# 521 5th Avenue, Manhattan Commercial · built c. 1929 · Block 1278, Lot 1. On Umarelli: https://umarelli.org/nyc/1012780001/521-5-avenue More construction in Midtown: https://umarelli.org/nyc/manhattan/midtown.md Every lot on block 1278: https://umarelli.org/nyc/manhattan/1278.md ## Building permits - Alteration, filed Aug 18, 2026, estimated cost $33K, described as “Filing includes removal, relocation, and new construction of non-load bearing interior walls and doors as per plan to combine two office spaces. No change in egress or occupancy. SP to be filed separately as LAA, only if required.” - Alteration, filed Jun 5, 2026, estimated cost $15K, described as “Herewith filing for an interior renovation of an office #820 to include: remove and replacement of existing light fixtures, removal and installation of new carpet throughout, construction of 2 closets. Existing structural system shall not…” - Alteration, filed Feb 19, 2026, described as “FISP INSPECTION (Facade Inspection Safety Program). INDUSTRIAL ROPE ACCESS TECHNIQUES AND METHODS. SEE ATTACHED PLANS. Designated Primary Site supervisor: Jesus Decola” - Alteration, filed Sep 30, 2025, estimated cost $375K, described as “Modification/installation of non load bearing partitions as per plan. No change in use, egress or occupancy.” - Alteration, filed Jul 28, 2025, estimated cost $25K, described as “Sprinkler filing as per plans. No change in use, egress or occupancy.” - Alteration, filed Jul 28, 2025, estimated cost $100K, described as “Mechanical filing as per plans. No change in use, egress or occupancy,” - Alteration, filed May 13, 2024, estimated cost $20K, described as “Mechanical filing as per plans. No change in use, egress or occupancy.” - Alteration, filed May 9, 2024, estimated cost $300K, described as “Modification/installation of non load bearing partitions as per plan. No change in use, egress or occupancy.” - Alteration, filed Mar 28, 2024, estimated cost $133K, described as “Mechanical filing as per plans. No change in use, egress or occupancy.” - Alteration, filed Mar 28, 2024, estimated cost $335K, described as “Installation of non load bearing partitions as per plans. No change in use, egress or occupancy.” - Alteration, filed Mar 28, 2024, estimated cost $18K, described as “Plumbing filing as per plans. No change in use, egress or occupancy.” - Alteration, filed Mar 11, 2024, estimated cost $224K, described as “Mechanical filing as per plans. No change in use, egress or occupancy.” - Alteration, filed Sep 27, 2023, estimated cost $1K, described as “Proposed installation of temporary pipe scaffold as per plans. Work shall comply with chapter #33 of 2022 the NYC building code. No change in use, occupancy, or egress under this application.” - Alteration, filed Feb 21, 2023, estimated cost $30K, described as “Removal of non load bearing partitions as per plans. No change in use, egress or occupancy.” - Alteration, filed Jan 31, 2023, estimated cost $61K, described as “Removal of non load bearing partitions as per plans. No change in use, egress or occupancy.” - Alteration, filed Oct 31, 2022, estimated cost $250K, described as “Mechanical filing as per plans. No change in use, egress or occupancy.” - Alteration, filed Sep 30, 2022, estimated cost $700K, described as “Installation of non load bearing partitions as per plans. No change inuse, egress or occupancy.” - Alteration, filed Sep 29, 2022, estimated cost $90K, described as “Plumbing & sprinler filings as per plans. No change in use, egress or occupancy.” - Alteration, filed Aug 9, 2022, estimated cost $100K, described as “Modification to mechanical systems as per plans. No change in use, egress or occupancy.” - Alteration, filed Aug 9, 2022, estimated cost $50K, described as “Modification to plumbing and sprinkler system as per plans. No change in use, egress or occupancy.” - Alteration, filed Aug 8, 2022, estimated cost $300K, described as “Installation of non load bearing partitions as per plans. No change inuse, egress or occupancy.” - Alteration, filed Jun 21, 2022, estimated cost $50K, described as “New roof terrace framing. No change in use, egress or occupancy.” - Alteration, filed Jun 15, 2022, estimated cost $643K, described as “Installation of non load bearing partitions as per plans. No change inuse, egress or occupancy.” - Alteration, filed Jun 14, 2022, estimated cost $643K, described as “Modification to mechanical systems as per plans. No change in use, egress or occupancy.” - Alteration, filed Apr 26, 2022, estimated cost $190K, described as “Plumbing and sprinkler filing as per plans. No change in use, egress or occupancy.” 43 more, older permits are in this building’s full list on the map: https://umarelli.org/nyc/1012780001/521-5-avenue. ## Property taxes - Assessment: $73,000,000 - 2026–27 tax: $7,919,040 - Market value (city estimate): $162,222,200 - Taxable value: $73,000,000 - Assessed land: $11,563,200 - Assessed improvements: $61,436,800 ## Zoning C5-3 (part of the lot is C5-2.5): floor area ratio 22.79 built, above the 15.00 base zoning allows, which bonuses, transfers or older rules can permit. ## Recent sales - May 22, 2019: $379,283,537 Open-market sales since 2016, from the Department of Finance’s sales files. ## Flood zone Current FEMA flood map: zone X, minimal flood hazard. ## Board and land use applications - Change to an earlier grant (Board of Standards and Appeals 294-99-BZIII): Change to an earlier grant, Granted, filed Dec 31, 2019, decided Feb 8, 2021. Extension of Term of a previously approved Special Permit (§73-36) which permitted the operation of a physical cultural establishment (Equinox) which expires on May 9, 2020. C5-2.5 and C5-3 Midtown Special Purpose District – Rockefeller… - Variance or special permit (Board of Standards and Appeals 294-99-BZ): Variance or special permit, Granted, filed Dec 14, 1999, decided May 9, 2000. Special Permit (§73-36) to permit within a C5-3(MID) 2.5 (MID) zoning district, the proposed physical culture establishment, located within a portion of an existing commercial building as per Z.R. §32-10. - Greater East Midtown - Special Subdistrict (City Planning P2016M0316): Completed, decided Aug 15, 2017. This is an application by NYC Department of City Planning requesting a text amendment to establish the East Midtown Subdistrict and extend the Special Midtown District, and to rezone a half-block area from C5-2 to C5-3 to reinforce the… From New York City and Jersey City public records, refreshed within a day of each release. Sources: https://umarelli.org/sources. Methodology and corrections: https://umarelli.org/methodology