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Design Firm
H.OH ARCHITECTURE P.C.
Design
MANHATTAN · 2
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2 buildings
2
Total Filings
2
Projects on File
2
Buildings Worked
0
Projects w/ Open Permits
Design
Role
Activity
Projects by first filing month2 projects all-time
0112Sep '25 · 1Dec '25 · 1Sep '25Oct '25Nov '25Dec '25
Portfolio status
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Signed off150%
Filed only150%
By project type
Alteration2
Most active buildings
All buildings →
15 WEST 51 STREETMANHATTAN · latest 10/03/2025
1 projects
335 EAST 45 STREETMANHATTAN · latest 12/11/2025
1 projects
Key relationships
Everyone →
Filing representatives
1 projects
Contractors
1 projects
Owners
1 projects
People
All people →
HYEJIN OHlatest 11/19/2025
1 filings
Filed under
H.OH ARCHITECTURE P.C.2
Identified by the contact ids of the people who file for the firm and by its email domain (h-oh-architecture.com), not by matching names.
Most recent projects
All projects →
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M01321557 ↗335 EAST 45 STREET
MANHATTAN
AlterationFiled — no permit on record12/11/2025—
Owner Korean Mission to the UN
Filer RIZZO GROUP
—
M01280582 ↗15 WEST 51 STREET
MANHATTAN
AlterationSigned-off09/12/202510/03/2025
Contractor DKT CONTRACTORS LLC
General construction on 24th Fl as per plans filed herewith. No changes in use, egress or occupancy.
Counts cover all 2 projects (2 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
HYEJIN OH111/19/2025
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
DKT CONTRACTORS LLC109/12/2025
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
Korean Mission to the UN112/11/2025
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
RIZZO GROUP112/11/2025
2 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 2Signed off 1Filed only 1
2 projects
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
M01321557 ↗335 EAST 45 STREET
MANHATTAN
AlterationFiled — no permit on record12/11/2025—
Owner Korean Mission to the UN
Filer RIZZO GROUP
—
M01280582 ↗15 WEST 51 STREET
MANHATTAN
AlterationSigned-off09/12/202510/03/2025
Contractor DKT CONTRACTORS LLC
General construction on 24th Fl as per plans filed herewith. No changes in use, egress or occupancy.
Click a row for this entity's own projects, plans and documents at that building.
BuildingFilingsMost Recent
335 EAST 45 STREET ↗111/19/2025
15 WEST 51 STREET ↗1—
▾Documents — 8 on file (BIS + DOB NOW)
▸Plans & Drawings2
▸DOB NOWPlans/Sketch2
08/21/2026M01280582-I1 · 15 WEST 51 STREETRequest digital key ↗
08/20/2026M01321557-I1 · 335 EAST 45 STREETRequest digital key ↗
▸Applications & Permits1
▸DOB NOWLPC Approval/Permit1
08/13/2026M01280582-I1 · 15 WEST 51 STREETOpen ↗
▸Seals & Professional Certifications2
▸DOB NOWDPL-1: Design Professional Seal & Signature2
08/21/2026M01280582-I1 · 15 WEST 51 STREETOpen ↗
08/13/2026M01321557-I1 · 335 EAST 45 STREETOpen ↗
▸Environmental & Asbestos1
▸DOB NOWDEP ACP-5: Asbestos Assessment Report1
08/21/2026M01280582-I1 · 15 WEST 51 STREETOpen ↗
▸Approvals, Objections & Sign-offs1
▸DOB NOWFee Exempt Supporting Document - DOF ACRIS report or BIB letter1
08/13/2026M01321557-I1 · 335 EAST 45 STREETOpen ↗
▸Other Documents1
▸DOB NOWProof of Historic Building1
08/13/2026M01280582-I1 · 15 WEST 51 STREETOpen ↗