Back
Tenant
P.S. 23K
Tenant · filed under 2 names
BROOKLYN · 5
Want to know more? Search inside
1 building
5
Total Filings
5
Projects on File
1
Buildings Worked
0
Projects w/ Open Permits
Tenant
Primary Trade
Activity
Projects by first filing month5 projects all-time
0134Sep '22 · 1Nov '22 · 1Oct '23 · 3Sep '22Nov '22Jan '23Mar '23May '23Jul '23Sep '23Oct '23
bars = month · line = 3-mo average
Portfolio status
Browse projects →
Signed off5100%
By project type
Alteration5
Most active buildings
All buildings →
545 WILLOUGHBY AVENUEBROOKLYN · latest 03/03/2025
5 projects
Key relationships
Everyone →
Design firms
5 projects
Filing representatives
3 projects
Contractors
5 projects
Filed under
PS23k3PS23K2
Identified by the contact ids of the people who file for the firm and by its email domain, not by matching names.
Most recent projects
All projects →
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
B00917498545 WILLOUGHBY AVENUE
BROOKLYN
AlterationSigned-off10/24/202303/03/2025
Design DSENY ENGINEERING SERVICES, PC
Owner NYC SCHOOL CONSTRUCTION AUTHORITY
Contractor KEL-TECH CONSTRUCTION INC
Filer DSENY ENGINEERING SERVICES,PC
SH/PS23K - FOR TEMPORARY CONSTRUCTION EQUIPMENT(SHED) SUBMITTING ON BEHALF OF CONTRACTOR, RELATED TO JOB B08048120. NO CHANGE IN USE, OCCUPA…
B00791739545 WILLOUGHBY AVENUE
BROOKLYN
AlterationSigned-off11/08/202202/05/2025
Design DSENY ENGINEERING SERVICES, PC
Contractor KEL-TECH CONSTRUCTION INC
FN/PS23K FOR TEMPORARY CONSTRUCTION EQUIPMENT(EMERGENCY FENCE) SUBMITTING ON BEHALF OF CONTRACTOR, IN CONJUNCTION WITH LLW# 131130 NO CHANG…
B00791745545 WILLOUGHBY AVENUE
BROOKLYN
AlterationSigned-off09/28/202202/05/2025
Design DSENY ENGINEERING SERVICES, PC
Owner NYC SCHOOL CONSTRUCTION AUTHORITY
Contractor KEL-TECH CONSTRUCTION INC
Filer DSENY ENGINEERING SERVICES,PC
SH/PS23K FOR TEMPORARY CONSTRUCTION EQUIPMENT(EMERGENCY SHED) SUBMITTING ON BEHALF OF CONTRACTOR, IN CONJUNCTION WITH LLW# 131130 NO CHANGE…
B00917505545 WILLOUGHBY AVENUE
BROOKLYN
AlterationSigned-off10/24/202311/27/2024
Design DSENY ENGINEERING SERVICES, PC
Contractor KEL-TECH CONSTRUCTION INC
CH/PS23K - FOR TEMPORARY CONSTRUCTION EQUIPMENT(CHUTE) SUBMITTING ON BEHALF OF CONTRACTOR, RELATED TO JOB B08048120. NO CHANGE IN USE, OCCUP…
B00917487545 WILLOUGHBY AVENUE
BROOKLYN
AlterationSigned-off10/24/202311/26/2024
Design DSENY ENGINEERING SERVICES, PC
Owner NYC SCHOOL CONSTRUCTION AUTHORITY
Contractor KEL-TECH CONSTRUCTION INC
Filer DSENY ENGINEERING SERVICES,PC
FN/PS23K - FOR TEMPORARY CONSTRUCTION EQUIPMENT(FENCE) SUBMITTING ON BEHALF OF CONTRACTOR, RELATED TO JOB B08048120. NO CHANGE IN USE, OCCUP…
Counts cover all 5 projects (5 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
Dseny Engineering Services510/24/2023
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
Kel-Tech Construction510/24/2023
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
NYC School Construction Authority310/24/2023
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
Dseny Engineering Services310/24/2023
5 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 5Signed off 5
5 projects
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
B00917498545 WILLOUGHBY AVENUE
BROOKLYN
AlterationSigned-off10/24/202303/03/2025
Design DSENY ENGINEERING SERVICES, PC
Owner NYC SCHOOL CONSTRUCTION AUTHORITY
Contractor KEL-TECH CONSTRUCTION INC
Filer DSENY ENGINEERING SERVICES,PC
SH/PS23K - FOR TEMPORARY CONSTRUCTION EQUIPMENT(SHED) SUBMITTING ON BEHALF OF CONTRACTOR, RELATED TO JOB B08048120. NO CHANGE IN USE, OCCUPA…
B00791739545 WILLOUGHBY AVENUE
BROOKLYN
AlterationSigned-off11/08/202202/05/2025
Design DSENY ENGINEERING SERVICES, PC
Contractor KEL-TECH CONSTRUCTION INC
FN/PS23K FOR TEMPORARY CONSTRUCTION EQUIPMENT(EMERGENCY FENCE) SUBMITTING ON BEHALF OF CONTRACTOR, IN CONJUNCTION WITH LLW# 131130 NO CHANG…
B00791745545 WILLOUGHBY AVENUE
BROOKLYN
AlterationSigned-off09/28/202202/05/2025
Design DSENY ENGINEERING SERVICES, PC
Owner NYC SCHOOL CONSTRUCTION AUTHORITY
Contractor KEL-TECH CONSTRUCTION INC
Filer DSENY ENGINEERING SERVICES,PC
SH/PS23K FOR TEMPORARY CONSTRUCTION EQUIPMENT(EMERGENCY SHED) SUBMITTING ON BEHALF OF CONTRACTOR, IN CONJUNCTION WITH LLW# 131130 NO CHANGE…
B00917505545 WILLOUGHBY AVENUE
BROOKLYN
AlterationSigned-off10/24/202311/27/2024
Design DSENY ENGINEERING SERVICES, PC
Contractor KEL-TECH CONSTRUCTION INC
CH/PS23K - FOR TEMPORARY CONSTRUCTION EQUIPMENT(CHUTE) SUBMITTING ON BEHALF OF CONTRACTOR, RELATED TO JOB B08048120. NO CHANGE IN USE, OCCUP…
B00917487545 WILLOUGHBY AVENUE
BROOKLYN
AlterationSigned-off10/24/202311/26/2024
Design DSENY ENGINEERING SERVICES, PC
Owner NYC SCHOOL CONSTRUCTION AUTHORITY
Contractor KEL-TECH CONSTRUCTION INC
Filer DSENY ENGINEERING SERVICES,PC
FN/PS23K - FOR TEMPORARY CONSTRUCTION EQUIPMENT(FENCE) SUBMITTING ON BEHALF OF CONTRACTOR, RELATED TO JOB B08048120. NO CHANGE IN USE, OCCUP…
Click a row for this entity's own projects, plans and documents at that building.
BuildingFilingsMost Recent
545 WILLOUGHBY AVENUE ↗510/24/2023
▾Documents — 35 on file (BIS + DOB NOW)
▸Plans & Drawings5
▸DOB NOWPlans/Sketch5
08/28/2026B00791739-I1 · 545 WILLOUGHBY AVENUERequest digital key ↗
08/26/2026B00917498-I1 · 545 WILLOUGHBY AVENUERequest digital key ↗
08/26/2026B00917487-I1 · 545 WILLOUGHBY AVENUERequest digital key ↗
Showing 3 of 5 on file for this type
▸Seals & Professional Certifications5
▸DOB NOWDPL-1: Design Professional Seal & Signature5
08/28/2026B00791745-I1 · 545 WILLOUGHBY AVENUEOpen ↗
08/28/2026B00791739-I1 · 545 WILLOUGHBY AVENUEOpen ↗
08/26/2026B00917498-I1 · 545 WILLOUGHBY AVENUEOpen ↗
Showing 3 of 5 on file for this type
▸Safety & Tenant Protection4
▸DOB NOWNYCSCA - Approved Site Safety Plans4
08/13/2026B00791745-I1 · 545 WILLOUGHBY AVENUEOpen ↗
08/13/2026B00917498-I1 · 545 WILLOUGHBY AVENUEOpen ↗
08/13/2026B00917487-I1 · 545 WILLOUGHBY AVENUEOpen ↗
Showing 3 of 4 on file for this type
▸Approvals, Objections & Sign-offs13
▸DOB NOWFee Exempt Supporting Document - DOF ACRIS report or BIB letter5
08/28/2026B00791739-I1 · 545 WILLOUGHBY AVENUEOpen ↗
08/26/2026B00917505-I1 · 545 WILLOUGHBY AVENUEOpen ↗
08/13/2026B00791745-I1 · 545 WILLOUGHBY AVENUEOpen ↗
Showing 3 of 5 on file for this type
▸DOB NOWDesign Commission Approval City Owned (Exterior Work)5
08/13/2026B00791739-I1 · 545 WILLOUGHBY AVENUEOpen ↗
08/13/2026B00917505-I1 · 545 WILLOUGHBY AVENUEOpen ↗
08/13/2026B00791745-I1 · 545 WILLOUGHBY AVENUEOpen ↗
Showing 3 of 5 on file for this type
▸DOB NOWDesign Commission Sign Off City Owned (Exterior Work)3
08/13/2026B00917505-I1 · 545 WILLOUGHBY AVENUEOpen ↗
08/13/2026B00917487-I1 · 545 WILLOUGHBY AVENUEOpen ↗
08/13/2026B00917498-I1 · 545 WILLOUGHBY AVENUEOpen ↗
▸Other Documents8
▸DOB NOWNYCSCA - BCC Plan Examination Transmittal5
08/13/2026B00791745-I1 · 545 WILLOUGHBY AVENUEOpen ↗
08/13/2026B00917498-I1 · 545 WILLOUGHBY AVENUEOpen ↗
08/13/2026B00917487-I1 · 545 WILLOUGHBY AVENUEOpen ↗
Showing 3 of 5 on file for this type
▸DOB NOWNYCSCA Exhibit 23
08/13/2026B00917505-I1 · 545 WILLOUGHBY AVENUEOpen ↗
08/13/2026B00917487-I1 · 545 WILLOUGHBY AVENUEOpen ↗
08/13/2026B00917498-I1 · 545 WILLOUGHBY AVENUEOpen ↗