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Three families
399 SACKETT STREET
BROOKLYN · BIN 3006918
💬 Discuss this project
1899Year Built
3Stories
C0Building Class
R6BZoning
3,400 sfGross Floor Area
3Units
Rent Stabilized8 Open Violations ▸FDNY Report ↗
Three families · Owner of record: 399 SACKETT 123 LLC · 2,000 sf lot · 1.7 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralPlumbingFire ProtectionCivil
Permit Issued — active, not yet Signed-off
RoofUnder Construction2p · 1 filing · 20 docs
Floor 3Under Construction2p · 1 filing · 20 docs
Floor 2Under Construction2p · 1 filing · 20 docs
Floor 1Under Construction2p · 1 filing · 20 docs
CellarUnder Construction6p · 1 filing · 20 docs
BasementUnder Construction2p · 1 filing · 20 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
399 SACKETT 123 LLC103/22/2026
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
05/12/2025$3.0M—Private party → 399 SACKETT 123 LLC$884/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
D&E BUILD EVERGREEN INC.608/03/2026
PETER CHO ARCHITECTS, PLLC112/09/2025
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
METRO DESIGN CONSULTANTS INC1003/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
CAVALRY GC&P LLCGeneral Contractor308/05/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
NKM ENGINEERING PLLC6244508/03/2026
Building Lifecycle
All (94)Filed (7)Permit Issued (3)Violation (18)Objection (36)Special Inspection (30)
08/10/2026
Objection raised — Scope
08/10/2026
Objection raised — Scope
08/04/2026
Permit issued — Earth Work
B01315541-I1-GC
08/03/2026
Filed — Alteration CO
HORIZINTAL ENLARGEMENT OF AN EXIST. 3-STORY 3-FAMILY BUILDING WITH BASEMENT AND CELLAR, CONVERSION FROM 3-FAMILY DWELLING TO A ONE-FAMILY DWELLING AS SHOWN IN PLANS. INSTALL A METAL DECK AT REAR. OBTAIN A NEW CofO.
B01315541-P2
06/25/2026
Violation issued (DOB, open)
V-DOB VIOLATION - ACTIVE
06/25/2026
Violation issued (ECB, open)
Construction
05/19/2026
Permit issued — Foundation
B01315541-I1-GC
05/18/2026
Permit issued — Construction Fence
B01315541-S1-FN
05/18/2026
Special inspection requirement — HVAC-R and service water heating equipment
NARESH MAHANGU
05/18/2026
Special inspection requirement — HVAC-R and service water heating system controls
NARESH MAHANGU
05/18/2026
Special inspection requirement — HVAC-R and service water piping design and insulation
NARESH MAHANGU
05/18/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
NARESH MAHANGU
05/18/2026
Special inspection requirement — Energy Code Compliance Inspections
NARESH MAHANGU
05/18/2026
Special inspection requirement — Maintenance information
NARESH MAHANGU
05/05/2026
Violation issued (HPD, open)
A
04/22/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
NARESH MAHANGU
04/22/2026
Special inspection requirement — Maintenance information
NARESH MAHANGU
04/22/2026
Special inspection requirement — HVAC-R and service water heating system controls
NARESH MAHANGU
04/22/2026
Special inspection requirement — HVAC-R and service water piping design and insulation
NARESH MAHANGU
04/22/2026
Special inspection requirement — HVAC-R and service water heating equipment
NARESH MAHANGU
04/22/2026
Special inspection requirement — Energy Code Compliance Inspections
NARESH MAHANGU
04/21/2026
Objection resolved — Addressed
04/14/2026
Filed — Alteration CO
HORIZINTAL ENLARGEMENT OF AN EXIST. 3-STORY 3-FAMILY BUILDING WITH BASEMENT AND CELLAR, CONVERSION FROM 3-FAMILY DWELLING TO A ONE-FAMILY DWELLING AS SHOWN IN PLANS. INSTALL A METAL DECK AT REAR. OBTAIN A NEW CofO.
B01315541-P1
04/14/2026
Objection resolved — Addressed
04/10/2026
Special inspection requirement — HVAC-R and service water heating system controls
04/10/2026
Special inspection requirement — Maintenance information
04/10/2026
Special inspection requirement — HVAC-R and service water heating equipment
04/10/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
04/10/2026
Special inspection requirement — Energy Code Compliance Inspections
04/10/2026
Special inspection requirement — HVAC-R and service water piping design and insulation
03/13/2026
Objection raised — Inspections
03/13/2026
Objection resolved — Addressed
03/12/2026
Objection resolved — Addressed
03/12/2026
Objection resolved — Addressed
03/12/2026
Objection resolved — Addressed
03/05/2026
Filed — Alteration CO
HORIZINTAL ENLARGEMENT OF AN EXIST. 3-STORY 3-FAMILY BUILDING WITH BASEMENT AND CELLAR, CONVERSION FROM 3-FAMILY DWELLING TO A ONE-FAMILY DWELLING AS SHOWN IN PLANS. INSTALL A METAL DECK AT REAR. OBTAIN A NEW CofO.
B01315541-S4
02/27/2026
Objection resolved — Addressed
02/06/2026
Objection resolved — Addressed
02/06/2026
Objection resolved — Addressed
02/06/2026
Objection resolved — Addressed
02/06/2026
Objection resolved — Addressed
02/06/2026
Objection resolved — Addressed
02/06/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
NARESH MAHANGU
12/26/2025
Objection raised — Scope
12/26/2025
Objection raised — Other
12/19/2025
Objection raised — Inspections
12/19/2025
Objection raised — Scope
12/19/2025
Objection raised — Zoning
12/19/2025
Objection raised — Admin
12/17/2025
Filed — Alteration CO
HORIZINTAL ENLARGEMENT OF AN EXIST. 3-STORY 3-FAMILY BUILDING WITH BASEMENT AND CELLAR, CONVERSION FROM 3-FAMILY DWELLING TO A ONE-FAMILY DWELLING AS SHOWN IN PLANS. INSTALL A METAL DECK AT REAR. OBTAIN A NEW CofO.
B01315541-S2
12/17/2025
Objection resolved — Addressed
12/10/2025
Filed — Alteration CO
HORIZINTAL ENLARGEMENT OF AN EXIST. 3-STORY 3-FAMILY BUILDING WITH BASEMENT AND CELLAR, CONVERSION FROM 3-FAMILY DWELLING TO A ONE-FAMILY DWELLING AS SHOWN IN PLANS. INSTALL A METAL DECK AT REAR. OBTAIN A NEW CofO.
B01315541-S3
12/09/2025
Filed — Alteration CO
HORIZINTAL ENLARGEMENT OF AN EXIST. 3-STORY 3-FAMILY BUILDING WITH BASEMENT AND CELLAR, CONVERSION FROM 3-FAMILY DWELLING TO A ONE-FAMILY DWELLING AS SHOWN IN PLANS. INSTALL A METAL DECK AT REAR. OBTAIN A NEW CofO.
B01315541-S1
12/05/2025
Objection resolved — Addressed
12/05/2025
Objection resolved — Addressed
12/05/2025
Objection resolved — Addressed
12/05/2025
Objection resolved — Addressed
11/23/2025
Special inspection requirement — Maintenance information
NARESH MAHANGU
11/23/2025
Special inspection requirement — Energy Code Compliance Inspections
NARESH MAHANGU
11/23/2025
Special inspection requirement — Duct leakage testing, insulation and design
NARESH MAHANGU
Latest 60 of 94 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWEarth WorkPermit IssuedCAVALRY GC&P LLC08/04/2026
DOB NOWFoundationPermit IssuedCAVALRY GC&P LLC05/19/2026
DOB NOWConstruction FencePermit IssuedCAVALRY GC&P LLC05/18/2026
BISPLISSUEDNEW YORK STANDARD MECH CORP01/27/2005
BISOTISSUEDJVC INC01/24/2005
1 job · most recent 08/03/2026
Air Conditioning Systems Heating Systems Ventilation Systems
FiledStatusContractorScopeMake / Model / Capacity
08/03/2026Permit IssuedCAVALRY GC&P LLCAir Conditioning Systems, Heating Systems, Ventilation Systems
Cooling
Cooper & Hunter CH-N48LCU-230VO 48,000 BTU · Condensing Unit ×1
CH-N60LCU-230VO 60,000 BTU · Condensing Unit ×1
Heating
Cooper & Hunter CH-48AHU 48,000 BTU · Ahu ×1
CH-60AHU 60,000 BTU · Ahu ×1
Ventilation
Hampton Bay 7114-01 50 CFM · Exhaust Fan ×5
Janska RHW-3652 520 CFM · Kitchen Exhaust ×1
1 job · most recent 08/03/2026
Sprinkler System
FiledStatusContractorScope
08/03/2026——Sprinkler System
1 job · most recent 08/03/2026
Gas Water/Sanitary
FiledStatusContractorScope
08/03/2026——Gas, Water/Sanitary
1 job · most recent 08/03/2026
Steel
FiledStatusContractorScope
08/03/2026Permit IssuedCAVALRY GC&P LLCSteel
1 job · most recent 08/03/2026
Fence
FiledStatusContractorScope
08/03/2026Permit IssuedCAVALRY GC&P LLCFence
▾Special Inspection Requirements (DOB NOW) — 50
DateRequirementInspectorRole
05/18/2026HVAC-R and service water heating equipmentNARESH MAHANGUenergy_progress
05/18/2026HVAC-R and service water heating system controlsNARESH MAHANGUenergy_progress
05/18/2026HVAC-R and service water piping design and insulationNARESH MAHANGUenergy_progress
05/18/2026Fire-Resistant Penetrations and JointsNARESH MAHANGUspecial
05/18/2026Energy Code Compliance InspectionsNARESH MAHANGUprogress
05/18/2026Maintenance informationNARESH MAHANGUenergy_progress
04/22/2026Fire-Resistant Penetrations and JointsNARESH MAHANGUspecial
04/22/2026Maintenance informationNARESH MAHANGUenergy_progress
04/22/2026HVAC-R and service water heating system controlsNARESH MAHANGUenergy_progress
04/22/2026HVAC-R and service water piping design and insulationNARESH MAHANGUenergy_progress
04/22/2026HVAC-R and service water heating equipmentNARESH MAHANGUenergy_progress
04/22/2026Energy Code Compliance InspectionsNARESH MAHANGUprogress
04/10/2026HVAC-R and service water heating system controls—energy_progress
04/10/2026Maintenance information—energy_progress
04/10/2026HVAC-R and service water heating equipment—energy_progress
04/10/2026Fire-Resistant Penetrations and Joints—special
04/10/2026Energy Code Compliance Inspections—progress
04/10/2026HVAC-R and service water piping design and insulation—energy_progress
02/06/2026Structural Stability – Alterations of existing buildingsNARESH MAHANGUspecial
11/23/2025Maintenance informationNARESH MAHANGUenergy_progress
11/23/2025Energy Code Compliance InspectionsNARESH MAHANGUprogress
11/23/2025Duct leakage testing, insulation and designNARESH MAHANGUenergy_progress
11/18/2025Maintenance informationNARESH MAHANGUenergy_progress
11/10/2025HVAC-R and service water piping design and insulationNARESH MAHANGUenergy_progress
11/10/2025HVAC-R and service water heating equipmentNARESH MAHANGUenergy_progress
Latest 25 of 50.
▾Documents — 63 on file (BIS + DOB NOW)
▸Plans & Drawings8
▸DOB NOWPlans/Sketch8
08/17/2026B01315541-P3Request digital key ↗
08/17/2026B01315541-P1Request digital key ↗
08/17/2026B01315541-S1Request digital key ↗
Showing 3 of 8 on file for this type
▸Applications & Permits2
▸BISPLAN / WORK APPROVAL APPLICATION2
06/11/2020322085523Open ↗
05/22/2020322085523Open ↗
▸Zoning, Tax Lot & Property Records2
▸DOB NOWZD1: DOB Zoning Diagram2
08/17/2026B01315541-P3Open ↗
08/15/2026B01315541-I1Open ↗
▸Seals & Professional Certifications23
▸DOB NOWProgress Inspector Seal & Signature10
09/01/2026B01315541-I1Open ↗
09/01/2026B01315541-I1Open ↗
09/01/2026B01315541-I1Open ↗
Showing 3 of 10 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature8
08/17/2026B01315541-S2Open ↗
08/17/2026B01315541-P2Open ↗
08/17/2026B01315541-P1Open ↗
Showing 3 of 8 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature5
09/01/2026B01315541-I1Open ↗
09/01/2026B01315541-I1Open ↗
08/28/2026B01315541-S3Open ↗
Showing 3 of 5 on file for this type
▸Safety & Tenant Protection2
▸DOB NOWStreet Tree Checklist2
08/17/2026B01315541-P3Open ↗
08/15/2026B01315541-I1Open ↗
▸Environmental & Asbestos7
▸DOB NOWDEP ACP-5: Asbestos Assessment Report7
08/17/2026B01315541-P3Open ↗
08/17/2026B01315541-P1Open ↗
08/15/2026B01315541-I1Open ↗
Showing 3 of 7 on file for this type
▸Inspections & Test Reports3
▸DOB NOWSOIL REPORT2
08/17/2026B01315541-P3Open ↗
08/15/2026B01315541-I1Open ↗
▸DOB NOWTR4 Test Report and Plot Diagram1
08/15/2026B01315541-I1Open ↗
▸Approvals, Objections & Sign-offs3
▸BISLETTERS - SUPPORTING DOCUMENTATION3
12/02/2020322085523Open ↗
12/02/2020322085523Open ↗
05/28/2020322085523Open ↗
▸Filing & Intake Forms3
▸BISADDITIONAL INFORMATION2
12/02/2020322085523Open ↗
12/02/2020322085523Open ↗
▸BISEFILING COVER SHEET1
05/08/2020322085523Open ↗
▸Other Documents10
▸DOB NOWSite Survey: Initial2
08/17/2026B01315541-P3Open ↗
08/15/2026B01315541-I1Open ↗
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone2
08/17/2026B01315541-P3Open ↗
08/15/2026B01315541-I1Open ↗
▸DOB NOWPlot Diagram2
08/17/2026B01315541-P3Open ↗
08/15/2026B01315541-I1Open ↗
▸DOB NOWProperty Ownership Certification2
08/17/2026B01315541-P3Open ↗
08/15/2026B01315541-I1Open ↗
▸BISPLOT DIAGRAM1
12/02/2020322085523Open ↗
▸DOB NOWAdjoining Owners Notification1
08/15/2026B01315541-I1Open ↗