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423 metres tall, 270 Park Avenue is an office skyscraper in New York City, United States. It ranks number 33 among the world's tallest completed buildings by architectural height. [2]
| Architectural height | 423 m1,388 ft |
| Height to tip | Not confirmed |
| Highest occupied floor | Not confirmed |
| Observation deck | Not confirmed |
| Floors above ground | 60 |
| Floors below ground | Not confirmed |
| Completed | 2025 |
Directory record added 9 September 2026. The original top-ten engineering dossiers have a deeper independent review; this record does not claim that same verification level. See source ↗
Project evidence, construction records and the limits of what is documented. A named consultant’s role is kept separate from the architect, contractor and local engineer of record.
The engineer describes a transfer structure called the Tabletop above the lower supports. The tower must deliver large loads through a site occupied by active tracks, so the foundation locations and the superstructure cannot be designed independently.
A braced core, five levels of outrigger trusses and diamond-shaped facade macro-braces work together. Post-tensioned anchors engage the bedrock through the caisson caps.
A mass damper limits wind accelerations. Train-induced excitation required separate modelling calibrated against the former building’s measured response. Controlling wind sway does not automatically solve vibration arriving through the foundations.
Technical source checked : Severud Associates: 270 Park Avenue ↗. This check covers the notes above, not every measurement in the directory.
| Topic | Recorded information | How to interpret it |
|---|---|---|
| Structural system | Braced core, outriggers and perimeter macro-braces [source] | The frame description needs to distinguish gravity support from wind and earthquake resistance. Read the engineering guide ↗ |
| Main structural material | Not confirmed | A material label does not establish steel grade, concrete strength, fire protection or connection details. Read the engineering guide ↗ |
| Basement levels | Not confirmed | Basement count does not establish pile depth, founding stratum, bearing pressure or the excavation sequence. Read the engineering guide ↗ |
| Elevator count | Not confirmed | Car count does not establish passenger capacity, speed, zoning, redundancy or peak traffic performance. Read the engineering guide ↗ |
| Construction start | Not confirmed | A start year can refer to enabling works, foundations or the main construction contract. Read the engineering guide ↗ |
| Structural topping out | Not confirmed | Topping out marks a structural milestone; facade work, commissioning and occupancy can follow later. Read the engineering guide ↗ |
The directory records 423 metres of architectural height and 60 above-ground floors. The highest occupied level has not been confirmed here. Measurement source ↗
Dividing architectural height by floor count would include the crown and any unequal floor heights. It cannot be used as a typical floor-to-floor dimension, a measure of slenderness or a structural design input.
Foundation tests, core and column sizes, construction-stage stability, creep and shortening allowances, wind-tunnel results and facade movement tolerances need project-specific evidence. Their absence here does not imply that the project lacked those studies.
Height bars use the same scale. They do not represent building shape. Measurement source ↗
Record updated 2026-09-09. Sources can differ on height categories, floor counts and completion milestones. Read our methodology.
Directory record updated . No dated field checks have been recorded. Updating the page does not re-verify every fact.
| Checked | Field | Evidence and decision |
|---|
These notes predate this visible log. Their original change dates are not reconstructed.
Earlier record edits may not have a complete audit trail. Read the methodology and correction policy ↗
270 Park Avenue reaches 423 metres (1,388 feet) by architectural height.
It was completed in 2025.
270 Park Avenue stands in New York City, United States.
It has 60 above-ground floors.