Locations of Work

ArchitectureStructuralElectricalMechanicalPlumbingFire Protection

Roof11p · 2 filings · 20 docs

Bulkhead3p · 1 filing · 20 docs

Floor 45p · 1 filing · 20 docs

Floor 33p · 1 filing · 20 docs

Floor 25p · 1 filing · 20 docs

Floor 15p · 1 filing · 20 docs

Cellar8p · 1 filing · 20 docs

2 jobs · most recent 08/11/2026

Others Generators

Filed	Status	Contractor	Scope	Make / Model / Capacity
08/11/2026	—	—	Generators, Others	Generators Caterpillar C9 PGS 300 300 kW · Generator ×1 Other Obar Systems OBAR GBR89 150 CFM ×3
04/11/2025	—	—	Others	Other Obar Systems OBAR GBR89 150 CFM ×3

1 job · most recent 08/11/2026

Sprinkler System

Filed	Status	Contractor	Scope
08/11/2026	—	—	Sprinkler System

3 jobs · most recent 08/11/2026

Steel Concrete

Filed	Status	Contractor	Scope
08/11/2026	—	—	Steel, Concrete
08/26/2025	Permit Issued	DARCON CONSTRUCTION INC	1 scope_items
08/04/2025	Permit Issued	DARCON CONSTRUCTION INC	4 scope_items

1 job · most recent 02/07/2020

Fence

Filed	Status	Contractor	Scope
02/07/2020	Permit Issued	DARCON CONSTRUCTION INC	Fence

Building Lifecycle

All (111)Filed (28)Permit Issued (10)Violation (4)Objection (39)Special Inspection (30)

08/26/2026

Permit issued — Support of Excavation

Q01209315-I1-SE

08/21/2026

Special inspection requirement — Concrete - Cast-In-Place

NELSON LOPEZ

08/21/2026

Special inspection requirement — Deep Foundation Elements

NELSON LOPEZ

08/21/2026

Special inspection requirement — Final

NELSON LOPEZ

08/21/2026

Special inspection requirement — Subgrade Inspections

NELSON LOPEZ

08/21/2026

Special inspection requirement — Post-installed Anchors

NELSON LOPEZ

08/21/2026

Special inspection requirement — Subsurface Conditions – Fill Placement & In-Place Density

NELSON LOPEZ

08/21/2026

Special inspection requirement — Footing and Foundation

NELSON LOPEZ

08/17/2026

Objection raised — Other

08/14/2026

Objection raised — Other

08/14/2026

Objection resolved — Resolved

08/11/2026

Filed — New Building

The work depicted herein is for the construction of a new 26,578 sf school building with green roof and associated retaining walls, pavement, play area, landscaping, and the installation of new utilities.

Q01092618-P5

08/11/2026

Special inspection requirement — Footing and Foundation

NELSON LOPEZ

08/11/2026

Special inspection requirement — Structural Steel - Welding

NELSON LOPEZ

08/11/2026

Special inspection requirement — Structural Steel - Details

NELSON LOPEZ

08/11/2026

Special inspection requirement — Structural Stability – Alterations of existing buildings

NELSON LOPEZ

08/11/2026

Special inspection requirement — Excavations - Sheeting, Shoring, and Bracing

NELSON LOPEZ

08/11/2026

Special inspection requirement — Subsurface Conditions – Fill Placement & In-Place Density

NELSON LOPEZ

08/11/2026

Special inspection requirement — Concrete - Cast-In-Place

NELSON LOPEZ

08/07/2026

Filed — New Building

The work depicted herein is for the construction of a new 26,578 sf school building with green roof and associated retaining walls, pavement, play area, landscaping, and the installation of new utilities.

Q01092618-P4

08/07/2026

Special inspection requirement — Footing and Foundation

NELSON LOPEZ

08/07/2026

Special inspection requirement — Subsurface Conditions – Fill Placement & In-Place Density

NELSON LOPEZ

08/07/2026

Special inspection requirement — Final

NELSON LOPEZ

08/07/2026

Special inspection requirement — Post-installed Anchors

NELSON LOPEZ

08/07/2026

Special inspection requirement — Concrete - Cast-In-Place

NELSON LOPEZ

08/07/2026

Special inspection requirement — Subgrade Inspections

NELSON LOPEZ

08/07/2026

Special inspection requirement — Deep Foundation Elements

NELSON LOPEZ

08/04/2026

Special inspection requirement — Sprinkler Systems

NELSON LOPEZ

08/04/2026

Special inspection requirement — Standpipe Systems

NELSON LOPEZ

08/04/2026

Special inspection requirement — Fire-Resistant Penetrations and Joints

NELSON LOPEZ

08/04/2026

Special inspection requirement — Post-installed Anchors

NELSON LOPEZ

07/28/2026

Objection resolved — Addressed

07/16/2026

Special inspection requirement — Structural Steel - Details

07/16/2026

Special inspection requirement — Structural Steel - Welding

07/15/2026

Permit issued — Construction Fence

Q01383273-I1-FN

07/07/2026

Objection raised — Other

07/01/2026

Filed — Alteration

Q01209315-P1

06/30/2026

Permit issued — Construction Fence

Q01383273-I1-FN

05/13/2026

Objection raised — Other

05/13/2026

Objection resolved — Addressed

05/13/2026

Special inspection requirement — Masonry

NELSON LOPEZ

05/13/2026

Special inspection requirement — Fire-Resistant Penetrations and Joints

NELSON LOPEZ

05/13/2026

Special inspection requirement — Sprayed fire-resistant materials

NELSON LOPEZ

05/07/2026

Filed — New Building

The work depicted herein is for the construction of a new 26,578 sf school building with green roof and associated retaining walls, pavement, play area, landscaping, and the installation of new utilities.

Q01092618-P3

04/07/2026

Objection raised — Other

04/06/2026

Filed — Alteration

Construction Fence in conjunction with 4 story new school building and all related applications.

Q01383273-I1

02/21/2026

Violation issued (ECB, closed)

Construction

11/24/2025

Permit issued — Foundation

Q01095485-I1-FO

11/10/2025

Permit issued — Support of Excavation

Q01277426-I1-SE

09/26/2025

Objection resolved — Addressed

09/15/2025

Objection resolved — Addressed

09/03/2025

Objection raised — Other

08/26/2025

Filed — Alteration

THE WORK DEPICTED HEREIN IS FOR THE TEMPORARY SUPPORT OF EXCAVATION (SOE) FOR EXCAVATIONS 5 FT OR GREATER INDEPTH TO ALLOW FOR THE CONSTRUCTION OF PERIMETER BARRIER WALL AT 137-23 45TH AVENUE, QUEENS, NEW YORK.

Q01277426-I1

08/12/2025

Objection raised — Other

08/07/2025

Filed — New Building

The work depicted herein is for the construction of a new 26,578 sf school building with green roof and associated retaining walls, pavement, play area, landscaping, and the installation of new utilities.

Q01092618-P1

08/04/2025

Filed — Alteration

CONSTRUCTION OF PERIMETER BARRIER WALLS INCLUDE INSTALLATION OF DRILLED PIERS AND LOCAL EXCAVATION BETWEEN THE DRILLED PIERS TO INSTALL A PRECAST PIER AND PANEL. THE ANTICIPATED AREA OF GROUND DISTURBANCE IS ABOUT 19,865 SQUARE FEET.

Q01095485-P1

06/11/2025

Permit issued — Construction Fence

Q00310592-I1-FN

04/28/2025

Objection resolved — Addressed

04/28/2025

Objection resolved — Addressed

04/17/2025

Objection raised — Other

Latest 60 of 111 events.

▾Owner History (Filing Record)

Companies and organizations named on filings. Individual owners are not shown.

Owner	Filings	Most Recent
NYC SCHOOL CONSTRUCTION	29	09/13/2026
3T GC	12	07/08/2026
INC DARCON CONSTRUCTION	1	03/22/2026
4509 EIGHTH	1	03/22/2026
B SOSA ENTERPRISES	1	03/22/2026
ARMENIAN WELFARE ASSOC	1	03/22/2026

▾Sales History (ACRIS)

Date	Price	Unit	Seller → Buyer	$/sf
02/07/2024	$81.8M	—	4509 EIGHTH LLC → NEW YORK CITY SCHOOL CONSTRUCTION AUTHORITY	— not available
07/30/2018	$50.0M	—	— → —	— not available

▾Design Consultants (Architect / Engineer of Record)

Firm	Filings	Most Recent
NYC SCHOOL CONSTRUCTION AUTHORITY	9	08/11/2026
LANGAN ENGINEERING	9	07/01/2026
NYCSCA	4	05/07/2026
TAREK M. ZEID, PE, PLLC	1	04/06/2026
D&B ENGINEERS AND ARCHITECTS	2	04/11/2025
CHRISTOPHER RUANO-SALGUERO	2	01/16/2025
A & T ENGINEERING, P.C.	1	02/07/2020

▾Filing Representatives (Expediters)

Representative	Filings	Most Recent
NYC SCHOOL CONSTRUCTION AUTHORITY	20	03/21/2026

▾Contractors (License-Anchored)

Firm	Trade	Roles	Most Recent
B SOSA ENTERPRISES CORP	General Contractor	7	07/08/2026
DARCON CONSTRUCTION INC	General Contractor	4	07/08/2026
MPCC CORP	General Contractor	3	08/27/2026
NATIONAL ENVIROMENTAL SAFETY	General Contractor	2	03/21/2026

▾Special Inspection Agencies

Agency	License #	Filings	Most Recent
UNIVERSAL TESTING AND INS	400	18	08/11/2026

Permit / Filing Register

Source	Work Type	Status	Applicant	Issued
DOB NOW	Support of Excavation	Permit Issued	MPCC CORP	08/26/2026
DOB NOW	Construction Fence	Permit Issued	MPCC CORP	07/15/2026
DOB NOW	Construction Fence	Permit Issued	MPCC CORP	06/30/2026
DOB NOW	Foundation	Permit Issued	DARCON CONSTRUCTION INC	11/24/2025
DOB NOW	Support of Excavation	Permit Issued	DARCON CONSTRUCTION INC	11/10/2025
DOB NOW	Construction Fence	Permit Issued	DARCON CONSTRUCTION INC	06/11/2025
DOB NOW	Construction Fence	Permit Issued	NATIONAL ENVIROMENTAL SAF	08/29/2024
DOB NOW	Construction Fence	Permit Issued	B SOSA ENTERPRISES CORP	02/01/2022
DOB NOW	Construction Fence	Permit Issued	B SOSA ENTERPRISES CORP	10/13/2021
DOB NOW	Construction Fence	Permit Issued	B SOSA ENTERPRISES CORP	02/11/2020

▾Special Inspection Requirements (DOB NOW) — 150

Date	Requirement	Inspector	Role
08/21/2026	Concrete - Cast-In-Place	NELSON LOPEZ	special
08/21/2026	Post-installed Anchors	NELSON LOPEZ	special
08/21/2026	Deep Foundation Elements	NELSON LOPEZ	special
08/21/2026	Footing and Foundation	NELSON LOPEZ	progress
08/21/2026	Final	NELSON LOPEZ	progress
08/21/2026	Subsurface Conditions – Fill Placement & In-Place Density	NELSON LOPEZ	special
08/21/2026	Subgrade Inspections	NELSON LOPEZ	special
08/11/2026	Excavations - Sheeting, Shoring, and Bracing	NELSON LOPEZ	special
08/11/2026	Concrete - Cast-In-Place	NELSON LOPEZ	special
08/11/2026	Structural Stability – Alterations of existing buildings	NELSON LOPEZ	special
08/11/2026	Structural Steel - Details	NELSON LOPEZ	special
08/11/2026	Subsurface Conditions – Fill Placement & In-Place Density	NELSON LOPEZ	special
08/11/2026	Footing and Foundation	NELSON LOPEZ	progress
08/11/2026	Structural Steel - Welding	NELSON LOPEZ	special
08/07/2026	Footing and Foundation	NELSON LOPEZ	progress
08/07/2026	Final	NELSON LOPEZ	progress
08/07/2026	Subsurface Conditions – Fill Placement & In-Place Density	NELSON LOPEZ	special
08/07/2026	Subgrade Inspections	NELSON LOPEZ	special
08/07/2026	Concrete - Cast-In-Place	NELSON LOPEZ	special
08/07/2026	Deep Foundation Elements	NELSON LOPEZ	special
08/07/2026	Post-installed Anchors	NELSON LOPEZ	special
08/04/2026	Standpipe Systems	NELSON LOPEZ	special
08/04/2026	Sprinkler Systems	NELSON LOPEZ	special
08/04/2026	Post-installed Anchors	NELSON LOPEZ	special
08/04/2026	Fire-Resistant Penetrations and Joints	NELSON LOPEZ	special

Latest 25 of 150.

▾Documents — 267 on file (BIS + DOB NOW)

▸Plans & Drawings31

▸DOB NOWPlans/Sketch28

08/20/2026Q01207891-I1Request digital key ↗

08/20/2026Q01209315-I1Request digital key ↗

08/19/2026Q01095485-S1Request digital key ↗

Showing 3 of 28 on file for this type

▸DOB NOWPlans/Sketch - Place of Assembly2

08/20/2026Q01204240-I1Request digital key ↗

08/20/2026Q01199509-I1Request digital key ↗

▸DOB NOWPlans/Sketch - Construction Fence1

08/28/2026Q00310592-I1Request digital key ↗

▸Applications & Permits2

▸DOB NOWDEP Stormwater Construction Permit2

08/15/2026Q01092618-P3Open ↗

Showing 1 of 2 on file for this type

▸Zoning, Tax Lot & Property Records5

▸DOB NOWZD1: DOB Zoning Diagram2

08/15/2026Q01092618-P3Open ↗

08/13/2026Q01092618-I1Open ↗

▸DOB NOWZoning Exhibit form (1-5)2

08/15/2026Q01092618-P3Open ↗

08/13/2026Q01092618-I1Open ↗

▸DOB NOWHouse Number Verification: TOPO Stamp1

08/13/2026Q01092618-I1Open ↗

▸Seals & Professional Certifications84

▸DOB NOWDPL-1: Design Professional Seal & Signature31

08/20/2026Q01199509-I1Open ↗

08/20/2026Q01207891-I1Open ↗

08/20/2026Q01209315-I1Open ↗

Showing 3 of 31 on file for this type

▸DOB NOWSpecial Inspector Seal & Signature30

09/02/2026Q01092618-Z8Open ↗

09/02/2026Q01092618-Z4Open ↗

Showing 3 of 30 on file for this type

▸DOB NOWProgress Inspector Seal & Signature23

09/02/2026Q01092618-Z8Open ↗

09/02/2026Q01092618-Z4Open ↗

09/01/2026Q01207891-I1Open ↗

Showing 3 of 23 on file for this type

▸Trade Schedules & Equipment4

▸DOB NOWDEP: Sewer Certification (Sanitary/Storm)4

On file, but not among the 200 most recently loaded documents for this source.

Showing 0 of 4 on file for this type

▸Safety & Tenant Protection8

▸DOB NOWStreet Tree Checklist6

08/15/2026Q01092618-P3Open ↗

08/13/2026Q01092618-I1Open ↗

08/13/2026Q01092618-Z7Open ↗

Showing 3 of 6 on file for this type

▸DOB NOWNYCSCA - Approved Site Safety Plans1

08/17/2026Q01383273-I1Open ↗

▸DOB NOWParks Department Acknowledgment Letter for Street Trees Plan1

08/16/2026Q01092618-I1Open ↗

▸Environmental & Asbestos28

▸DOB NOWOER: Notice to Proceed21

08/20/2026Q01209315-I1Open ↗

08/16/2026Q01092618-Y2Open ↗

08/16/2026Q01092618-Y1Open ↗

Showing 3 of 21 on file for this type

▸DOB NOWOER: Notice of Satisfaction5

08/20/2026Q01209315-I1Open ↗

08/15/2026Q01209315-P1Open ↗

08/14/2026Q01095485-I1Open ↗

Showing 3 of 5 on file for this type

▸DOB NOWDEP ACP-5: Asbestos Assessment Report2

08/14/2026Q01095485-I1Open ↗

08/14/2026Q01095485-P1Open ↗

▸Inspections & Test Reports1

▸DOB NOWTR5 Test Report1

08/14/2026Q01095485-I1Open ↗

▸Approvals, Objections & Sign-offs57

▸DOB NOWFee Exempt Supporting Document - DOF ACRIS report or BIB letter30

08/20/2026Q01209315-I1Open ↗

08/19/2026Q01095485-S1Open ↗

08/17/2026Q01383273-I1Open ↗

Showing 3 of 30 on file for this type

▸DOB NOWDesign Commission Approval City Owned (Exterior Work)27

08/17/2026Q01383273-I1Open ↗

08/16/2026Q01092618-P4Open ↗

08/16/2026Q01092618-I1Open ↗

Showing 3 of 27 on file for this type

▸Other Documents47

▸DOB NOWNYCSCA - BCC Plan Examination Transmittal30

08/17/2026Q01383273-I1Open ↗

08/16/2026Q01092618-P5Open ↗

08/16/2026Q01092618-P4Open ↗

Showing 3 of 30 on file for this type

▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone6

08/15/2026Q01092618-P3Open ↗

Showing 1 of 6 on file for this type

▸DOB NOWSite Survey: Initial6

08/15/2026Q01092618-P3Open ↗

08/13/2026Q01092618-I1Open ↗

08/13/2026Q01092618-P1Open ↗

Showing 3 of 6 on file for this type

▸DOB NOWProperty Ownership Certification2

08/16/2026Q01092618-I1Open ↗

08/15/2026Q01092618-P3Open ↗

▸DOB NOWAdjoining Owners Notification2

08/20/2026Q01209315-I1Open ↗

08/13/2026Q01277426-I1Open ↗

▸DOB NOWAlternate Plan 11

08/20/2026Q01199509-I1Open ↗