Locations of Work

ArchitectureStructuralMechanicalPlumbingFire ProtectionCivil

Permit Issued — active, not yet Signed-off

RoofUnder Construction26p · 5 filings · 20 docs

PenthouseUnder Construction28p · 5 filings · 20 docs

Floor 4Under Construction28p · 6 filings · 20 docs

Floor 3Under Construction32p · 6 filings · 20 docs

Floor 2Under Construction29p · 6 filings · 20 docs

Floor 1Under Construction28p · 6 filings · 20 docs

CellarUnder Construction35p · 6 filings · 20 docs

▾Owner History (Filing Record)

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

Owner	Filings	Most Recent
HY DESIGN DEVELOPMENT L	17	07/08/2026
245 21ST STREET LLC	1	03/22/2026

▾Sales History (ACRIS)

Date	Price	Unit	Seller → Buyer	$/sf
11/19/2020	$1000K	—	Private party → 245 21ST STREET LLC	$588/sf building

▾Design Consultants (Architect / Engineer of Record)

Firm	Filings	Most Recent
BASIC GROUPS CORP	13	03/09/2026
FL&M ENGINEERING DESIGN &INSPECTION	3	10/22/2025

▾Filing Representatives (Expediters)

Representative	Filings	Most Recent
BASIC GROUPS	26	03/21/2026

▾Contractors (License-Anchored)

Firm	Trade	Roles	Most Recent
HY DESIGN & DEVELOPMENT LLC.	General Contractor	10	09/16/2026
MC SUPERSTRUCTURE INC	General Contractor	3	07/08/2026
DYNAMIC PLBNG & SPRKR COR	Fire Protection	2	09/30/2026
NORTHEAST SPECIALIST GROUP	General Contractor	2	03/21/2026
ROCK E SMALL PLBG&HTG INC	Plumbing	2	09/13/2026
PLUMBING NYC INC	Plumbing	1	07/08/2026

▾Special Inspection Agencies

Agency	License #	Filings	Most Recent
BEALIN GROUPS CORP	9869	2	03/09/2026
PCMARCHITECTS PLLC	2812	3	08/26/2025
JUST CONSULTING ENGINEERI	5865	5	07/23/2025
JIAN ENGINEERING PLLC	7397	1	09/21/2022

Building Lifecycle

All (103)Filed (16)Permit Issued (16)Signed Off (2)Violation (9)Inspection (10)Objection (20)Special Inspection (30)

09/29/2026

Permit issued — Sprinklers

B00788394-I1-EW-SP

09/15/2026

Permit issued — General Construction

B00612705-I1-GC

09/11/2026

Permit issued — Plumbing

B00622599-I1-PL

08/05/2026

Inspection — Certified Sprinkler-SP-Piping Dry/Wet-Hydrostatic Test

Certified

View inspection ↗

06/10/2026

Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Underground

Certified

View inspection ↗

06/05/2026

Permit issued — Plumbing

B50122896-I1-PL

04/17/2026

Inspection — Certified Storm Drainage-ST-Piping-Roughing

Certified

View inspection ↗

04/17/2026

Inspection — Certified Storm Drainage-ST-Piping-Underground

Certified

View inspection ↗

03/18/2026

Special inspection requirement — Fire-Resistant Penetrations and Joints

XIAOJUN WANG

03/18/2026

Special inspection requirement — Energy Code Compliance Inspections

Sugnam Chang

03/09/2026

Filed — Alteration

SUBMIT PLUMBING PLAN IN CONJUNCTION WITH NB APPLICATION #B00612705-I1.

B00622599-P3

03/06/2026

Special inspection requirement — Fire-Resistant Penetrations and Joints

ANDREW GOODRICH

03/06/2026

Special inspection requirement — Energy Code Compliance Inspections

Sugnam Chang

03/03/2026

Inspection — Certified Gas-Gas-Piping-Roughing

Certified

View inspection ↗

03/03/2026

Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Roughing

Certified

View inspection ↗

03/03/2026

Inspection — Certified Water and Sanitary-WS-Sanitary Piping-Underground

Certified

View inspection ↗

02/13/2026

Objection resolved — Addressed

01/27/2026

Objection raised — Cost

01/16/2026

Filed — Alteration

SUBMIT PLUMBING PLAN IN CONJUNCTION WITH NB APPLICATION #B00612705-I1.

B00622599-P1

01/12/2026

Special inspection requirement — Fire-Resistant Penetrations and Joints

ANDREW GOODRICH

01/12/2026

Special inspection requirement — Energy Code Compliance Inspections

Sugnam Chang

12/12/2025

Inspection — Pass-Final PL - Underground

Pass

View inspection ↗

12/06/2025

Violation issued (ECB, closed)

Unknown

12/06/2025

Violation issued (ECB, closed)

Construction

12/06/2025

Violation issued (ECB, closed)

Unknown

12/03/2025

Permit issued — Sprinklers

B00788394-I1-EW-SP

11/28/2025

Permit issued — Mechanical Systems

B00622604-I1-MS

10/22/2025

Filed — Alteration

INSTALLATION OF 300 PSF SIDEWALK SHED AND PIPE SCAFFOLD AS PER PLANS. ALL EQUIPMENT SHALL COMPLY WITH CHAPTER #33 OF THE 2022 CODE. NO CHANGE IN USE, EGRESS OR OCCUPANCY UNDER THIS APPLICATION.

B01243113-P2

10/15/2025

Violation issued (ECB, closed)

Unknown

10/15/2025

Violation issued (ECB, closed)

Construction

10/13/2025

Violation issued (ECB, closed)

Construction

10/13/2025

Violation issued (ECB, closed)

Unknown

10/10/2025

Signed off — Alteration

B00797992-I1

10/03/2025

Signed off — New Building

FILING FOR FO WORK IN CONJUNCTION WITH NB APPLICATION #B00612705-I1.

B00612705-S1

09/30/2025

Special inspection requirement — Fenestration air leakage

Sugnam Chang

09/30/2025

Special inspection requirement — Fenestration areas

Sugnam Chang

09/30/2025

Special inspection requirement — Fenestration and door U-factor and product ratings

Sugnam Chang

09/30/2025

Special inspection requirement — Lighting controls

Sugnam Chang

09/30/2025

Special inspection requirement — Air barrier - visual inspection

Sugnam Chang

09/30/2025

Special inspection requirement — Protection of exposed foundation insulation

Sugnam Chang

09/30/2025

Special inspection requirement — Fire-Resistance Rated Construction

Sugnam Chang

09/30/2025

Special inspection requirement — Metering

Sugnam Chang

09/30/2025

Special inspection requirement — Interior lighting power

Sugnam Chang

09/30/2025

Special inspection requirement — Masonry

Sugnam Chang

09/30/2025

Special inspection requirement — Concrete - Cast-In-Place

Sugnam Chang

09/30/2025

Special inspection requirement — Insulation placement and R values

Sugnam Chang

09/30/2025

Special inspection requirement — Fire-Resistant Penetrations and Joints

Sugnam Chang

09/30/2025

Special inspection requirement — Energy Code Compliance Inspections

Sugnam Chang

09/30/2025

Special inspection requirement — Air barrier — testing

Sugnam Chang

09/30/2025

Special inspection requirement — Lighting in dwelling units

Sugnam Chang

09/30/2025

Special inspection requirement — Maintenance information

Sugnam Chang

09/17/2025

Permit issued — General Construction

B00612705-I1-GC

09/12/2025

Filed — Alteration

INSTALLATION OF 300 PSF SIDEWALK SHED AND PIPE SCAFFOLD AS PER PLANS. ALL EQUIPMENT SHALL COMPLY WITH CHAPTER #33 OF THE 2022 CODE. NO CHANGE IN USE, EGRESS OR OCCUPANCY UNDER THIS APPLICATION.

B01243113-P1

08/26/2025

Filed — New Building

FILING FOR FO WORK IN CONJUNCTION WITH NB APPLICATION #B00612705-I1.

B00612705-P3

08/26/2025

Special inspection requirement — Fire-Resistance Rated Construction

Sugnam Chang

08/26/2025

Special inspection requirement — Air barrier - visual inspection

Sugnam Chang

08/26/2025

Special inspection requirement — Fire-Resistant Penetrations and Joints

Sugnam Chang

08/26/2025

Special inspection requirement — Masonry

Sugnam Chang

08/26/2025

Special inspection requirement — Concrete - Cast-In-Place

Sugnam Chang

08/26/2025

Special inspection requirement — Energy Code Compliance Inspections

Sugnam Chang

Latest 60 of 103 events.

Permit / Filing Register

Source	Work Type	Status	Applicant	Issued
DOB NOW	Sprinklers	Permit Issued	DYNAMIC PLBNG & SPRKR COR	09/29/2026
DOB NOW	General Construction	Permit Issued	HY DESIGN & DEVELOPMENT LLC.	09/15/2026
DOB NOW	Plumbing	Permit Issued	ROCK E SMALL PLBG&HTG INC	09/11/2026
DOB NOW	Plumbing	Permit Issued	PLUMBING NYC INC	06/05/2026
DOB NOW	Sprinklers	Permit Issued	CITYWIDE PLBG, HTG &SPRKL	12/03/2025
DOB NOW	Mechanical Systems	Permit Issued	FANG YE	11/28/2025
DOB NOW	General Construction	Permit Issued	FANG YE	09/17/2025
DOB NOW	Supported Scaffold	Permit Issued	MC SUPERSTRUCTURE INC	08/20/2025
DOB NOW	Sidewalk Shed	Permit Issued	MC SUPERSTRUCTURE INC	08/20/2025
DOB NOW	Structural	Permit Issued	FANG YE	08/15/2025
DOB NOW	Plumbing	Permit Issued	ROCK E SMALL PLBG&HTG INC	07/16/2025
DOB NOW	Foundation	Signed-off	FANG YE	06/20/2025
DOB NOW	Support of Excavation	Signed-off	FANG YE	05/05/2025
DOB NOW	Construction Fence	Permit Issued	FANG YE	04/21/2025
DOB NOW	General Construction	Permit Issued	FANG YE	04/18/2025
DOB NOW	Construction Fence	Permit Issued	NORTHEAST SPECIALIST GROUP	07/08/2024
BIS	—	ISSUED	NORTHEAST SPECIALIST GROUP	07/16/2024

1 project · most recent 03/09/2026

Gas Storm Water/Sanitary

Filed	Status	Contractor	Scope
03/09/2026	Permit Issued	ROCK E SMALL PLBG&HTG INC	Gas, Storm, Water/Sanitary

2 projects · most recent 04/14/2026

General Wiring

Filed	Status	Contractor	Scope
04/14/2026	Permit Issued	NYCO ELECTRIC CORP	General Wiring
08/22/2025	Complete	NASH ELECTRIC SERVICES IN	—

2 projects · most recent 08/26/2025

Steel Concrete Masonry

Filed	Status	Contractor	Scope
08/26/2025	Permit Issued	HY DESIGN & DEVELOPMENT L	3 scope_items
09/21/2022	Permit Issued	HY DESIGN & DEVELOPMENT L	Steel, Concrete, Masonry

2 projects · most recent 10/22/2025

Scaffold Sidewalk Shed Fence

Filed	Status	Contractor	Scope
10/22/2025	Permit Issued	MC SUPERSTRUCTURE INC	Scaffold, Sidewalk Shed
11/21/2023	—	—	Fence

▾Field Inspections (DOB CAP) — 10

Date	Type	Result	Report
08/05/2026	Certified Sprinkler-SP-Piping Dry/Wet-Hydrostatic Test	Certified	View ↗
06/10/2026	Certified Water and Sanitary-WS-Sanitary Piping-Underground	Certified	View ↗
04/17/2026	Certified Storm Drainage-ST-Piping-Roughing	Certified	View ↗
04/17/2026	Certified Storm Drainage-ST-Piping-Underground	Certified	View ↗
03/03/2026	Certified Gas-Gas-Piping-Roughing	Certified	View ↗
03/03/2026	Certified Water and Sanitary-WS-Sanitary Piping-Roughing	Certified	View ↗
03/03/2026	Certified Water and Sanitary-WS-Sanitary Piping-Underground	Certified	View ↗
12/12/2025	Pass-Final PL - Underground	Pass	View ↗
08/06/2024	Pass-Final PL - Up to 9 Requested Floors	Pass	View ↗
03/07/2024	Pass-Final PL - Underground	Pass	View ↗

▾Special Inspection Requirements (DOB NOW) — 61

Date	Requirement	Inspector	Role
03/18/2026	Energy Code Compliance Inspections	Sugnam Chang	progress
03/18/2026	Fire-Resistant Penetrations and Joints	XIAOJUN WANG	special
03/06/2026	Fire-Resistant Penetrations and Joints	ANDREW GOODRICH	special
03/06/2026	Energy Code Compliance Inspections	Sugnam Chang	progress
01/12/2026	Fire-Resistant Penetrations and Joints	ANDREW GOODRICH	special
01/12/2026	Energy Code Compliance Inspections	Sugnam Chang	progress
09/30/2025	Insulation placement and R values	Sugnam Chang	energy_progress
09/30/2025	Fenestration areas	Sugnam Chang	energy_progress
09/30/2025	Air barrier — testing	Sugnam Chang	energy_progress
09/30/2025	Metering	Sugnam Chang	energy_progress
09/30/2025	Fire-Resistant Penetrations and Joints	Sugnam Chang	special
09/30/2025	Concrete - Cast-In-Place	Sugnam Chang	special
09/30/2025	Masonry	Sugnam Chang	special
09/30/2025	Fire-Resistance Rated Construction	Sugnam Chang	progress
09/30/2025	Energy Code Compliance Inspections	Sugnam Chang	progress
09/30/2025	Lighting controls	Sugnam Chang	energy_progress
09/30/2025	Air barrier - visual inspection	Sugnam Chang	energy_progress
09/30/2025	Lighting in dwelling units	Sugnam Chang	energy_progress
09/30/2025	Fenestration and door U-factor and product ratings	Sugnam Chang	energy_progress
09/30/2025	Protection of exposed foundation insulation	Sugnam Chang	energy_progress
09/30/2025	Maintenance information	Sugnam Chang	energy_progress
09/30/2025	Fenestration air leakage	Sugnam Chang	energy_progress
09/30/2025	Interior lighting power	Sugnam Chang	energy_progress
08/26/2025	Air barrier — testing	Sugnam Chang	energy_progress
08/26/2025	Protection of exposed foundation insulation	Sugnam Chang	energy_progress

Latest 25 of 61.

▾Documents — 105 on file (BIS + DOB NOW)

▸Plans & Drawings16

▸DOB NOWPlans/Sketch16

08/31/2026B00622613-I1Request digital key ↗

08/31/2026B00622604-I1Request digital key ↗

08/28/2026B00788394-I1Request digital key ↗

Showing 3 of 16 on file for this type

▸Applications & Permits5

▸BISPLAN / WORK APPROVAL APPLICATION4

07/21/2025340919162Open ↗

12/01/2023322046754Open ↗

11/28/2023322046754Open ↗

Showing 3 of 4 on file for this type

▸BISWORK PERMIT APPLICATION1

07/17/2024322046754Open ↗

▸Zoning, Tax Lot & Property Records4

▸DOB NOWZD1: DOB Zoning Diagram2

08/20/2026B00612705-I1Open ↗

08/13/2026B00612705-P3Open ↗

▸DOB NOWZoning Exhibit form (1-5)2

08/20/2026B00612705-I1Open ↗

08/13/2026B00612705-P3Open ↗

▸Seals & Professional Certifications47

▸DOB NOWProgress Inspector Seal & Signature17

09/02/2026B00622599-I1Open ↗

08/31/2026B00612705-S1Open ↗

Showing 3 of 17 on file for this type

▸DOB NOWDPL-1: Design Professional Seal & Signature16

08/31/2026B00622613-I1Open ↗

08/31/2026B00622604-I1Open ↗

08/28/2026B00797992-I1Open ↗

Showing 3 of 16 on file for this type

▸DOB NOWSpecial Inspector Seal & Signature12

09/02/2026B00622599-I1Open ↗

08/31/2026B00612705-S1Open ↗

Showing 3 of 12 on file for this type

▸BISAPPLICANT OWNER SIGNATURE1

07/21/2025340919162Open ↗

▸BISTECHNICAL REPORT STATEMENT OF RESPONSIBILITY1

07/21/2025340919162Open ↗

▸Trade Schedules & Equipment3

▸DOB NOWDEP: Sewer Certification (Sanitary/Storm)2

08/20/2026B00612705-I1Open ↗

08/13/2026B00612705-P3Open ↗

▸BISSEWER/HOUSE CON SIGNOFF: DEP HC 0211

07/17/2024322046754Open ↗

▸Safety & Tenant Protection4

▸DOB NOWStreet Tree Checklist2

08/20/2026B00612705-I1Open ↗

08/13/2026B00612705-P3Open ↗

▸BISBPP: STREET TREES SITE PLAN1

07/29/2025340919162Open ↗

▸DOB NOWParks Department Acknowledgment Letter for Street Trees Plan1

08/13/2026B00612705-I1Open ↗

▸Environmental & Asbestos1

▸BISRODENT CONTROL1

07/17/2024322046754Open ↗

▸Inspections & Test Reports3

▸DOB NOWSOIL REPORT2

08/20/2026B00612705-S1Open ↗

08/13/2026B00612705-P2Open ↗

▸DOB NOWTR4 Test Report and Plot Diagram1

08/13/2026B00612705-S1Open ↗

▸Approvals, Objections & Sign-offs10

▸BISLETTERS - SUPPORTING DOCUMENTATION10

07/17/2024322046754Open ↗

Showing 3 of 10 on file for this type

▸Cost, Insurance & Ownership1

▸BISPROJECT-SPECIFIC GL INSURANCE1

07/17/2024322046754Open ↗

▸Filing & Intake Forms1

▸BISEFILING JOB APPLICATION COVER SHEET1

07/21/2025340919162Open ↗

▸Other Documents10

▸DOB NOWSite Survey: Initial2

08/20/2026B00612705-I1Open ↗

08/13/2026B00612705-P3Open ↗

▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone2

08/20/2026B00612705-I1Open ↗

08/13/2026B00612705-P3Open ↗

▸DOB NOWProperty Ownership Certification2

08/20/2026B00612705-I1Open ↗

08/13/2026B00612705-P3Open ↗

▸BISEXTERNAL FORMS - SUPPORTING DOCUMENTATION1

07/17/2024322046754Open ↗

▸DOB NOWAdjoining Owners Notification1

08/13/2026B00797992-I1Open ↗

▸DOB NOWFinal Survey1

08/13/2026B00612705-I1Open ↗

▸DOB NOWProject Specific General Liability (PGL1)1

08/13/2026B00612705-I1Open ↗