← Back
Entity
Cornerstone Research
Tenant
5 projects with open permitsMANHATTAN · 8
1 building
8
Total Filings
8
Projects on File
1
Buildings Worked
5
Projects w/ Open Permits
Tenant
Primary Trade
Activity
Projects by first filing month8 projects all-time
0358Apr '22 · 1Apr '25 · 7202320242025
bars = month · line = 3-mo average
Portfolio status
Browse projects →
Open permit562%
Signed off338%
By project type
Alteration8
Most active buildings
All buildings →
599 LEXINGTON AVENUEMANHATTAN · 5 open · latest 04/21/2026
8 projects
Key relationships
Everyone →
Filing representatives
7 projects
Owners
7 projects
Most recent projects
All projects →
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M01184096 ↗599 LEXINGTON AVENUE
MANHATTAN
AlterationPermit Issued04/04/202504/21/2026
Design JFK&M CONSULTING ENGINEERS
Owner BOSTON PROPERTIES
Contractor PAR PLUMBING CO., INC
Filer A1 EXPEDITING SERVICE CORP.
Modification to existing Sprinkler System and Plumbing Fixtures as per plans filed herewith. No change in use, egress or occupancy under thi…
M01179341 ↗599 LEXINGTON AVENUE
MANHATTAN
AlterationPermit Issued04/08/202503/11/2026
Design JFK&M CONSULTING ENGINEERS
Owner BOSTON PROPERTIES
Contractor L&K PARTNERS, INC
Filer A1 EXPEDITING SERVICE CORP.
Modification to existing HVAC system as per plans filed herewith. No change in use, egress or occupancy under this application.
M01179315 ↗599 LEXINGTON AVENUE
MANHATTAN
AlterationPermit Issued04/08/202503/10/2026
Design INTERIOR ARCHITECTS
Owner BOSTON PROPERTIES
Contractor L&K PARTNERS, INC
Filer A1 EXPEDITING SERVICE CORP.
Removal and installation of interior non bearing partitions and related finishes as per plans filed herewith. No change in use, egress or oc…
M01179355 ↗599 LEXINGTON AVENUE
MANHATTAN
AlterationPermit Issued04/04/202505/20/2025
Design JFK&M CONSULTING ENGINEERS
Owner BOSTON PROPERTIES
Contractor PREFERRED SPKLR AND MECH
Filer A1 EXPEDITING SERVICE CORP.
Modification to existing Sprinkler System and Plumbing Fixtures as per plans filed herewith. No change in use, egress or occupancy under thi…
M01184057 ↗599 LEXINGTON AVENUE
MANHATTAN
AlterationSigned-off04/04/202504/30/2025
Design JFK&M CONSULTING ENGINEERS
Owner BOSTON PROPERTIES
Contractor PREFERRED SPKLR AND MECH
Filer A1 EXPEDITING SERVICE CORP.
Modification to existing Sprinkler System (Temp Loop) as per plans filed herewith. No change in use, egress or occupancy under this applicat…
M01179305 ↗599 LEXINGTON AVENUE
MANHATTAN
AlterationPermit Issued04/11/202504/17/2025
Design INTERIOR ARCHITECTS
Owner BOSTON PROPERTIES
Contractor L&K PARTNERS, INC
Filer A1 EXPEDITING SERVICE CORP.
Removal and installation of interior non bearing partitions and related finishes as per plans filed herewith. No change in use, egress or oc…
Counts cover all 8 projects (8 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
JFK&M CONSULTING ENGINEERS504/08/2025
INTERIOR ARCHITECTS204/11/2025
PERKINS&WILL ARCHITECTS, PC104/04/2022
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
L&K PARTNERS, INC404/11/2025
PREFERRED SPKLR AND MECH304/04/2025
PAR PLUMBING CO., INC204/04/2025
CLUNE CONSTRUCTION CO LP104/04/2022
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
BOSTON PROPERTIES704/11/2025
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
A1 EXPEDITING SERVICE CORP.704/11/2025
8 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 8Open permit 5Signed off 3
8 projects
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M01184096 ↗599 LEXINGTON AVENUE
MANHATTAN
AlterationPermit Issued04/04/202504/21/2026
Design JFK&M CONSULTING ENGINEERS
Owner BOSTON PROPERTIES
Contractor PAR PLUMBING CO., INC
Filer A1 EXPEDITING SERVICE CORP.
Modification to existing Sprinkler System and Plumbing Fixtures as per plans filed herewith. No change in use, egress or occupancy under thi…
M01179341 ↗599 LEXINGTON AVENUE
MANHATTAN
AlterationPermit Issued04/08/202503/11/2026
Design JFK&M CONSULTING ENGINEERS
Owner BOSTON PROPERTIES
Contractor L&K PARTNERS, INC
Filer A1 EXPEDITING SERVICE CORP.
Modification to existing HVAC system as per plans filed herewith. No change in use, egress or occupancy under this application.
M01179315 ↗599 LEXINGTON AVENUE
MANHATTAN
AlterationPermit Issued04/08/202503/10/2026
Design INTERIOR ARCHITECTS
Owner BOSTON PROPERTIES
Contractor L&K PARTNERS, INC
Filer A1 EXPEDITING SERVICE CORP.
Removal and installation of interior non bearing partitions and related finishes as per plans filed herewith. No change in use, egress or oc…
M01179355 ↗599 LEXINGTON AVENUE
MANHATTAN
AlterationPermit Issued04/04/202505/20/2025
Design JFK&M CONSULTING ENGINEERS
Owner BOSTON PROPERTIES
Contractor PREFERRED SPKLR AND MECH
Filer A1 EXPEDITING SERVICE CORP.
Modification to existing Sprinkler System and Plumbing Fixtures as per plans filed herewith. No change in use, egress or occupancy under thi…
M01184057 ↗599 LEXINGTON AVENUE
MANHATTAN
AlterationSigned-off04/04/202504/30/2025
Design JFK&M CONSULTING ENGINEERS
Owner BOSTON PROPERTIES
Contractor PREFERRED SPKLR AND MECH
Filer A1 EXPEDITING SERVICE CORP.
Modification to existing Sprinkler System (Temp Loop) as per plans filed herewith. No change in use, egress or occupancy under this applicat…
M01179305 ↗599 LEXINGTON AVENUE
MANHATTAN
AlterationPermit Issued04/11/202504/17/2025
Design INTERIOR ARCHITECTS
Owner BOSTON PROPERTIES
Contractor L&K PARTNERS, INC
Filer A1 EXPEDITING SERVICE CORP.
Removal and installation of interior non bearing partitions and related finishes as per plans filed herewith. No change in use, egress or oc…
M01179332 ↗599 LEXINGTON AVENUE
MANHATTAN
AlterationSigned-off04/04/202504/04/2025
Design JFK&M CONSULTING ENGINEERS
Owner BOSTON PROPERTIES
Contractor L&K PARTNERS, INC
Filer A1 EXPEDITING SERVICE CORP.
Modification to existing HVAC system as per plans filed herewith. No change in use, egress or occupancy under this application.
M00690021 ↗599 LEXINGTON AVENUE
MANHATTAN
AlterationSigned-off04/04/202204/12/2022
Design PERKINS&WILL ARCHITECTS, PC
Contractor CLUNE CONSTRUCTION CO LP
Removal and installation of interior non bearing partitions and related finishes (construction of new gypsum board partitions, glass parti…
Click a row for this entity's own projects, plans and documents at that building.
BuildingFilingsMost Recent
599 LEXINGTON AVENUE ↗804/11/2025
▾Documents — 34 on file (BIS + DOB NOW)
▸Plans & Drawings8
▸DOB NOWPlans/Sketch8
09/02/2026M00690021-I1 · 599 LEXINGTON AVENUERequest digital key ↗
08/24/2026M01179355-I1 · 599 LEXINGTON AVENUERequest digital key ↗
08/24/2026M01179332-I1 · 599 LEXINGTON AVENUERequest digital key ↗
Showing 3 of 8 on file for this type
▸Seals & Professional Certifications18
▸DOB NOWDPL-1: Design Professional Seal & Signature8
08/24/2026M01179355-I1 · 599 LEXINGTON AVENUEOpen ↗
08/24/2026M01179332-I1 · 599 LEXINGTON AVENUEOpen ↗
08/24/2026M01184096-I1 · 599 LEXINGTON AVENUEOpen ↗
Showing 3 of 8 on file for this type
▸DOB NOWProgress Inspector Seal & Signature6
08/26/2026M01179341-I1 · 599 LEXINGTON AVENUEOpen ↗
08/26/2026M01179341-I1 · 599 LEXINGTON AVENUEOpen ↗
08/25/2026M01179315-I1 · 599 LEXINGTON AVENUEOpen ↗
Showing 3 of 6 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature4
09/01/2026M01184096-I1 · 599 LEXINGTON AVENUEOpen ↗
08/26/2026M01179341-I1 · 599 LEXINGTON AVENUEOpen ↗
08/25/2026M01179315-I1 · 599 LEXINGTON AVENUEOpen ↗
Showing 3 of 4 on file for this type
▸Environmental & Asbestos8
▸DOB NOWDEP ACP-5: Asbestos Assessment Report8
08/24/2026M01179355-I1 · 599 LEXINGTON AVENUEOpen ↗
08/24/2026M01179332-I1 · 599 LEXINGTON AVENUEOpen ↗
08/24/2026M01184096-I1 · 599 LEXINGTON AVENUEOpen ↗
Showing 3 of 8 on file for this type