor 14p · 1 filing · 20 docs
Cellar2p · 1 filing · 20 docs
Basement4p · 1 filing · 20 docs
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
11/28/2023$2.9M—Private party → Private party$1,211/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
HD ARCHITECTURE PLLC507/27/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
EFL SERVICES INCGeneral Contractor907/08/2026
GREGG NY PLUMBING, INCPlumbing107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
HD ARCHITECTURE PLLC6806307/27/2026
Building Lifecycle
All (41)Filed (5)Permit Issued (6)Signed Off (2)Inspection (8)Special Inspection (20)
07/27/2026
Filed — Alteration CO
Partial interior renovation on basement, 1st and 2nd floor, current configuration to be reflected on CO, additional window openings and new deck on 1st floor
B00992112-P3
04/29/2026
Special inspection requirement — Interior lighting power
MARK HELDER
04/29/2026
Special inspection requirement — HVAC-R and service water heating system controls
MARK HELDER
04/29/2026
Special inspection requirement — Fenestration areas
MARK HELDER
04/29/2026
Special inspection requirement — Concrete - Cast-In-Place
MARK HELDER
04/29/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
MARK HELDER
04/29/2026
Special inspection requirement — Mechanical Systems
MARK HELDER
04/29/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
MARK HELDER
04/29/2026
Special inspection requirement — Structural Steel - Details
MARK HELDER
04/29/2026
Special inspection requirement — Subgrade Inspections
MARK HELDER
04/29/2026
Special inspection requirement — Subsurface Investigations (Borings/Test Pits)
MARK HELDER
04/29/2026
Special inspection requirement — Construction Utilizing CLT or SCL, Type IV
04/29/2026
Special inspection requirement — Final
MARK HELDER
04/29/2026
Special inspection requirement — Fire-Resistance Rated Construction
MARK HELDER
04/29/2026
Special inspection requirement — Footing and Foundation
MARK HELDER
04/29/2026
Special inspection requirement — Fenestration air leakage
MARK HELDER
04/29/2026
Special inspection requirement — Fenestration and door U-factor and product ratings
MARK HELDER
04/29/2026
Special inspection requirement — HVAC-R and service water piping design and insulation
MARK HELDER
04/29/2026
Special inspection requirement — HVAC-R and service water heating equipment
MARK HELDER
03/05/2026
Inspection — Pass-Final CND-Occupancy Inspection
Pass
View inspection ↗
01/29/2026
Inspection — Fail-Final CND-Occupancy Inspection
Fail
View inspection ↗
05/02/2025
Permit issued — Structural
B00992112-I1-MS
01/21/2025
Signed off — Alteration CO
Partial interior renovation on basement, 1st and 2nd floor, current configuration to be reflected on CO, additional window openings and new deck on 1st floor
B00992112-S4
11/14/2024
Signed off — Alteration CO
Partial interior renovation on basement, 1st and 2nd floor, current configuration to be reflected on CO, additional window openings and new deck on 1st floor
B00992112-S1
11/04/2024
Inspection — Pass-Final PL - Up to 3 Requested Floors
Pass
View inspection ↗
09/13/2024
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Roughing
Certified
View inspection ↗
08/30/2024
Filed — Alteration CO
Partial interior renovation on basement, 1st and 2nd floor, current configuration to be reflected on CO, additional window openings and new deck on 1st floor
B00992112-P2
08/30/2024
Inspection — Certified Water and Sanitary-WS-Fixtures-Finish
Certified
View inspection ↗
08/29/2024
Inspection — Pass-Final PL - Up to 3 Requested Floors
Pass
View inspection ↗
08/15/2024
Permit issued — Mechanical Systems
B00992112-I1-FO
07/30/2024
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Roughing
Certified
View inspection ↗
07/26/2024
Inspection — Certified Remove/Cap - work done in accordance with code
Certified
View inspection ↗
07/17/2024
Permit issued — Foundation
B00992112-I1-ST
07/15/2024
Permit issued — Mechanical Systems
B00992112-S4-MS
07/05/2024
Filed — Alteration CO
Partial interior renovation on basement, 1st and 2nd floor, current configuration to be reflected on CO, additional window openings and new deck on 1st floor
B00992112-S4
07/03/2024
Permit issued — Mechanical Systems
B00992112-I1-GC
07/03/2024
Special inspection requirement — Mechanical Systems
MARK HELDER
07/03/2024
Special inspection requirement — Final
MARK HELDER
05/17/2024
Permit issued — Plumbing
B00992112-S1-PL
04/30/2024
Filed — Alteration CO
Partial interior renovation on basement, 1st and 2nd floor, current configuration to be reflected on CO, additional window openings and new deck on 1st floor
B00992112-S1
04/09/2024
Filed — Alteration CO
Partial interior renovation on basement, 1st and 2nd floor, current configuration to be reflected on CO, additional window openings and new deck on 1st floor
B00992112-I1
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWStructuralPermit IssuedEFL SERVICES INC05/02/2025
DOB NOWMechanical SystemsPermit IssuedEFL SERVICES INC08/15/2024
DOB NOWFoundationPermit IssuedEFL SERVICES INC07/17/2024
DOB NOWMechanical SystemsSigned-offEFL SERVICES INC07/15/2024
DOB NOWMechanical SystemsPermit IssuedEFL SERVICES INC07/03/2024
DOB NOWPlumbingSigned-offGREGG NY PLUMBING, INC05/17/2024
1 project · most recent 07/27/2026
Air Conditioning Systems Ventilation Systems
FiledStatusContractorScopeMake / Model / Capacity
07/27/2026Permit IssuedEFL SERVICES INCAir Conditioning Systems, Ventilation Systems
Cooling
Fujitsu 18RGLX 18,000 BTU · Split System ×4
24RGLX 24,000 BTU · Split System ×4
24RLXFZ 24,000 BTU · Split System ×4
Ventilation
Panasonic Whispergreen FV-0511VK2 50 CFM · Exhaust Fan ×12
1 project · most recent 07/27/2026
Gas Water/Sanitary
FiledStatusContractorScope
07/27/2026Signed-offGREGG NY PLUMBING, INCGas, Water/Sanitary
1 project · most recent 01/16/2024
General Wiring
FiledStatusContractorScope
01/16/2024Permit IssuedISTRA ELEC'L CONTRS CORPGeneral Wiring
1 project · most recent 07/27/2026
Steel Concrete Wood
FiledStatusContractorScope
07/27/2026Permit IssuedEFL SERVICES INCSteel, Concrete, Wood
▾Field Inspections (DOB CAP) — 8
DateTypeResultReport
03/05/2026Pass-Final CND-Occupancy InspectionPassView ↗
01/29/2026Fail-Final CND-Occupancy InspectionFailView ↗
11/04/2024Pass-Final PL - Up to 3 Requested FloorsPassView ↗
09/13/2024Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
08/30/2024Certified Water and Sanitary-WS-Fixtures-FinishCertifiedView ↗
08/29/2024Pass-Final PL - Up to 3 Requested FloorsPassView ↗
07/30/2024Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
07/26/2024Certified Remove/Cap - work done in accordance with codeCertifiedView ↗
▾Special Inspection Requirements (DOB NOW) — 20
DateRequirementInspectorRole
04/29/2026Interior lighting powerMARK HELDERenergy_progress
04/29/2026HVAC-R and service water heating system controlsMARK HELDERenergy_progress
04/29/2026Fenestration areasMARK HELDERenergy_progress
04/29/2026Concrete - Cast-In-PlaceMARK HELDERspecial
04/29/2026Fire-Resistant Penetrations and JointsMARK HELDERspecial
04/29/2026Mechanical SystemsMARK HELDERspecial
04/29/2026Structural Stability – Alterations of existing buildingsMARK HELDERspecial
04/29/2026Structural Steel - DetailsMARK HELDERspecial
04/29/2026Subgrade InspectionsMARK HELDERspecial
04/29/2026Subsurface Investigations (Borings/Test Pits)MARK HELDERspecial
04/29/2026Construction Utilizing CLT or SCL, Type IV—special
04/29/2026FinalMARK HELDERprogress
04/29/2026Fire-Resistance Rated ConstructionMARK HELDERprogress
04/29/2026Footing and FoundationMARK HELDERprogress
04/29/2026Fenestration air leakageMARK HELDERenergy_progress
04/29/2026Fenestration and door U-factor and product ratingsMARK HELDERenergy_progress
04/29/2026HVAC-R and service water piping design and insulationMARK HELDERenergy_progress
04/29/2026HVAC-R and service water heating equipmentMARK HELDERenergy_progress
07/03/2024Mechanical SystemsMARK HELDERspecial
07/03/2024FinalMARK HELDERprogress
▾Documents — 31 on file (BIS + DOB NOW)
▸Plans & Drawings5
▸DOB NOWPlans/Sketch5
08/24/2026B00992112-S4Request digital key ↗
08/24/2026B00992112-S1Request digital key ↗
08/24/2026B00992112-I1Request digital key ↗
Showing 3 of 5 on file for this type
▸Seals & Professional Certifications13
▸DOB NOWDPL-1: Design Professional Seal & Signature5
08/24/2026B00992112-P2Open ↗
08/24/2026B00992112-S4Open ↗
08/24/2026B00992112-S1Open ↗
Showing 3 of 5 on file for this type
▸DOB NOWProgress Inspector Seal & Signature4
08/25/2026B00992112-P3Open ↗
08/25/2026B00992112-P3Open ↗
08/25/2026B00992112-P3Open ↗
Showing 3 of 4 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature4
08/25/2026B00992112-P3Open ↗
08/25/2026B00992112-P3Open ↗
08/25/2026B00992112-P3Open ↗
Showing 3 of 4 on file for this type
▸Safety & Tenant Protection2
▸DOB NOWStreet Tree Checklist2
08/24/2026B00992112-P3Open ↗
08/24/2026B00992112-I1Open ↗
▸Environmental & Asbestos5
▸DOB NOWDEP ACP-5: Asbestos Assessment Report5
08/24/2026B00992112-P2Open ↗
08/24/2026B00992112-S4Open ↗
08/24/2026B00992112-S1Open ↗
Showing 3 of 5 on file for this type
▸Inspections & Test Reports3
▸DOB NOWSOIL REPORT2
08/24/2026B00992112-P3Open ↗
08/13/2026B00992112-I1Open ↗
▸DOB NOWTR4 Test Report and Plot Diagram1
08/13/2026B00992112-I1Open ↗
▸Other Documents3
▸DOB NOWProperty Ownership Certification2
08/24/2026B00992112-I1Open ↗
08/24/2026B00992112-P3Open ↗
▸DOB NOWFinal Survey1
08/13/2026B00992112-I1Open ↗