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Miscellaneous two family
420 52 STREET
BROOKLYN · BIN 3013892
💬 Discuss this project
1920Year Built
2Stories
B9Building Class
R6BZoning
1,206 sfGross Floor Area
2Units
3 Open Violations ▸FDNY Report ↗
Miscellaneous two family · Owner of record: *** NO OWNER FOUND *** · 2,003 sf lot · 0.6 FAR built · Flood zone X
Locations of Work
StructuralCivil
Floor 411p · 1 filing · 20 docs
Floor 312p · 1 filing · 20 docs
Floor 211p · 1 filing · 20 docs
Floor 111p · 1 filing · 20 docs
Cellar11p · 1 filing · 20 docs
▾Owner History (Filing Record)
Companies and organizations named on filings. Individual owners are not shown.
OwnerFilingsMost Recent
TLS CONSTRUCTION GROUP I*603/22/2026
SHUN YING ZHENG 1103/22/2026
▾Sales History (ACRIS)
DatePriceUnitSeller → Buyer$/sf
09/25/2017$810K—— → —$672/sf building
▾Design Consultants (Architect / Engineer of Record)
FirmFilingsMost Recent
SQUARE ARCH, LLC301/05/2026
HUAN DESIGN INC.305/02/2025
▾Filing Representatives (Expediters)
RepresentativeFilingsMost Recent
GRAVITY STUDIO203/21/2026
▾Contractors (License-Anchored)
FirmTradeRolesMost Recent
TLS CONSTRUCTION GROUP I*General Contractor707/08/2026
KALE CONSTRUCTION INCGeneral Contractor303/21/2026
R & T ELECTRICAL CORPElectrical103/22/2026
J&P METRO DEV GROUP INCGeneral Contractor107/08/2026
▾Special Inspection Agencies
AgencyLicense #FilingsMost Recent
HUAN DESIGN INC7669501/05/2026
Building Lifecycle
All (72)Filed (6)Permit Issued (5)Signed Off (1)Violation (7)Inspection (7)Objection (16)Special Inspection (30)
06/30/2026
Inspection — Pass-Final CND-Occupancy Inspection
Pass
View inspection ↗
04/13/2026
Special inspection requirement — Interior lighting power
ZHENHUAN XU
04/13/2026
Special inspection requirement — Permanent certificate
ZHENHUAN XU
04/13/2026
Special inspection requirement — Air barrier - visual inspection
ZHENHUAN XU
04/13/2026
Special inspection requirement — Fire-Resistant Penetrations and Joints
ZHENHUAN XU
04/13/2026
Special inspection requirement — Concrete - Cast-In-Place
ZHENHUAN XU
04/13/2026
Special inspection requirement — Masonry
ZHENHUAN XU
04/13/2026
Special inspection requirement — Chimneys and vents
ZHENHUAN XU
04/13/2026
Special inspection requirement — Structural Cold-Formed Steel
ZHENHUAN XU
04/13/2026
Special inspection requirement — Structural Steel - Details
ZHENHUAN XU
04/13/2026
Special inspection requirement — Preliminary
ZHENHUAN XU
04/13/2026
Special inspection requirement — Structural Wood Frame
ZHENHUAN XU
04/13/2026
Special inspection requirement — Fire-Resistance Rated Construction
ZHENHUAN XU
04/13/2026
Special inspection requirement — Energy Code Compliance Inspections
ZHENHUAN XU
04/13/2026
Special inspection requirement — Final
ZHENHUAN XU
04/13/2026
Special inspection requirement — Footing and Foundation
ZHENHUAN XU
04/13/2026
Special inspection requirement — Lowest Floor Elevation
ZHENHUAN XU
04/13/2026
Special inspection requirement — Fenestration and door U-factor and product ratings
ZHENHUAN XU
04/13/2026
Special inspection requirement — Metering
ZHENHUAN XU
04/13/2026
Special inspection requirement — Fenestration areas
ZHENHUAN XU
04/13/2026
Special inspection requirement — Fenestration air leakage
ZHENHUAN XU
04/13/2026
Special inspection requirement — Maintenance information
ZHENHUAN XU
04/13/2026
Special inspection requirement — Insulation placement and R values
ZHENHUAN XU
04/08/2026
Objection raised — Zoning
04/08/2026
Objection resolved — Addressed
04/04/2026
Objection resolved — Addressed
04/03/2026
Objection raised — Admin
03/31/2026
Objection resolved — Addressed
03/25/2026
Objection raised — Other
03/23/2026
Inspection — Certified Water and Sanitary-WS-Fixtures-Finish
Certified
View inspection ↗
03/20/2026
Objection resolved — Addressed
03/09/2026
Objection raised — Zoning
02/26/2026
Objection resolved — Addressed
01/22/2026
Objection raised — Zoning
01/05/2026
Filed — ALT-CO - New Building with Existing Elements to Remain
BUILD TEMPORARY WOOD CONSTRUCTION FENCE WITH ASSOCIATED JOB.
B01195674-P2
09/26/2025
Filed — Alteration
PLUMING FIXTURES WITH ASSOCIATED PIPES FOR COMMUNITY FACILTY AND 2 FAMILY ASSOCIATED WITH JOB B01195674. NEW SPRINKLER WORK AS PER PLAN.
B01249786-I1
09/26/2025
Special inspection requirement — High Temperature Hot Water Piping (Welding)
ZHENHUAN XU
09/26/2025
Special inspection requirement — Fire-Resistant Penetrations and Joints
09/26/2025
Special inspection requirement — Energy Code Compliance Inspections
09/26/2025
Special inspection requirement — Permanent certificate
Kaijin Liang
09/26/2025
Special inspection requirement — HVAC-R and service water heating equipment
Kaijin Liang
09/26/2025
Special inspection requirement — HVAC-R and service water heating system controls
Kaijin Liang
09/18/2025
Signed off — Alteration
B01092368-I1
09/05/2025
Violation issued (ECB, open)
Unknown
09/05/2025
Violation issued (ECB, open)
Site Safety
09/05/2025
Violation issued (ECB, open)
Construction
09/05/2025
Violation issued (ECB, closed)
Construction
09/03/2025
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Roughing
Certified
View inspection ↗
09/03/2025
Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Underground
Certified
View inspection ↗
08/14/2025
Violation issued (ECB, closed)
Unknown
08/11/2025
Permit issued — Structural
B01195674-I1-GC-CX
08/06/2025
Violation issued (ECB, closed)
Construction
07/10/2025
Special inspection requirement — Metering
ZHENHUAN XU
07/10/2025
Special inspection requirement — Permanent certificate
ZHENHUAN XU
06/24/2025
Permit issued — Earth Work
B01195674-I1-GC-CX
05/21/2025
Permit issued — Construction Fence
B01195674-S1-FN
05/02/2025
Filed — ALT-CO - New Building with Existing Elements to Remain
BUILD TEMPORARY WOOD CONSTRUCTION FENCE WITH ASSOCIATED JOB.
B01195674-P1
04/14/2025
Permit issued — Construction Fence
B01195674-S1-FN
04/10/2025
Filed — ALT-CO - New Building with Existing Elements to Remain
BUILD TEMPORARY WOOD CONSTRUCTION FENCE WITH ASSOCIATED JOB.
B01195674-S1
04/07/2025
Objection resolved — Addressed
Latest 60 of 72 events.
Permit / Filing Register
SourceWork TypeStatusApplicantIssued
DOB NOWStructuralPermit IssuedTLS CONSTRUCTION GROUP I*08/11/2025
DOB NOWEarth WorkPermit IssuedTLS CONSTRUCTION GROUP I*06/24/2025
DOB NOWConstruction FencePermit IssuedTLS CONSTRUCTION GROUP I*05/21/2025
DOB NOWConstruction FencePermit IssuedJ&P METRO DEV GROUP INC04/14/2025
DOB NOWGeneral ConstructionSigned-offKALE CONSTRUCTION INC12/02/2024
1 project · most recent 09/26/2025
FiledStatusContractorScope
09/26/2025——38 heads
1 project · most recent 09/26/2025
Gas Water/Sanitary
FiledStatusContractorScope
09/26/2025——Gas, Water/Sanitary
2 projects · most recent 07/03/2025
General Wiring
FiledStatusContractorScope
07/03/2025Permit IssuedR & T ELECTRICAL CORPGeneral Wiring
08/29/2024Permit IssuedR & T ELECTRICAL CORPGeneral Wiring
1 project · most recent 01/05/2026
Steel Concrete Masonry Wood
FiledStatusContractorScope
01/05/2026Permit IssuedTLS CONSTRUCTION GROUP I*Steel, Concrete, Masonry, Wood
1 project · most recent 01/05/2026
Fence
FiledStatusContractorScope
01/05/2026Permit IssuedTLS CONSTRUCTION GROUP I*Fence
1 project · most recent 01/05/2026
Earthwork
FiledStatusContractorScope
01/05/2026Permit IssuedTLS CONSTRUCTION GROUP I*Earthwork
▾Field Inspections (DOB CAP) — 7
DateTypeResultReport
06/30/2026Pass-Final CND-Occupancy InspectionPassView ↗
03/23/2026Certified Water and Sanitary-WS-Fixtures-FinishCertifiedView ↗
09/03/2025Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
09/03/2025Certified Water and Sanitary-WS-Sanitary Piping-UndergroundCertifiedView ↗
11/16/2023Certified Gas-Gas-Piping-RoughingCertifiedView ↗
11/16/2023Certified Water and Sanitary-WS-Sanitary Piping-RoughingCertifiedView ↗
11/16/2023Certified Water and Sanitary-WS-Sanitary Piping-UndergroundCertifiedView ↗
▾Special Inspection Requirements (DOB NOW) — 54
DateRequirementInspectorRole
04/13/2026Interior lighting powerZHENHUAN XUenergy_progress
04/13/2026Permanent certificateZHENHUAN XUenergy_progress
04/13/2026Air barrier - visual inspectionZHENHUAN XUenergy_progress
04/13/2026Fire-Resistant Penetrations and JointsZHENHUAN XUspecial
04/13/2026Concrete - Cast-In-PlaceZHENHUAN XUspecial
04/13/2026MasonryZHENHUAN XUspecial
04/13/2026Chimneys and ventsZHENHUAN XUspecial
04/13/2026Structural Cold-Formed SteelZHENHUAN XUspecial
04/13/2026Structural Steel - DetailsZHENHUAN XUspecial
04/13/2026PreliminaryZHENHUAN XUprogress
04/13/2026Structural Wood FrameZHENHUAN XUprogress
04/13/2026Fire-Resistance Rated ConstructionZHENHUAN XUprogress
04/13/2026Energy Code Compliance InspectionsZHENHUAN XUprogress
04/13/2026FinalZHENHUAN XUprogress
04/13/2026Footing and FoundationZHENHUAN XUprogress
04/13/2026Lowest Floor ElevationZHENHUAN XUprogress
04/13/2026Fenestration and door U-factor and product ratingsZHENHUAN XUenergy_progress
04/13/2026MeteringZHENHUAN XUenergy_progress
04/13/2026Fenestration areasZHENHUAN XUenergy_progress
04/13/2026Fenestration air leakageZHENHUAN XUenergy_progress
04/13/2026Maintenance informationZHENHUAN XUenergy_progress
04/13/2026Insulation placement and R valuesZHENHUAN XUenergy_progress
09/26/2025High Temperature Hot Water Piping (Welding)ZHENHUAN XUspecial
09/26/2025Fire-Resistant Penetrations and Joints—special
09/26/2025Energy Code Compliance Inspections—progress
Latest 25 of 54.
▾Documents — 40 on file (BIS + DOB NOW)
▸Plans & Drawings6
▸DOB NOWPlans/Sketch6
08/24/2026B01092368-I1Request digital key ↗
08/20/2026B01249786-I1Request digital key ↗
08/19/2026B01195674-P1Request digital key ↗
Showing 3 of 6 on file for this type
▸Zoning, Tax Lot & Property Records3
▸DOB NOWZD1: DOB Zoning Diagram3
08/13/2026B01195674-P2Open ↗
08/13/2026B01195674-P1Open ↗
08/13/2026B01195674-I1Open ↗
▸Seals & Professional Certifications16
▸DOB NOWDPL-1: Design Professional Seal & Signature7
08/24/2026B01092368-I1Open ↗
08/20/2026B01249786-I1Open ↗
08/19/2026B01195674-I1Open ↗
Showing 3 of 7 on file for this type
▸DOB NOWProgress Inspector Seal & Signature6
09/02/2026B01195674-I1Open ↗
09/02/2026B01195674-I1Open ↗
08/26/2026B01092368-I1Open ↗
Showing 3 of 6 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature3
09/02/2026B01195674-I1Open ↗
08/26/2026B01092368-I1Open ↗
08/22/2026B01195674-P2Open ↗
▸Safety & Tenant Protection1
▸DOB NOWParks Department Acknowledgment Letter for Street Trees Plan1
08/13/2026B01195674-I1Open ↗
▸Environmental & Asbestos4
▸DOB NOWDEP ACP-5: Asbestos Assessment Report4
08/20/2026B01249786-I1Open ↗
08/13/2026B01195674-I1Open ↗
08/13/2026B01195674-P2Open ↗
Showing 3 of 4 on file for this type
▸Other Documents10
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone3
08/13/2026B01195674-P2Open ↗
08/13/2026B01195674-P1Open ↗
08/13/2026B01195674-I1Open ↗
▸DOB NOWSite Survey: Initial3
08/13/2026B01195674-I1Open ↗
08/13/2026B01195674-P2Open ↗
08/13/2026B01195674-P1Open ↗
▸DOB NOWProperty Ownership Certification3
08/13/2026B01195674-P2Open ↗
08/13/2026B01195674-I1Open ↗
08/13/2026B01195674-P1Open ↗
▸DOB NOWAdjoining Owners Notification1
08/13/2026B01195674-I1Open ↗