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Contractor
MILLSTONE CONSTRUCTION AS
General Contractor
12 projects with open permitsMANHATTAN · 27
12 buildings
44
Total Filings
27
Projects on File
10
Buildings Worked
12
Projects w/ Open Permits
General Contractor
Primary Trade
Activity
Projects by first filing month27 projects all-time
0123Sep '18 · 1Dec '18 · 1Feb '19 · 1Mar '19 · 1Sep '19 · 1Oct '19 · 1Feb '20 · 1Mar '20 · 2Jul '21 · 1Aug '21 · 1Nov '21 · 2Jan '22 · 2May '23 · 1Sep '23 · 1Jan '24 · 2May '24 · 1Jul '24 · 2Feb '25 · 2Oct '25 · 2May '26 · 120192020202120222023202420252026
bars = month · line = 3-mo average
Portfolio status
Browse projects →
Open permit1244%
Signed off933%
Other status622%
By project type
Alteration21
Most active buildings
All buildings →
1385 BROADWAYMANHATTAN · 2 open · latest 11/14/2025
6 projects
36 EAST 31 STREETMANHATTAN · 4 open · latest 11/29/2022
4 projects
40 WEST 25 STREETMANHATTAN · latest 10/13/2021
3 projects
450 PARK AVENUE SOUTHMANHATTAN · 1 open · latest 09/03/2024
3 projects
875 AVENUE OF THE AMERMANHATTAN · 1 open · latest 01/04/2022
2 projects
20 WEST 36 STREETMANHATTAN · latest 10/29/2019
2 projects
Key relationships
Everyone →
Design firms
Owners
Most recent projects
All projects →
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M01394949 ↗430 PARK AVENUE
MANHATTAN
AlterationSigned-off05/07/202605/13/2026Minor demolition with installation of new partitions, doors, suspended ceilings and finishes on the 17th floor (SK Capital) as per plans. N…
M01173498 ↗240 EAST 15 STREET
MANHATTAN
AlterationPermit Issued02/10/202504/01/2026
Owner Julie
Herewith filing for interior removals and renovation on the 4th floor as indicated on plans. No change in use, occupancy, or egress.
M01301258 ↗1385 BROADWAY
MANHATTAN
AlterationPermit Issued10/29/202511/14/2025Construction work on the 17th and 18th floor as indicated on drawings.
M01301271 ↗1385 BROADWAY
MANHATTAN
AlterationPermit Issued10/30/202511/14/2025Mechanical work on the 17th and 18th floor (Mamiye) as indicated on drawings.
M01173561 ↗240 EAST 15 STREET
MANHATTAN
AlterationPermit Issued02/10/202504/03/2025
Owner Julie
Herewith filing for modifications to existing mechanical systems as indicated on plans. No change in use, occupancy, or egress.
M00971155 ↗1385 BROADWAY
MANHATTAN
AlterationSigned-off01/04/202402/13/2025Remove base building ductwork and install500 pounds of additional ductwork as per plans filed. No change to use, egress, or occupancy.
Counts cover all 27 projects (21 DOB NOW + 6 legacy BIS). 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
A-SQUARED303/21/2022
DE LA GARZA ARCHITECTURE LLC305/07/2024
JACK GREEN ASSOCIATES310/30/2025
AK ENGINEERING, PC201/14/2022
ASDA ARCHITECTURE + DESIGN210/29/2025
RYAN SOAMES ENGINEERING206/04/2020
BR DESIGN ASSOCIATES LLC102/10/2025
EMTG CONSULTANTS INC109/26/2019
ENV ARCHITECTS, DPC107/12/2021
LOFFREDO BROOKS ARCHITECTS P.C.105/07/2026
NTA DESIGN GROUP, LLC101/18/2024
R.J. MCGEE ENGINEERING, PLLC105/07/2024
WALTER T. GORMAN, P.E., P.C.102/10/2025
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
A.R. EQUIPMENT LLC103/21/2022
GRUSHINSKY PIPNG & HTG IN105/07/2024
PFL MECHANICAL CORP105/07/2024
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
36 EAST 31 COMPANY301/13/2022
Julie202/10/2025
THE MOINIAN GROUP205/07/2024
430 PARK AVENUE COMPANY105/07/2026
KAUFMAN MANAGEMENT COMPANY, LLC106/04/2020
TRI HILL107/12/2021
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
EA DESIGN GROUP, INC.505/07/2024
ARCHETYPE CONSULTANTS, INC.310/30/2025
METROPOLIS GROUP INC302/10/2025
A1 EXPEDITING SERVICE CORP.202/15/2024
RIZZO GROUP105/07/2026
21 DOB NOW projects + 6 legacy BIS 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 27Open permit 12Signed off 9Other status 6
27 projects
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M01394949 ↗430 PARK AVENUE
MANHATTAN
AlterationSigned-off05/07/202605/13/2026Minor demolition with installation of new partitions, doors, suspended ceilings and finishes on the 17th floor (SK Capital) as per plans. N…
M01173498 ↗240 EAST 15 STREET
MANHATTAN
AlterationPermit Issued02/10/202504/01/2026
Owner Julie
Herewith filing for interior removals and renovation on the 4th floor as indicated on plans. No change in use, occupancy, or egress.
M01301258 ↗1385 BROADWAY
MANHATTAN
AlterationPermit Issued10/29/202511/14/2025Construction work on the 17th and 18th floor as indicated on drawings.
M01301271 ↗1385 BROADWAY
MANHATTAN
AlterationPermit Issued10/30/202511/14/2025Mechanical work on the 17th and 18th floor (Mamiye) as indicated on drawings.
M01173561 ↗240 EAST 15 STREET
MANHATTAN
AlterationPermit Issued02/10/202504/03/2025
Owner Julie
Herewith filing for modifications to existing mechanical systems as indicated on plans. No change in use, occupancy, or egress.
M00971155 ↗1385 BROADWAY
MANHATTAN
AlterationSigned-off01/04/202402/13/2025Remove base building ductwork and install500 pounds of additional ductwork as per plans filed. No change to use, egress, or occupancy.
M00991882 ↗450 PARK AVENUE SOUTH
MANHATTAN
AlterationPermit Issued05/03/202409/03/2024APPLICATION FILED FOR PLUMBING/SPRINKLER MODIFICATIONS/ADDITIONS ON THE 2ND FLOOR (SUITE 202) AS PER PLANS FILED HEREWITH. NO CHANGE IN USE,…
M01047220 ↗1385 BROADWAY
MANHATTAN
AlterationSigned-off07/02/202407/25/2024Architectural work on the 17th floor (Mamiye Brothers) as indicated on drawings. EN drawings are submitted under M01047230-I1
M01047230 ↗1385 BROADWAY
MANHATTAN
AlterationSigned-off07/03/202407/17/2024Mechanical work on the 17th floor (Mamiye Brothers) as indicated on drawings.
M00979096 ↗450 PARK AVENUE SOUTH
MANHATTAN
AlterationSigned-off01/23/202402/01/2024APPLICATION FILED FOR INTERIOR REMOVAL OF NON-LOAD BEARING PARTITIONS, CEILINGS, AND FINISHES ON THE 2ND FLOOR (SUITE 202) AS PER PLANS FILE…
M00933510 ↗1385 BROADWAY
MANHATTAN
AlterationSigned-off09/21/202310/05/2023Interior demolition of non-load bearing walls and interior general construction. No change to use, egress, or occupancy.
M00854096 ↗210 5 AVENUE
MANHATTAN
AlterationSigned-off05/09/202306/05/2023APPLICATION FILED FOR INTERIOR RENOVATION OF NON-LOAD BEARING PARTITIONS, CEILINGS, AND FINISHES ON THE 7TH FLOOR AS PER PLANS FILED HEREWIT…
M00609884 ↗36 EAST 31 STREET
MANHATTAN
AlterationPermit Issued11/17/202111/29/2022
Design A-SQUARED
APPLICATION FILED FOR INTERIOR RENOVATION OF NON-LOAD BEARING PARTITIONS, CEILINGS, AND FINISHES ON THE 3RD FLOOR AS PER PLANS FILED HEREWIT…
M00474290 ↗1 EAST 33 STREET
MANHATTAN
AlterationPermit Issued08/19/202104/27/2022
Design A-SQUARED
APPLICATION FILED FOR INTERIOR REMOVAL OF PARTITIONS, CEILINGS, FINISHES ON THE 2ND, 3RD, & 7TH FLOORS. AND INSTALLATION OF A NEW DEMISING P…
M00660802 ↗36 EAST 31 STREET
MANHATTAN
AlterationPermit Issued01/13/202201/21/2022
Design A-SQUARED
APPLICATION FILED FOR INTERIOR RENOVATION OF NON-LOAD BEARING PARTITIONS, CEILINGS, AND FINISHES ON THE 3RD FLOOR (ADA BATHROOM) AS PER PLAN…
M00660813 ↗36 EAST 31 STREET
MANHATTAN
AlterationPermit Issued01/14/202201/21/2022APPLICATION FILED FOR MECHANICAL MODIFICATIONS/ADDITIONS ON THE 3RD FLOOR (ADA BATHROOM) AS PER PLANS FILED HEREWITH. NO CHANGE TO USE, EGRE…
M00546189 ↗875 AVENUE OF THE AMER
MANHATTAN
AlterationPermit Issued07/12/202101/04/2022
Owner TRI HILL
Interior Renovation of commercial space, remove and install walls, doors, floor finishes and ceilings as per plans. No change to use, egress…
M00609886 ↗36 EAST 31 STREET
MANHATTAN
AlterationPermit Issued11/19/202111/24/2021APPLICATION FILED FOR MECHANICAL MODIFICATIONS/ADDITIONS ON THE 3RD FLOOR AS PER PLANS FILED HEREWITH. NO CHANGE TO USE, EGRESS OR OCCUPANC…
M00300893 ↗40 WEST 25 STREET
MANHATTAN
AlterationSigned-off03/06/202010/13/2021Installation of HVAC units with associated ductwork as per plans filed herewith. No change in use, egress or occupancf
123841352BIS40 WEST 25 STREET
MANHATTAN
—ISSUED03/05/202003/05/2020—OT
123858478BIS40 WEST 25 STREET
MANHATTAN
—ISSUED02/10/202002/10/2020—OT
M00243811 ↗450 PARK AVENUE SOUTH
MANHATTAN
AlterationSigned-off10/23/201911/14/2019Filing for mechanical work as per plans filed. No change in use, egress of occupancy.
M00225569 ↗326 EAST 67 STREET
MANHATTAN
AlterationPermit Issued09/26/201911/13/2019MECHANICAL WORK AT 3RD FLOOR (FATE THERAPEUTICS) AS INDICATED ON DRAWINGS.
123372466BIS20 WEST 36 STREET
MANHATTAN
—ISSUED03/21/201910/29/2019—MH, OT, PL, SP
123564785BIS20 WEST 36 STREET
MANHATTAN
—ISSUED12/20/201804/18/2019—MH, OT, PL, SP
123673499BIS902 BROADWAY
MANHATTAN
—ISSUED02/26/201903/18/2019—MH, OT, PL
123540935BIS875 AVENUE OF THE AMER
MANHATTAN
—ISSUED09/28/201811/07/2018—MH, OT, PL
Click a row for this entity's own projects, plans and documents at that building.
BuildingFilingsMost Recent
210 5 AVENUE ↗107/08/2026
1385 BROADWAY ↗1007/08/2026
450 PARK AVENUE SOUTH ↗807/08/2026
40 WEST 25 STREET ↗107/08/2026
326 EAST 67 STREET ↗107/08/2026
36 EAST 31 STREET ↗1307/08/2026
240 EAST 15 STREET ↗307/08/2026
430 PARK AVENUE ↗105/15/2026
1 EAST 33 STREET ↗303/21/2026
875 AVENUE OF THE AMER ↗303/21/2026
▾Documents — 283 on file (BIS + DOB NOW)
▸Plans & Drawings27
▸DOB NOWPlans/Sketch21
Showing 3 of 21 on file for this type
▸DOB NOWPlans/Sketch - Mechanical Systems4
Showing 3 of 4 on file for this type
▸DOB NOWPlans/Sketch - General Construction2
09/02/2026M00474290-I1 · 1 EAST 33 STREETRequest digital key ↗
09/02/2026M00474290-P1 · 1 EAST 33 STREETRequest digital key ↗
▸Applications & Permits37
▸BISPLAN / WORK APPROVAL APPLICATION17
03/24/2023123858478 · 40 WEST 25 STREETOpen ↗
03/24/2023123841352 · 40 WEST 25 STREETOpen ↗
05/05/2020123841352 · 40 WEST 25 STREETOpen ↗
Showing 3 of 17 on file for this type
▸BISWORK PERMIT APPLICATION17
03/10/2020123841352 · 40 WEST 25 STREETOpen ↗
02/10/2020123858478 · 40 WEST 25 STREETOpen ↗
10/30/2019123372466 · 20 WEST 36 STREETOpen ↗
Showing 3 of 17 on file for this type
▸DOB NOWLPC Approval/Permit3
08/13/2026M00854096-I1 · 210 5 AVENUEOpen ↗
08/13/2026M01173498-I1 · 240 EAST 15 STREETOpen ↗
08/13/2026M01173561-I1 · 240 EAST 15 STREETOpen ↗
▸Seals & Professional Certifications115
▸DOB NOWProgress Inspector Seal & Signature45
09/02/2026M00474290-P1 · 1 EAST 33 STREETOpen ↗
09/02/2026M00474290-P1 · 1 EAST 33 STREETOpen ↗
09/01/2026M00991882-I1 · 450 PARK AVENUE SOUTHOpen ↗
Showing 3 of 45 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature27
09/05/2026M00300893-I1 · 40 WEST 25 STREETOpen ↗
09/03/2026M00609886-I1 · 36 EAST 31 STREETOpen ↗
09/03/2026M00660813-I1 · 36 EAST 31 STREETOpen ↗
Showing 3 of 27 on file for this type
▸BISTECHNICAL REPORT: RESPONSIBILITY/CERTIFICATION13
02/10/2020123858478 · 40 WEST 25 STREETOpen ↗
02/10/2020123858478 · 40 WEST 25 STREETOpen ↗
02/07/2019123673499 · 902 BROADWAYOpen ↗
Showing 3 of 13 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature12
09/01/2026M00991882-I1 · 450 PARK AVENUE SOUTHOpen ↗
08/31/2026M01301271-I1 · 1385 BROADWAYOpen ↗
08/28/2026M00971155-I1 · 1385 BROADWAYOpen ↗
Showing 3 of 12 on file for this type
▸BISPROFESSIONAL CERTIFICATION STATEMENT9
02/07/2019123673499 · 902 BROADWAYOpen ↗
10/25/2018123564785 · 20 WEST 36 STREETOpen ↗
09/14/2018123540935 · 875 AVENUE OF THE AMEROpen ↗
Showing 3 of 9 on file for this type
▸BISPROFESSIONAL CERTIFIED CHECKLIST8
03/10/2020123841352 · 40 WEST 25 STREETOpen ↗
02/10/2020123858478 · 40 WEST 25 STREETOpen ↗
02/07/2019123673499 · 902 BROADWAYOpen ↗
Showing 3 of 8 on file for this type
▸BISProfessional and Owner Certification (POC3)1
02/10/2020123858478 · 40 WEST 25 STREETOpen ↗
▸Trade Schedules & Equipment7
▸BISSCHEDULE B - PLUMBING/SPRINKLER/STANDPIPE7
05/13/2019123372466 · 20 WEST 36 STREETOpen ↗
05/09/2019123372466 · 20 WEST 36 STREETOpen ↗
10/25/2018123564785 · 20 WEST 36 STREETOpen ↗
Showing 3 of 7 on file for this type
▸Safety & Tenant Protection5
▸BISTenant Protection Plan and Notes3
04/10/2019123673499 · 902 BROADWAYOpen ↗
02/07/2019123673499 · 902 BROADWAYOpen ↗
09/14/2018123540935 · 875 AVENUE OF THE AMEROpen ↗
▸DOB NOWCertificate of No Harassment2
08/13/2026M01301258-I1 · 1385 BROADWAYOpen ↗
08/13/2026M01047220-I1 · 1385 BROADWAYOpen ↗
▸Environmental & Asbestos32
▸DOB NOWDEP ACP-5: Asbestos Assessment Report26
09/05/2026M00300893-I1 · 40 WEST 25 STREETOpen ↗
09/03/2026M00609886-I1 · 36 EAST 31 STREETOpen ↗
09/03/2026M00660813-I1 · 36 EAST 31 STREETOpen ↗
Showing 3 of 26 on file for this type
▸BISASBESTOS: CERTIFICATION (DEP ACP5)4
03/10/2020123841352 · 40 WEST 25 STREETOpen ↗
02/07/2019123673499 · 902 BROADWAYOpen ↗
Showing 2 of 4 on file for this type
▸BISDEP ASBESTOS PROJECT COMPLETION FORM1
10/25/2018123564785 · 20 WEST 36 STREETOpen ↗
▸BISASBESTOS: EXEMPTION (ASB4)1
02/10/2020123858478 · 40 WEST 25 STREETOpen ↗
▸Energy Compliance14
▸BISTECHNICAL REPORT: ENERGY CODE PROGRESS INSPS8
02/10/2020123858478 · 40 WEST 25 STREETOpen ↗
03/21/2019123372466 · 20 WEST 36 STREETOpen ↗
10/25/2018123564785 · 20 WEST 36 STREETOpen ↗
Showing 3 of 8 on file for this type
▸BISTECHNICAL REPORT: ENERGY CODE - RESPONSIBILITY2
05/15/2023123841352 · 40 WEST 25 STREETOpen ↗
05/15/2023123858478 · 40 WEST 25 STREETOpen ↗
▸BISAS-BUILT ENERGY ANALYSIS (EN2)2
05/15/2023123841352 · 40 WEST 25 STREETOpen ↗
05/15/2023123858478 · 40 WEST 25 STREETOpen ↗
▸DOB NOWEN2: As Built Energy Analysis.2
08/13/2026M00243811-I1 · 450 PARK AVENUE SOUTHOpen ↗
08/13/2026M00546189-I1 · 875 AVENUE OF THE AMEROpen ↗
▸Inspections & Test Reports6
▸BISTECHNICAL REPORT: RESPONSIBILITY6
05/16/2023123841352 · 40 WEST 25 STREETOpen ↗
05/15/2023123841352 · 40 WEST 25 STREETOpen ↗
05/15/2023123841352 · 40 WEST 25 STREETOpen ↗
Showing 3 of 6 on file for this type
▸Approvals, Objections & Sign-offs6
▸BISCERTIFICATE OF OCCUPANCY/LOC: REQUEST3
05/16/2023123841352 · 40 WEST 25 STREETOpen ↗
05/15/2023123858478 · 40 WEST 25 STREETOpen ↗
08/26/2020123372466 · 20 WEST 36 STREETOpen ↗
▸BISLANDMARKS APPROVAL1
02/27/2019123673499 · 902 BROADWAYOpen ↗
▸BISSUPERSEDING LETTER1
10/30/2019123372466 · 20 WEST 36 STREETOpen ↗
▸DOB NOWFee Exempt Supporting Document - DOF ACRIS report or BIB letter1
08/13/2026M00225569-I1 · 326 EAST 67 STREETOpen ↗
▸Cost, Insurance & Ownership13
▸BISCOST AFFIDAVIT13
05/16/2023123841352 · 40 WEST 25 STREETOpen ↗
05/15/2023123841352 · 40 WEST 25 STREETOpen ↗
05/15/2023123858478 · 40 WEST 25 STREETOpen ↗
Showing 3 of 13 on file for this type
▸Filing & Intake Forms16
▸BISEFILING COVER SHEET12
02/07/2019123673499 · 902 BROADWAYOpen ↗
02/07/2019123673499 · 902 BROADWAYOpen ↗
10/25/2018123564785 · 20 WEST 36 STREETOpen ↗
Showing 3 of 12 on file for this type
▸BISADDITIONAL INFORMATION3
05/20/2020123841352 · 40 WEST 25 STREETOpen ↗
05/05/2020123841352 · 40 WEST 25 STREETOpen ↗
10/25/2019123372466 · 20 WEST 36 STREETOpen ↗
▸BISBOROUGH INTAKE FORM1
05/09/2019123372466 · 20 WEST 36 STREETOpen ↗
▸Other Documents5
▸DOB NOWProof of Historic Building3
08/13/2026M00854096-I1 · 210 5 AVENUEOpen ↗
08/13/2026M01173498-I1 · 240 EAST 15 STREETOpen ↗
08/13/2026M01173561-I1 · 240 EAST 15 STREETOpen ↗
▸BISLOFT BOARD CERTIFICATE1
02/27/2019123673499 · 902 BROADWAYOpen ↗
▸DOB NOWDHCR Document1
08/13/2026M01173561-I1 · 240 EAST 15 STREETOpen ↗