Leviathan Mechanical Corp. — NYC Fire Suppression Contractor: DOB Permits, Filings & Buildings

Contractor

LEVIATHAN MECHANICAL CORP

Fire Suppression Contractor

1 project with open permitsBROOKLYN · 9MANHATTAN · 3STATEN ISLAND · 2

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15 buildings

Total Filings

Projects on File

Buildings Worked

Projects w/ Open Permits

Fire Suppression Contractor

Primary Trade

Activity

Projects by first filing month15 projects all-time

bars = month · line = 3-mo average

Portfolio status

Browse projects →

Open permit17%

Other status1493%

By project type

Alteration1

Most active buildings

All buildings →

2 WEST 13 STREETMANHATTAN · latest 09/22/2016

1 projects

114 WEST 46 STREETMANHATTAN · latest 05/05/2008

1 projects

MAIN STREETMANHATTAN · latest 09/30/2011

1 projects

790 BROADWAYBROOKLYN · latest 02/23/2015

1 projects

200 LINWOOD STREETBROOKLYN · latest 01/27/2017

1 projects

249 EAST 17 STREETBROOKLYN · latest 06/13/2014

1 projects

Key relationships

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Design firms

SYSKA HENNESSY GROUP

1 projects

Most recent projects

All projects →

Project	Address	Type	Status	Filed	Latest permit	On the project	Description
B00345572 ↗	10502 AVENUE D BROOKLYN	Alteration	Permit Issued	05/08/2020	09/24/2026	Design SYSKA HENNESSY GROUP	Sprinkler work on the 1st as indicated on drawings.
302572516BIS	2974 AVENUE X BROOKLYN	—	ISSUED	05/02/2018	07/28/2025	—	SP
302571036BIS	200 LINWOOD STREET BROOKLYN	—	ISSUED	10/20/2014	01/27/2017	—	OT, PL, SP
120781163BIS	2 WEST 13 STREET MANHATTAN	—	ISSUED	06/06/2013	09/22/2016	—	PL, SP
302572259BIS	2212 BEDFORD AVENUE BROOKLYN	—	ISSUED	01/23/2015	03/14/2016	—	SP
340161256BIS	790 BROADWAY BROOKLYN	—	ISSUED	10/09/2014	02/23/2015	—	MH, PL, SP

Counts cover all 15 projects (1 DOB NOW + 14 legacy BIS). Dated by first filing; BIS projects by first permit issuance.

Who this entity's projects were filed with. Top 25 per group by shared jobs.

Name	Projects together	Most recent
SYSKA HENNESSY GROUP	1	05/08/2020

1 DOB NOW project + 14 legacy BIS projects, anchored the same way as Buildings Worked. Status is the project's permit state today: open = at least one permit currently issued. BIS projects show their raw permit status and are not counted as open.

All 15Open permit 1Other status 14

15 projects

Project	Address	Type	Status	Filed	Latest permit	On the project	Description
B00345572 ↗	10502 AVENUE D BROOKLYN	Alteration	Permit Issued	05/08/2020	09/24/2026	Design SYSKA HENNESSY GROUP	Sprinkler work on the 1st as indicated on drawings.
302572516BIS	2974 AVENUE X BROOKLYN	—	ISSUED	05/02/2018	07/28/2025	—	SP
302571036BIS	200 LINWOOD STREET BROOKLYN	—	ISSUED	10/20/2014	01/27/2017	—	OT, PL, SP
120781163BIS	2 WEST 13 STREET MANHATTAN	—	ISSUED	06/06/2013	09/22/2016	—	PL, SP
302572259BIS	2212 BEDFORD AVENUE BROOKLYN	—	ISSUED	01/23/2015	03/14/2016	—	SP
340161256BIS	790 BROADWAY BROOKLYN	—	ISSUED	10/09/2014	02/23/2015	—	MH, PL, SP
320069260BIS	249 EAST 17 STREET BROOKLYN	—	ISSUED	04/07/2010	06/13/2014	—	MH, OT, PL, SP
520109720BIS	1321 VICTORY BOULEVARD STATEN ISLAND	—	ISSUED	03/28/2014	03/28/2014	—	SP
520089145BIS	300 RICHMOND TERRACE STATEN ISLAND	—	ISSUED	10/19/2012	02/19/2014	—	PL, SP
302131976BIS	6565 FLATLANDS AVENUE BROOKLYN	—	ISSUED	03/24/2009	11/22/2011	—	MH, OT, PL, SP
102395971BIS	MAIN STREET MANHATTAN	—	ISSUED	07/25/2008	09/30/2011	—	MH, OT, SP
320229971BIS	1810 SHORE PARKWAY BROOKLYN	—	ISSUED	04/14/2011	04/14/2011	—	SP
402359791BIS	54-25 SKILLMAN AVENUE QUEENS	—	ISSUED	02/06/2009	03/27/2011	—	OT, PL, SP
310082424BIS	204 CHESTNUT STREET BROOKLYN	—	ISSUED	01/29/2008	03/22/2009	—	SP
103879251BIS	114 WEST 46 STREET MANHATTAN	—	ISSUED	05/05/2008	05/05/2008	—	SP

Click a row for this entity's own projects, plans and documents at that building.

Building	Filings	Most Recent
10502 AVENUE D ↗	10	09/25/2026

▾Documents — 247 on file (BIS + DOB NOW)

▸Plans & Drawings1

▸DOB NOWPlans/Sketch - Sprinkler1

09/02/2026B00345572-I1 · 10502 AVENUE DRequest digital key ↗

▸Applications & Permits58

▸BISPLAN / WORK APPROVAL APPLICATION36

07/24/2017340161256 · 790 BROADWAYOpen ↗

05/25/2016320069260 · 249 EAST 17 STREETOpen ↗

02/04/2016120781163 · 2 WEST 13 STREETOpen ↗

Showing 3 of 36 on file for this type

▸BISWORK PERMIT APPLICATION22

01/22/2015340161256 · 790 BROADWAYOpen ↗

12/08/2014340161256 · 790 BROADWAYOpen ↗

03/31/2014520109720 · 1321 VICTORY BOULEVARDOpen ↗

Showing 3 of 22 on file for this type

▸Seals & Professional Certifications40

▸BISTECHNICAL REPORT: RESPONSIBILITY/CERTIFICATION31

06/27/2017520089145 · 300 RICHMOND TERRACEOpen ↗

06/10/2016320069260 · 249 EAST 17 STREETOpen ↗

01/07/2016320069260 · 249 EAST 17 STREETOpen ↗

Showing 3 of 31 on file for this type

▸BISPROFESSIONAL CERTIFICATION STATEMENT FORM4

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

Showing 0 of 4 on file for this type

▸BISPROFESSIONAL CERTIFIED CHECKLIST3

01/07/2016320069260 · 249 EAST 17 STREETOpen ↗

Showing 1 of 3 on file for this type

▸BISAPPLICANT OWNER SIGNATURE1

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

Showing 0 of 1 on file for this type

▸DOB NOWDPL-1: Design Professional Seal & Signature1

08/13/2026B00345572-I1 · 10502 AVENUE DOpen ↗

▸Trade Schedules & Equipment54

▸BISSELF-CERT PLUMBING NOTICE19

08/04/2015340161256 · 790 BROADWAYOpen ↗

04/09/2015340161256 · 790 BROADWAYOpen ↗

03/10/2015340161256 · 790 BROADWAYOpen ↗

Showing 3 of 19 on file for this type

▸BISSCHEDULE B - PLUMBING19

02/17/2015340161256 · 790 BROADWAYOpen ↗

02/03/2015340161256 · 790 BROADWAYOpen ↗

08/28/2012520109720 · 1321 VICTORY BOULEVARDOpen ↗

Showing 3 of 19 on file for this type

▸BISSPRINKLER INSP REPORT : FP-855

07/09/2014520109720 · 1321 VICTORY BOULEVARDOpen ↗

04/07/2014520089145 · 300 RICHMOND TERRACEOpen ↗

04/27/2012320229971 · 1810 SHORE PARKWAYOpen ↗

Showing 3 of 5 on file for this type

▸BISSCHEDULE B - PLUMBING/SPRINKLER/STANDPIPE3

04/23/2014520089145 · 300 RICHMOND TERRACEOpen ↗

02/24/2014520109720 · 1321 VICTORY BOULEVARDOpen ↗

Showing 2 of 3 on file for this type

▸BISPLUMBING - SUPPORTING DOCUMENTATION3

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

Showing 0 of 3 on file for this type

▸BISRPZ/DDCV TEST REPORT : GEN215B2

04/14/2014520089145 · 300 RICHMOND TERRACEOpen ↗

05/29/2009310082424 · 204 CHESTNUT STREETOpen ↗

▸BISFA - FDNY APPROVAL : FD-FAA2

04/09/2014520089145 · 300 RICHMOND TERRACEOpen ↗

Showing 1 of 2 on file for this type

▸BISWATER METER PERMIT : DEP-METER1

03/26/2014520089145 · 300 RICHMOND TERRACEOpen ↗

▸Environmental & Asbestos8

▸BISASBESTOS: CERTIFICATION (DEP ACP5)2

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

Showing 0 of 2 on file for this type

▸BISASBESTOS INSPECTION REPORT1

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

Showing 0 of 1 on file for this type

▸BISDEP ASBESTOS PROJECT COMPLETION FORM1

08/27/2012520109720 · 1321 VICTORY BOULEVARDOpen ↗

▸BISTHIS IS 'NOT AN ASBESTOS PROJECT'1

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

Showing 0 of 1 on file for this type

▸BISENVIRONMENTAL RESTRICTIONS - OER NOTICE TO PROCEED1

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

Showing 0 of 1 on file for this type

▸BISASBESTOS EXEMPTION CERTIFICATION LETTER1

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

Showing 0 of 1 on file for this type

▸DOB NOWDEP ACP-20/ACP-21: Asbestos Project Conditional Completion Form/Asbestos Project Completion Form1

08/13/2026B00345572-I1 · 10502 AVENUE DOpen ↗

▸Energy Compliance3

▸BISTECHNICAL REPORT: ENERGY CODE - RESPONSIBILITY3

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

Showing 0 of 3 on file for this type

▸Inspections & Test Reports10

▸BISHYDRO FLOW TEST LETTER4

05/02/2013520109720 · 1321 VICTORY BOULEVARDOpen ↗

07/15/2009310082424 · 204 CHESTNUT STREETOpen ↗

Showing 2 of 4 on file for this type

▸BISHYDRAULIC FLOW CALCULATIONS3

05/02/2013520109720 · 1321 VICTORY BOULEVARDOpen ↗

Showing 1 of 3 on file for this type

▸BISTECHNICAL REPORT: CONCRETE/TEST CYLINDER2

06/10/2016320069260 · 249 EAST 17 STREETOpen ↗

01/07/2016320069260 · 249 EAST 17 STREETOpen ↗

▸BISTECHNICAL REPORT: RESPONSIBILITY1

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

Showing 0 of 1 on file for this type

▸Approvals, Objections & Sign-offs21

▸BISCERTIFICATE OF OCCUPANCY/LOC: REQUEST7

06/27/2017520089145 · 300 RICHMOND TERRACEOpen ↗

01/17/2017520089145 · 300 RICHMOND TERRACEOpen ↗

06/10/2016320069260 · 249 EAST 17 STREETOpen ↗

Showing 3 of 7 on file for this type

▸BISADMINISTRATIVE OBJECTIONS6

09/23/2011120781163 · 2 WEST 13 STREETOpen ↗

Showing 1 of 6 on file for this type

▸BISLETTERS - SUPPORTING DOCUMENTATION3

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

Showing 0 of 3 on file for this type

▸BISTAP LETTER - DOM SVC : DEP-DOM2

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

Showing 0 of 2 on file for this type

▸BISTAP LETTER - FIRE SVC : DEP-FIRE1

03/26/2014520089145 · 300 RICHMOND TERRACEOpen ↗

▸DOB NOWDesign Commission Approval City Owned (Exterior Work)1

08/13/2026B00345572-I1 · 10502 AVENUE DOpen ↗

▸DOB NOWFee Exempt Supporting Document - DOF ACRIS report or BIB letter1

08/13/2026B00345572-I1 · 10502 AVENUE DOpen ↗

▸Cost, Insurance & Ownership16

▸BISCOST AFFIDAVIT16

01/17/2017520089145 · 300 RICHMOND TERRACEOpen ↗

06/10/2016320069260 · 249 EAST 17 STREETOpen ↗

Showing 3 of 16 on file for this type

▸Filing & Intake Forms27

▸BISADDITIONAL INFORMATION19

08/08/2017340161256 · 790 BROADWAYOpen ↗

08/04/2017340161256 · 790 BROADWAYOpen ↗

07/31/2017340161256 · 790 BROADWAYOpen ↗

Showing 3 of 19 on file for this type

▸BISEFILING COVER SHEET7

09/23/2011120781163 · 2 WEST 13 STREETOpen ↗

Showing 1 of 7 on file for this type

▸BISEFILING JOB APPLICATION COVER SHEET1

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

Showing 0 of 1 on file for this type

▸Other Documents9

▸BISEXTERNAL FORMS - SUPPORTING DOCUMENTATION5

07/15/2009310082424 · 204 CHESTNUT STREETOpen ↗

05/28/2009310082424 · 204 CHESTNUT STREETOpen ↗

Showing 3 of 5 on file for this type

▸BISDRY PIPE VALVE TEST : FP-102

04/07/2014520089145 · 300 RICHMOND TERRACEOpen ↗

Showing 1 of 2 on file for this type

▸BISSafety Monitoring Plan (SMP)1

04/14/2014520089145 · 300 RICHMOND TERRACEOpen ↗

▸BISBPP: WAIVER OF GRADE FILING1

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

Showing 0 of 1 on file for this type

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