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Design Firm
GERRARD + TAN ARCHITECTS
Design
4 projects with open permitsMANHATTAN · 15BROOKLYN · 4QUEENS · 3
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15 buildings
40
Total Filings
22
Projects on File
15
Buildings Worked
4
Projects w/ Open Permits
Design
Role
Activity
Projects by first filing month22 projects all-time
0134Nov '19 · 1Feb '20 · 1Sep '20 · 1Mar '21 · 1Nov '22 · 3Apr '23 · 1May '23 · 1Jun '23 · 2Jul '23 · 2Aug '23 · 1Jan '24 · 1Mar '24 · 1May '24 · 2May '25 · 1Nov '25 · 1Feb '26 · 1Aug '26 · 12020202120222023202420252026
bars = month · line = 3-mo average
Portfolio status
Browse projects →
Open permit418%
Signed off732%
Filed only1150%
By project type
Alteration14
Alteration CO7
ALT-CO - New Building with Existing Elements to Remain1
Most active buildings
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306 WEST 56 STREETMANHATTAN · latest 08/30/2023
3 projects
210 EAST 5 STREETMANHATTAN · latest 07/03/2025
3 projects
45 EAST BROADWAYMANHATTAN · latest 05/17/2023
2 projects
112 WEST 14 STREETMANHATTAN · 2 open · latest 07/02/2024
2 projects
38-01 23 AVENUEQUEENS · latest 11/02/2022
2 projects
84 WALKER STREETMANHATTAN · latest 12/20/2022
1 projects
Key relationships
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Design firms
1 projects
1 projects
People
All people →
Robert Tanlatest 01/22/2026
28 filings
Filed under
GERRARD + TAN ARCHITECTS40
Identified by the contact ids of the people who file for the firm and by its email domain (gerrardtan.com), not by matching names.
Most recent projects
All projects →
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
Q01261024 ↗16-60 STEPHEN STREET
QUEENS
Alteration COFiled — no permit on record08/07/2026—
Filer J. CALLAHAN CONSULTING, INC.
—
M01315980 ↗413 WEST BROADWAY
MANHATTAN
AlterationSigned-off02/23/202605/29/2026
Contractor A&H EXPRESS PLBG&HTG CORP
INSTALL GAS-FIRED BOILER AT 6TH FLOOR. FILED IN CONJUNCTION WITH ALT. TYPE 1 NO. 101508619. NO CHANGE TO USE, OCCUPANCY OR EGRESS UNDER THIS…
M00889646 ↗26 BOND STREET
MANHATTAN
AlterationSigned-off01/04/202411/19/2025
Contractor DEMAR MECHANICAL INC
Filer J. CALLAHAN CONSULTING, INC.
PLUMBING FOR UNIT 12, 2R,3 &,4 CHANGE OF USE FILED UNDER 100499925. Application to replace 123094659.
M01106865 ↗151 SPRING STREET
MANHATTAN
ALT-CO - New Building with Existing Elements to RemainFiled — no permit on record11/04/2025———
M01051260 ↗210 EAST 5 STREET
MANHATTAN
AlterationSigned-off05/16/202407/03/2025
Contractor SILVERLINING INTERIORS
Filer JM ZONING, LLC.
FILING HEREWITH INTERIOR RENOVATION OF EXISTING APARTMENT AS PER PLANS. NO CHANGE IN USE, EGRESS OR OCCUPANCY.
M01053906 ↗145 GRAND STREET
MANHATTAN
Alteration COFiled — no permit on record05/14/2025———
Counts cover all 22 projects (22 DOB NOW). Dated by first filing; BIS projects by first permit issuance.
Every person filing for this firm, identified by their DOB NOW contact id (one id is one person). A person is listed under the firm they file for most.
PersonFilingsMost recent
Robert Tan2801/22/2026
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
CNY ENGINEERING P.C108/05/2026
KMB DESIGN GROUP, LLC101/29/2026
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
SILVERLINING INTERIORS212/06/2025
5 BORO'S PLUMBING INC110/27/2023
CAVAN BUILDERS CORP101/29/2026
COD PLUMBING CORP101/29/2026
DEMAR MECHANICAL INC101/29/2026
DEPENDABLE MECH CORP102/23/2026
DYNAMIC PLBG & SPRKLR COR105/07/2025
G.B. & SON, INC102/20/2020
H&M CONTRACTORS INC109/24/2020
JAN ARTISANAL CONCEPT *103/13/2024
T.PERICIC CONSTRUCTION*106/16/2023
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
DOUGLAS ELLIMAN PROPERTY MANAGEMENT303/13/2024
QUON DUNN CORP.205/17/2023
23RD AVENUE REALTY111/02/2022
330 ELLERY INC.108/05/2026
ALLIAH MANAGEMENT LLC105/07/2025
CHARLES H. GREENTHAL104/27/2023
ESRT101/29/2026
L3 CAPITAL LLC101/29/2026
NY CHINESE BAPTIST CHURCH110/27/2023
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
CONVERSANO ASSOCIATES, INC.401/29/2026
J. CALLAHAN CONSULTING, INC.408/07/2026
4444 PPPP CORP108/05/2026
A1 EXPEDITING SERVICE CORP.105/07/2025
CNY ENGINEERING PC108/05/2026
JM ZONING, LLC.112/06/2025
RIZZO GROUP101/29/2026
22 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 22Open permit 4Signed off 7Filed only 11
Any typeAlteration 14Alteration CO 7ALT-CO - New Building with Existing Elements to Remain 1
22 projects
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
Q01261024 ↗16-60 STEPHEN STREET
QUEENS
Alteration COFiled — no permit on record08/07/2026—
Filer J. CALLAHAN CONSULTING, INC.
—
M01315980 ↗413 WEST BROADWAY
MANHATTAN
AlterationSigned-off02/23/202605/29/2026
Contractor A&H EXPRESS PLBG&HTG CORP
INSTALL GAS-FIRED BOILER AT 6TH FLOOR. FILED IN CONJUNCTION WITH ALT. TYPE 1 NO. 101508619. NO CHANGE TO USE, OCCUPANCY OR EGRESS UNDER THIS…
M00889646 ↗26 BOND STREET
MANHATTAN
AlterationSigned-off01/04/202411/19/2025
Contractor DEMAR MECHANICAL INC
Filer J. CALLAHAN CONSULTING, INC.
PLUMBING FOR UNIT 12, 2R,3 &,4 CHANGE OF USE FILED UNDER 100499925. Application to replace 123094659.
M01106865 ↗151 SPRING STREET
MANHATTAN
ALT-CO - New Building with Existing Elements to RemainFiled — no permit on record11/04/2025———
M01051260 ↗210 EAST 5 STREET
MANHATTAN
AlterationSigned-off05/16/202407/03/2025
Contractor SILVERLINING INTERIORS
Filer JM ZONING, LLC.
FILING HEREWITH INTERIOR RENOVATION OF EXISTING APARTMENT AS PER PLANS. NO CHANGE IN USE, EGRESS OR OCCUPANCY.
M01053906 ↗145 GRAND STREET
MANHATTAN
Alteration COFiled — no permit on record05/14/2025———
M01009635 ↗210 EAST 5 STREET
MANHATTAN
AlterationSigned-off03/06/202402/21/2025
Contractor SILVERLINING INTERIORS
Filer JM ZONING, LLC.
REMOVAL OF NON-STRUCTURAL INTERIOR PARTITIONS AND CEILING FINISHES, SOUND ATTENUATION BLANKETS, INSULATION, NOTED DOORS, AND CONVENIENCE STA…
B00311720 ↗127 GREEN STREET
BROOKLYN
AlterationPermit Issued02/20/202008/22/2024
Contractor G.B. & SON, INC
Propose plumbing modifications at cellar through 004 floor, all as per plans herewith filed. No change in use, egress or occupancy filed und…
M00883172 ↗112 WEST 14 STREET
MANHATTAN
AlterationPermit Issued06/16/202307/02/2024
Owner ALLIAH MANAGEMENT LLC
Contractor CITYWIDE PLBG HTG & SPKLS
Filer A1 EXPEDITING SERVICE CORP.
Interior renovation of Unit 5E (5th Fl) Plumbing work - Removal of existing & installation of. new fixtures & fittings in bathroom & kitchen…
M00875623 ↗112 WEST 14 STREET
MANHATTAN
AlterationPermit Issued06/16/202305/28/2024
Contractor T.PERICIC CONSTRUCTION*
Interior renovation of Unit 5E (5th Fl) - removal & construction of non-load bearing interior partitions, cabinetry, finishes, bathroom fixt…
M01039503 ↗210 EAST 5 STREET
MANHATTAN
AlterationFiled — no permit on record05/07/2024———
B00477922 ↗85 NORTH 6 STREET
BROOKLYN
Alteration COPermit Issued03/31/202103/21/2024
Owner L3 CAPITAL LLC
Contractor CAVAN BUILDERS CORP
Filer CONVERSANO ASSOCIATES, INC.
FILING HEREWITH FOR THE LEGALIZATION OF EXITING PLUMBING FIXTURES OF RESIDENTIAL UNITS IOB SECOND AND THIRD FLOORS.
M00912745 ↗306 WEST 56 STREET
MANHATTAN
AlterationSigned-off08/09/202308/30/2023
Owner DOUGLAS ELLIMAN PROPERTY MANAGEMENT
Contractor JAN ARTISANAL CONCEPT *
Filer CONVERSANO ASSOCIATES, INC.
Apartment 12D create an opening for a new door for convenience access to adjacent unit as per plans herewith filed. No change in use, egress…
M00902007 ↗306 WEST 56 STREET
MANHATTAN
AlterationFiled — no permit on record07/14/2023—
Owner DOUGLAS ELLIMAN PROPERTY MANAGEMENT
Filer CONVERSANO ASSOCIATES, INC.
—
B00893155 ↗330 ELLERY STREET
BROOKLYN
Alteration COFiled — no permit on record07/07/2023—
Owner 330 ELLERY INC.
Filer 4444 PPPP CORP
—
M0082569245 EAST BROADWAY
MANHATTAN
Alteration COFiled — no permit on record05/17/2023—
Owner QUON DUNN CORP.
Filer J. CALLAHAN CONSULTING, INC.
—
M08035136 ↗306 WEST 56 STREET
MANHATTAN
AlterationFiled — no permit on record04/19/2023—
Owner CHARLES H. GREENTHAL
Filer CONVERSANO ASSOCIATES, INC.
—
M00189668 ↗84 WALKER STREET
MANHATTAN
AlterationSigned-off11/19/201912/20/2022
Owner NY CHINESE BAPTIST CHURCH
Contractor ZONE PLUMBING & HEATING C
Filer CONVERSANO ASSOCIATES, INC.
installation of 1 new gas meter in cellar . remove the 3rd floor meter and riser
B00775458 ↗309 SCHOLES STREET
BROOKLYN
Alteration COFiled — no permit on record11/09/2022———
Q00743922 ↗38-01 23 AVENUE
QUEENS
Alteration COFiled — no permit on record11/02/2022———
Q00749902 ↗38-01 23 AVENUE
QUEENS
AlterationFiled — no permit on record11/02/2022—
Owner 23RD AVENUE REALTY
Filer J. CALLAHAN CONSULTING, INC.
—
M00382774 ↗45 EAST BROADWAY
MANHATTAN
AlterationSigned-off09/24/202010/19/2020
Owner QUON DUNN CORP.
Contractor H&M CONTRACTORS INC
Filer J. CALLAHAN CONSULTING, INC.
Filing to include EUP Cards for Roof Top Unit, as per request by FDNY
Scope of Work
HVAC — 3 projects · most recent 08/05/2026
Air Conditioning Systems Ventilation Systems Refrigeration Systems
Sprinkler / Standpipe — 1 project · most recent 08/05/2026
No specific sub-scope on file — project count only.
Plumbing — 5 projects · most recent 01/29/2026
Water/Sanitary Gas
Click a row for this entity's own projects, plans and documents at that building.
BuildingFilingsMost Recent
26 BOND STREET ↗301/22/2026
210 EAST 5 STREET ↗710/06/2025
16-60 STEPHEN STREET ↗107/24/2025
330 ELLERY STREET ↗206/25/2025
85 NORTH 6 STREET ↗506/18/2025
112 WEST 14 STREET ↗304/25/2025
306 WEST 56 STREET ↗703/04/2024
84 WALKER STREET ↗210/26/2023
45 EAST BROADWAY ↗202/08/2023
38-01 23 AVENUE ↗206/02/2022
145 GRAND STREET ↗2—
127 GREEN STREET ↗1—
309 SCHOLES STREET ↗1—
151 SPRING STREET ↗1—
413 WEST BROADWAY ↗1—
▾Documents — 283 on file (BIS + DOB NOW)
▸Plans & Drawings44
▸DOB NOWPlans/Sketch40
08/31/2026M08035136-S1 · 306 WEST 56 STREETRequest digital key ↗
08/29/2026M00912745-P1 · 306 WEST 56 STREETRequest digital key ↗
08/29/2026M00912745-P3 · 306 WEST 56 STREETRequest digital key ↗
Showing 3 of 40 on file for this type
▸DOB NOWPlans/Sketch - Plumbing3
09/05/2026M00189668-I1 · 84 WALKER STREETRequest digital key ↗
09/02/2026B00311720-I1 · 127 GREEN STREETRequest digital key ↗
08/14/2026M00189668-P1 · 84 WALKER STREETRequest digital key ↗
▸DOB NOWPlans/Sketch - Mechanical Systems1
09/04/2026M00382774-I1 · 45 EAST BROADWAYRequest digital key ↗
▸Applications & Permits17
▸DOB NOWLPC Approval/Permit10
08/27/2026M01051260-P1 · 210 EAST 5 STREETOpen ↗
08/27/2026M01051260-I1 · 210 EAST 5 STREETOpen ↗
08/13/2026M00889646-P2 · 26 BOND STREETOpen ↗
Showing 3 of 10 on file for this type
▸DOB NOWHPD Certification Letter or CPC Special Permit5
On file, but not among the 200 most recently loaded documents for this source.
Showing 0 of 5 on file for this type
▸DOB NOWState DEC Permit2
08/13/2026M00189668-P1 · 84 WALKER STREETOpen ↗
08/13/2026M00189668-I1 · 84 WALKER STREETOpen ↗
▸Zoning, Tax Lot & Property Records11
▸DOB NOWRestrictive Declaration/Easement 110
On file, but not among the 200 most recently loaded documents for this source.
Showing 0 of 10 on file for this type
▸DOB NOWHouse Number Verification: TOPO Stamp1
08/13/2026B00893155-I1 · 330 ELLERY STREETOpen ↗
▸Seals & Professional Certifications118
▸DOB NOWProgress Inspector Seal & Signature54
09/02/2026B00477922-S2 · 85 NORTH 6 STREETOpen ↗
09/02/2026B00477922-S2 · 85 NORTH 6 STREETOpen ↗
09/02/2026B00477922-S2 · 85 NORTH 6 STREETOpen ↗
Showing 3 of 54 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature44
09/04/2026M00382774-I1 · 45 EAST BROADWAYOpen ↗
08/28/2026M00889646-I1 · 26 BOND STREETOpen ↗
08/28/2026M00889646-P1 · 26 BOND STREETOpen ↗
Showing 3 of 44 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature20
09/25/2026M00889646-I1 · 26 BOND STREETOpen ↗
09/02/2026B00477922-S2 · 85 NORTH 6 STREETOpen ↗
09/02/2026B00477922-S2 · 85 NORTH 6 STREETOpen ↗
Showing 3 of 20 on file for this type
▸Safety & Tenant Protection33
▸DOB NOWStreet Tree Checklist9
08/25/2026Q00743922-I1 · 38-01 23 AVENUEOpen ↗
08/21/2026M01053906-I1 · 145 GRAND STREETOpen ↗
08/16/2026Q01261024-I1 · 16-60 STEPHEN STREETOpen ↗
Showing 3 of 9 on file for this type
▸DOB NOWHPD-1: Anti-Harassment Area Checklist8
08/13/2026B00311720-I1 · 127 GREEN STREETOpen ↗
Showing 1 of 8 on file for this type
▸DOB NOWHPD-2: Clinton Special District Anti-Harassment Checklist7
08/13/2026M00902007-I1 · 306 WEST 56 STREETOpen ↗
08/13/2026M00912745-P2 · 306 WEST 56 STREETOpen ↗
08/13/2026M00912745-I1 · 306 WEST 56 STREETOpen ↗
Showing 3 of 7 on file for this type
▸DOB NOWCertificate of No Harassment5
On file, but not among the 200 most recently loaded documents for this source.
Showing 0 of 5 on file for this type
▸DOB NOWTenant Protection Plan3
08/13/2026M00189668-P1 · 84 WALKER STREETOpen ↗
08/13/2026B00311720-I1 · 127 GREEN STREETOpen ↗
08/13/2026M00189668-I1 · 84 WALKER STREETOpen ↗
▸DOB NOWParks Department Acknowledgment Letter for Street Trees Plan1
On file, but not among the 200 most recently loaded documents for this source.
Showing 0 of 1 on file for this type
▸Environmental & Asbestos29
▸DOB NOWDEP ACP-5: Asbestos Assessment Report20
08/28/2026M00889646-P1 · 26 BOND STREETOpen ↗
08/28/2026M00889646-I1 · 26 BOND STREETOpen ↗
08/28/2026M00889646-P2 · 26 BOND STREETOpen ↗
Showing 3 of 20 on file for this type
▸DOB NOWDEP ACP-20/ACP-21: Asbestos Project Conditional Completion Form/Asbestos Project Completion Form8
08/13/2026M00902007-I1 · 306 WEST 56 STREETOpen ↗
08/13/2026M00912745-I1 · 306 WEST 56 STREETOpen ↗
08/13/2026M08035136-I1 · 306 WEST 56 STREETOpen ↗
Showing 3 of 8 on file for this type
▸DOB NOWOER: Notice to Proceed1
08/13/2026B00311720-I1 · 127 GREEN STREETOpen ↗
▸Energy Compliance1
▸DOB NOWEN2: As Built Energy Analysis.1
On file, but not among the 200 most recently loaded documents for this source.
Showing 0 of 1 on file for this type
▸Approvals, Objections & Sign-offs2
▸DOB NOWFee Exempt Supporting Document - DOF ACRIS report or BIB letter2
08/13/2026M00189668-P1 · 84 WALKER STREETOpen ↗
Showing 1 of 2 on file for this type
▸Other Documents28
▸DOB NOWLoft Board Certificate21
09/04/2026M00382774-I1 · 45 EAST BROADWAYOpen ↗
09/01/2026M00189668-I1 · 84 WALKER STREETOpen ↗
09/01/2026B00477922-I1 · 85 NORTH 6 STREETOpen ↗
Showing 3 of 21 on file for this type
▸DOB NOWProperty Ownership Certification6
08/25/2026Q00743922-I1 · 38-01 23 AVENUEOpen ↗
08/21/2026M01106865-I1 · 151 SPRING STREETOpen ↗
08/21/2026M01053906-I1 · 145 GRAND STREETOpen ↗
Showing 3 of 6 on file for this type
▸DOB NOWFinal Survey1
On file, but not among the 200 most recently loaded documents for this source.
Showing 0 of 1 on file for this type