Predominantly retail with other uses

42 EAST 21 STREET

MANHATTAN · Midtown South-Flatiron-Union Square · BIN 1016217

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1847Year Built

4Stories

K4Building Class

M1-5MZoning

6,675 sfGross Floor Area

6Units

0 Open Violations

Predominantly retail with other uses · Owner of record: PORTFOLIO3, LLC · 2,300 sf lot · 2.9 FAR built · Flood zone X

Locations of Work

ArchitectureStructuralElectricalMechanicalPlumbingGeneral

Cellar4p · 1 filing · 11 docs

Basement6p · 3 filings · 20 docs

Sub-Basement10p · 4 filings · 20 docs

Site & exterior5p · 1 filing · 14 docs

Filed — no permit issued3p · 1 filing · 5 docs

▾Owner History (Filing Record)

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

Owner	Filings	Most Recent
CGMT HALL REAL ESTATE	7	03/21/2026
TRI-STAR EQUITIES	2	03/21/2026
PORTFOLIO3, LLC	1	03/22/2026

▾Design Consultants (Architect / Engineer of Record)

Firm	Filings	Most Recent
DESIGN GROUP IN H&K LLC	8	07/18/2024
SAWICKITARELLA ARCHITECTURE+DESIGN	1	12/05/2022

▾Filing Representatives (Expediters)

Representative	Filings	Most Recent
METROPOLIS GROUP INC	16	03/21/2026
JANCO BUILDING CONSULTANTS	2	03/21/2026

▾Contractors (License-Anchored)

Firm	Trade	Roles	Most Recent
WECUSTOM INC	General Contractor	10	07/08/2026
REDLINE ELECTRIC INC	Electrical	1	03/22/2026
NEXUS PLUMBING & HEATING	Plumbing	1	07/08/2026

▾Special Inspection Agencies

Agency	License #	Filings	Most Recent
CHONG ENGINEERING P.C.	7411	8	07/18/2024

Building Lifecycle

All (58)Filed (9)Permit Issued (5)Signed Off (4)Violation (7)Inspection (3)Special Inspection (30)

08/27/2024

Signed off — Alteration

GENERAL CONSTRUCTION FOR NAIL SHOP (UG 6). INTERIOR PARTITIONS AND RELATED WORK AS PER PLANS. NO CHANGE IN USE, EGRESS, AND OCCUPANCY UNDER THIS APPLICATION.

M00910274-I1

08/27/2024

Signed off — Alteration

INSTALLATION OF MECHANICAL SYSTEMS IN CONJUNCTION WITH DOB#M00910274. (NAIL SHOP) NO CHANGE TO USE, EGRESS OR OCCUPANCY.

M00910283-I1

08/23/2024

Signed off — Alteration

Installation of Plumbing system in conjunction with DOB#M00910274 (Nail shop). No change in use, egress, or occupancy under this application.

M00910556-I1

08/23/2024

Signed off — Alteration

INSTALLATION OF STRUCTURAL STEEL LINTEL IN CONJUNCTION WITH DOB#M00910274. (NAIL SHOP) NO CHANGE IN USE, EGRESS, OR OCCUPANCY UNDER THIS APPLICATION.

M00911100-I1

07/22/2024

Special inspection requirement — HVAC-R and service water piping design and insulation

Tae Chong

07/22/2024

Special inspection requirement — HVAC-R and service water heating equipment

Tae Chong

07/22/2024

Special inspection requirement — HVAC-R and service water heating system controls

Tae Chong

07/22/2024

Special inspection requirement — Final

Tae Chong

07/22/2024

Special inspection requirement — Energy Code Compliance Inspections

Tae Chong

07/22/2024

Special inspection requirement — Fire-Resistant Penetrations and Joints

Tae Chong

07/22/2024

Special inspection requirement — Tenant Protection Plan Compliance

Tae Chong

07/22/2024

Special inspection requirement — Mechanical Systems

Tae Chong

07/18/2024

Filed — Alteration

GENERAL CONSTRUCTION FOR NAIL SHOP (UG 6). INTERIOR PARTITIONS AND RELATED WORK AS PER PLANS. NO CHANGE IN USE, EGRESS, AND OCCUPANCY UNDER THIS APPLICATION.

M00910274-P1

07/18/2024

Filed — Alteration

INSTALLATION OF STRUCTURAL STEEL LINTEL IN CONJUNCTION WITH DOB#M00910274. (NAIL SHOP) NO CHANGE IN USE, EGRESS, OR OCCUPANCY UNDER THIS APPLICATION.

M00911100-P1

07/18/2024

Filed — Alteration

INSTALLATION OF MECHANICAL SYSTEMS IN CONJUNCTION WITH DOB#M00910274. (NAIL SHOP) NO CHANGE TO USE, EGRESS OR OCCUPANCY.

M00910283-P1

07/09/2024

Special inspection requirement — Fire-Resistant Penetrations and Joints

Tae Chong

07/09/2024

Special inspection requirement — Mechanical Systems

Tae Chong

07/09/2024

Special inspection requirement — Tenant Protection Plan Compliance

Tae Chong

07/09/2024

Special inspection requirement — Energy Code Compliance Inspections

Tae Chong

07/09/2024

Special inspection requirement — Final

Tae Chong

07/09/2024

Special inspection requirement — HVAC-R and service water heating system controls

Tae Chong

07/09/2024

Special inspection requirement — HVAC-R and service water piping design and insulation

Tae Chong

07/09/2024

Special inspection requirement — Fire-Resistant Penetrations and Joints

Tae Chong

07/09/2024

Special inspection requirement — HVAC-R and service water heating equipment

Tae Chong

07/09/2024

Special inspection requirement — Post-installed Anchors

Tae Chong

07/09/2024

Special inspection requirement — Tenant Protection Plan Compliance

Tae Chong

07/09/2024

Special inspection requirement — Energy Code Compliance Inspections

Tae Chong

07/09/2024

Special inspection requirement — Final

Tae Chong

07/09/2024

Special inspection requirement — Fire-Resistance Rated Construction

Tae Chong

07/09/2024

Special inspection requirement — Interior lighting power

Tae Chong

07/09/2024

Special inspection requirement — Lighting controls

Tae Chong

06/05/2024

Inspection — Certified Water and Sanitary-WS-Fixtures-Finish

Certified

View inspection ↗

02/15/2024

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

Certified

View inspection ↗

02/15/2024

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

Certified

View inspection ↗

02/12/2024

Filed — Alteration

Installation of Plumbing system in conjunction with DOB#M00910274 (Nail shop). No change in use, egress, or occupancy under this application.

M00910556-P1

02/12/2024

Special inspection requirement — HVAC-R and service water heating system controls

Tae Chong

02/12/2024

Special inspection requirement — HVAC-R and service water piping design and insulation

Tae Chong

02/12/2024

Special inspection requirement — HVAC-R and service water heating equipment

Tae Chong

02/12/2024

Special inspection requirement — Energy Code Compliance Inspections

Tae Chong

02/12/2024

Special inspection requirement — Fire-Resistant Penetrations and Joints

Tae Chong

02/12/2024

Special inspection requirement — Tenant Protection Plan Compliance

Tae Chong

02/02/2024

Permit issued — General Construction

M00910274-I1-GC

11/06/2023

Permit issued — Plumbing

M00910556-I1-PL

08/14/2023

Permit issued — Structural

M00911100-I1-ST

08/14/2023

Permit issued — Mechanical Systems

M00910283-I1-MS

08/14/2023

Permit issued — General Construction

M00910274-I1-GC

08/09/2023

Filed — Alteration

INSTALLATION OF STRUCTURAL STEEL LINTEL IN CONJUNCTION WITH DOB#M00910274. (NAIL SHOP) NO CHANGE IN USE, EGRESS, OR OCCUPANCY UNDER THIS APPLICATION.

M00911100-I1

08/07/2023

Filed — Alteration

GENERAL CONSTRUCTION FOR NAIL SHOP (UG 6). INTERIOR PARTITIONS AND RELATED WORK AS PER PLANS. NO CHANGE IN USE, EGRESS, AND OCCUPANCY UNDER THIS APPLICATION.

M00910274-I1

08/07/2023

Filed — Alteration

INSTALLATION OF MECHANICAL SYSTEMS IN CONJUNCTION WITH DOB#M00910274. (NAIL SHOP) NO CHANGE TO USE, EGRESS OR OCCUPANCY.

M00910283-I1

08/07/2023

Filed — Alteration

Installation of Plumbing system in conjunction with DOB#M00910274 (Nail shop). No change in use, egress, or occupancy under this application.

M00910556-I1

05/03/2023

Violation issued (ECB, closed)

Unknown

12/05/2022

Filed — Alteration

PROPOSE TO REMOVE INTERIOR NON-BEARING PARTITIONS AND FINISHES AS PER PLANS FILED HEREWITH. NO CHANGE TO ZONING, USE, EGRESS OR OCCUPANCY

M08032197-I1

05/15/2014

Violation issued (DOB, closed)

V*-DOB VIOLATION - DISMISSED

02/27/2001

Violation issued (DOB, closed)

V*-DOB VIOLATION - DISMISSED

02/07/2000

Violation issued (DOB, closed)

V*-DOB VIOLATION - DISMISSED

03/16/1999

Violation issued (DOB, closed)

V*-DOB VIOLATION - DISMISSED

05/04/1998

Violation issued (DOB, closed)

V*-DOB VIOLATION - DISMISSED

09/16/1997

Violation issued (DOB, closed)

V*-DOB VIOLATION - DISMISSED

Permit / Filing Register

Source	Work Type	Status	Applicant	Issued
DOB NOW	General Construction	Signed-off	WECUSTOM INC	02/02/2024
DOB NOW	Plumbing	Signed-off	NEXUS PLUMBING & HEATING	11/06/2023
DOB NOW	Structural	Signed-off	WECUSTOM INC	08/14/2023
DOB NOW	Mechanical Systems	Signed-off	WECUSTOM INC	08/14/2023
DOB NOW	General Construction	Signed-off	WECUSTOM INC	08/14/2023
BIS	—	ISSUED	SAI CONTRACTING CORP	11/08/2024
BIS	PL	ISSUED	ADVANCED PLUMBING MECH	02/07/2023
BIS	—	ISSUED	SAI CONTRACTING CORP	11/28/2022
BIS	OT	ISSUED	SAI CONTRACTING CORP	05/02/2022
BIS	OT	ISSUED	SAI CONTRACTING CORP	05/02/2022
BIS	—	ISSUED	SAI CONTRACTING CORP	01/31/2022
BIS	OT	ISSUED	FINIX U.S.A. CONSTRUCTION	05/14/2017
BIS	PL	ISSUED	GW MECHANICAL CORP	02/06/2017
BIS	MH	RE-ISSUED	SAI CONTRACTING CORP	11/16/2016
BIS	OT	ISSUED	FINIX U.S.A. CONSTRUCTION	11/14/2016
BIS	PL	ISSUED	PREMIER PIPE SOLUTIONS	01/06/2015
BIS	—	ISSUED	CLONARD CONSTRUCTION LTD	12/16/2014

3 projects · most recent 11/06/2023

General Wiring Lighting

Filed	Status	Contractor	Scope
11/06/2023	Complete	Y.S ELECTRIC	General Wiring, Lighting
08/24/2023	Complete	REDLINE ELECTRIC INC	General Wiring
03/16/2023	Complete	REDLINE ELECTRIC INC	General Wiring

▾Field Inspections (DOB CAP) — 3

Date	Type	Result	Report
06/05/2024	Certified Water and Sanitary-WS-Fixtures-Finish	Certified	View ↗
02/15/2024	Certified Water and Sanitary-WS-Sanitary Piping-Roughing	Certified	View ↗
02/15/2024	Certified Water and Sanitary-WS-Sanitary Piping-Underground	Certified	View ↗

▾Special Inspection Requirements (DOB NOW) — 31

Date	Requirement	Inspector	Role
07/22/2024	HVAC-R and service water piping design and insulation	Tae Chong	energy_progress
07/22/2024	HVAC-R and service water heating equipment	Tae Chong	energy_progress
07/22/2024	HVAC-R and service water heating system controls	Tae Chong	energy_progress
07/22/2024	Final	Tae Chong	progress
07/22/2024	Energy Code Compliance Inspections	Tae Chong	progress
07/22/2024	Fire-Resistant Penetrations and Joints	Tae Chong	special
07/22/2024	Tenant Protection Plan Compliance	Tae Chong	special
07/22/2024	Mechanical Systems	Tae Chong	special
07/09/2024	Fire-Resistant Penetrations and Joints	Tae Chong	special
07/09/2024	Mechanical Systems	Tae Chong	special
07/09/2024	Tenant Protection Plan Compliance	Tae Chong	special
07/09/2024	Energy Code Compliance Inspections	Tae Chong	progress
07/09/2024	Final	Tae Chong	progress
07/09/2024	HVAC-R and service water heating system controls	Tae Chong	energy_progress
07/09/2024	HVAC-R and service water piping design and insulation	Tae Chong	energy_progress
07/09/2024	Fire-Resistant Penetrations and Joints	Tae Chong	special
07/09/2024	HVAC-R and service water heating equipment	Tae Chong	energy_progress
07/09/2024	Post-installed Anchors	Tae Chong	special
07/09/2024	Tenant Protection Plan Compliance	Tae Chong	special
07/09/2024	Energy Code Compliance Inspections	Tae Chong	progress
07/09/2024	Final	Tae Chong	progress
07/09/2024	Fire-Resistance Rated Construction	Tae Chong	progress
07/09/2024	Interior lighting power	Tae Chong	energy_progress
07/09/2024	Lighting controls	Tae Chong	energy_progress
02/12/2024	HVAC-R and service water heating system controls	Tae Chong	energy_progress

Latest 25 of 31.

▾Documents — 167 on file (BIS + DOB NOW)

▸Plans & Drawings9

▸DOB NOWPlans/Sketch9

09/01/2026M08032197-I1Request digital key ↗

08/29/2026M00910556-P1Request digital key ↗

08/29/2026M00910556-I1Request digital key ↗

Showing 3 of 9 on file for this type

▸Applications & Permits45

▸BISPLAN / WORK APPROVAL APPLICATION26

05/06/2025120928112Open ↗

12/05/2024120928112Open ↗

04/17/2024120928112Open ↗

Showing 3 of 26 on file for this type

▸BISWORK PERMIT APPLICATION9

02/08/2023122937411Open ↗

05/02/2022122937411Open ↗

Showing 3 of 9 on file for this type

▸DOB NOWLPC Approval/Permit9

08/29/2026M00911100-I1Open ↗

08/13/2026M00910274-P1Open ↗

08/13/2026M00910274-I1Open ↗

Showing 3 of 9 on file for this type

▸BISCERTIFICATE OF OCCUPANCY: APPLICATION1

04/01/2015120928112Open ↗

▸Seals & Professional Certifications29

▸DOB NOWDPL-1: Design Professional Seal & Signature9

09/01/2026M08032197-I1Open ↗

08/29/2026M00910556-I1Open ↗

08/29/2026M00910556-P1Open ↗

Showing 3 of 9 on file for this type

▸DOB NOWProgress Inspector Seal & Signature8

09/02/2026M00910274-P1Open ↗

08/28/2026M00910556-I1Open ↗

Showing 3 of 8 on file for this type

▸BISTECHNICAL REPORT: RESPONSIBILITY/CERTIFICATION5

01/09/2017122937411Open ↗

11/14/2016122937411Open ↗

Showing 3 of 5 on file for this type

▸DOB NOWSpecial Inspector Seal & Signature4

09/02/2026M00910274-P1Open ↗

08/28/2026M00910556-I1Open ↗

08/23/2026M00910283-P1Open ↗

Showing 3 of 4 on file for this type

▸BISPROFESSIONAL CERTIFICATION STATEMENT2

01/09/2017122937411Open ↗

11/14/2016122937411Open ↗

▸BISPROFESSIONAL CERTIFIED CHECKLIST1

11/14/2016122937411Open ↗

▸Trade Schedules & Equipment10

▸BISSCHEDULE B - PLUMBING/SPRINKLER/STANDPIPE4

06/02/2017122937411Open ↗

11/14/2016122937411Open ↗

01/07/2015120928112Open ↗

Showing 3 of 4 on file for this type

▸BISSELF-CERT PLUMBING NOTICE2

06/10/2015120928112Open ↗

▸BISSCHEDULE B - PLUMBING1

02/22/2023122937411Open ↗

▸BISDETECTOR:SMOKE-CERT. OF INSTALLATION1

03/20/2025120928112Open ↗

▸BISEQUIPMENT USE PERMITS1

08/01/2023122937411Open ↗

▸BISEQUIPMENT USE APPLICATION/PERMIT1

08/01/2023122937411Open ↗

▸Environmental & Asbestos11

▸DOB NOWDEP ACP-5: Asbestos Assessment Report9

09/01/2026M08032197-I1Open ↗

08/29/2026M00910556-I1Open ↗

08/29/2026M00910556-P1Open ↗

Showing 3 of 9 on file for this type

▸BISTHIS IS 'NOT AN ASBESTOS PROJECT'1

03/06/2012120928112Open ↗

▸BISASBESTOS: CERTIFICATION (DEP ACP5)1

11/14/2016122937411Open ↗

▸Energy Compliance14

▸BISTECHNICAL REPORT: ENERGY CODE - RESPONSIBILITY6

07/19/2023122937411Open ↗

05/22/2023122937411Open ↗

Showing 3 of 6 on file for this type

▸BISTECHNICAL REPORT: ENERGY CODE PROGRESS INSPS4

01/09/2017122937411Open ↗

11/17/2016122937411Open ↗

Showing 3 of 4 on file for this type

▸BISAS-BUILT ENERGY ANALYSIS (EN2)2

12/23/2024120928112Open ↗

07/19/2023122937411Open ↗

▸BISENERGY CODE COMPLIANCE INSPECTIONS1

02/12/2025120928112Open ↗

▸BISTECHNICAL REPORT: ENERGY1

03/06/2012120928112Open ↗

▸Inspections & Test Reports11

▸BISTECHNICAL REPORT: RESPONSIBILITY9

07/19/2023122937411Open ↗

07/17/2023122937411Open ↗

Showing 3 of 9 on file for this type

▸BISFIRE-RESISTANT PENETRATIONS AND JOINTS (FIRESTOP)1

02/12/2025120928112Open ↗

▸BISFIRE-RESISTIVE RATED CONSTRUCTION1

02/12/2025120928112Open ↗

▸Approvals, Objections & Sign-offs16

▸BISSUPERSEDING LETTER4

02/08/2023122937411Open ↗

05/02/2022122937411Open ↗

Showing 3 of 4 on file for this type

▸BISLETTERS - SUPPORTING DOCUMENTATION3

02/08/2023122937411Open ↗

04/28/2022122937411Open ↗

12/30/2021120928112Open ↗

▸BISSCHEDULE A - OCCUPANCY / USE3

04/17/2024120928112Open ↗

02/01/2024120928112Open ↗

01/07/2015120928112Open ↗

▸BISLANDMARKS APPROVAL3

11/17/2016122937411Open ↗

03/06/2012120928112Open ↗

▸BISADMINISTRATIVE OBJECTIONS1

03/06/2012120928112Open ↗

▸BISCERTIFICATE OF OCCUPANCY/LOC: REQUEST1

07/19/2023122937411Open ↗

▸BISLANDMARKS SIGNOFF1

02/12/2025120928112Open ↗

▸Cost, Insurance & Ownership5

▸BISCOST AFFIDAVIT4

11/14/2016122937411Open ↗

11/03/2014120928112Open ↗

08/28/2014120928112Open ↗

Showing 3 of 4 on file for this type

▸BISCOST AFFIDAVIT (FINAL): PW31

12/23/2024120928112Open ↗

▸Filing & Intake Forms14

▸BISADDITIONAL INFORMATION10

05/08/2025120928112Open ↗

01/16/2025120928112Open ↗

03/03/2023122937411Open ↗

Showing 3 of 10 on file for this type

▸BISEFILING COVER SHEET3

11/14/2016122937411Open ↗

08/28/2014120928112Open ↗

03/06/2012120928112Open ↗

▸BISBOROUGH INTAKE FORM1

02/08/2023122937411Open ↗

▸Other Documents3

▸BISPLOT DIAGRAM2

01/07/2015120928112Open ↗

03/06/2012120928112Open ↗

▸DOB NOWProof of Historic Building1

08/13/2026M08032197-I1Open ↗