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BuildNYC
Three families
772 51ST STREET
BROOKLYN · BIN 3013760
💬 Discuss this project
1930Year Built
2Stories
C0Building Class
R6BZoning
2,424 sfGross Floor Area
3Units
Rent Stabilized7 Active Violations ▸FDNY Report ↗
Three families · 2,003 sf lot · 1.21 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralPlumbingCivilGeneral
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 Construction1p · 1 filing · 20 docs
BulkheadUnder Construction1p · 1 filing · 20 docs
Floor 4Under Construction1 filing · 20 docs
Floor 3
Floor 2Under Construction2p · 1 filing · 20 docs
Floor 1Under Construction1 filing · 20 docs
CellarUnder Construction21p · 2 filings · 20 docs
Site & exteriorTemporary construction fence installationUnder Construction1p · 1 filing · 2 docs
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
04/04/2022$1.6M—Private party → Private party$660/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
NY Building Associates810/14/2026
Chun Feng, Architect104/15/2025
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
High Quality 3381003/21/2026
Highquality Construction VNW203/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
John Evan ContractingGeneral Contractor310/01/2026
High Quality ConstructionScaffold104/09/2026
Mercury Building AssociatesScaffold110/02/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
NKM Engineering6244810/14/2026
Building Lifecycle
All (109)Filed (9)Permit Issued (5)Violation (11)Objection (54)Special Inspection (30)
10/14/2026
Filed — ALT-CO - New Building with Existing Elements to Remain
PROPOSED UNDERPINNING FOUNDATION WORK AS PER PLAN FILED IN CONJUNCTION WITH DOB JOB #B01099647-i1 AND FILED WITH SUPPORT OF EXCAVATION JOB #B01232444 .
B01099647-P2
10/07/2026
Special inspection requirement — Concrete - Cast-In-Place
NARESH MAHANGU
10/07/2026
Special inspection requirement — Insulation placement and R values
NARESH MAHANGU
10/07/2026
Special inspection requirement — Air barrier - visual inspection
NARESH MAHANGU
10/07/2026
Special inspection requirement — Fenestration areas
NARESH MAHANGU
10/07/2026
Special inspection requirement — Protection of exposed foundation insulation
NARESH MAHANGU
10/07/2026
Special inspection requirement — Fenestration and door U-factor and product ratings
NARESH MAHANGU
10/07/2026
Special inspection requirement — Fenestration air leakage
NARESH MAHANGU
10/07/2026
Special inspection requirement — Footing and Foundation
NARESH MAHANGU
10/07/2026
Special inspection requirement — Final
Lester Katz
10/07/2026
Special inspection requirement — Subgrade Inspections
NARESH MAHANGU
10/07/2026
Special inspection requirement — Structural Steel - Welding
NARESH MAHANGU
10/07/2026
Special inspection requirement — Structural Steel - High Strength Bolting
NARESH MAHANGU
10/07/2026
Special inspection requirement — Structural Steel - Details
NARESH MAHANGU
10/07/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
NARESH MAHANGU
10/07/2026
Special inspection requirement — Structural Cold-Formed Steel
NARESH MAHANGU
10/07/2026
Special inspection requirement — Masonry
NARESH MAHANGU
10/07/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
NARESH MAHANGU
10/07/2026
Special inspection requirement — Excavations - Sheeting, Shoring, and Bracing
NARESH MAHANGU
10/06/2026
Objection resolved — Resolved
10/06/2026
Objection resolved — Resolved
10/02/2026
Objection raised — Other
10/02/2026
Objection raised — Other
10/02/2026
Objection raised — Other
10/01/2026
Permit issued — Construction Fence
B01211034-I1-FN
09/30/2026
Permit issued — Support of Excavation
B01232444-I1-SE
09/18/2026
Permit issued — Earth Work
B01099647-S1-GC-CX
09/16/2026
Filed — ALT-CO - New Building with Existing Elements to Remain
PROPOSED UNDERPINNING FOUNDATION WORK AS PER PLAN FILED IN CONJUNCTION WITH DOB JOB #B01099647-i1 AND FILED WITH SUPPORT OF EXCAVATION JOB #B01232444 .
B01099647-P1
09/16/2026
Special inspection requirement — Fenestration air leakage
NARESH MAHANGU
09/16/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
NARESH MAHANGU
09/16/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
NARESH MAHANGU
09/16/2026
Special inspection requirement — Energy Code Compliance Inspections
NARESH MAHANGU
09/16/2026
Special inspection requirement — Fire-Resistance Rated Construction
NARESH MAHANGU
09/16/2026
Special inspection requirement — Lowest Floor Elevation
NARESH MAHANGU
09/16/2026
Special inspection requirement — Air barrier - visual inspection
NARESH MAHANGU
09/16/2026
Special inspection requirement — Metering
NARESH MAHANGU
09/16/2026
Special inspection requirement — Fenestration and door U-factor and product ratings
NARESH MAHANGU
09/16/2026
Special inspection requirement — Lighting controls
NARESH MAHANGU
09/16/2026
Special inspection requirement — Protection of exposed foundation insulation
NARESH MAHANGU
09/16/2026
Special inspection requirement — Fenestration areas
NARESH MAHANGU
08/26/2026
Permit issued — Foundation
B01099647-S2-FO
05/01/2026
Violation issued (HPD, open)
A
04/20/2026
Objection raised — Energy
04/13/2026
Objection resolved — Resolved
04/09/2026
Objection resolved — Addressed
04/09/2026
Objection resolved — Addressed
04/08/2026
Objection raised — Admin
03/30/2026
Filed — ALT-CO - New Building with Existing Elements to Remain
PROPOSED UNDERPINNING FOUNDATION WORK AS PER PLAN FILED IN CONJUNCTION WITH DOB JOB #B01099647-i1 AND FILED WITH SUPPORT OF EXCAVATION JOB #B01232444 .
B01099647-S2
03/30/2026
Objection resolved — Addressed
03/06/2026
Objection resolved — Addressed
03/05/2026
Objection resolved — Addressed
03/05/2026
Objection resolved — Addressed
02/26/2026
Objection raised — Structural
02/16/2026
Objection resolved — Addressed
12/18/2025
Objection resolved — Addressed
12/18/2025
Objection resolved — Addressed
12/18/2025
Objection resolved — Addressed
11/19/2025
Violation issued (HPD, open)
I
11/11/2025
Objection resolved — Addressed
11/10/2025
Objection resolved — Addressed
Latest 60 of 109 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWConstruction FencePermit IssuedMercury Building Associates10/01/2026
DOB NOWSupport of ExcavationPermit IssuedJohn Evan Contracting09/30/2026
DOB NOWEarth WorkPermit IssuedJohn Evan Contracting09/18/2026
DOB NOWFoundationPermit IssuedJohn Evan Contracting08/26/2026
DOB NOWConstruction FencePermit IssuedHigh Quality Construction04/17/2025
2 projects · most recent 10/14/2026
Steel Concrete Masonry
FiledStatusContractorScope
10/14/2026Permit IssuedJohn Evan ContractingSteel, Concrete, Masonry
06/05/2025——Steel, Concrete, Masonry
1 project · most recent 04/15/2025
Fence
FiledStatusContractorScope
04/15/2025Permit IssuedMercury Building AssociatesFence
▾Special Inspection Requirements (DOB NOW) — 57
DateRequirementInspectorRole
10/07/2026Concrete - Cast-In-PlaceNARESH MAHANGUspecial
10/07/2026Insulation placement and R valuesNARESH MAHANGUenergy_progress
10/07/2026Air barrier - visual inspectionNARESH MAHANGUenergy_progress
10/07/2026Fenestration areasNARESH MAHANGUenergy_progress
10/07/2026Protection of exposed foundation insulationNARESH MAHANGUenergy_progress
10/07/2026Fenestration and door U-factor and product ratingsNARESH MAHANGUenergy_progress
10/07/2026Fenestration air leakageNARESH MAHANGUenergy_progress
10/07/2026Footing and FoundationNARESH MAHANGUprogress
10/07/2026FinalLester Katzprogress
10/07/2026Subgrade InspectionsNARESH MAHANGUspecial
10/07/2026Structural Steel - WeldingNARESH MAHANGUspecial
10/07/2026Structural Steel - High Strength BoltingNARESH MAHANGUspecial
10/07/2026Structural Steel - DetailsNARESH MAHANGUspecial
10/07/2026Structural Stability – Alterations of existing buildingsNARESH MAHANGUspecial
10/07/2026Structural Cold-Formed SteelNARESH MAHANGUspecial
10/07/2026MasonryNARESH MAHANGUspecial
10/07/2026Fire-Resistant Penetrations and JointsNARESH MAHANGUspecial
10/07/2026Excavations - Sheeting, Shoring, and BracingNARESH MAHANGUspecial
09/16/2026Fenestration air leakageNARESH MAHANGUenergy_progress
09/16/2026Fire-Resistant Penetrations and JointsNARESH MAHANGUspecial
09/16/2026Structural Stability – Alterations of existing buildingsNARESH MAHANGUspecial
09/16/2026Energy Code Compliance InspectionsNARESH MAHANGUprogress
09/16/2026Fire-Resistance Rated ConstructionNARESH MAHANGUprogress
09/16/2026Lowest Floor ElevationNARESH MAHANGUprogress
09/16/2026Air barrier - visual inspectionNARESH MAHANGUenergy_progress
Latest 25 of 57.
▾Documents — 65 on file (BIS + DOB NOW)
▸Plans & Drawings7
▸DOB NOWPlans/Sketch7
08/21/2026B01211034-I1Request digital key ↗
08/21/2026B01232085-S1Request digital key ↗
08/21/2026B01232444-I1Request digital key ↗
Showing 3 of 7 on file for this type
▸Zoning, Tax Lot & Property Records3
▸DOB NOWHouse Number Verification: TOPO Stamp1
08/13/2026B01099647-I1Open ↗
▸DOB NOWZoning Exhibit form (1-5)1
08/13/2026B01099647-I1Open ↗
▸DOB NOWZD1: DOB Zoning Diagram1
08/13/2026B01099647-I1Open ↗
▸Seals & Professional Certifications34
▸DOB NOWSpecial Inspector Seal & Signature17
10/16/2026B01099647-P2Open ↗
10/16/2026B01099647-P2Open ↗
10/16/2026B01099647-P2Open ↗
Showing 3 of 17 on file for this type
▸DOB NOWProgress Inspector Seal & Signature9
10/16/2026B01099647-P2Open ↗
10/16/2026B01099647-P2Open ↗
10/16/2026B01099647-P2Open ↗
Showing 3 of 9 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature8
10/16/2026B01099647-P2Open ↗
08/21/2026B01211034-I1Open ↗
08/21/2026B01232085-I1Open ↗
Showing 3 of 8 on file for this type
▸Trade Schedules & Equipment3
▸DOB NOWDEP: Sewer Certification (Sanitary/Storm)3
10/16/2026B01099647-P2Open ↗
08/13/2026B01099647-S1Open ↗
08/13/2026B01099647-I1Open ↗
▸Safety & Tenant Protection3
▸DOB NOWParks Department Acknowledgment Letter for Street Trees Plan2
08/20/2026B01099647-S1Open ↗
08/13/2026B01099647-I1Open ↗
▸DOB NOWStreet Trees Site Plan1
08/13/2026B01099647-I1Open ↗
▸Environmental & Asbestos7
▸DOB NOWDEP ACP-5: Asbestos Assessment Report7
10/16/2026B01099647-P2Open ↗
08/21/2026B01232085-S1Open ↗
08/21/2026B01232444-I1Open ↗
Showing 3 of 7 on file for this type
▸Other Documents8
▸DOB NOWSite Survey: Initial3
10/16/2026B01099647-P2Open ↗
08/13/2026B01099647-S1Open ↗
08/13/2026B01099647-I1Open ↗
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone3
10/16/2026B01099647-P2Open ↗
08/13/2026B01099647-I1Open ↗
08/13/2026B01099647-S1Open ↗
▸DOB NOWProperty Ownership Certification1
08/20/2026B01099647-I1Open ↗
▸DOB NOWAdjoining Owners Notification1
08/21/2026B01232444-I1Open ↗