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Two family converted from one family
321 21 STREET
BROOKLYN · BIN 3017477
💬 Discuss this project
1905Year Built
2Stories
B3Building Class
R6BZoning
1,564 sfGross Floor Area
2Units
2 Open Violations 1 unresolved · 1 paperwork only ▸FDNY Report ↗
Two family converted from one family · Owner of record: KINGS COUNTY ORGANIZATION LLC · 1,603 sf lot · 0.98 FAR built · Flood zone X
Locations of Work
ArchitectureStructuralMechanicalPlumbing
Roof3p · 1 filing · 17 docs
Bulkhead3p · 1 filing · 17 docs
Floor 42p · 1 filing · 17 docs
Floor 32p · 1 filing · 17 docs
Floor 2
Floor 11p · 1 filing · 17 docs
Cellar3p · 1 filing · 17 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
LT PRO CONSTRUCTION309/13/2026
MNK ENTERPRISES203/21/2026
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
11/20/2015$250K—— → —$160/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
HSU & ASSOCIATES508/25/2026
IVAN SHCHERBAKOV207/15/2026
GREEN DESIGN110/09/2020
Building Lifecycle
All (93)Filed (8)Violation (3)Objection (52)Special Inspection (30)
09/16/2026
Objection raised — Other
09/01/2026
Special inspection requirement — Duct leakage testing, insulation and design
08/25/2026
Filed — Full Demolition
full demolition of existing 2-story frame residential building, existing party wall will remain in place.
B01438083-I1
08/18/2026
Objection raised — Structural
08/18/2026
Objection raised — Admin
08/18/2026
Objection raised — Structural
08/18/2026
Objection raised — Fire_Protection
08/18/2026
Objection raised — Scope
08/18/2026
Objection raised — Inspections
08/18/2026
Objection raised — Other
08/18/2026
Objection raised — Admin
08/18/2026
Objection raised — Other
08/18/2026
Objection raised — Inspections
08/18/2026
Objection raised — Admin
08/18/2026
Objection raised — Admin
08/17/2026
Objection raised — Other
08/17/2026
Objection raised — Other
08/17/2026
Objection raised — Other
08/17/2026
Objection resolved — Resolved
08/03/2026
Filed — New Building
Proposed 7-family 4-story with cellar residential building.
B01418533-S4
08/03/2026
Filed — New Building
Proposed 7-family 4-story with cellar residential building.
B01418533-S5
08/03/2026
Objection raised — Energy
07/31/2026
Objection resolved — Addressed
07/30/2026
Objection resolved — Addressed
07/30/2026
Objection resolved — Resolved
07/30/2026
Objection resolved — Addressed
07/29/2026
Objection resolved — Addressed
07/29/2026
Objection resolved — Addressed
07/29/2026
Objection resolved — Addressed
07/29/2026
Objection resolved — Addressed
07/29/2026
Objection resolved — Addressed
07/29/2026
Objection resolved — Open
07/29/2026
Objection resolved — Addressed
07/29/2026
Objection resolved — Open
07/29/2026
Special inspection requirement — Structural Stability – Alterations of existing Buildings
07/29/2026
Special inspection requirement — Lighting controls
07/29/2026
Special inspection requirement — Structural Stability – Alterations of existing buildings
07/29/2026
Special inspection requirement — Demolition
07/28/2026
Objection resolved — Addressed
07/28/2026
Objection resolved — Addressed
07/28/2026
Objection resolved — Addressed
07/28/2026
Objection resolved — Addressed
07/28/2026
Objection resolved — Addressed
07/27/2026
Objection raised — Scope
07/27/2026
Objection raised — Scope
07/27/2026
Objection raised — Scope
07/27/2026
Objection raised — Scope
07/27/2026
Objection raised — Structural
07/27/2026
Special inspection requirement — Structural Steel - Welding
07/27/2026
Special inspection requirement — Masonry
07/27/2026
Special inspection requirement — Structural Steel - Details
07/27/2026
Special inspection requirement — Final
07/27/2026
Special inspection requirement — Subgrade Inspections
07/27/2026
Special inspection requirement — Concrete - Cast-In-Place
07/27/2026
Special inspection requirement — Structural Steel - High Strength Bolting
07/27/2026
Special inspection requirement — Concrete - Cast-In-Place
07/27/2026
Special inspection requirement — Footing and Foundation
07/27/2026
Special inspection requirement — Final
07/27/2026
Special inspection requirement — Subsurface Investigations (Borings/Test Pits)
07/27/2026
Special inspection requirement — Post-installed Anchors
Latest 60 of 93 events.
Nothing on file for this building.
1 project · most recent 08/03/2026
Storm Water/Sanitary
FiledStatusContractorScope
08/03/2026——Storm, Water/Sanitary
2 projects · most recent 04/22/2025
FiledStatusContractorScope
04/22/2025Permit IssuedTRIPLE D ELECTRIC INC3 meters, 3 new_meters
10/09/2020Permit IssuedRICHARD NEU—
1 project · most recent 08/03/2026
Steel Concrete Masonry
FiledStatusContractorScope
08/03/2026——Steel, Concrete, Masonry
2 projects · most recent 08/03/2026
Fence Sidewalk Shed
FiledStatusContractorScope
08/03/2026——Fence
10/09/2020——Sidewalk Shed
▾Special Inspection Requirements (DOB NOW) — 46
DateRequirementInspectorRole
09/01/2026Duct leakage testing, insulation and design—energy_progress
07/29/2026Structural Stability – Alterations of existing Buildings—special
07/29/2026Lighting controls—energy_progress
07/29/2026Structural Stability – Alterations of existing buildings—special
07/29/2026Demolition—special
07/27/2026Structural Steel - Welding—special
07/27/2026Masonry—special
07/27/2026Structural Steel - Details—special
07/27/2026Final—progress
07/27/2026Subgrade Inspections—special
07/27/2026Concrete - Cast-In-Place—special
07/27/2026Structural Steel - High Strength Bolting—special
07/27/2026Concrete - Cast-In-Place—special
07/27/2026Footing and Foundation—progress
07/27/2026Final—progress
07/27/2026Subsurface Investigations (Borings/Test Pits)—special
07/27/2026Post-installed Anchors—special
07/22/2026Shutoff dampers—energy_progress
07/21/2026HVAC-R and service water heating equipment—energy_progress
07/21/2026Mechanical Systems—special
07/21/2026Fire-Resistant Penetrations and Joints—special
07/21/2026Final—progress
07/21/2026Energy Code Compliance Inspections—progress
07/21/2026Fire-Resistance Rated Construction—progress
07/21/2026HVAC-R and service water heating system controls—energy_progress
Latest 25 of 46.
▾Documents — 27 on file (BIS + DOB NOW)
▸Plans & Drawings9
▸DOB NOWPlans/Sketch8
08/26/2026B01438083-I1Request digital key ↗
08/16/2026B01418533-I1Request digital key ↗
08/16/2026B01418533-S6Request digital key ↗
Showing 3 of 8 on file for this type
▸DOB NOWPlans/Sketch - Sidewalk Shed1
09/02/2026B00411154-I1Request digital key ↗
▸Zoning, Tax Lot & Property Records1
▸DOB NOWZD1: DOB Zoning Diagram1
08/16/2026B01418533-I1Open ↗
▸Seals & Professional Certifications9
▸DOB NOWDPL-1: Design Professional Seal & Signature9
09/02/2026B00411154-I1Open ↗
08/26/2026B01438083-I1Open ↗
08/16/2026B01418533-S6Open ↗
Showing 3 of 9 on file for this type
▸Safety & Tenant Protection2
▸DOB NOWTenant Protection Plan1
09/02/2026B00411154-I1Open ↗
▸DOB NOWStreet Tree Checklist1
08/16/2026B01418533-I1Open ↗
▸Environmental & Asbestos1
▸DOB NOWDEP ACP-5: Asbestos Assessment Report1
08/26/2026B01438083-I1Open ↗
▸Other Documents5
▸DOB NOWProperty Ownership Certification2
08/26/2026B01438083-I1Open ↗
08/16/2026B01418533-I1Open ↗
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone1
08/16/2026B01418533-I1Open ↗
▸DOB NOWStructure Photographs1
08/26/2026B01438083-I1Open ↗
▸DOB NOWSite Survey: Initial1
08/16/2026B01418533-I1Open ↗