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Contractor
WILLIAM K CONSTRUCTION OF
General Contractor
7 projects with open permitsMANHATTAN · 11BROOKLYN · 1
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11 buildings
46
Total Filings
12
Projects on File
11
Buildings Worked
7
Projects w/ Open Permits
General Contractor
Primary Trade
Activity
Projects by first filing month12 projects all-time
0112Dec '21 · 1Jan '22 · 1Jun '22 · 1Jul '22 · 1Aug '22 · 1Sep '22 · 1Nov '22 · 1Apr '23 · 1May '23 · 1Jun '23 · 1Aug '23 · 1Nov '23 · 1Dec '21Mar '22Jun '22Sep '22Dec '22Mar '23Jun '23Sep '23Nov '23
bars = month · line = 3-mo average
Portfolio status
Browse projects →
Open permit758%
Signed off542%
By project type
Alteration12
Most active buildings
All buildings →
4 EAST 72 STREETMANHATTAN · 2 open · latest 04/24/2025
2 projects
147 WAVERLY PLACEMANHATTAN · latest 01/02/2024
1 projects
105 WEST 16 STREETMANHATTAN · 1 open · latest 04/27/2022
1 projects
545 WEST END AVENUEMANHATTAN · 1 open · latest 04/02/2026
1 projects
875 5 AVENUEMANHATTAN · latest 07/06/2022
1 projects
880 5 AVENUEMANHATTAN · 1 open · latest 12/30/2025
1 projects
Key relationships
Everyone →
Filing representatives
2 projects
2 projects
1 projects
1 projects
Most recent projects
All projects →
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M00659836 ↗545 WEST END AVENUE
MANHATTAN
AlterationPermit Issued01/24/202204/02/2026
Design HOWARD L ZIMMERMAN ARCH & ENG DPC
Owner Orsid NY
Filer HLZAE
FISP REPAIRS, PARAPET REPLACEMENT, LINTEL REPLACEMENT, BRICK REPLACEMENT, RAILING INSTALLATION, SAWCUTTING & POINTING AS PER PLANS. NO CHANG…
M00919062 ↗880 5 AVENUE
MANHATTAN
AlterationPermit Issued08/15/202312/30/2025
Design HOWARD L ZIMMERMAN ARCH & ENG DPC
Owner BROWN HARRIS STEVENS
Filer HLZAE
FACADE REPAIRS INCLUDING PARAPET AND TERRACE PARAPET RECONSTRUCTION, SPANDREL REPAIRS, BRICK REPLACEMENT, POINTING, CORNER REPLACEMENT, AND …
B00823955 ↗66 PIERREPONT STREET
BROOKLYN
AlterationPermit Issued05/18/202310/24/2025
Design HUGH ROBOTHAM,ARCHITECT, P.C.
Owner VIKING RESTORATION SERVICES LLC
Filer Hierarch-E LLC
suspended scaffold installation as per plans filed herewith.
M07995916 ↗4 EAST 72 STREET
MANHATTAN
AlterationPermit Issued11/16/202204/24/2025
Design LAWLESS & MANGIONE
Filer OUTSOURCE CONSULTANTS, INC.
Facade Restoration as per plans filed herewith. No change in use, egress or occupancy.
M00851494 ↗4 EAST 72 STREET
MANHATTAN
AlterationPermit Issued04/06/202301/09/2025
Design LABO DESIGN STUDIO
create two windows at eastern elevation of building. no change in use, egress or occupancy,
M00878247 ↗21 EAST 79 STREET
MANHATTAN
AlterationSigned-off06/12/202309/09/2024
Design LAWLESS & MANGIONE
Owner BROWN HARRIS STEVENS
Filer OUTSOURCE CONSULTANTS, INC.
FACADE REPAIRS AND ROOF REPLACEMENT AS PER PLANS FILED HEREWITH. NO CHANGE IN USE, EGRESS OR OCCUPANCY.
Counts cover all 12 projects (12 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
LAWLESS & MANGIONE306/12/2023
HOWARD L ZIMMERMAN ARCH & ENG DPC210/24/2025
CATALDO ENGINEERING, P.C.107/19/2022
GILSANZ MURRAY STEFICEK LLP106/07/2022
HUGH ROBOTHAM,ARCHITECT, P.C.109/16/2025
JASON M APTOWITZ CONSULTING ENGINEE112/15/2021
LABO DESIGN STUDIO104/06/2023
OSPINO ENGINEERING PLLC109/16/2025
RIMKUS NEW YORK PLLC111/21/2023
SUPERSTRUCTURES ENG. + ARCH.109/28/2022
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
WILLIAM K. CONSTRUCTION G309/30/2025
WILLIAM K RESTORATION204/06/2023
AMERICAN VENTILATION SERV109/16/2025
KNS BUILDING REST. INC109/30/2025
PRESERV BLD RESTOR MGT IN110/24/2025
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
BROWN HARRIS STEVENS210/24/2025
100 UNITED NATIONS PLAZA CONDOMINIU106/07/2022
ABS PARTNERS REAL ESTATE, LLC112/15/2021
ORSID NY109/30/2025
THE TOWERS109/28/2022
VIKING RESTORATION SERVICES LLC109/16/2025
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
HLZAE210/24/2025
OUTSOURCE CONSULTANTS, INC.206/12/2023
Hierarch-E LLC109/16/2025
J. CALLAHAN CONSULTING, INC.106/07/2022
MUNICIPAL BUILDING CONSULTANTS112/15/2021
RIMKUS NEW YORK PLLC111/21/2023
RPO INC.107/19/2022
SUPERSTRUCTURES ENG + ARCH109/28/2022
12 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 12Open permit 7Signed off 5
12 projects
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M00659836 ↗545 WEST END AVENUE
MANHATTAN
AlterationPermit Issued01/24/202204/02/2026
Design HOWARD L ZIMMERMAN ARCH & ENG DPC
Owner Orsid NY
Filer HLZAE
FISP REPAIRS, PARAPET REPLACEMENT, LINTEL REPLACEMENT, BRICK REPLACEMENT, RAILING INSTALLATION, SAWCUTTING & POINTING AS PER PLANS. NO CHANG…
M00919062 ↗880 5 AVENUE
MANHATTAN
AlterationPermit Issued08/15/202312/30/2025
Design HOWARD L ZIMMERMAN ARCH & ENG DPC
Owner BROWN HARRIS STEVENS
Filer HLZAE
FACADE REPAIRS INCLUDING PARAPET AND TERRACE PARAPET RECONSTRUCTION, SPANDREL REPAIRS, BRICK REPLACEMENT, POINTING, CORNER REPLACEMENT, AND …
B00823955 ↗66 PIERREPONT STREET
BROOKLYN
AlterationPermit Issued05/18/202310/24/2025
Design HUGH ROBOTHAM,ARCHITECT, P.C.
Owner VIKING RESTORATION SERVICES LLC
Filer Hierarch-E LLC
suspended scaffold installation as per plans filed herewith.
M07995916 ↗4 EAST 72 STREET
MANHATTAN
AlterationPermit Issued11/16/202204/24/2025
Design LAWLESS & MANGIONE
Filer OUTSOURCE CONSULTANTS, INC.
Facade Restoration as per plans filed herewith. No change in use, egress or occupancy.
M00851494 ↗4 EAST 72 STREET
MANHATTAN
AlterationPermit Issued04/06/202301/09/2025
Design LABO DESIGN STUDIO
create two windows at eastern elevation of building. no change in use, egress or occupancy,
M00878247 ↗21 EAST 79 STREET
MANHATTAN
AlterationSigned-off06/12/202309/09/2024
Design LAWLESS & MANGIONE
Owner BROWN HARRIS STEVENS
Filer OUTSOURCE CONSULTANTS, INC.
FACADE REPAIRS AND ROOF REPLACEMENT AS PER PLANS FILED HEREWITH. NO CHANGE IN USE, EGRESS OR OCCUPANCY.
M08008513 ↗401 WEST 130 STREET
MANHATTAN
AlterationSigned-off09/28/202204/11/2024
Design SUPERSTRUCTURES ENG. + ARCH.
Owner THE TOWERS
Filer SUPERSTRUCTURES ENG + ARCH
Exterior facade repairs & cleaning as per the plans filed including: Remove/replace/repair to cracked & spalled stone, masonry, expansion jo…
M00935778 ↗147 WAVERLY PLACE
MANHATTAN
AlterationSigned-off11/21/202301/02/2024
Design RIMKUS NEW YORK PLLC
Filer RIMKUS NEW YORK PLLC
Renovation of fire damaged areas on roof including replacement of low slope roofing system, partial concrete pavers, bricks & side mounted r…
M00747049 ↗60 THOMPSON STREET
MANHATTAN
AlterationSigned-off07/19/202202/06/2023
Design CATALDO ENGINEERING, P.C.
Filer RPO INC.
Facade repair including pointing, brick replacement, caulking, replacement of window lintel & installation of waterproofing & replacement of…
M00759359 ↗315 EAST 70 STREET
MANHATTAN
AlterationPermit Issued08/18/202209/18/2022
Design LAWLESS & MANGIONE
Parking Garage ramp repair as per plans filed herewith. No change in use, occupancy or egress.
M00702559 ↗875 5 AVENUE
MANHATTAN
AlterationSigned-off06/07/202207/06/2022
Design GILSANZ MURRAY STEFICEK LLP
Owner 100 UNITED NATIONS PLAZA CONDOMINIU
Filer J. CALLAHAN CONSULTING, INC.
Filing for general construction work on terrace as per plans filed of unit 17C. No change in use egress of occupancy.
M00633484 ↗105 WEST 16 STREET
MANHATTAN
AlterationPermit Issued12/15/202104/27/2022
Design JASON M APTOWITZ CONSULTING ENGINEE
Owner ABS PARTNERS REAL ESTATE
Filer MUNICIPAL BUILDING CONSULTANTS
facade repairs as per plans filed herewith. no change to use, egress or occupancy.
Click a row for this entity's own projects, plans and documents at that building.
BuildingFilingsMost Recent
147 WAVERLY PLACE ↗107/08/2026
875 5 AVENUE ↗107/08/2026
880 5 AVENUE ↗507/08/2026
60 THOMPSON STREET ↗107/08/2026
401 WEST 130 STREET ↗407/08/2026
66 PIERREPONT STREET ↗507/08/2026
545 WEST END AVENUE ↗504/08/2026
21 EAST 79 STREET ↗603/21/2026
4 EAST 72 STREET ↗903/21/2026
105 WEST 16 STREET ↗603/21/2026
315 EAST 70 STREET ↗303/21/2026
▾Documents — 105 on file (BIS + DOB NOW)
▸Plans & Drawings17
▸DOB NOWPlans/Sketch17
09/03/2026M00633484-I1 · 105 WEST 16 STREETRequest digital key ↗
09/02/2026M00702559-I1 · 875 5 AVENUERequest digital key ↗
09/02/2026M00747049-I1 · 60 THOMPSON STREETRequest digital key ↗
Showing 3 of 17 on file for this type
▸Applications & Permits11
▸DOB NOWLPC Approval/Permit11
09/02/2026M00702559-I1 · 875 5 AVENUEOpen ↗
08/13/2026M00935778-I1 · 147 WAVERLY PLACEOpen ↗
08/13/2026B00823955-S1 · 66 PIERREPONT STREETOpen ↗
Showing 3 of 11 on file for this type
▸Zoning, Tax Lot & Property Records1
▸DOB NOWRestrictive Declaration/Easement 11
08/13/2026M00851494-I1 · 4 EAST 72 STREETOpen ↗
▸Seals & Professional Certifications56
▸DOB NOWProgress Inspector Seal & Signature20
09/01/2026M00702559-I1 · 875 5 AVENUEOpen ↗
08/31/2026M00659836-P2 · 545 WEST END AVENUEOpen ↗
08/30/2026M00851494-I1 · 4 EAST 72 STREETOpen ↗
Showing 3 of 20 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature19
08/31/2026M00659836-P2 · 545 WEST END AVENUEOpen ↗
08/31/2026M00659836-P2 · 545 WEST END AVENUEOpen ↗
08/30/2026M00851494-I1 · 4 EAST 72 STREETOpen ↗
Showing 3 of 19 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature17
09/02/2026M00702559-I1 · 875 5 AVENUEOpen ↗
09/02/2026M00759359-I1 · 315 EAST 70 STREETOpen ↗
08/29/2026M00659836-P4 · 545 WEST END AVENUEOpen ↗
Showing 3 of 17 on file for this type
▸Safety & Tenant Protection2
▸DOB NOWHPD-3: Single Room Occupancy Multiple Dwelling (SRO MD) Anti-Harassment Checklist2
08/13/2026M00919062-S1 · 880 5 AVENUEOpen ↗
08/13/2026M00919062-I1 · 880 5 AVENUEOpen ↗
▸Environmental & Asbestos14
▸DOB NOWDEP ACP-5: Asbestos Assessment Report12
09/02/2026M00759359-I1 · 315 EAST 70 STREETOpen ↗
08/29/2026M00659836-P4 · 545 WEST END AVENUEOpen ↗
08/28/2026M00935778-I1 · 147 WAVERLY PLACEOpen ↗
Showing 3 of 12 on file for this type
▸DOB NOWDEP ACP-20/ACP-21: Asbestos Project Conditional Completion Form/Asbestos Project Completion Form2
09/02/2026M00702559-I1 · 875 5 AVENUEOpen ↗
08/13/2026M00633484-I1 · 105 WEST 16 STREETOpen ↗
▸Other Documents4
▸DOB NOWProof of Historic Building2
09/02/2026M00702559-I1 · 875 5 AVENUEOpen ↗
08/13/2026M07995916-I1 · 4 EAST 72 STREETOpen ↗
▸DOB NOWCalculations1
08/13/2026B00823955-S2 · 66 PIERREPONT STREETOpen ↗
▸DOB NOWManufacturer's Specifications1
08/13/2026B00823955-S2 · 66 PIERREPONT STREETOpen ↗