| Owner | Filings | Most Recent |
|---|---|---|
| SL Green Realty | 587 | 03/21/2026 |
| 521 Fifth Avenue Partners | 57 | 03/21/2026 |
| 521 5th AV | 34 | 03/21/2026 |
| RFR Realty LLC, As Agent | 17 | 03/21/2026 |
| Silverstein Properties | 16 | 03/21/2026 |
| 345 Park A | 14 | 03/21/2026 |
| 521 Fifth | 13 | 03/21/2026 |
| 521 Fifth Ave Associates | 13 | 03/21/2026 |
| RFR Realty | 10 | 03/21/2026 |
| 219 East 67th Street | 6 | 03/21/2026 |
| 18 East 41st Street Partners | 6 | 03/21/2026 |
| 521 Fifth Avenue Property Inv IV | 3 | 03/22/2026 |
| Savanna | 3 | 03/21/2026 |
| 521 5 Ave Associates Silverstein Properties | 3 | 03/21/2026 |
| 390 Park Avenue Partners | 1 | 03/21/2026 |
| VP of Construction | 1 | 03/21/2026 |
| 5th Avenue | 1 | 03/21/2026 |
| Date | Price | Unit | Seller → Buyer | $/sf |
|---|---|---|---|---|
| 05/22/2019 | $379.3M | — | 521 FIFTH FEE OWNER LLC → 521 FIFTH AVENUE PROPERTY INVESTORS IV, LLC | $874/sf building |
| Firm | Filings | Most Recent |
|---|---|---|
| P&L Associates | 1 | 08/18/2026 |
| Ronald Villano Architect | 1 | 06/05/2026 |
| Gensler | 2 | 09/30/2025 |
| MG Engineering | 47 | 07/28/2025 |
| Fogarty Finger Architecture | 19 | 03/28/2024 |
| Enthink Engineers | 1 | 09/27/2023 |
| Gace | 2 | 06/21/2022 |
| CKC Associates LLP C/O FS Restoration | 5 | 11/11/2020 |
| Green Design | 2 | 08/14/2020 |
| Urban Integrations | 1 | 07/30/2020 |
| Agencie Group | 1 | 01/27/2020 |
| Loffredo Brooks Architects | 1 | 11/15/2019 |
| Paul Perdek, Prof. Engineering | 1 | 03/09/2018 |
| Representative | Filings | Most Recent |
|---|---|---|
| Milrose Consultants | 89 | 03/21/2026 |
| AE Design Solution | 2 | 03/21/2026 |
| Smep Design & Consultation | 2 | 03/21/2026 |
| United Safety Consultants | 1 | 03/21/2026 |
| Firm | Trade | Roles | Most Recent |
|---|---|---|---|
| Savcon | General Contractor | 89 | 07/08/2026 |
| Spring Scaffolding | Scaffold | 16 | 07/08/2026 |
| Enobrac Plumbing | Fire Protection | 11 | 07/08/2026 |
| B Deopaul's General Construction | General Contractor | 8 | 08/30/2026 |
| Vanquish Group | General Contractor | 8 | 07/08/2026 |
| Solution Mechanical Contng | Plumbing | 7 | 07/08/2026 |
| Enobrac Plumbing | Plumbing | 7 | 07/08/2026 |
| Five Boro Associates | Fire Protection | 7 | 07/08/2026 |
| Exa USA | General Contractor | 4 | 07/08/2026 |
| Andamio Scaffolding | Scaffold | 3 | 03/21/2026 |
| Everest Scaffolding | Scaffold | 3 | 07/08/2026 |
| Metropolis Electric | Electrical | 2 | 03/22/2026 |
| Par Plumbing Co., Inc.o | Fire Protection | 2 | 03/21/2026 |
| Artic Electric | Electrical | 1 | 03/21/2026 |
| R.N.R. Associates | Electrical | 1 | 03/21/2026 |
| Blue City Construction | General Contractor | 1 | 07/08/2026 |
| Walton Electrical Construction | Electrical | 1 | 03/21/2026 |
| Spieler & Ricca Electrical Co | Electrical | 1 | 03/21/2026 |
| P.S. Marcato Elev. Co | Electrical | 1 | 03/21/2026 |
| Advanced Plumbing, Mechanical & Sprinkler | Fire Protection | 1 | 07/08/2026 |
| Advanced Plumbing Mechanical | Plumbing | 1 | 07/08/2026 |
| Agency | License # | Filings | Most Recent |
|---|---|---|---|
| Prudigm Engineering Llcu | 4304 | 1 | 08/18/2026 |
| Buildtech Engineering | 6369 | 1 | 06/05/2026 |
| Milrose Consultants | 2003 | 26 | 09/30/2025 |
| DNA Controlled Inspection | 554 | 4 | 03/28/2024 |
| Special Inspection Services | 1200 | 39 | 04/24/2023 |
| Source | Work Type | Status | Applicant | Issued |
|---|---|---|---|---|
| DOB NOW | General Construction | Permit Issued | B Deopaul's General Construction | 08/27/2026 |
| DOB NOW | General Construction | Permit Issued | Blue City Construction | 06/08/2026 |
| DOB NOW | General Construction | Permit Issued | B Deopaul's General Construction | 03/20/2026 |
| DOB NOW | Suspended Scaffold | Permit Issued | Structural Preservation S | 02/24/2026 |
| DOB NOW | General Construction | Permit Issued | B Deopaul's General Construction | 11/13/2025 |
| DOB NOW | Mechanical Systems | Permit Issued | B Deopaul's General Construction | 08/14/2025 |
| DOB NOW | Mechanical Systems | Signed-off | B Deopaul's General Construction | 05/15/2024 |
| DOB NOW | General Construction | Signed-off | B Deopaul's General Construction | 05/14/2024 |
| DOB NOW | Mechanical Systems | Signed-off | Savcon | 04/05/2024 |
| DOB NOW | Plumbing | Signed-off | Solution Mechanical Contng | 04/03/2024 |
| DOB NOW | General Construction | Signed-off | Savcon | 04/02/2024 |
| DOB NOW | Mechanical Systems | Signed-off | Savcon | 03/13/2024 |
| DOB NOW | Supported Scaffold | Signed-off | Andamio Scaffolding | 09/27/2023 |
| DOB NOW | General Construction | Signed-off | Savcon | 02/22/2023 |
| DOB NOW | General Construction | Signed-off | Savcon | 02/02/2023 |
| DOB NOW | Mechanical Systems | Signed-off | Savcon | 11/11/2022 |
| DOB NOW | Sprinklers | Signed-off | Advanced Plumbing, Mechanical & Sprinkler | 11/07/2022 |
| DOB NOW | Plumbing | Signed-off | Advanced Plumbing Mechanical | 11/07/2022 |
| DOB NOW | General Construction | Signed-off | Savcon | 10/11/2022 |
| DOB NOW | Plumbing | Signed-off | Solution Mechanical Contng | 08/22/2022 |
| DOB NOW | Sprinklers | Signed-off | Five Boro Associates | 08/22/2022 |
| DOB NOW | Mechanical Systems | Signed-off | Savcon | 08/10/2022 |
| DOB NOW | General Construction | Signed-off | Savcon | 08/10/2022 |
| DOB NOW | Mechanical Systems | Signed-off | Savcon | 07/14/2022 |
| DOB NOW | General Construction | Signed-off | Savcon | 07/14/2022 |
| DOB NOW | Mechanical Systems | Signed-off | Savcon | 07/14/2022 |
| DOB NOW | Mechanical Systems | Signed-off | Savcon | 07/14/2022 |
| DOB NOW | General Construction | Signed-off | Savcon | 07/14/2022 |
| DOB NOW | General Construction | Signed-off | Savcon | 07/14/2022 |
| DOB NOW | Structural | Signed-off | Savcon | 07/06/2022 |
| DOB NOW | Mechanical Systems | Signed-off | Savcon | 06/16/2022 |
| DOB NOW | General Construction | Signed-off | Savcon | 06/16/2022 |
| DOB NOW | Mechanical Systems | Signed-off | Savcon | 06/15/2022 |
| DOB NOW | General Construction | Signed-off | Savcon | 06/15/2022 |
| DOB NOW | Plumbing | Signed-off | Solution Mechanical Contng | 05/19/2022 |
| DOB NOW | Sprinklers | Signed-off | Five Boro Associates | 05/19/2022 |
| DOB NOW | Plumbing | Signed-off | Solution Mechanical Contng | 05/19/2022 |
| DOB NOW | Sprinklers | Signed-off | Five Boro Associates | 05/18/2022 |
| DOB NOW | Mechanical Systems | Signed-off | Savcon | 05/10/2022 |
| DOB NOW | General Construction | Signed-off | Savcon | 05/09/2022 |
| Filed | Status | Contractor | Scope |
|---|---|---|---|
| 07/28/2025 | — | — | 11 heads |
| Filed | Status | Contractor | Scope |
|---|---|---|---|
| 07/28/2025 | — | — | — |
| Filed | Status | Contractor | Scope |
|---|---|---|---|
| 04/27/2026 | Permit Issued | Joseph Weinstein Electric | General Wiring |
| 04/03/2024 | Complete | Metropolis Electric | General Wiring |
| 03/10/2023 | Permit Issued | Leader Electric Co | — |
| 11/15/2022 | Complete | Metropolis Electric | General Wiring |
| 11/07/2022 | Permit Issued | Team Electric | General Wiring |
| 08/18/2022 | Permit Issued | Team Electric | General Wiring |
| 08/18/2022 | Permit Issued | Team Electric | — |
| 08/17/2022 | Permit Issued | Agir Electrical Ltd D/B/A | — |
| 06/22/2022 | Permit Issued | Team Electric | General Wiring |
| 06/22/2022 | Permit Issued | Team Electric | General Wiring |
| 03/11/2022 | Permit Issued | Team Electric | General Wiring |
| 11/11/2021 | Permit Issued | Right Away Electric | General Wiring |
| 09/20/2021 | Permit Issued | Team Electric | General Wiring |
| 07/01/2021 | Permit Issued | Team Electric | General Wiring |
| 03/18/2021 | Complete | Metropolis Electric | General Wiring |
| Date | Type | Result | Report |
|---|---|---|---|
| 07/31/2024 | Certified Water and Sanitary-WS-Fixtures-Finish | Certified | View ↗ |
| 04/16/2024 | Certified Water and Sanitary-WS-Sanitary Piping-Roughing | Certified | View ↗ |
| 09/01/2023 | Pass-Final SP - Up to 3 Requested Floors | Pass | View ↗ |
| 04/25/2023 | Certified Sprinkler-SP-Piping Dry/Wet-Hydrostatic Test | Certified | View ↗ |
| 03/16/2023 | Certified Water and Sanitary-WS-Fixtures-Finish | Certified | View ↗ |
| 01/24/2023 | Pass-Final PL - Up to 3 Requested Floors | Pass | View ↗ |
| 01/04/2023 | Pass-Final PL - Up to 3 Requested Floors | Pass | View ↗ |
| 12/23/2022 | Certified Water and Sanitary-WS-Sanitary Piping-Roughing | Certified | View ↗ |
| 12/02/2022 | Certified Water and Sanitary-WS-Fixtures-Finish | Certified | View ↗ |
| 10/27/2022 | Certified Sprinkler-SP-Fixtures-Finish | Certified | View ↗ |
| 10/25/2022 | Certified Remove/Cap - work done in accordance with code | Certified | View ↗ |
| 10/25/2022 | Certified Sprinkler-SP-Piping Dry/Wet-Hydrostatic Test | Certified | View ↗ |
| 09/02/2022 | Certified Water and Sanitary-WS-Sanitary Piping-Roughing | Certified | View ↗ |
| 08/05/2022 | Certified Water and Sanitary-WS-Sanitary Piping-Roughing | Certified | View ↗ |
| 07/20/2022 | Certified Water and Sanitary-WS-Sanitary Piping-Roughing | Certified | View ↗ |
| 07/11/2022 | Certified Water and Sanitary-WS-Fixtures-Finish | Certified | View ↗ |
| 06/29/2022 | Certified StandPipe-SD-Fixtures-Finish-SD | Certified | View ↗ |
| 06/24/2022 | Certified StandPipe-SD-Piping-Hydrostatic Test | Certified | View ↗ |
| 04/29/2022 | Certified Sprinkler-SP-Piping Dry/Wet-Hydrostatic Test | Certified | View ↗ |
| 03/29/2022 | Certified Water and Sanitary-WS-Sanitary Piping-Roughing | Certified | View ↗ |
| 02/01/2022 | Certified Sprinkler-SP-Fixtures-Finish | Certified | View ↗ |
| 01/05/2022 | Certified Water and Sanitary-WS-Fixtures-Finish | Certified | View ↗ |
| 12/21/2021 | Certified Sprinkler-SP-Fixtures-Finish | Certified | View ↗ |
| 12/16/2021 | Certified Remove/Cap - work done in accordance with code | Certified | View ↗ |
| 12/16/2021 | Certified Sprinkler-SP-Piping Dry/Wet-Hydrostatic Test | Certified | View ↗ |
| Date | Requirement | Inspector | Role |
|---|---|---|---|
| 08/18/2026 | Fire-Resistant Penetrations and Joints | Naeem Anwar | special |
| 08/18/2026 | Fire-Resistance Rated Construction | Naeem Anwar | progress |
| 07/29/2026 | Final | Naeem Anwar | progress |
| 06/01/2026 | Tenant Protection Plan Compliance | Luis Pichardo | special |
| 06/01/2026 | Fire-Resistant Penetrations and Joints | Luis Pichardo | special |
| 05/30/2026 | Energy Code Compliance Inspections | Luis Pichardo | progress |
| 05/30/2026 | Final | RONALD VILLANO | progress |
| 04/07/2025 | Energy Code Compliance Inspections | Christopher Drutjons | progress |
| 04/07/2025 | Duct leakage testing, insulation and design | Christopher Drutjons | energy_progress |
| 04/07/2025 | Lighting controls | Christopher Drutjons | energy_progress |
| 04/07/2025 | Interior lighting power | Christopher Drutjons | energy_progress |
| 04/07/2025 | Post-installed Anchors | Christopher Drutjons | special |
| 04/07/2025 | Fire-Resistant Penetrations and Joints | Christopher Drutjons | special |
| 04/07/2025 | Post-installed Anchors | Christopher Drutjons | special |
| 03/25/2025 | Sprinkler Systems | Christopher Drutjons | special |
| 03/25/2025 | Mechanical Systems | Christopher Drutjons | special |
| 03/25/2025 | Final | Christopher Drutjons | progress |
| 07/25/2024 | Mechanical Systems | Christopher Drutjons | special |
| 07/25/2024 | Final | Christopher Drutjons | progress |
| 07/25/2024 | Post-installed Anchors | Christopher Drutjons | special |
| 07/17/2024 | Mechanical Systems | Christopher Drutjons | special |
| 07/17/2024 | Post-installed Anchors | Christopher Drutjons | special |
| 07/17/2024 | Final | Christopher Drutjons | progress |
| 05/01/2024 | Final | Stephanie Lan | progress |
| 05/01/2024 | Post-installed Anchors | Christopher Drutjons | special |
| Tenant | Space | Floors | Renovation projects |
|---|---|---|---|
| Genpact | Office | Floor 14 | Project M01198886 Project M01200262 Project M01200317 Project M01044831 Project M01044828 |
| Savanna | Office | Floors 1, 10 | Project M01019335 Project M01019364 Project M01021735 Project M00285098 Project M00285126 Project M00285193 |
| Tethys | Office | Floor 37 | Project M07995595 Project M07994948 Project M07995928 |
| Teza | Office | Floor 22 | Project M00696332 Project M00703550 |
| Berkadia | Office | Floor 16 | Project M00672997 Project M00673099 Project M00673177 |
| BlueStar Remodification | Office | Floor 25 | Project M00593432 Project M00593448 Project M00593943 |
| Quincannon | Office | Floor 24 | Project M00593417 Project M00594061 Project M00594074 |
| Reevemark | Office | Floor 27 | Project M00572157 Project M00580024 Project M00580063 |
| K&LGroup | Office | Floor 34 | Project M00478140 Project M00478111 Project M00478166 |
| Unified Technologies | Office | Floor 14 | Project M00371389 Project M00371413 |
| 360 Trading Networks | Office | Floor 37, Mezzanine, Penthouse | Project M00277517 Project M00277453 Project M00277508 |