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Design Firm
BELSEY & MAHLA ARCHITECTS
Design
3 projects with open permitsMANHATTAN · 10BROOKLYN · 1
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8 buildings
25
Total Filings
11
Projects on File
8
Buildings Worked
3
Projects w/ Open Permits
Design
Role
Activity
Projects by first filing month11 projects all-time
0123Feb '20 · 2Oct '21 · 2Dec '23 · 1Mar '24 · 2Apr '25 · 1Jan '26 · 1May '26 · 1Jun '26 · 1202120222023202420252026
bars = month · line = 3-mo average
Portfolio status
Browse projects →
Open permit327%
Signed off764%
Filed only19%
By project type
Alteration11
Most active buildings
All buildings →
521 WEST 23 STREETMANHATTAN · latest 07/13/2021
2 projects
336 WEST END AVENUEMANHATTAN · latest 04/18/2024
2 projects
137 RIVERSIDE DRIVEMANHATTAN · latest 03/31/2023
2 projects
320 CENTRAL PARK WESTMANHATTAN · latest 05/20/2026
1 projects
1180 2 AVENUEMANHATTAN · 1 open · latest 04/28/2026
1 projects
1325 1 AVENUEMANHATTAN · latest 01/16/2024
1 projects
Key relationships
Everyone →
Filing representatives
8 projects
People
All people →
ERIKA BELSEYlatest 06/11/2026
16 filings
PHILIP MAHLAlatest 07/30/2021
4 filings
Filed under
BELSEY & MAHLA ARCHITECTS25
Identified by the contact ids of the people who file for the firm and by its email domain (belseyandmahla.com), not by matching names.
Most recent projects
All projects →
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M01415542 ↗25 CENTRAL PARK WEST
MANHATTAN
AlterationPermit Issued06/25/202608/04/2026
Contractor PROSTAR PLUMBING AND HEAT
Filer J. CALLAHAN CONSULTING, INC.
Removal of plumbing fixtures for later installation
M01364806 ↗320 CENTRAL PARK WEST
MANHATTAN
AlterationFiled — no permit on record05/20/2026—
Filer J. CALLAHAN CONSULTING, INC.
—
M01307773 ↗1180 2 AVENUE
MANHATTAN
AlterationPermit Issued01/15/202604/28/2026
Owner Halstead Management
Contractor A.L.L. CONSTRUCTION AND D
Filer J. CALLAHAN CONSULTING, INC.
RENOVATION OF APARTMENT #15FG, 301 EAST 62ND STREET, NEW YORK, NY 10065, WITHKITCHEN AND BATHROOM RENOVATIONS.
B01157173 ↗1 PIERREPONT STREET
BROOKLYN
AlterationPermit Issued04/27/202511/18/2025
Owner ONE PIERREPONT STREET CORP.
Contractor TAFFERA FINE BUILDING AND
Filer J. CALLAHAN CONSULTING, INC.
Renovation of existing apartment 3A. No change in use, egress or Occupancy.
M01008740 ↗336 WEST END AVENUE
MANHATTAN
AlterationSigned-off03/04/202404/18/2024
Contractor DONATO PLUMBING, INC
Filer J. CALLAHAN CONSULTING, INC.
Replace fixtures in existing apartment 14 C in conjunction with alteration.
M01008608 ↗336 WEST END AVENUE
MANHATTAN
AlterationSigned-off03/04/202404/16/2024
Contractor A.L.L. CONSTRUCTION AND D
Renovation of apartment # 14C, with Kitchen and bathroom renovations.
Counts cover all 11 projects (11 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
ERIKA BELSEY1606/11/2026
PHILIP MAHLA407/30/2021
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
DONATO PLUMBING, INC301/15/2026
A.L.L. CONSTRUCTION AND D201/15/2026
APOLLO PLBG & HTG INC106/02/2023
CELTIC CRAFTS CONSTRUCTIO106/25/2026
CHATZI CONSTRUCTION INC104/27/2023
EDUARD POPESCU112/05/2023
PMC CONSTRUCTION AND HOME105/21/2021
PROSTAR PLUMBING AND HEAT106/25/2026
SUPERIOR PLUMBING,HEATING108/05/2021
TAFFERA FINE BUILDING AND104/27/2025
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
ABC REALTY208/05/2021
360 EAST 72ND STREET MANAGEMENT COR112/05/2023
HALSTEAD MANAGEMENT101/15/2026
ONE PIERREPONT STREET CORP.104/27/2025
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
J. CALLAHAN CONSULTING, INC.806/25/2026
11 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 11Open permit 3Signed off 7Filed only 1
11 projects
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M01415542 ↗25 CENTRAL PARK WEST
MANHATTAN
AlterationPermit Issued06/25/202608/04/2026
Contractor PROSTAR PLUMBING AND HEAT
Filer J. CALLAHAN CONSULTING, INC.
Removal of plumbing fixtures for later installation
M01364806 ↗320 CENTRAL PARK WEST
MANHATTAN
AlterationFiled — no permit on record05/20/2026—
Filer J. CALLAHAN CONSULTING, INC.
—
M01307773 ↗1180 2 AVENUE
MANHATTAN
AlterationPermit Issued01/15/202604/28/2026
Owner Halstead Management
Contractor A.L.L. CONSTRUCTION AND D
Filer J. CALLAHAN CONSULTING, INC.
RENOVATION OF APARTMENT #15FG, 301 EAST 62ND STREET, NEW YORK, NY 10065, WITHKITCHEN AND BATHROOM RENOVATIONS.
B01157173 ↗1 PIERREPONT STREET
BROOKLYN
AlterationPermit Issued04/27/202511/18/2025
Owner ONE PIERREPONT STREET CORP.
Contractor TAFFERA FINE BUILDING AND
Filer J. CALLAHAN CONSULTING, INC.
Renovation of existing apartment 3A. No change in use, egress or Occupancy.
M01008740 ↗336 WEST END AVENUE
MANHATTAN
AlterationSigned-off03/04/202404/18/2024
Contractor DONATO PLUMBING, INC
Filer J. CALLAHAN CONSULTING, INC.
Replace fixtures in existing apartment 14 C in conjunction with alteration.
M01008608 ↗336 WEST END AVENUE
MANHATTAN
AlterationSigned-off03/04/202404/16/2024
Contractor A.L.L. CONSTRUCTION AND D
Renovation of apartment # 14C, with Kitchen and bathroom renovations.
M00939091 ↗1325 1 AVENUE
MANHATTAN
AlterationSigned-off12/05/202301/16/2024
Owner 360 EAST 72ND STREET MANAGEMENT COR
Contractor EDUARD POPESCU
Filer J. CALLAHAN CONSULTING, INC.
minor Interior renovation of unit C2303
M00590776 ↗137 RIVERSIDE DRIVE
MANHATTAN
AlterationSigned-off10/05/202103/31/2023
Contractor APOLLO PLBG & HTG INC
Filer J. CALLAHAN CONSULTING, INC.
Plumbing work in conjunction with alt
M00499766 ↗137 RIVERSIDE DRIVE
MANHATTAN
AlterationSigned-off10/05/202107/15/2022
Contractor CHATZI CONSTRUCTION INC
Filer J. CALLAHAN CONSULTING, INC.
Renovation of apartment 4a and installation of 2 Ptac units
M00317246 ↗521 WEST 23 STREET
MANHATTAN
AlterationSigned-off02/27/202007/13/2021
Owner ABC REALTY
Contractor SUPERIOR PLUMBING,HEATING
Installation and modification of plumbing fixtures of existing apartment on floor 008. Plumbing work. There is to be no change of use, occup…
M00317247 ↗521 WEST 23 STREET
MANHATTAN
AlterationSigned-off02/27/202002/01/2021
Owner ABC REALTY
Contractor PMC CONSTRUCTION AND HOME
Fresh air duct-work for ventilation at bathrooms and kitchen at existing apartment on floor 008. Mechanical work. There is to be no change o…
Scope of Work
Plumbing — 4 projects · most recent 06/25/2026
Gas Water/Sanitary
Click a row for this entity's own projects, plans and documents at that building.
BuildingFilingsMost Recent
25 CENTRAL PARK WEST ↗206/11/2026
320 CENTRAL PARK WEST ↗203/18/2026
1180 2 AVENUE ↗210/23/2025
1 PIERREPONT STREET ↗212/17/2024
336 WEST END AVENUE ↗508/21/2024
1325 1 AVENUE ↗109/25/2023
137 RIVERSIDE DRIVE ↗605/31/2023
521 WEST 23 STREET ↗507/30/2021
▾Documents — 109 on file (BIS + DOB NOW)
▸Plans & Drawings22
▸DOB NOWPlans/Sketch18
09/03/2026M00590776-P2 · 137 RIVERSIDE DRIVERequest digital key ↗
09/03/2026M00590776-I1 · 137 RIVERSIDE DRIVERequest digital key ↗
08/31/2026M00499766-P1 · 137 RIVERSIDE DRIVERequest digital key ↗
Showing 3 of 18 on file for this type
▸DOB NOWPlans/Sketch - Mechanical Systems2
09/05/2026M00317247-I1 · 521 WEST 23 STREETRequest digital key ↗
08/15/2026M00317247-P1 · 521 WEST 23 STREETRequest digital key ↗
▸DOB NOWPlans/Sketch - Plumbing2
09/05/2026M00317246-P1 · 521 WEST 23 STREETRequest digital key ↗
08/14/2026M00317246-I1 · 521 WEST 23 STREETRequest digital key ↗
▸Applications & Permits15
▸DOB NOWLPC Approval/Permit15
08/15/2026M01415542-I1 · 25 CENTRAL PARK WESTOpen ↗
08/15/2026M01415542-S1 · 25 CENTRAL PARK WESTOpen ↗
08/14/2026M01364806-S1 · 320 CENTRAL PARK WESTOpen ↗
Showing 3 of 15 on file for this type
▸Seals & Professional Certifications37
▸DOB NOWDPL-1: Design Professional Seal & Signature22
09/05/2026M00317247-I1 · 521 WEST 23 STREETOpen ↗
09/05/2026M00317247-P1 · 521 WEST 23 STREETOpen ↗
09/05/2026M00317246-I1 · 521 WEST 23 STREETOpen ↗
Showing 3 of 22 on file for this type
▸DOB NOWProgress Inspector Seal & Signature8
09/18/2026M01008608-I1 · 336 WEST END AVENUEOpen ↗
09/05/2026M00317247-P1 · 521 WEST 23 STREETOpen ↗
08/28/2026M01415542-I1 · 25 CENTRAL PARK WESTOpen ↗
Showing 3 of 8 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature7
09/05/2026M00317247-P1 · 521 WEST 23 STREETOpen ↗
09/05/2026M00317247-P1 · 521 WEST 23 STREETOpen ↗
08/27/2026M00499766-I1 · 137 RIVERSIDE DRIVEOpen ↗
Showing 3 of 7 on file for this type
▸Safety & Tenant Protection9
▸DOB NOWHPD-1: Anti-Harassment Area Checklist4
08/14/2026M00317246-I1 · 521 WEST 23 STREETOpen ↗
08/13/2026M00317247-I1 · 521 WEST 23 STREETOpen ↗
08/13/2026M00317247-P1 · 521 WEST 23 STREETOpen ↗
Showing 3 of 4 on file for this type
▸DOB NOWTenant Protection Plan4
08/14/2026M00317246-I1 · 521 WEST 23 STREETOpen ↗
08/13/2026M00317246-P1 · 521 WEST 23 STREETOpen ↗
Showing 2 of 4 on file for this type
▸DOB NOWHPD-1 Anti-Harassment Area Checklist1
09/01/2026M00317247-I1 · 521 WEST 23 STREETOpen ↗
▸Environmental & Asbestos22
▸DOB NOWDEP ACP-5: Asbestos Assessment Report22
09/05/2026M00317247-I1 · 521 WEST 23 STREETOpen ↗
09/03/2026M00590776-I1 · 137 RIVERSIDE DRIVEOpen ↗
09/03/2026M00590776-P2 · 137 RIVERSIDE DRIVEOpen ↗
Showing 3 of 22 on file for this type
▸Approvals, Objections & Sign-offs1
▸DOB NOWLandmark Approval1
09/01/2026M01008608-I1 · 336 WEST END AVENUEOpen ↗
▸Other Documents3
▸DOB NOWDHCR Document2
08/13/2026M00939091-I1 · 1325 1 AVENUEOpen ↗
08/13/2026M01307773-I1 · 1180 2 AVENUEOpen ↗
▸DOB NOWProof of Historic Building1
08/13/2026B01157173-I1 · 1 PIERREPONT STREETOpen ↗