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Special Inspection Agency
WILLIAM MADDEN ENGINEER C
Special Inspection Agency
4 projects with open permitsMANHATTAN · 16BROOKLYN · 6BRONX · 6
22 buildings
50
Total Filings
28
Projects on File
22
Buildings Worked
4
Projects w/ Open Permits
Special Inspection Agency
Primary Trade
Activity
Projects by first filing month28 projects all-time
0246Sep '19 · 2Nov '19 · 2Feb '20 · 2May '20 · 1Jul '20 · 1Aug '20 · 3Oct '20 · 1Jan '21 · 1Feb '21 · 5Mar '21 · 3Jul '21 · 2Oct '21 · 2Mar '22 · 3202020212022
bars = month · line = 3-mo average
Portfolio status
Browse projects →
Open permit414%
Signed off1864%
Filed only621%
By project type
Alteration28
Most active buildings
All buildings →
365 AVENUE OF THE AMERMANHATTAN · latest 11/03/2021
3 projects
20 EAST 14 STREETMANHATTAN · latest 01/11/2024
2 projects
41 EAST 167 STREETBRONX · latest 02/23/2022
2 projects
1613 AVENUE UBROOKLYN · latest 02/18/2021
2 projects
1245 BROADWAYBROOKLYN · 1 open · latest 09/16/2024
2 projects
186 AVENUE BMANHATTAN · latest 01/09/2023
1 projects
Most recent projects
All projects →
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
B00226193 ↗1245 BROADWAY
BROOKLYN
AlterationPermit Issued02/24/202009/16/2024
Filer ADG
Removal of existing piping and installation of new piping and fixtures.
M00683311 ↗20 EAST 14 STREET
MANHATTAN
AlterationSigned-off03/11/202201/11/2024
Filer ADG
Scope of work to include plumbing work for bathroom renovation and new kitchen work.
B00226225 ↗1245 BROADWAY
BROOKLYN
AlterationSigned-off02/24/202011/09/2023The installation of a laundry exhaust fan and PTAC units.
M00690543 ↗186 AVENUE B
MANHATTAN
AlterationSigned-off03/17/202201/09/2023
Filer ADG
Scope of work to include work on mechanical system, consisted of heating systems, air conditioning systems and associated ducts and piping.
M00564434 ↗353 AVENUE OF THE AMER
MANHATTAN
AlterationPermit Issued10/06/202111/22/2022
Filer ADG
The scope of work to include Plumbing and Sprinkler renovation. No change in occupancy or egress. Amendment to reflect as-built conditions.
M00683243 ↗20 EAST 14 STREET
MANHATTAN
AlterationSigned-off03/11/202211/01/2022
Filer ADG
Scope of work to include installation of split system air conditioning unit and fans, along with associated ductwork and piping.
Counts cover all 28 projects (28 DOB NOW). 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.
NameProjects togetherMost recent
C&B CONSULTING ENGINEERS LLC2305/23/2025
YORK TOWER CONSULTING ENGINEERING303/03/2021
ADG ARCHITECTURE AND DESIGN PC102/04/2025
WILLIAM MADDEN ENGINEER109/05/2019
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
HUDSON RIVER MECH GROUP I206/24/2022
PRIME MECHANICAL CORP207/13/2021
A.A. MECHANICAL SOL INC105/18/2020
AAA TOTAL PLUMBING INC108/14/2024
AAA TOTAL PLUMBING, INC108/14/2024
ACS ENVIRONMENTAL & CONST102/16/2021
CATALYST DEVELOPMENT GROU102/04/2025
CORTLANDT CONTRACTING COR111/18/2020
DPH PLUMBING & HTG CORP103/23/2020
JAB INDUSTRIES INC110/08/2020
JCR BUILDING CORP102/04/2025
JOHN HLAD P & H CO., INC105/23/2025
L J & A CONSTRUCTION CORP103/03/2021
LAND & SHORE CREATIVE LLC103/17/2022
MCT MECHANICAL LLC101/11/2022
NEW YORK PARK PLBG&HTG CO102/04/2025
NOPHIER PLUMBING & HTG IN101/14/2022
PINNACLE PLBG & HTG CORP110/15/2020
PLUMBING & HTG DOCTOR INC102/16/2021
T & C MECHANICAL109/05/2019
TRIBESMEN GENERAL CONTRAR103/23/2023
UNIQUE MECHANICAL CORP102/24/2020
XCLUSIVE KITCHEN VENTILAT103/03/2021
ZONE MECHANICAL LLC102/04/2025
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
Church of St. Joseph307/13/2021
1314 DEVELOPMENT LLC208/14/2024
M&S CHOI LLC203/03/2021
CBJ MANAGEMENT LLC101/11/2022
CORE DEVELOPMENT GROUP LLC103/23/2020
DOS DUDES LLC103/17/2022
Esplanade 94 LLC101/14/2022
FINAST AUTOMOTIVE MANAGEMENT CORP105/23/2025
GREEN DIGITS LLC111/18/2020
Icon Realty Management, LLC102/04/2025
OZYMANDIUS REALTY110/01/2021
ST. ANGELA MERICI CHURCH104/09/2021
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
ADG402/04/2025
BLANCO DESIGN, INC.307/13/2021
PROACTIVE BUILDING SOLUTIONS203/03/2021
S&M EXPEDITING105/23/2025
28 DOB NOW 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 28Open permit 4Signed off 18Filed only 6
28 projects
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
B00226193 ↗1245 BROADWAY
BROOKLYN
AlterationPermit Issued02/24/202009/16/2024
Filer ADG
Removal of existing piping and installation of new piping and fixtures.
M00683311 ↗20 EAST 14 STREET
MANHATTAN
AlterationSigned-off03/11/202201/11/2024
Filer ADG
Scope of work to include plumbing work for bathroom renovation and new kitchen work.
B00226225 ↗1245 BROADWAY
BROOKLYN
AlterationSigned-off02/24/202011/09/2023The installation of a laundry exhaust fan and PTAC units.
M00690543 ↗186 AVENUE B
MANHATTAN
AlterationSigned-off03/17/202201/09/2023
Filer ADG
Scope of work to include work on mechanical system, consisted of heating systems, air conditioning systems and associated ducts and piping.
M00564434 ↗353 AVENUE OF THE AMER
MANHATTAN
AlterationPermit Issued10/06/202111/22/2022
Filer ADG
The scope of work to include Plumbing and Sprinkler renovation. No change in occupancy or egress. Amendment to reflect as-built conditions.
M00683243 ↗20 EAST 14 STREET
MANHATTAN
AlterationSigned-off03/11/202211/01/2022
Filer ADG
Scope of work to include installation of split system air conditioning unit and fans, along with associated ductwork and piping.
X00478031 ↗41 EAST 167 STREET
BRONX
AlterationSigned-off03/03/202102/23/2022STRUCTURAL WORK AS INDICATED ON PLANS. NO CHANGE USE OCCUPANCY OR EGRESS
X00385816 ↗2155 ST RAYMOND AVENUE
BRONX
AlterationSigned-off08/28/202001/26/2022Installation of (2) water heaters and installation of piping related to water heaters, installation of floor drains. There is no change in u…
X00385826 ↗1720 METROPOLITAN AVENUE
BRONX
AlterationSigned-off08/28/202001/26/2022Remove water heater and hot water storage tank, installation of new piping for new boilers filing under a separate application. There is no …
M00465481 ↗365 AVENUE OF THE AMER
MANHATTAN
AlterationSigned-off02/16/202111/03/2021
Contractor MATHEW WEISS
Direct replacement of toilets, lavatories @ bathrooms, relocation of janitor slop sink, replacement of (3) compartment sink for a (1) compar…
M00441752 ↗6 WEST 14 STREET
MANHATTAN
AlterationFiled — no permit on record10/01/2021—
Filer ADG
—
B00398470 ↗575A LEONARD STREET
BROOKLYN
AlterationSigned-off10/08/202009/30/2021Install split HVAC system and exhaust system throughout 2 family dwelling as per plans uploaded herewith. No change in use, egress, or occup…
M00465449 ↗365 AVENUE OF THE AMER
MANHATTAN
AlterationSigned-off02/16/202109/14/2021Installation a new cooling and heating system with the necessary duct work and air handler units to provide fresh air. There is no change in…
M00507766 ↗371 AVENUE OF THE AMER
MANHATTAN
AlterationSigned-off07/13/202109/14/2021Installation of a condenser at courtyard- There is no change in use, egress or occupancy under this applicaiton
M00524428 ↗122 WEST 26 STREET
MANHATTAN
AlterationFiled — no permit on record07/30/2021——
M00236507 ↗17 EAST 13 STREET
MANHATTAN
AlterationSigned-off11/08/201907/13/2021
Filer ADG
replace approximately 60ft of 3 gas pipe that is serving the boiler and approximately 70ft of 2 pipe servicing cooking riser located at cell…
M00266612 ↗545 WEST END AVENUE
MANHATTAN
AlterationSigned-off11/20/201906/08/2021Relocation of tubs and toilets. Installation of new sink, dishwasher, toilet, shower and lavatory. Cap water and sewer lines
B00457148 ↗450 6 AVENUE
BROOKLYN
AlterationPermit Issued02/11/202104/02/2021Remove Boiler CEL FL and Relocate 1st FL LAARS GAS Fired Boiler #MJ2V-400 as indicated on Plans to resolve open ECB Violation 32099141P.…
X00477900 ↗41 EAST 167 STREET
BRONX
AlterationSigned-off03/03/202103/18/2021MECHANICAL AND DUCTWORK AT EXISTING COMMERCIAL SPACE AS INDICATED ON PLANS. NO CHANGE TO USE OCCUPANCY OR EGRESS
X00386002 ↗918 MORRIS AVENUE
BRONX
AlterationFiled — no permit on record03/15/2021——
B00459695 ↗1613 AVENUE U
BROOKLYN
AlterationFiled — no permit on record02/18/2021——
B00459706 ↗1613 AVENUE U
BROOKLYN
AlterationFiled — no permit on record02/18/2021——
M00448414 ↗365 AVENUE OF THE AMER
MANHATTAN
AlterationSigned-off01/22/202102/02/2021Reinforcement of existing girders and replacement of wood columns for steel columns with reinforcement of footing. This application is in re…
M00364737 ↗217 EAST 5 STREET
MANHATTAN
AlterationSigned-off07/24/202010/30/2020Installation of HVAC system to provide cooling to the dwelling. There is no change in use, egress or occupancy under this application
M00342711 ↗245 PARK AVENUE
MANHATTAN
AlterationSigned-off05/18/202010/01/2020
Filer ADG
Reconfiguration of ductwork.
M00359848 ↗32 WEST 25 STREET
MANHATTAN
AlterationFiled — no permit on record08/17/2020———
M00219528 ↗1001 PARK AVENUE
MANHATTAN
AlterationPermit Issued09/09/201911/27/2019Relocation of kitchen and laundry room and installation of new half bathroom, modification of existing bathrooms with direct replacement. of…
X00269528 ↗545 UNDERHILL AVENUE
BRONX
AlterationSigned-off09/05/201909/30/2019
Contractor T & C MECHANICAL
Legalization of a (3) piece bathroom at basement level and capping of gas line and removal of stove.
Click a row for this entity's own projects, plans and documents at that building.
BuildingFilingsMost Recent
353 AVENUE OF THE AMER ↗802/04/2025
20 EAST 14 STREET ↗304/16/2024
2155 ST RAYMOND AVENUE ↗306/24/2022
186 AVENUE B ↗103/17/2022
545 WEST END AVENUE ↗101/14/2022
17 EAST 13 STREET ↗401/11/2022
6 WEST 14 STREET ↗110/01/2021
1720 METROPOLITAN AVENUE ↗209/22/2021
122 WEST 26 STREET ↗107/30/2021
371 AVENUE OF THE AMER ↗107/13/2021
918 MORRIS AVENUE ↗204/09/2021
41 EAST 167 STREET ↗203/03/2021
1613 AVENUE U ↗202/18/2021
365 AVENUE OF THE AMER ↗402/16/2021
450 6 AVENUE ↗102/11/2021
217 EAST 5 STREET ↗211/18/2020
1245 BROADWAY ↗310/15/2020
575A LEONARD STREET ↗110/08/2020
32 WEST 25 STREET ↗108/17/2020
245 PARK AVENUE ↗105/18/2020
1001 PARK AVENUE ↗503/23/2020
545 UNDERHILL AVENUE ↗109/05/2019
▾Special Inspection Requirements — 94
DateRequirementBuildingInspectorRole
02/13/2025Sprinkler Systems353 AVENUE OF THE AMERMichael Risbergsspecial
02/13/2025Fire-Resistant Penetrations and Joints353 AVENUE OF THE AMERWILLIAM MADDENspecial
01/30/2025Sprinkler Systems353 AVENUE OF THE AMERMichael Risbergsspecial
01/30/2025Fire-Resistant Penetrations and Joints353 AVENUE OF THE AMERWILLIAM MADDENspecial
04/15/2024Fire-Resistant Penetrations and Joints20 EAST 14 STREETWILLIAM MADDENspecial
04/15/2024Sprinkler Systems20 EAST 14 STREETMichael Risbergsspecial
03/16/2023Fire-Resistant Penetrations and Joints20 EAST 14 STREETMichael Risbergsspecial
03/16/2023Mechanical Systems20 EAST 14 STREETWILLIAM MADDENspecial
03/16/2023Final20 EAST 14 STREETWILLIAM MADDENprogress
03/15/2023Sprinkler Systems20 EAST 14 STREETMichael Risbergsspecial
03/15/2023Fire-Resistant Penetrations and Joints20 EAST 14 STREETWILLIAM MADDENspecial
12/12/2022Sprinkler Systems353 AVENUE OF THE AMERMichael Risbergsspecial
12/12/2022Fire-Resistant Penetrations and Joints353 AVENUE OF THE AMERWILLIAM MADDENspecial
07/15/2022Mechanical Systems353 AVENUE OF THE AMERWILLIAM MADDENspecial
07/15/2022Fire-Resistant Penetrations and Joints353 AVENUE OF THE AMERWILLIAM MADDENspecial
07/15/2022Final353 AVENUE OF THE AMERWILLIAM MADDENprogress
06/29/2022Final353 AVENUE OF THE AMERWILLIAM MADDENprogress
06/29/2022Mechanical Systems353 AVENUE OF THE AMERWILLIAM MADDENspecial
06/29/2022Fire-Resistant Penetrations and Joints353 AVENUE OF THE AMERWILLIAM MADDENspecial
06/28/2022Fire-Resistant Penetrations and Joints2155 ST RAYMOND AVENUEWILLIAM MADDENspecial
06/28/2022Energy Code Compliance Inspections2155 ST RAYMOND AVENUEWILLIAM MADDENprogress
06/16/2022Fire-Resistant Penetrations and Joints2155 ST RAYMOND AVENUEWILLIAM MADDENspecial
06/16/2022Energy Code Compliance Inspections2155 ST RAYMOND AVENUEWILLIAM MADDENprogress
03/07/2022Fire-Resistant Penetrations and Joints186 AVENUE BWILLIAM MADDENspecial
03/02/2022Mechanical Systems186 AVENUE BWILLIAM MADDENspecial
03/02/2022Final186 AVENUE BWILLIAM MADDENprogress
01/03/2022Fire-Resistant Penetrations and Joints17 EAST 13 STREETWILLIAM MADDENspecial
12/06/2021Fire-Resistant Penetrations and Joints17 EAST 13 STREETWILLIAM MADDENspecial
11/17/2021Fire-Resistant Penetrations and Joints545 WEST END AVENUEWILLIAM MADDENspecial
09/23/2021Energy Code Compliance Inspections1720 METROPOLITAN AVENUEWILLIAM MADDENprogress
09/23/2021Fire-Resistant Penetrations and Joints1720 METROPOLITAN AVENUEWILLIAM MADDENspecial
09/20/2021Energy Code Compliance Inspections1720 METROPOLITAN AVENUEWILLIAM MADDENprogress
09/20/2021Fire-Resistant Penetrations and Joints1720 METROPOLITAN AVENUEWILLIAM MADDENspecial
06/17/2021Fire-Resistant Penetrations and Joints17 EAST 13 STREETWILLIAM MADDENspecial
06/02/2021Fire-Resistant Penetrations and Joints122 WEST 26 STREETWILLIAM MADDENspecial
06/02/2021Mechanical Systems122 WEST 26 STREETWILLIAM MADDENspecial
05/18/2021Final122 WEST 26 STREETWILLIAM MADDENprogress
04/21/2021Final371 AVENUE OF THE AMERWILLIAM MADDENprogress
04/21/2021Mechanical Systems371 AVENUE OF THE AMERWILLIAM MADDENspecial
04/14/2021Fire-Resistant Penetrations and Joints918 MORRIS AVENUEWILLIAM MADDENspecial
04/14/2021Energy Code Compliance Inspections918 MORRIS AVENUEWILLIAM MADDENprogress
04/14/2021HVAC insulation and sealing 918 MORRIS AVENUEWILLIAM MADDENenergy_progress
03/29/2021HVAC insulation and sealing 918 MORRIS AVENUEWILLIAM MADDENenergy_progress
03/29/2021Energy Code Compliance Inspections918 MORRIS AVENUEWILLIAM MADDENprogress
03/29/2021Fire-Resistant Penetrations and Joints918 MORRIS AVENUEWILLIAM MADDENspecial
03/03/2021Concrete - Cast-In-Place41 EAST 167 STREETWILLIAM MADDENspecial
03/01/2021Mechanical Systems41 EAST 167 STREETWILLIAM MADDENspecial
03/01/2021Final41 EAST 167 STREETJAMES BROWNprogress
03/01/2021Final41 EAST 167 STREETJAMES BROWNprogress
02/16/2021Final365 AVENUE OF THE AMERWILLIAM MADDENprogress
Latest 50 of 94.
▾Documents — 345 on file (BIS + DOB NOW)
▸Plans & Drawings67
▸DOB NOWPlans/Sketch25
Showing 3 of 25 on file for this type
▸DOB NOWPlans/Sketch - Plumbing24
09/05/2026M00219528-S1 · 1001 PARK AVENUERequest digital key ↗
Showing 3 of 24 on file for this type
▸DOB NOWPlans/Sketch - Mechanical Systems14
09/05/2026M00219528-I1 · 1001 PARK AVENUERequest digital key ↗
Showing 3 of 14 on file for this type
▸DOB NOWPlans/Sketch - Structural2
▸DOB NOWPlans/Sketch - Boiler Equipment1
08/21/2026B00457148-I1 · 450 6 AVENUERequest digital key ↗
▸DOB NOWPlans/Sketch - Plumbing Legalization1
▸Applications & Permits25
▸DOB NOWLPC Approval/Permit25
09/04/2026M00364737-P1 · 217 EAST 5 STREETOpen ↗
09/04/2026M00364737-I1 · 217 EAST 5 STREETOpen ↗
09/04/2026M00465449-I1 · 365 AVENUE OF THE AMEROpen ↗
Showing 3 of 25 on file for this type
▸Seals & Professional Certifications167
▸DOB NOWSpecial Inspector Seal & Signature66
09/29/2026B00226193-I1 · 1245 BROADWAYOpen ↗
09/02/2026X00385826-P1 · 1720 METROPOLITAN AVENUEOpen ↗
09/01/2026M00441752-I1 · 6 WEST 14 STREETOpen ↗
Showing 3 of 66 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature62
09/05/2026M00219528-I1 · 1001 PARK AVENUEOpen ↗
09/05/2026M00219528-S1 · 1001 PARK AVENUEOpen ↗
09/05/2026M00219528-P1 · 1001 PARK AVENUEOpen ↗
Showing 3 of 62 on file for this type
▸DOB NOWProgress Inspector Seal & Signature39
09/02/2026X00385826-P1 · 1720 METROPOLITAN AVENUEOpen ↗
09/01/2026M00441752-I1 · 6 WEST 14 STREETOpen ↗
09/01/2026X00385816-I1 · 2155 ST RAYMOND AVENUEOpen ↗
Showing 3 of 39 on file for this type
▸Safety & Tenant Protection19
▸DOB NOWTenant Protection Plan19
09/04/2026M00364737-P1 · 217 EAST 5 STREETOpen ↗
09/04/2026M00364737-I1 · 217 EAST 5 STREETOpen ↗
09/03/2026M00441752-P1 · 6 WEST 14 STREETOpen ↗
Showing 3 of 19 on file for this type
▸Environmental & Asbestos49
▸DOB NOWDEP ACP-5: Asbestos Assessment Report41
09/04/2026M00364737-I1 · 217 EAST 5 STREETOpen ↗
09/04/2026M00364737-P1 · 217 EAST 5 STREETOpen ↗
09/03/2026M00236507-P1 · 17 EAST 13 STREETOpen ↗
Showing 3 of 41 on file for this type
▸DOB NOWDEP ACP-20/ACP-21: Asbestos Project Conditional Completion Form/Asbestos Project Completion Form5
09/05/2026M00219528-S1 · 1001 PARK AVENUEOpen ↗
09/05/2026M00219528-I1 · 1001 PARK AVENUEOpen ↗
08/25/2026X00385826-I1 · 1720 METROPOLITAN AVENUEOpen ↗
Showing 3 of 5 on file for this type
▸DOB NOWOER: Notice to Proceed2
08/13/2026X00478031-I1 · 41 EAST 167 STREETOpen ↗
08/13/2026X00477900-I1 · 41 EAST 167 STREETOpen ↗
▸DOB NOWOER: Notice of Satisfaction1
08/13/2026X00478031-I1 · 41 EAST 167 STREETOpen ↗
▸Energy Compliance4
▸DOB NOWEN2: As Built Energy Analysis.4
09/04/2026M00465449-I1 · 365 AVENUE OF THE AMEROpen ↗
08/13/2026B00398470-I1 · 575A LEONARD STREETOpen ↗
08/13/2026X00477900-I1 · 41 EAST 167 STREETOpen ↗
Showing 3 of 4 on file for this type
▸Approvals, Objections & Sign-offs12
▸DOB NOWFee Exempt Supporting Document - DOF ACRIS report or BIB letter12
09/04/2026M00465449-I1 · 365 AVENUE OF THE AMEROpen ↗
08/25/2026X00386002-I1 · 918 MORRIS AVENUEOpen ↗
08/13/2026X00385826-I1 · 1720 METROPOLITAN AVENUEOpen ↗
Showing 3 of 12 on file for this type
▸Other Documents2
▸DOB NOWFee Exempt Supporting Document - DOF Property Tax Assessment2
09/01/2026X00385826-I1 · 1720 METROPOLITAN AVENUEOpen ↗
09/01/2026M00448414-I1 · 365 AVENUE OF THE AMEROpen ↗