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541.3 metres tall, One World Trade Center is an office skyscraper in New York City, United States. It ranks number 7 among the world's tallest completed buildings by architectural height. [2]
| Architectural height | 541.3 m1,776 ft |
| Height to tip | 546.2 m1,792 ft |
| Highest occupied floor | 386.5 m1,268 ft |
| Observation deck | Not confirmed |
| Floors above ground | 94 |
| Floors below ground | 5 |
| Completed | 2014 |
The spire is part of its architectural height. The building is distinct from the former World Trade Center towers. See source ↗
Design, structure and construction.
Technical sources reviewed 9 September 2026.
A high-strength concrete core paired with a ductile steel perimeter.
The reinforced-concrete core works with a ductile perimeter steel moment frame to resist gravity, wind and seismic effects. Floor beams span from the core to the exterior, keeping office areas comparatively open. This hybrid differs fundamentally from the perimeter-tube arrangement of the original towers.
Read the technical source ↗WSP reports core concrete reaching 14,000 psi, approximately 97 MPa. Greater strength helped control wall thickness, structural weight and rentable-area loss. Its concrete mix replaced more than half the cement content with industrial by-products. The project also used substantial recycled steel.
Read the technical source ↗Tishman coordinated the reinforced-concrete core and steel frame. ArcelorMittal supplied 12,500 tonnes of structural steel, primarily large Grade 65 sections. The resulting construction combines cast-in-place walls with fabricated beam-and-column assemblies, rather than relying on a single structural material throughout.
Read the technical source ↗The core encloses access stairs and a dedicated stair for first responders. Enhanced fireproofing, redundant water supplies and protected circulation were integrated into the structure and floor planning. These are specific design features of this building, not a claim that any tower is immune to fire or impact.
Read the technical source ↗Design architects, engineers and construction firms have different responsibilities. Credits identify the published role on this project.
Explore architects & builders ↗Height bars use the same scale. They do not represent building shape. Measurement source ↗
Record updated 2026-09-24. Sources can differ on height categories, floor counts and completion milestones. Read our methodology.
Directory record updated . Most recent recorded field check: . Updating the page does not re-verify every fact.
| Checked | Field | Evidence and decision |
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| height architectural m | Compared completed status, architectural category and completion milestone. | |
| status | Compared completed status, architectural category and completion milestone. | |
| completed | Compared completed status, architectural category and completion milestone. |
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One World Trade Center reaches 541.3 metres (1,776 feet) by architectural height, with a tip height of 546.2 metres.
It was completed in 2014.
One World Trade Center stands in New York City, United States.
It has 94 above-ground floors and 5 below ground.