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Design Firm
WALTER CHATHAM ARCHITECT
Design
3 projects with open permitsMANHATTAN · 7
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5 buildings
18
Total Filings
7
Projects on File
5
Buildings Worked
3
Projects w/ Open Permits
Design
Role
Activity
Projects by first filing month7 projects all-time
0123Dec '20 · 1Nov '21 · 1Jan '22 · 1Aug '22 · 2Jul '24 · 1May '26 · 1202120222023202420252026
bars = month · line = 3-mo average
Portfolio status
Browse projects →
Open permit343%
Signed off229%
Filed only229%
By project type
Alteration5
No Work1
Alteration CO1
Most active buildings
All buildings →
1010 5 AVENUEMANHATTAN · latest 10/13/2023
2 projects
11 MADISON AVENUEMANHATTAN · 1 open · latest 01/03/2022
2 projects
542 BROADWAYMANHATTAN · 1 open · latest 02/05/2026
1 projects
200 CENTRAL PARK SOUTHMANHATTAN · 1 open · latest 07/30/2026
1 projects
415 EAST 54 STREETMANHATTAN · latest 12/01/2020
1 projects
Key relationships
Everyone →
Filing representatives
2 projects
1 projects
1 projects
1 projects
Owners
1 projects
People
All people →
WALTER CHATHAMlatest 05/06/2026
11 filings
Filed under
WALTER CHATHAM ARCHITECT18
Identified by the contact ids of the people who file for the firm and by its email domain (wfchatham.com), not by matching names.
Most recent projects
All projects →
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M01397460 ↗200 CENTRAL PARK SOUTH
MANHATTAN
AlterationPermit Issued05/28/202607/30/2026
Contractor DONATO PLUMBING, INC
Filer WILLIAM VITACCO ASSOCIATES
Modifications to the existing plumbing system for Interior renovations to apartment 24A. No change in use, egress or occupancy
M01069481 ↗542 BROADWAY
MANHATTAN
AlterationPermit Issued07/30/202402/05/2026
Contractor DLG INTERIORS RENOVATIONS
Filer JM ZONING, LLC.
GC application filed to separate apartments 4F & 5F that were previously combined per TPPN 3/97. Convenience stair to be removed. No change …
M00775249 ↗1010 5 AVENUE
MANHATTAN
AlterationSigned-off08/05/202210/13/2023
Contractor BHD GROUP LLC
Filer GREEN LIGHT EXPEDITING LLC
FILING FOR INTERIOR RENOVATION OF APT 13CDE AS PER PLANS SUBMITTED HEREWITH.
M00775273 ↗1010 5 AVENUE
MANHATTAN
AlterationSigned-off08/02/202211/09/2022
Contractor SMART PLBG & HTG CORP
Filer GREEN LIGHT EXPEDITING LLC
FILING FOR PLUMBING WORK ASSOCIATED WITH INTERIOR RENOVATION OF APT 13CDE AS PER PLANS SUBMITTED HEREWITH. NO CHANGE IN USE, EGRESS, OCCUPAN…
M00641167 ↗11 MADISON AVENUE
MANHATTAN
No WorkFiled — no permit on record01/03/2022———
M00622377 ↗11 MADISON AVENUE
MANHATTAN
Alteration COPermit Issued11/12/202112/02/2021
Owner SL GREEN REALTY CORP.
Contractor JRM CONSTRUCTION MGMT LLC
Filer RIZZO GROUP
General Construction taking place on the 12th Floor as per plans filed herewith.
Counts cover all 7 projects (7 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
WALTER CHATHAM1105/06/2026
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
BHD GROUP LLC101/29/2023
DLG INTERIORS RENOVATIONS107/30/2024
DONATO PLUMBING, INC105/28/2026
GENESIS PLBG AND HTG CORP107/30/2024
JRM CONSTRUCTION MGMT LLC101/17/2023
ORION CONSTRUCTION & PAIN105/28/2026
SMART PLBG & HTG CORP102/01/2024
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
SL GREEN REALTY CORP101/17/2023
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
GREEN LIGHT EXPEDITING LLC202/01/2024
JM ZONING, LLC.107/30/2024
RIZZO GROUP101/17/2023
WILLIAM VITACCO ASSOCIATES105/28/2026
7 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 7Open permit 3Signed off 2Filed only 2
Any typeAlteration 5No Work 1Alteration CO 1
7 projects
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M01397460 ↗200 CENTRAL PARK SOUTH
MANHATTAN
AlterationPermit Issued05/28/202607/30/2026
Contractor DONATO PLUMBING, INC
Filer WILLIAM VITACCO ASSOCIATES
Modifications to the existing plumbing system for Interior renovations to apartment 24A. No change in use, egress or occupancy
M01069481 ↗542 BROADWAY
MANHATTAN
AlterationPermit Issued07/30/202402/05/2026
Contractor DLG INTERIORS RENOVATIONS
Filer JM ZONING, LLC.
GC application filed to separate apartments 4F & 5F that were previously combined per TPPN 3/97. Convenience stair to be removed. No change …
M00775249 ↗1010 5 AVENUE
MANHATTAN
AlterationSigned-off08/05/202210/13/2023
Contractor BHD GROUP LLC
Filer GREEN LIGHT EXPEDITING LLC
FILING FOR INTERIOR RENOVATION OF APT 13CDE AS PER PLANS SUBMITTED HEREWITH.
M00775273 ↗1010 5 AVENUE
MANHATTAN
AlterationSigned-off08/02/202211/09/2022
Contractor SMART PLBG & HTG CORP
Filer GREEN LIGHT EXPEDITING LLC
FILING FOR PLUMBING WORK ASSOCIATED WITH INTERIOR RENOVATION OF APT 13CDE AS PER PLANS SUBMITTED HEREWITH. NO CHANGE IN USE, EGRESS, OCCUPAN…
M00641167 ↗11 MADISON AVENUE
MANHATTAN
No WorkFiled — no permit on record01/03/2022———
M00622377 ↗11 MADISON AVENUE
MANHATTAN
Alteration COPermit Issued11/12/202112/02/2021
Owner SL GREEN REALTY CORP.
Contractor JRM CONSTRUCTION MGMT LLC
Filer RIZZO GROUP
General Construction taking place on the 12th Floor as per plans filed herewith.
M00427374 ↗415 EAST 54 STREET
MANHATTAN
AlterationFiled — no permit on record12/01/2020———
Scope of Work
Plumbing — 2 projects · most recent 05/28/2026
Water/Sanitary
Click a row for this entity's own projects, plans and documents at that building.
BuildingFilingsMost Recent
200 CENTRAL PARK SOUTH ↗205/06/2026
542 BROADWAY ↗206/20/2024
1010 5 AVENUE ↗401/23/2024
11 MADISON AVENUE ↗901/10/2023
415 EAST 54 STREET ↗1—
▾Documents — 92 on file (BIS + DOB NOW)
▸Plans & Drawings17
▸DOB NOWPlans/Sketch12
09/02/2026M00622377-P2 · 11 MADISON AVENUERequest digital key ↗
09/02/2026M00622377-P3 · 11 MADISON AVENUERequest digital key ↗
09/02/2026M00622377-I1 · 11 MADISON AVENUERequest digital key ↗
Showing 3 of 12 on file for this type
▸DOB NOWPlans/Sketch - Place of Assembly4
09/01/2026M00641167-I1 · 11 MADISON AVENUERequest digital key ↗
09/01/2026M00641167-P1 · 11 MADISON AVENUERequest digital key ↗
Showing 2 of 4 on file for this type
▸DOB NOWPlans/Sketch - Plumbing1
09/04/2026M00427374-I1 · 415 EAST 54 STREETRequest digital key ↗
▸Applications & Permits6
▸DOB NOWLPC Approval/Permit6
08/13/2026M00775249-I1 · 1010 5 AVENUEOpen ↗
08/13/2026M00775249-P1 · 1010 5 AVENUEOpen ↗
08/13/2026M00775273-I1 · 1010 5 AVENUEOpen ↗
Showing 3 of 6 on file for this type
▸Seals & Professional Certifications29
▸DOB NOWDPL-1: Design Professional Seal & Signature17
09/04/2026M00427374-I1 · 415 EAST 54 STREETOpen ↗
09/01/2026M00641167-I1 · 11 MADISON AVENUEOpen ↗
09/01/2026M00641167-P1 · 11 MADISON AVENUEOpen ↗
Showing 3 of 17 on file for this type
▸DOB NOWProgress Inspector Seal & Signature11
09/27/2026M01397460-I1 · 200 CENTRAL PARK SOUTHOpen ↗
09/01/2026M00775249-P1 · 1010 5 AVENUEOpen ↗
09/01/2026M00641167-I1 · 11 MADISON AVENUEOpen ↗
Showing 3 of 11 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature1
08/26/2026M00775249-I1 · 1010 5 AVENUEOpen ↗
▸Safety & Tenant Protection6
▸DOB NOWStreet Tree Checklist4
08/13/2026M00622377-P1 · 11 MADISON AVENUEOpen ↗
08/13/2026M00622377-I1 · 11 MADISON AVENUEOpen ↗
08/13/2026M00622377-P2 · 11 MADISON AVENUEOpen ↗
Showing 3 of 4 on file for this type
▸DOB NOWTenant Protection Plan1
08/13/2026M00427374-I1 · 415 EAST 54 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 & Asbestos13
▸DOB NOWDEP ACP-5: Asbestos Assessment Report13
09/04/2026M00427374-I1 · 415 EAST 54 STREETOpen ↗
08/28/2026M00775273-P1 · 1010 5 AVENUEOpen ↗
08/17/2026M01397460-S1 · 200 CENTRAL PARK SOUTHOpen ↗
Showing 3 of 13 on file for this type
▸Other Documents21
▸DOB NOWProof of Historic Building5
08/13/2026M00775273-I1 · 1010 5 AVENUEOpen ↗
08/13/2026M00775249-I1 · 1010 5 AVENUEOpen ↗
08/13/2026M00775249-P1 · 1010 5 AVENUEOpen ↗
Showing 3 of 5 on file for this type
▸DOB NOWAlternate Plan 24
09/01/2026M00641167-I1 · 11 MADISON AVENUEOpen ↗
09/01/2026M00641167-P4 · 11 MADISON AVENUEOpen ↗
09/01/2026M00641167-P1 · 11 MADISON AVENUEOpen ↗
Showing 3 of 4 on file for this type
▸DOB NOWProperty Ownership Certification4
On file, but not among the 200 most recently loaded documents for this source.
Showing 0 of 4 on file for this type
▸DOB NOWAlternate Plan 14
09/01/2026M00641167-P4 · 11 MADISON AVENUEOpen ↗
09/01/2026M00641167-P1 · 11 MADISON AVENUEOpen ↗
09/01/2026M00641167-I1 · 11 MADISON AVENUEOpen ↗
Showing 3 of 4 on file for this type
▸DOB NOWAlternate Plan 34
09/01/2026M00641167-P2 · 11 MADISON AVENUEOpen ↗
09/01/2026M00641167-I1 · 11 MADISON AVENUEOpen ↗
09/01/2026M00641167-P4 · 11 MADISON AVENUEOpen ↗
Showing 3 of 4 on file for this type