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Design Firm
HAHN ENGINEERING, PC
Design
4 jobs with open permitsMANHATTAN · 4BROOKLYN · 3BRONX · 1
9 buildings
9
Total Filings
9
Jobs on File
9
Buildings Worked
4
Jobs w/ Open Permits
Design
Role
Activity
Jobs by first filing month9 jobs all-time
0112Jan '25 · 1Feb '25 · 1Jun '25 · 1Oct '25 · 1Nov '25 · 1Dec '25 · 1Jan '26 · 1Feb '26 · 1Apr '26 · 1Jan '25Mar '25May '25Jul '25Sep '25Nov '25Jan '26Mar '26Apr '26
bars = month · line = 3-mo average
Portfolio status
Browse jobs →
Open permit444%
Signed off222%
Filed only333%
By job type
Alteration9
Most active buildings
All buildings →
127 2 AVENUEMANHATTAN · latest 10/14/2025
1 jobs
28 7 AVENUE SOUTHMANHATTAN · latest 02/24/2026
1 jobs
70 7 AVENUEMANHATTAN · latest 04/08/2026
1 jobs
3 EAST 53 STREETMANHATTAN · 1 open · latest 01/26/2026
1 jobs
416 EAST 189 STREETBRONX · latest 07/09/2025
1 jobs
114 MONTAGUE STREETBROOKLYN · 1 open · latest 02/02/2026
1 jobs
Moon Hahnlatest 04/02/2026
6 filings
Moon Hahnlatest 12/01/2025
2 filings
Most recent jobs
All jobs →
JobAddressTypeStatusFiledLatest permitDescription
M01382091 ↗70 7 AVENUE
MANHATTAN
AlterationFiled — no permit on record04/08/2026——
M01358327 ↗28 7 AVENUE SOUTH
MANHATTAN
AlterationFiled — no permit on record02/24/2026——
B01344589 ↗250 JOHNSON AVENUE
BROOKLYN
AlterationPermit Issued01/27/202602/20/2026FILING FOR COMMERCIAL KITCHEN RANGEHOOD VENTILATION SYSTEM FOR REGALIS FOODS IN CONJUNCTION WITH ALT CO JOB#B01186871, AS SHOWN ON PLAN.
B01326307 ↗114 MONTAGUE STREET
BROOKLYN
AlterationPermit Issued12/08/202502/02/2026FILING TO UPGRADE EXISTING COMMERCIAL KITCHEN RANGEHOOD EXHAUST SYSTEM FOR LASSEN & HENNINGS, AS SHOWN ON PLANS.
M01308915 ↗3 EAST 53 STREET
MANHATTAN
AlterationPermit Issued11/14/202501/26/2026FILING FOR NEW COMMERCIAL KITCHEN RANGEHOOD EXHAUST SYSTEM FOR WILLIAM S PALEY FOUNDATION/PALEY PARK SNACK STAND, AS SHOWN ON PLAN.
M01299738 ↗127 2 AVENUE
MANHATTAN
AlterationFiled — no permit on record10/14/2025——
Counts cover all 9 jobs (9 DOB NOW). Dated by first filing; BIS jobs by first permit issuance.
9 DOB NOW jobs, anchored the same way as Buildings Worked. Status is the job's permit state today: open = at least one permit currently issued. BIS jobs show their raw permit status and are not counted as open.
All 9Open permit 4Signed off 2Filed only 3
9 jobs
JobAddressTypeStatusFiledLatest permitDescription
M01382091 ↗70 7 AVENUE
MANHATTAN
AlterationFiled — no permit on record04/08/2026——
M01358327 ↗28 7 AVENUE SOUTH
MANHATTAN
AlterationFiled — no permit on record02/24/2026——
B01344589 ↗250 JOHNSON AVENUE
BROOKLYN
AlterationPermit Issued01/27/202602/20/2026FILING FOR COMMERCIAL KITCHEN RANGEHOOD VENTILATION SYSTEM FOR REGALIS FOODS IN CONJUNCTION WITH ALT CO JOB#B01186871, AS SHOWN ON PLAN.
B01326307 ↗114 MONTAGUE STREET
BROOKLYN
AlterationPermit Issued12/08/202502/02/2026FILING TO UPGRADE EXISTING COMMERCIAL KITCHEN RANGEHOOD EXHAUST SYSTEM FOR LASSEN & HENNINGS, AS SHOWN ON PLANS.
M01308915 ↗3 EAST 53 STREET
MANHATTAN
AlterationPermit Issued11/14/202501/26/2026FILING FOR NEW COMMERCIAL KITCHEN RANGEHOOD EXHAUST SYSTEM FOR WILLIAM S PALEY FOUNDATION/PALEY PARK SNACK STAND, AS SHOWN ON PLAN.
M01299738 ↗127 2 AVENUE
MANHATTAN
AlterationFiled — no permit on record10/14/2025——
B01175940 ↗102 KOSCIUSZKO STREET
BROOKLYN
AlterationSigned-off02/19/202510/02/2025FILING FOR KITCHEN RANGEHOOD VENTILATION SYSTEMS FOR THE SALVATION ARMY(COMMUNITY FACILITY), AS SHOWN ON PLANS. NO CHANGE IN USE, OCCUPANCY…
X01228012 ↗416 EAST 189 STREET
BRONX
AlterationSigned-off06/05/202507/09/2025FILING FOR COMMERCIAL KITCHEN RANGEHOOD VENTILATION SYSTEM FOR IHOP, AS SHOWN ON PLANS. NO CHANGE IN USE, OCCUPANCY, OR EGRESS. ALT-CO AP…
Q01167405 ↗82-68 164 STREET
QUEENS
AlterationPermit Issued01/23/202502/28/2025FILING FOR INSTALLATION OF COMMERCIAL KITCHEN RANGEHOOD VENTILATION SYSTEM FOR CAFE AT QUEENS HOSPITAL CENTER. NO CHANGE IN USE, OCCUPANCY,…
Scope of Work
HVAC — 5 jobs · most recent 04/08/2026
Ventilation Systems
Earthwork — 1 job · most recent 12/08/2025
Tenant Protection Plan 72 Hour
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
Moon Hahn604/02/2026
Moon Hahn212/01/2025
Who this entity's jobs were filed with. Top 25 per group by shared jobs.
NameJobs togetherMost recent
CHIEF FIRE PREVENTION & M501/27/2026
CT IDEAL SUPPRESSION112/08/2025
Who this entity's jobs were filed with. Top 25 per group by shared jobs.
NameJobs togetherMost recent
70 7 AVE LP104/08/2026
EB PROPERTY MANAGEMENT LLC102/24/2026
MORNINGSIDE CONSTRUCTION LLC106/05/2025
RYCO CAPITAL110/14/2025
Seagis Property Group101/27/2026
The Salvation Army102/19/2025
WILLIAM S PALEY FOUNDATION111/14/2025
Click a row for this entity's own jobs, plans and documents at that building.
BuildingFilingsMost Recent
70 7 AVENUE ↗104/02/2026
28 7 AVENUE SOUTH ↗102/11/2026
250 JOHNSON AVENUE ↗101/09/2026
114 MONTAGUE STREET ↗112/01/2025
3 EAST 53 STREET ↗110/27/2025
127 2 AVENUE ↗110/08/2025
416 EAST 189 STREET ↗105/19/2025
102 KOSCIUSZKO STREET ↗102/04/2025
82-68 164 STREET ↗1—
▾Documents — 47 on file (BIS + DOB NOW)
▸Plans & Drawings9
▸DOB NOWPlans/Sketch9
08/22/2026B01175940-I1Request digital key ↗
08/21/2026M01299738-I1Request digital key ↗
08/21/2026Q01167405-I1Request digital key ↗
Showing 3 of 9 on file for this type
▸Applications & Permits2
▸DOB NOWLPC Approval/Permit2
08/13/2026B01326307-I1Open ↗
08/13/2026M01299738-I1Open ↗
▸Seals & Professional Certifications24
▸DOB NOWSpecial Inspector Seal & Signature10
09/23/2026B01326307-I1Open ↗
09/23/2026B01326307-I1Open ↗
09/23/2026M01308915-I1Open ↗
Showing 3 of 10 on file for this type
▸DOB NOWDPL-1: Design Professional Seal & Signature9
09/06/2026M01382091-I1Open ↗
08/21/2026M01299738-I1Open ↗
08/21/2026Q01167405-I1Open ↗
Showing 3 of 9 on file for this type
▸DOB NOWProgress Inspector Seal & Signature5
09/23/2026B01344589-I1Open ↗
09/23/2026B01326307-I1Open ↗
09/23/2026M01308915-I1Open ↗
Showing 3 of 5 on file for this type
▸Safety & Tenant Protection1
▸DOB NOWHPD-3: Single Room Occupancy Multiple Dwelling (SRO MD) Anti-Harassment Checklist1
08/15/2026M01382091-I1Open ↗
▸Environmental & Asbestos8
▸DOB NOWDEP ACP-5: Asbestos Assessment Report8
08/21/2026M01299738-I1Open ↗
08/19/2026B01326307-I1Open ↗
08/18/2026B01344589-I1Open ↗
Showing 3 of 8 on file for this type
▸Approvals, Objections & Sign-offs3
▸DOB NOWFee Exempt Supporting Document - DOF ACRIS report or BIB letter3
08/21/2026Q01167405-I1Open ↗
08/13/2026B01175940-I1Open ↗
08/13/2026M01308915-I1Open ↗