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Filing Representative Firm
HJ DESIGN STUDIO CORP.
Expediter
1 project with open permitsBROOKLYN · 2
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2 buildings
2
Total Filings
2
Projects on File
2
Buildings Worked
1
Projects w/ Open Permits
Expediter
Role
Activity
Projects by first filing month2 projects all-time
0112Apr '26 · 1Jun '26 · 1Apr '26May '26Jun '26
Portfolio status
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Open permit150%
Filed only150%
By project type
Alteration1
Alteration CO1
Most active buildings
All buildings →
2107 67 STREETBROOKLYN · latest 06/26/2026
1 projects
2317 EAST 17 STREETBROOKLYN · 1 open · latest 07/22/2026
1 projects
Key relationships
Everyone →
Design firms
2 projects
Contractors
1 projects
People
All people →
MAO HONG CHENlatest 06/04/2026
2 filings
Most recent projects
All projects →
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
B01391667 ↗2317 EAST 17 STREET
BROOKLYN
AlterationPermit Issued04/27/202607/22/2026
Design POLAR ENGINEERING, P.C.
Owner HJ DESIGN STUDIO CORP.
Contractor ROCKLEDGE SCAFFOLD CORP
REMOVE PARTIAL WOODSHED IN REAR YARD AND WINDOW IN FRONT PORCH. NO CHANGE IN EGRESS, USE, OR OCCUPANCY.
B01412574 ↗2107 67 STREET
BROOKLYN
Alteration COFiled — no permit on record06/26/2026—
Design POLAR ENGINEERING, P.C.
Owner HJ DESIGN STUDIO CORP.
—
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
MAO HONG CHEN206/04/2026
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
POLAR ENGINEERING, P.C.206/26/2026
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
WELLDONE INSPECTIONS INC104/27/2026
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 2Open permit 1Filed only 1
Any typeAlteration 1Alteration CO 1
2 projects
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
B01391667 ↗2317 EAST 17 STREET
BROOKLYN
AlterationPermit Issued04/27/202607/22/2026
Design POLAR ENGINEERING, P.C.
Owner HJ DESIGN STUDIO CORP.
Contractor ROCKLEDGE SCAFFOLD CORP
REMOVE PARTIAL WOODSHED IN REAR YARD AND WINDOW IN FRONT PORCH. NO CHANGE IN EGRESS, USE, OR OCCUPANCY.
B01412574 ↗2107 67 STREET
BROOKLYN
Alteration COFiled — no permit on record06/26/2026—
Design POLAR ENGINEERING, P.C.
Owner HJ DESIGN STUDIO CORP.
—
Click a row for this entity's own projects, plans and documents at that building.
BuildingFilingsMost Recent
2107 67 STREET ↗106/04/2026
2317 EAST 17 STREET ↗104/23/2026
▾Documents — 9 on file (BIS + DOB NOW)
▸Plans & Drawings2
▸DOB NOWPlans/Sketch2
09/03/2026B01391667-I1 · 2317 EAST 17 STREETRequest digital key ↗
08/15/2026B01412574-I1 · 2107 67 STREETRequest digital key ↗
▸Zoning, Tax Lot & Property Records1
▸DOB NOWRestrictive Declaration/Easement 11
08/15/2026B01412574-I1 · 2107 67 STREETOpen ↗
▸Seals & Professional Certifications4
▸DOB NOWDPL-1: Design Professional Seal & Signature2
09/03/2026B01391667-I1 · 2317 EAST 17 STREETOpen ↗
08/16/2026B01412574-I1 · 2107 67 STREETOpen ↗
▸DOB NOWSpecial Inspector Seal & Signature1
08/26/2026B01391667-I1 · 2317 EAST 17 STREETOpen ↗
▸DOB NOWProgress Inspector Seal & Signature1
08/26/2026B01391667-I1 · 2317 EAST 17 STREETOpen ↗
▸Environmental & Asbestos1
▸DOB NOWDEP ACP-5: Asbestos Assessment Report1
08/15/2026B01412574-I1 · 2107 67 STREETOpen ↗
▸Other Documents1
▸DOB NOWFinal Survey1
08/15/2026B01412574-I1 · 2107 67 STREETOpen ↗