Energy Capital Partners Expands to Full Floor at One World Trade Center

• Energy Capital Partners expands to 70,425 square feet
• Tenant now occupies the entire 59th floor after fourth expansion
• Building remains 97% leased, signaling strong demand

What the expansion means for One World Trade Center

Energy Capital Partners has expanded its presence at One World Trade Center, now taking over the full 59th floor. With existing space below, the firm now controls more than 70,000 square feet in the building. This marks the company’s fourth expansion since first leasing space in 2017. For landlords, repeat growth from an existing tenant shows strong building performance and tenant retention.

Why tenants are staying and growing

The tenant cited location, amenities, and commute as key reasons for expanding in place. Instead of relocating, the firm chose to grow within the same asset. This reflects a broader trend where companies are consolidating into high-quality office buildings that offer better experience and efficiency.

How the asset continues to perform

The Durst Organization developed the tower with the Port Authority as part of a public-private partnership. At 3.1 million square feet and 97 percent leased, the building continues to stand out as one of the top-performing office assets in Manhattan.

What this means for Manhattan office demand

Manhattan remains one of the strongest office markets in the country, with vacancy rates below national averages. Demand is concentrated in premium buildings with strong amenities and transit access. Tenants are prioritizing quality, which is driving a divide between top-tier assets and older buildings.

What this means for investors and landlords

This deal shows that office demand remains solid for the right product. Companies are not leaving the market; they are upgrading and expanding into better buildings. For investors, prime office assets continue to offer stability. For landlords, retaining tenants and capturing expansion demand is key to long-term performance. This expansion highlights that top-tier office buildings are still attracting growth and capital in major markets.