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Design Firm
Golden Ratio Engineering LLC
Design
14 projects with open permitsBROOKLYN · 8MANHATTAN · 7
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12 of 13 buildings mapped
22
Total Filings
16
Projects on File
9
Buildings Worked
14
Projects w/ Open Permits
Design
Role
Activity
Projects by first filing month16 projects all-time
03710Aug '24 · 1Mar '26 · 1Aug '26 · 5Sep '26 · 9Aug '24Nov '24Feb '25May '25Aug '25Nov '25Feb '26May '26Aug '26Sep '26
bars = month · line = 3-mo average
Portfolio status
Browse projects →
Open permit1488%
Signed off16%
Filed only16%
By project type
Alteration8
ALT-CO - New Building with Existing Elements to Remain1
Alteration CO1
Most active buildings
All buildings →
222 EAST 21ST STREETBROOKLYN · 3 open · latest 09/25/2026
3 projects
54 EAST 66 STREETMANHATTAN · 2 open · latest 09/01/2026
2 projects
392 WEST BROADWAYMANHATTAN · 1 open · latest 08/13/2026
1 projects
212 BOWERYMANHATTAN · latest 09/02/2026
1 projects
346 MADISON AVENUEMANHATTAN · 1 open · latest 08/14/2026
1 projects
375 PARK AVENUEMANHATTAN · 1 open · latest 09/14/2026
1 projects
Key relationships
Everyone →
Design firms
1 projects
1 projects
1 projects
1 projects
Filing representatives
6 projects
3 projects
2 projects
2 projects
Contractors
3 projects
2 projects
2 projects
2 projects
Owners
4 projects
1 projects
1 projects
1 projects
People
All people →
Jhonatan Diaz-Santanalatest 09/21/2026
22 filings
Filed under
Golden Ratio Engineering LLC22
Identified by the contact ids of the people who file for the firm and by its email domain (goldenratioengineers.com), not by matching names.
Most recent projects
All projects →
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
B01455087 ↗222 EAST 21ST STREET
BROOKLYN
—Permit Issued—09/25/2026
Contractor BLUEWATER PLBG& HTG INC
Filer DOMINION EXPEDITING
#407 - Minor Water damage restoration of existing apartment. Plumbing to be filed subsequently. No change to use egress or occupancy.
B01460037 ↗222 EAST 21ST STREET
BROOKLYN
AlterationPermit Issued09/18/202609/25/2026
Contractor OZ CONTRACTING LLC
Filer DOMINION EXPEDITING
#210 - Minor Water damage restoration of existing apartment. Plumbing to be filed subsequently. No change to use egress or occupancy.
B01053883 ↗411 EAST 3 STREET
BROOKLYN
ALT-CO - New Building with Existing Elements to RemainPermit Issued08/14/202409/24/2026
Contractor SMBT LLC
Filer WM ARCH CORP
STRUCTURAL PLANS & SPECIFICATIONS IN CONJUCTION WITH ALTERATION #: B01053883-I1
B01378804 ↗637 ROCKAWAY PKWY
BROOKLYN
Alteration COPermit Issued03/29/202609/24/2026
Owner RUBI MANAGEMENT LLC
Contractor REVAMP NYC CORP
Filer EXPRESS FILING INC
Filing for construction fence in conjunction with DOB NOW Job Number B01378804-I1
X01462116 ↗BIN 2131381—Permit Issued—09/23/2026
Owner REVAMP NYC
Contractor REVAMP NYC CORP
Filer SHAHRISH SHUVO ENGINEERING P.C.
Pump Jack Scaffolding for proposed construction work in Conjunction with DOB NOW X01297411-I1
B01457188 ↗222 EAST 21ST STREET
BROOKLYN
—Permit Issued—09/22/2026
Contractor OZ CONTRACTING LLC
Filer DOMINION EXPEDITING
#401 - Minor Water damage restoration of existing apartment. Plumbing to be filed subsequently. No change to use egress or occupancy.
Counts cover all 16 projects (16 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
Jhonatan Diaz-Santana2209/21/2026
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
ASHER ARCHITECT106/22/2026
BORIS BALKHIYEV, PE105/27/2026
MOHAMMAD AHEAD, PE105/27/2026
PRAMODRAY SHAH, P.E.106/22/2026
ROBERT SIQECA PE106/22/2026
VASILIOS ARTEMIOU PE105/27/2026
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
OZ CONTRACTING LLC309/18/2026
BLUEWATER PLBG& HTG INC209/18/2026
REVAMP NYC CORP205/27/2026
TDC CONSTRUCTION INC208/21/2026
AFFINITY ASSOCIATES 1 INC1—
BG CONSTRUCTION NY INC109/11/2026
DYNAMIC EVENT GROUP, INC1—
F.S. SITE CORP108/10/2026
HARROW NY INC1—
MJM CONSTR ASSOCIATES LLC108/11/2026
SMBT LLC106/22/2026
STRUCTURE TONE, LLC108/11/2026
TRI CITY MECHANICAL GROUP106/22/2026
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
THE CASA GROUP408/21/2026
REVAMP NYC1—
RFR REALTY LLC1—
RUBI MANAGEMENT LLC105/27/2026
Rockefeller Group/Barclays108/11/2026
Sollevare Group1—
Who this entity's projects were filed with. Top 25 per group by shared jobs.
NameProjects togetherMost recent
THE CASA GROUP608/21/2026
DOMINION EXPEDITING309/18/2026
SHAHRISH SHUVO ENGINEERING P.C.205/27/2026
WM ARCH CORP209/11/2026
ADVANCED BUILDERS SERVICES109/02/2026
AGUDAS CHASIDES CHABAD1—
EMPIRE EXPEDITING LLC106/22/2026
EXPRESS FILING INC105/27/2026
METROPOLIS GROUP INC1—
16 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 16Open permit 14Signed off 1Filed only 1
Any typeAlteration 8ALT-CO - New Building with Existing Elements to Remain 1Alteration CO 1
16 projects
ProjectAddressTypeStatusFiledLatest permitOn the projectDescription
B01455087 ↗222 EAST 21ST STREET
BROOKLYN
—Permit Issued—09/25/2026
Contractor BLUEWATER PLBG& HTG INC
Filer DOMINION EXPEDITING
#407 - Minor Water damage restoration of existing apartment. Plumbing to be filed subsequently. No change to use egress or occupancy.
B01460037 ↗222 EAST 21ST STREET
BROOKLYN
AlterationPermit Issued09/18/202609/25/2026
Contractor OZ CONTRACTING LLC
Filer DOMINION EXPEDITING
#210 - Minor Water damage restoration of existing apartment. Plumbing to be filed subsequently. No change to use egress or occupancy.
B01053883 ↗411 EAST 3 STREET
BROOKLYN
ALT-CO - New Building with Existing Elements to RemainPermit Issued08/14/202409/24/2026
Contractor SMBT LLC
Filer WM ARCH CORP
STRUCTURAL PLANS & SPECIFICATIONS IN CONJUCTION WITH ALTERATION #: B01053883-I1
B01378804 ↗637 ROCKAWAY PKWY
BROOKLYN
Alteration COPermit Issued03/29/202609/24/2026
Owner RUBI MANAGEMENT LLC
Contractor REVAMP NYC CORP
Filer EXPRESS FILING INC
Filing for construction fence in conjunction with DOB NOW Job Number B01378804-I1
X01462116 ↗BIN 2131381—Permit Issued—09/23/2026
Owner REVAMP NYC
Contractor REVAMP NYC CORP
Filer SHAHRISH SHUVO ENGINEERING P.C.
Pump Jack Scaffolding for proposed construction work in Conjunction with DOB NOW X01297411-I1
B01457188 ↗222 EAST 21ST STREET
BROOKLYN
—Permit Issued—09/22/2026
Contractor OZ CONTRACTING LLC
Filer DOMINION EXPEDITING
#401 - Minor Water damage restoration of existing apartment. Plumbing to be filed subsequently. No change to use egress or occupancy.
B01458032 ↗2050 58 STREET
BROOKLYN
AlterationPermit Issued09/11/202609/15/2026
Contractor BG CONSTRUCTION NY INC
Filer WM ARCH CORP
REPAIRING THE FACADE. RECONSTRUCTING THE EXISTING FACADE WALL AS NEEDED. WORK AS PER PLAN.
M01455184 ↗375 PARK AVENUE
MANHATTAN
—Permit Issued—09/14/2026
Owner RFR REALTY LLC
Contractor DYNAMIC EVENT GROUP, INC
Filer METROPOLIS GROUP INC
INSTALLATION OF TEMPORARY VERSALITE PLATFORM SYSTEM. NO CHANGE TO USE, EGRESS OR OCCUPANCY.
B01453604 ↗363 6 AVENUE
BROOKLYN
—Permit Issued—09/10/2026
Owner Sollevare Group
Contractor HARROW NY INC
Filer THE CASA GROUP
REPAIR OF MASONRY WALLS AND COLUMNS. REMOVAL AND REPLACEMENT OF 1ST FLOOR CONCRETE SLAB
B01454168 ↗784 EASTERN PARKWAY
BROOKLYN
—Signed-off—09/09/2026
Contractor AFFINITY ASSOCIATES 1 INC
Filer AGUDAS CHASIDES CHABAD
APPLICATION FILED FOR PERMANENT BACKFILLING, BRACING, AND SHORING OF AN EXCAVATION APPROXIMATELY 4 FEET DEEP AND 60 FEET LONG, AT REAR OF 1S…
M01453526 ↗212 BOWERY
MANHATTAN
AlterationFiled — no permit on record09/02/2026—
Filer ADVANCED BUILDERS SERVICES
—
M01448100 ↗54 EAST 66 STREET
MANHATTAN
AlterationPermit Issued08/21/202609/01/2026
Owner THE CASA GROUP
Contractor TDC CONSTRUCTION INC
Filer THE CASA GROUP
INSTALLATION OF TEMPORARY WEATHER WALLS
M01448083 ↗54 EAST 66 STREET
MANHATTAN
AlterationPermit Issued08/21/202608/25/2026
Owner THE CASA GROUP
Contractor TDC CONSTRUCTION INC
Filer THE CASA GROUP
INSTALLATION OF TEMPORARY PLYWOOD CONSTRUCTION FENCE
M01438214 ↗346 MADISON AVENUE
MANHATTAN
AlterationPermit Issued08/10/202608/14/2026
Owner THE CASA GROUP
Contractor F.S. SITE CORP
Filer THE CASA GROUP
Install temporary dry standpipe system with air pressurized alarm system during renovation of the building.
M01443602 ↗392 WEST BROADWAY
MANHATTAN
AlterationPermit Issued08/11/202608/13/2026
Owner THE CASA GROUP
Contractor MJM CONSTR ASSOCIATES LLC
Filer THE CASA GROUP
INSTALLATION OF TEMPORARY PLYWOOD CONSTRUCTION FENCE
M01442023 ↗745 7 AVENUE
MANHATTAN
AlterationPermit Issued08/11/202608/12/2026
Owner Rockefeller Group/Barclays
Contractor STRUCTURE TONE, LLC
Filer THE CASA GROUP
CONSTRUCTION OF TEMPORARY WALLS AT GROUND FLOOR LOBBY
Scope of Work
HVAC — 1 project · most recent 06/22/2026
Heating and Air Conditioning Systems Ventilation Systems
Sprinkler / Standpipe — 2 projects · most recent 08/10/2026
Sprinkler System
Plumbing — 4 projects · most recent 09/18/2026
Water/Sanitary Gas Storm
Structural — 2 projects · most recent 09/02/2026
Steel
Fence / Scaffold / Sign / Shed — 2 projects · most recent 08/11/2026
Fence
Click a row for this entity's own projects, plans and documents at that building.
BuildingFilingsMost Recent
346 MADISON AVENUE ↗209/21/2026
222 EAST 21ST STREET ↗209/15/2026
2050 58 STREET ↗109/10/2026
212 BOWERY ↗209/08/2026
637 ROCKAWAY PKWY ↗208/31/2026
54 EAST 66 STREET ↗208/19/2026
392 WEST BROADWAY ↗108/10/2026
745 7 AVENUE ↗108/06/2026
411 EAST 3 STREET ↗107/20/2026
▾Documents — 105 on file (BIS + DOB NOW)
▸Plans & Drawings23
▸DOB NOWPlans/Sketch23
09/21/2026B01460037-I1 · 222 EAST 21ST STREETRequest digital key ↗
09/21/2026B01460037-S1 · 222 EAST 21ST STREETRequest digital key ↗
09/14/2026B01458032-I1 · 2050 58 STREETRequest digital key ↗
Showing 3 of 23 on file for this type
▸Applications & Permits1
▸DOB NOWLPC Approval/Permit1
08/22/2026M01448100-I1 · 54 EAST 66 STREETOpen ↗
▸Zoning, Tax Lot & Property Records4
▸DOB NOWZD1: DOB Zoning Diagram2
On file, but not among the 200 most recently loaded documents for this source.
Showing 0 of 2 on file for this type
▸DOB NOWHouse Number Verification: TOPO Stamp2
On file, but not among the 200 most recently loaded documents for this source.
Showing 0 of 2 on file for this type
▸Seals & Professional Certifications60
▸DOB NOWDPL-1: Design Professional Seal & Signature32
09/27/2026B01053883-Z3 · 411 EAST 3 STREETOpen ↗
09/26/2026B01378804-S5 · 637 ROCKAWAY PKWYOpen ↗
09/24/2026X01462116-I1Open ↗
Showing 3 of 32 on file for this type
▸DOB NOWProgress Inspector Seal & Signature20
09/25/2026B01460037-I1 · 222 EAST 21ST STREETOpen ↗
09/25/2026B01460037-I1 · 222 EAST 21ST STREETOpen ↗
09/23/2026B01457188-I1Open ↗
Showing 3 of 20 on file for this type
▸DOB NOWSpecial Inspector Seal & Signature8
09/25/2026B01460037-I1 · 222 EAST 21ST STREETOpen ↗
09/24/2026M01438214-I1 · 346 MADISON AVENUEOpen ↗
09/23/2026B01457188-I1Open ↗
Showing 3 of 8 on file for this type
▸Trade Schedules & Equipment2
▸DOB NOWDEP: Sewer Certification (Sanitary/Storm)2
On file, but not among the 200 most recently loaded documents for this source.
Showing 0 of 2 on file for this type
▸Safety & Tenant Protection3
▸DOB NOWParks Department Acknowledgment Letter for Street Trees Plan2
08/16/2026B01378804-I1 · 637 ROCKAWAY PKWYOpen ↗
Showing 1 of 2 on file for this type
▸DOB NOWStreet Tree Checklist1
08/16/2026B01378804-I1 · 637 ROCKAWAY PKWYOpen ↗
▸Environmental & Asbestos3
▸DOB NOWDEP ACP-5: Asbestos Assessment Report3
09/11/2026B01453604-I1Open ↗
08/22/2026M01448100-I1 · 54 EAST 66 STREETOpen ↗
08/16/2026M01438214-I1 · 346 MADISON AVENUEOpen ↗
▸Approvals, Objections & Sign-offs1
▸DOB NOWFee Exempt Supporting Document - DOF ACRIS report or BIB letter1
09/10/2026B01454168-I1Open ↗
▸Other Documents8
▸DOB NOWProperty Ownership Certification3
08/16/2026B01378804-I1 · 637 ROCKAWAY PKWYOpen ↗
Showing 1 of 3 on file for this type
▸DOB NOWSite Survey: Initial3
09/01/2026B01053883-I1 · 411 EAST 3 STREETOpen ↗
Showing 1 of 3 on file for this type
▸DOB NOWLocal Law 92/94 of 2019 Sustainable Roof Zone2
On file, but not among the 200 most recently loaded documents for this source.
Showing 0 of 2 on file for this type