Consider the skyline. 425 Park Avenue stands as a testament to modern architectural ingenuity. Its story is one of ambitious redevelopment and innovative design.
The original 388-foot building was a modernist structure. Kahn & Jacobs designed it. It replaced sixteen four-story townhouses in 1957.
L&L Holding sought to redevelop 425 Park Avenue. They secured an 84-year ground lease in 2006. This allowed them to rebuild after the existing leases expired in 2015.
Foster + Partners won a competition to design the new building. Their design retained 25% of the original structure. This allowed for a total floor area of 670,000 square feet.
The redevelopment faced challenges. Demolition and construction required a third engineering firm. Temporary steel structures supported the remaining floors during demolition.
425 Park Avenue is located in Midtown Manhattan. This area has many office buildings. The 1961 Zoning Resolution made redevelopment difficult. It restricted building sizes based on floor area ratio.
Without redevelopment, 425 Park Avenue could only generate $50 to $70 per square foot. A modern building could generate over $100 per square foot. The new design retained enough of the original structure to maximize floor space.
The building topped out on December 4 2018. Lead architect Lord Norman Foster attended the ceremony. The renovation was completed in October 2022. The cost was $1 billion.
The 47-story tower has three distinct volumes. There is a seven-story base. There is a recessed central section. There is a slender formation of premium floors at the top.
The design maximizes Park Avenue frontage. The core is placed at the rear. Glazed elevator lobbies bring life to the eastern elevation. They reveal views toward the East River.
Three shear walls extend from the top. They provide a marker on the skyline. The structural expression allows for flexible column-free floorplates.
Double-height spaces intersect the office floors. These create open space. The second setback features The Diagrid Club. All tenants can access it. This club offers views, outdoor areas and an art installation by Yayoi Kusama.
The lobby is triple-height. Jean-Georges Vongerichten’s restaurant flanks it. The restaurant includes a mezzanine dining level and a cocktail lounge. It also features a 24-foot painting by Larry Poons.
Originally, Daniel Humm was to open two restaurants in the building. However, plans changed. Jean-Georges Vongerichten opened Four Twenty Five in December 2023.
Citadel leased 200000 square feet in early 2016. This included the penthouse floor. It was the most expensive lease in the city’s history at the time. Citadel later expanded their lease to occupy 48% of the building.
425 Park Avenue stands as a symbol of innovation. Its blend of history and modern design make it a unique landmark. The building achieved LEED Gold standard and Well Core certification. It enhances the health and wellbeing of its occupants.