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425 W 121st St. & School of Social Work
Tenant
2 projects with open permitsMANHATTAN · 10
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1 building
10
Total Filings
10
Projects on File
1
Buildings Worked
2
Projects w/ Open Permits
Tenant
Primary Trade
Activity
Projects by first filing month10 projects all-time
0134Jan '21 · 1Feb '21 · 1Jun '23 · 1Sep '23 · 2Jan '25 · 3Oct '25 · 1Feb '26 · 1202120222023202420252026
bars = month · line = 3-mo average
Portfolio status
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Open permit220%
Signed off550%
Filed only330%
By project type
Alteration10
Most active buildings
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425 WEST 121ST STREETMANHATTAN · 2 open · latest 10/01/2026
10 projects
Key relationships
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Design firms
6 projects
1 projects
1 projects
1 projects
Filing representatives
4 projects
1 projects
1 projects
1 projects
Contractors
3 projects
2 projects
1 projects
1 projects
Most recent projects
All projects →
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M01264941425 WEST 121ST STREET
MANHATTAN
AlterationPermit Issued10/31/202510/01/2026
Design KMA DESIGNS LLC
Owner COLUMBIA UNIVERSITY
Contractor KINGS GROUP NY CORP
Filer KMA DESIGNS LLC
installation of heavy duty sidewalk shed. no change in use, occupancy or egress. all work to comply with chapter 33 of nycbc
M01352538425 WEST 121ST STREET
MANHATTAN
AlterationPermit Issued02/18/202604/06/2026
Design GEORGE J. XERAKIAS, PE
Owner COLUMBIA UNIVERSITY
Contractor NEW ROC CONTRACTING CORP
Filer HS DESIGN STUDIO LLC
INSTALLATION OF TEMPORARY SUSPENDED SCAFFOLD EQUIPMENT.
M01154278425 WEST 121ST STREET
MANHATTAN
AlterationFiled — no permit on record01/09/2025—
Design EES
Owner COLUMBIA RESIDENTIAL
Filer ENVIRONMENTAL ENGINEERING SOLUTIONS
—
M01154297425 WEST 121ST STREET
MANHATTAN
AlterationFiled — no permit on record01/09/2025—
Design EES
—
M01154302425 WEST 121ST STREET
MANHATTAN
AlterationFiled — no permit on record01/09/2025—
Design EES
—
M00933609425 WEST 121ST STREET
MANHATTAN
AlterationSigned-off09/22/202310/27/2023
Design EES
Owner COLUMBIA UNIVERSITY FACILITIES
Contractor CHAMPION COMBUSTION CORP
Filer ENVIRONMENTAL ENGINEERING SOLUTIONS
Legalization of (1) York Paraflow Chiller
Counts cover all 10 projects (10 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
EES601/09/2025
AKF Engineers101/12/2021
George J. Xerakias, PE102/18/2026
Hoffmann Architects104/13/2026
Kma Designs104/13/2026
Urban Integrations102/11/2021
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
Champion Combustion309/22/2023
New Roc Contracting204/13/2026
All Boro Tank Testing101/12/2021
Kings Group NY104/13/2026
Spring Scaffolding102/11/2021
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
Columbia University304/13/2026
Columbia University Facilities309/22/2023
Columbia Residential101/09/2025
Spring Scaffolding102/11/2021
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
Environmental Engineering Solutions401/09/2025
Brookbridge Consultant Servies104/13/2026
HS Design Studio102/18/2026
Kma Designs104/13/2026
United Safety Consultants102/11/2021
10 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 10Open permit 2Signed off 5Filed only 3
10 projects
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M01264941425 WEST 121ST STREET
MANHATTAN
AlterationPermit Issued10/31/202510/01/2026
Design KMA DESIGNS LLC
Owner COLUMBIA UNIVERSITY
Contractor KINGS GROUP NY CORP
Filer KMA DESIGNS LLC
installation of heavy duty sidewalk shed. no change in use, occupancy or egress. all work to comply with chapter 33 of nycbc
M01352538425 WEST 121ST STREET
MANHATTAN
AlterationPermit Issued02/18/202604/06/2026
Design GEORGE J. XERAKIAS, PE
Owner COLUMBIA UNIVERSITY
Contractor NEW ROC CONTRACTING CORP
Filer HS DESIGN STUDIO LLC
INSTALLATION OF TEMPORARY SUSPENDED SCAFFOLD EQUIPMENT.
M01154278425 WEST 121ST STREET
MANHATTAN
AlterationFiled — no permit on record01/09/2025—
Design EES
Owner COLUMBIA RESIDENTIAL
Filer ENVIRONMENTAL ENGINEERING SOLUTIONS
—
M01154297425 WEST 121ST STREET
MANHATTAN
AlterationFiled — no permit on record01/09/2025—
Design EES
—
M01154302425 WEST 121ST STREET
MANHATTAN
AlterationFiled — no permit on record01/09/2025—
Design EES
—
M00933609425 WEST 121ST STREET
MANHATTAN
AlterationSigned-off09/22/202310/27/2023
Design EES
Owner COLUMBIA UNIVERSITY FACILITIES
Contractor CHAMPION COMBUSTION CORP
Filer ENVIRONMENTAL ENGINEERING SOLUTIONS
Legalization of (1) York Paraflow Chiller
M00842400425 WEST 121ST STREET
MANHATTAN
AlterationSigned-off06/02/202310/17/2023
Design EES
Owner COLUMBIA UNIVERSITY FACILITIES
Contractor CHAMPION COMBUSTION CORP
Filer ENVIRONMENTAL ENGINEERING SOLUTIONS
THIS APPLICATION IS FILED TO LEGALIZE THE EXISTING CLEAVER BROOKS BOILER [167218]
M00930063425 WEST 121ST STREET
MANHATTAN
AlterationSigned-off09/13/202310/17/2023
Design EES
Owner COLUMBIA UNIVERSITY FACILITIES
Contractor CHAMPION COMBUSTION CORP
Filer ENVIRONMENTAL ENGINEERING SOLUTIONS
Legalization of one existing emergency generator
M00467773425 WEST 121ST STREET
MANHATTAN
AlterationSigned-off02/11/202102/16/2023
Design URBAN INTEGRATIONS
Owner SPRING SCAFFOLDING LLC
Contractor SPRING SCAFFOLDING LLC
Filer UNITED SAFETY CONSULTANTS
sidewalk shed installed per plans, no change in use, egress or occupancy
M00322710425 WEST 121ST STREET
MANHATTAN
AlterationSigned-off01/12/202108/31/2021
Design AKF ENGINEERS, LLP
Owner COLUMBIA UNIVERSITY
Contractor AMERICAN BOILER & WELDING
Filer ENVIRONMENTAL ENGINEERING SOLUTIONS
THIS APPLICATION IS FILED TO UPGRADE ALL ASSOCIATED PUMP SETS SUPPLY LINE CONNECTING THE FUEL OIL LINE TO THE SOURCES AND TANKS
Click a row for this entity's own projects, plans and documents at that building.
BuildingFilingsMost Recent
425 WEST 121ST STREET ↗1004/13/2026
▾Documents — 40 on file (BIS + DOB NOW)
▸Plans & Drawings9
▸DOB NOWPlans/Sketch7
08/29/2026M00930063-I1 · 425 WEST 121ST STREETRequest digital key ↗
08/25/2026M01154278-I1 · 425 WEST 121ST STREETRequest digital key ↗
08/25/2026M01154302-I1 · 425 WEST 121ST STREETRequest digital key ↗
Showing 3 of 7 on file for this type
▸DOB NOWPlans/Sketch - Boiler Equipment1
09/04/2026M00322710-I1 · 425 WEST 121ST STREETRequest digital key ↗
▸DOB NOWPlans/Sketch - Sidewalk Shed1
09/04/2026M00467773-I1 · 425 WEST 121ST STREETRequest digital key ↗
▸Seals & Professional Certifications19
▸DOB NOWDPL-1: Design Professional Seal & Signature10
09/04/2026M00322710-I1 · 425 WEST 121ST STREETOpen ↗
09/04/2026M00467773-I1 · 425 WEST 121ST STREETOpen ↗
08/29/2026M00930063-I1 · 425 WEST 121ST STREETOpen ↗
Showing 3 of 10 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature6
09/23/2026M00322710-I1 · 425 WEST 121ST STREETOpen ↗
09/23/2026M00322710-I1 · 425 WEST 121ST STREETOpen ↗
09/23/2026M00842400-I1 · 425 WEST 121ST STREETOpen ↗
Showing 3 of 6 on file for this type
▸DOB NOWProgress Inspector Seal & Signature3
09/23/2026M00842400-I1 · 425 WEST 121ST STREETOpen ↗
09/01/2026M00930063-I1 · 425 WEST 121ST STREETOpen ↗
08/25/2026M00933609-I1 · 425 WEST 121ST STREETOpen ↗
▸Environmental & Asbestos4
▸DOB NOWDEP ACP-5: Asbestos Assessment Report4
08/25/2026M01154278-I1 · 425 WEST 121ST STREETOpen ↗
08/21/2026M01264941-I1 · 425 WEST 121ST STREETOpen ↗
08/13/2026M01154302-I1 · 425 WEST 121ST STREETOpen ↗
Showing 3 of 4 on file for this type
▸Approvals, Objections & Sign-offs5
▸DOB NOWFee Exempt Supporting Document - DOF ACRIS report or BIB letter5
09/04/2026M00322710-I1 · 425 WEST 121ST STREETOpen ↗
08/13/2026M01264941-I1 · 425 WEST 121ST STREETOpen ↗
08/13/2026M01264941-S1 · 425 WEST 121ST STREETOpen ↗
Showing 3 of 5 on file for this type
▸Other Documents3
▸DOB NOWCalculations1
08/13/2026M01352538-I1 · 425 WEST 121ST STREETOpen ↗
▸DOB NOWFee Exempt Supporting Document - DOF Property Tax Assessment Roll1
08/13/2026M00933609-I1 · 425 WEST 121ST STREETOpen ↗
▸DOB NOWManufacturer's Specifications1
08/13/2026M01352538-I1 · 425 WEST 121ST STREETOpen ↗