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Design Firm
MITCHELL STUDIO
Design
4 projects with open permitsMANHATTAN · 8
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5 buildings
12
Total Filings
8
Projects on File
5
Buildings Worked
4
Projects w/ Open Permits
Design
Role
Activity
Projects by first filing month8 projects all-time
0123Feb '22 · 1Jan '25 · 1Feb '25 · 1Apr '25 · 1Sep '25 · 2Mar '26 · 1Aug '26 · 12023202420252026
bars = month · line = 3-mo average
Portfolio status
Browse projects →
Open permit450%
Signed off338%
Filed only112%
By project type
Alteration8
Most active buildings
All buildings →
150 CENTRAL PARK SOUTHMANHATTAN · latest 08/04/2026
2 projects
1115 5 AVENUEMANHATTAN · 2 open · latest 07/10/2026
2 projects
6 EAST 68 STREETMANHATTAN · 2 open · latest 01/26/2026
2 projects
960 PARK AVENUEMANHATTAN · latest 03/21/2025
1 projects
240 CENTRE STREETMANHATTAN · latest 08/04/2023
1 projects
Key relationships
Everyone →
Design firms
1 projects
Filing representatives
2 projects
1 projects
1 projects
People
All people →
STEPHEN MITCHELLlatest 07/27/2026
6 filings
Filed under
MITCHELL STUDIO12
Identified by the contact ids of the people who file for the firm and by its email domain (mitchellstudio.net), not by matching names.
Most recent projects
All projects →
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M01436820 ↗150 CENTRAL PARK SOUTH
MANHATTAN
AlterationFiled — no permit on record08/04/2026—
Filer J. CALLAHAN CONSULTING, INC.
—
M01169253 ↗1115 5 AVENUE
MANHATTAN
AlterationPermit Issued02/25/202507/10/2026
Owner EMPIRE
Contractor JOHN HUMMEL CUSTOM BLD IN
Filer I & L CONSULTING, INC.
Limited to interior demolition to existing apt # 5B ON THE 5TH FL. Remove non-bearing partitions & interior finishes, removal of all window…
M01208388 ↗1115 5 AVENUE
MANHATTAN
AlterationPermit Issued04/29/202507/10/2026
Contractor JOHN HUMMEL CUSTOM BLD IN
Interior renovation to existing apt # 5B ON THE 5TH FL. Construct new partitions and finishes. windows to be replace by bothers . No change…
M01350105 ↗150 CENTRAL PARK SOUTH
MANHATTAN
AlterationSigned-off03/06/202603/24/2026
Contractor CLARK CONSTRUCTION CORP
Interior demolition of non-load bearing partitions, doors, interior finishes, appliances, lighting and plumbing fixtures. No change to use, …
M01281056 ↗6 EAST 68 STREET
MANHATTAN
AlterationPermit Issued09/09/202501/26/2026
Contractor DONATO PLUMBING, INC
Filer J. CALLAHAN CONSULTING, INC.
Plumbing work proposed for an existing apartment. No change of use, occupancy or egress.
M01281005 ↗6 EAST 68 STREET
MANHATTAN
AlterationPermit Issued09/09/202501/21/2026
Contractor NORDIC CUSTOM BUILDERS IN
Renovation of an existing apartment. No change of use, occupancy or egress.
Counts cover all 8 projects (8 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
STEPHEN MITCHELL607/27/2026
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
CES ENGINEERING LLC108/04/2026
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
JOHN HUMMEL CUSTOM BLD IN304/29/2025
CLARK CONSTRUCTION CORP103/06/2026
DONATO PLUMBING, INC109/09/2025
NORDIC CUSTOM BUILDERS IN109/09/2025
RG DECORATING & PAINTING101/17/2025
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
DOUGLAS ELLIMAN PROPERTY MANAGEMENT106/29/2023
EMPIRE102/25/2025
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
J. CALLAHAN CONSULTING, INC.208/04/2026
I & L CONSULTING, INC.102/25/2025
JONATHAN B. HELD A.I.A.106/29/2023
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 4Signed off 3Filed only 1
8 projects
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M01436820 ↗150 CENTRAL PARK SOUTH
MANHATTAN
AlterationFiled — no permit on record08/04/2026—
Filer J. CALLAHAN CONSULTING, INC.
—
M01169253 ↗1115 5 AVENUE
MANHATTAN
AlterationPermit Issued02/25/202507/10/2026
Owner EMPIRE
Contractor JOHN HUMMEL CUSTOM BLD IN
Filer I & L CONSULTING, INC.
Limited to interior demolition to existing apt # 5B ON THE 5TH FL. Remove non-bearing partitions & interior finishes, removal of all window…
M01208388 ↗1115 5 AVENUE
MANHATTAN
AlterationPermit Issued04/29/202507/10/2026
Contractor JOHN HUMMEL CUSTOM BLD IN
Interior renovation to existing apt # 5B ON THE 5TH FL. Construct new partitions and finishes. windows to be replace by bothers . No change…
M01350105 ↗150 CENTRAL PARK SOUTH
MANHATTAN
AlterationSigned-off03/06/202603/24/2026
Contractor CLARK CONSTRUCTION CORP
Interior demolition of non-load bearing partitions, doors, interior finishes, appliances, lighting and plumbing fixtures. No change to use, …
M01281056 ↗6 EAST 68 STREET
MANHATTAN
AlterationPermit Issued09/09/202501/26/2026
Contractor DONATO PLUMBING, INC
Filer J. CALLAHAN CONSULTING, INC.
Plumbing work proposed for an existing apartment. No change of use, occupancy or egress.
M01281005 ↗6 EAST 68 STREET
MANHATTAN
AlterationPermit Issued09/09/202501/21/2026
Contractor NORDIC CUSTOM BUILDERS IN
Renovation of an existing apartment. No change of use, occupancy or egress.
M01160541 ↗960 PARK AVENUE
MANHATTAN
AlterationSigned-off01/17/202503/21/2025
Contractor RG DECORATING & PAINTING
Interior Renovation to existing Class A Apt. 1B on the 1st fl. remove and construct new partition, new opening at exterior wall for new thru…
M00646131 ↗240 CENTRE STREET
MANHATTAN
AlterationSigned-off02/05/202208/04/2023
Owner Douglas Elliman Property Management
Contractor JOHN HUMMEL CUSTOM BLD IN
Filer JONATHAN B. HELD A.I.A.
Repairs to structural slab and reinforcement.
Scope of Work
HVAC — 1 project · most recent 08/04/2026
Heating and Air Conditioning Systems
Plumbing — 2 projects · most recent 08/04/2026
Water/Sanitary Gas
Electrical — 1 project · most recent 04/10/2025
No specific sub-scope on file — project count only.
Click a row for this entity's own projects, plans and documents at that building.
BuildingFilingsMost Recent
150 CENTRAL PARK SOUTH ↗207/27/2026
6 EAST 68 STREET ↗209/03/2025
1115 5 AVENUE ↗201/20/2025
240 CENTRE STREET ↗506/27/2023
960 PARK AVENUE ↗1—
▾Documents — 72 on file (BIS + DOB NOW)
▸Plans & Drawings13
▸DOB NOWPlans/Sketch13
09/02/2026M00646131-S1 · 240 CENTRE STREETRequest digital key ↗
09/02/2026M00646131-P1 · 240 CENTRE STREETRequest digital key ↗
09/02/2026M00646131-P2 · 240 CENTRE STREETRequest digital key ↗
Showing 3 of 13 on file for this type
▸Applications & Permits8
▸DOB NOWLPC Approval/Permit8
08/13/2026M01281056-I1 · 6 EAST 68 STREETOpen ↗
08/13/2026M01208388-I1 · 1115 5 AVENUEOpen ↗
08/13/2026M01281005-I1 · 6 EAST 68 STREETOpen ↗
Showing 3 of 8 on file for this type
▸Seals & Professional Certifications32
▸DOB NOWDPL-1: Design Professional Seal & Signature13
09/02/2026M00646131-P1 · 240 CENTRE STREETOpen ↗
09/02/2026M00646131-I1 · 240 CENTRE STREETOpen ↗
09/02/2026M00646131-P2 · 240 CENTRE STREETOpen ↗
Showing 3 of 13 on file for this type
▸DOB NOWProgress Inspector Seal & Signature11
09/01/2026M00646131-S1 · 240 CENTRE STREETOpen ↗
08/26/2026M01436820-S2 · 150 CENTRAL PARK SOUTHOpen ↗
08/26/2026M01436820-S2 · 150 CENTRAL PARK SOUTHOpen ↗
Showing 3 of 11 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature8
09/01/2026M00646131-S1 · 240 CENTRE STREETOpen ↗
09/01/2026M00646131-S1 · 240 CENTRE STREETOpen ↗
09/01/2026M00646131-S1 · 240 CENTRE STREETOpen ↗
Showing 3 of 8 on file for this type
▸Environmental & Asbestos13
▸DOB NOWDEP ACP-5: Asbestos Assessment Report11
09/02/2026M00646131-P1 · 240 CENTRE STREETOpen ↗
09/02/2026M00646131-P2 · 240 CENTRE STREETOpen ↗
09/02/2026M00646131-S1 · 240 CENTRE STREETOpen ↗
Showing 3 of 11 on file for this type
▸DOB NOWDEP ACP-20/ACP-21: Asbestos Project Conditional Completion Form/Asbestos Project Completion Form2
08/24/2026M01169253-I1 · 1115 5 AVENUEOpen ↗
08/24/2026M01208388-I1 · 1115 5 AVENUEOpen ↗
▸Energy Compliance1
▸DOB NOWEN2: As Built Energy Analysis1
On file, but not among the 200 most recently loaded documents for this source.
Showing 0 of 1 on file for this type
▸Other Documents5
▸DOB NOWProof of Historic Building5
08/13/2026M01169253-I1 · 1115 5 AVENUEOpen ↗
08/13/2026M01281005-I1 · 6 EAST 68 STREETOpen ↗
08/13/2026M01281056-I1 · 6 EAST 68 STREETOpen ↗
Showing 3 of 5 on file for this type