Locations of Work

MechanicalPlumbingGeneral

Floor 12p · 2 filings · 16 docs

Cellar2p · 2 filings · 16 docs

▾Owner History (Filing Record)

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

Owner	Filings	Most Recent
PEAK CAPITAL ADVISORS 2	7	07/08/2026
51ST AVENUE OWNER LLC	1	03/22/2026
JKO CONSTRUCTION CONSU	1	03/22/2026
5-13 51 AVENUE OWNER	2	03/21/2026

▾Sales History (ACRIS)

Date	Price	Unit	Seller → Buyer	$/sf
12/18/2020	$2.1M	—	— → —	$592/sf building

▾Design Consultants (Architect / Engineer of Record)

Firm	Filings	Most Recent
JAMES CHAI ARCHITECT, P.C.	2	12/22/2020

▾Filing Representatives (Expediters)

Representative	Filings	Most Recent
HTX BUILDING CONSULTING	2	03/21/2026

▾Contractors (License-Anchored)

Firm	Trade	Roles	Most Recent
JKO CONSTRUCTION & CONSU*	General Contractor	1	07/08/2026
PIPESTYLISTS, INC	Plumbing	1	07/08/2026

▾Special Inspection Agencies

Agency	License #	Filings	Most Recent
JAMES JH CHAI & ASSOCIATE	6481	2	12/22/2020

Building Lifecycle

All (34)Filed (2)Permit Issued (2)Signed Off (2)Violation (18)Special Inspection (10)

05/06/2026

Violation issued (HPD, open)

A

06/30/2023

Violation issued (DOB, closed)

V*-DOB VIOLATION - DISMISSED

06/30/2023

Violation issued (DOB, closed)

V*-DOB VIOLATION - DISMISSED

06/20/2023

Violation issued (DOB, closed)

V*-DOB VIOLATION - DISMISSED

04/25/2023

Violation issued (DOB, closed)

V*-DOB VIOLATION - DISMISSED

03/28/2023

Violation issued (HPD, closed)

A

03/03/2022

Violation issued (HPD, closed)

A

04/14/2021

Violation issued (HPD, closed)

A

04/06/2021

Signed off — Alteration

File MECH work in conjunction with OT job # at cellar , 001 to 003 and roof , no change in use , egress or occupancy

Q00431124-I1

03/29/2021

Permit issued — Mechanical Systems

Q00431124-I1-MS

03/26/2021

Signed off — Alteration

File PL work in conjunction with OT job# .....at Cellar , 001 to 003 Floor , no change in use , egress or occupancy

Q00431110-I1

01/05/2021

Permit issued — Plumbing

Q00431110-I1-PL

12/31/2020

Violation issued (ECB, closed)

Construction

12/22/2020

Filed — Alteration

File MECH work in conjunction with OT job # at cellar , 001 to 003 and roof , no change in use , egress or occupancy

Q00431124-I1

12/22/2020

Filed — Alteration

File PL work in conjunction with OT job# .....at Cellar , 001 to 003 Floor , no change in use , egress or occupancy

Q00431110-I1

11/20/2020

Special inspection requirement — Mechanical Systems

Joon Ho Chai

11/20/2020

Special inspection requirement — Fire-Resistant Penetrations and Joints

Joon Ho Chai

11/20/2020

Special inspection requirement — Final

Joon Ho Chai

11/20/2020

Special inspection requirement — Energy Code Compliance Inspections

Joon Ho Chai

11/20/2020

Special inspection requirement — HVAC and service water heating system controls

Joon Ho Chai

11/20/2020

Special inspection requirement — HVAC and service water heating equipment

Joon Ho Chai

11/20/2020

Special inspection requirement — HVAC insulation and sealing

Joon Ho Chai

11/20/2020

Special inspection requirement — Fire-Resistant Penetrations and Joints

Joon Ho Chai

11/20/2020

Special inspection requirement — HVAC and service water heating system controls

Joon Ho Chai

11/20/2020

Special inspection requirement — HVAC and service water heating equipment

Joon Ho Chai

11/01/2019

Violation issued (HPD, closed)

I

10/23/2018

Violation issued (HPD, closed)

I

12/01/2017

Violation issued (HPD, closed)

I

01/06/2006

Violation issued (DOB, closed)

V*-DOB VIOLATION - DISMISSED

03/16/1999

Violation issued (DOB, closed)

V*-DOB VIOLATION - DISMISSED

03/04/1987

Violation issued (HPD, closed)

C

03/04/1987

Violation issued (HPD, closed)

A

03/04/1987

Violation issued (HPD, closed)

C

05/29/1986

Violation issued (HPD, closed)

A

Permit / Filing Register

Source	Work Type	Status	Applicant	Issued
DOB NOW	Mechanical Systems	Signed-off	JKO CONSTRUCTION & CONSU*	03/29/2021
DOB NOW	Plumbing	Signed-off	T & T PLUMBING INC	01/05/2021
BIS	OT	ISSUED	JKO CONSTRUCTION & CONSU*	02/04/2021
BIS	OT	ISSUED	JKO CONSTRUCTION & CONSU*	12/23/2020
BIS	BL	ISSUED	CONSUMERS ENERGY GROUP	11/17/2006

1 project · most recent 01/08/2021

General Wiring

Filed	Status	Contractor	Scope
01/08/2021	Complete	E & M ELECTRICAL NY CORP	General Wiring

▾Special Inspection Requirements (DOB NOW) — 10

Date	Requirement	Inspector	Role
11/20/2020	Mechanical Systems	Joon Ho Chai	special
11/20/2020	Fire-Resistant Penetrations and Joints	Joon Ho Chai	special
11/20/2020	Final	Joon Ho Chai	progress
11/20/2020	Energy Code Compliance Inspections	Joon Ho Chai	progress
11/20/2020	HVAC and service water heating system controls	Joon Ho Chai	energy_progress
11/20/2020	HVAC and service water heating equipment	Joon Ho Chai	energy_progress
11/20/2020	HVAC insulation and sealing	Joon Ho Chai	energy_progress
11/20/2020	Fire-Resistant Penetrations and Joints	Joon Ho Chai	special
11/20/2020	HVAC and service water heating system controls	Joon Ho Chai	energy_progress
11/20/2020	HVAC and service water heating equipment	Joon Ho Chai	energy_progress

▾Documents — 41 on file (BIS + DOB NOW)

▸Plans & Drawings2

▸DOB NOWPlans/Sketch - Plumbing1

08/27/2026Q00431110-I1Request digital key ↗

▸DOB NOWPlans/Sketch - Mechanical Systems1

08/27/2026Q00431124-I1Request digital key ↗

▸Applications & Permits7

▸BISPLAN / WORK APPROVAL APPLICATION3

03/29/2021440658539Open ↗

01/14/2021440658539Open ↗

12/22/2020440658539Open ↗

▸BISPLAN - WORK & PERMITS - SUPPPORTING DOCUMENTATION3

01/22/2021440658539Open ↗

01/14/2021440658539Open ↗

▸BISWORK PERMIT APPLICATION1

12/23/2020440658539Open ↗

▸Seals & Professional Certifications16

▸DOB NOWProgress Inspector Seal & Signature7

09/25/2026Q00431110-I1Open ↗

09/02/2026Q00431124-I1Open ↗

Showing 3 of 7 on file for this type

▸DOB NOWSpecial Inspector Seal & Signature3

09/25/2026Q00431110-I1Open ↗

09/02/2026Q00431124-I1Open ↗

▸DOB NOWDPL-1: Design Professional Seal & Signature2

08/27/2026Q00431124-I1Open ↗

08/13/2026Q00431110-I1Open ↗

▸BISPROFESSIONAL CERTIFICATION STATEMENT1

12/22/2020440658539Open ↗

▸BISPROFESSIONAL CERTIFIED CHECKLIST1

02/03/2021440658539Open ↗

▸BISTECHNICAL REPORT STATEMENT OF RESPONSIBILITY1

12/22/2020440658539Open ↗

▸BISREQUIRED ITEMS CHECKLIST FOR PROFESSIONAL CERTIFICATION1

12/22/2020440658539Open ↗

▸Environmental & Asbestos3

▸DOB NOWDEP ACP-5: Asbestos Assessment Report2

08/27/2026Q00431124-I1Open ↗

08/13/2026Q00431110-I1Open ↗

▸BISASBESTOS: CERTIFICATION (DEP ACP5)1

12/22/2020440658539Open ↗

▸Energy Compliance4

▸BISTECHNICAL REPORT: ENERGY CODE - RESPONSIBILITY2

03/31/2021440658539Open ↗

12/23/2020440658539Open ↗

▸BISAS-BUILT ENERGY ANALYSIS (EN2)1

03/31/2021440658539Open ↗

▸BISTECHNICAL REPORT STATEMENT OF RESPONSIBILITY FOR ENERGY CODE PROGRESS INSPECTIONS1

12/22/2020440658539Open ↗

▸Inspections & Test Reports2

▸BISTECHNICAL REPORT: RESPONSIBILITY2

03/31/2021440658539Open ↗

12/23/2020440658539Open ↗

▸Approvals, Objections & Sign-offs1

▸BISCERTIFICATE OF OCCUPANCY/LOC: REQUEST1

03/31/2021440658539Open ↗

▸Cost, Insurance & Ownership2

▸BISCOST AFFIDAVIT1

12/22/2020440658539Open ↗

▸BISCOST AFFIDAVIT (FINAL): PW31

03/31/2021440658539Open ↗

▸Filing & Intake Forms4

▸BISADDITIONAL INFORMATION3

01/22/2021440658539Open ↗

01/12/2021440658539Open ↗

▸BISEFILING JOB APPLICATION COVER SHEET1

12/22/2020440658539Open ↗