The New Zealand Permanent Mission to the United Nations has renewed its 11-year lease at L&L Holding Company’s 600 Third Ave, extending a diplomatic tenancy that has occupied the building’s entire 14th floor for roughly 20 years, according to Commercial Observer. The deal pushes New Zealand’s commitment at the property through at least 2036.

The mission occupies 11,865 square feet at the 42-story Midtown East office tower. Financial terms of the deal were not disclosed.

Kent Swig, James Emden, and Peter Shakalis of Helmsley Spear represented the tenant, while L&L was represented in-house by Jonathan Tootell, Tanya Grimaldo and Giannina Brancato.

“We are pleased to extend our partnerships with Aaronson Rappaport and Bond Schoeneck & King, two highly valued tenants of the office tower,” said Jonathan Tootell, L&L executive vice president. “600 Third Avenue’s exceptional workspaces and superior accessibility have made it a sought-after destination for organizations aiming to attract, inspire and retain top-tier talent.”

Located between East 39th and 40th streets, the building sits about six blocks from United Nations’ headquarters and four blocks from Grand Central Terminal, a key consideration for diplomatic operations.

“This lease renewal is a great testament to 600 Third Avenue ownership and the confidence shown in New York City as it continues a vibrant path forward in 2026,” said James Emden of Helmsley Spear.

Built in 1970, the 590-foot tower has undergone a series of capital improvements in recent years, including a renovated lobby; modernized elevators; and upgrades to core restrooms and corridors on 11 floors, including the 14th. L&L Holding Company and its partner BlackRock also redesigned a 6,500-square-foot public plaza in 2016. The property is Energy Star-certified and features 24/7 security, a visitor registration system and on-site management.

The renewal follows steady leasing activity at the property throughout the last two years. In 2023, law firm Polsinelli renewed and expanded to 52,516 square feet across three floors in a 10-year deal running through 2036. Then, in February of last year, Aaronson Rappaport Feinstein & Deutsch signed a 15-year renewal for 42,764 square feet spanning the fifth and sixth floors, while Bond, Schoeneck & King renewed the entire 22nd floor for seven years.

As of early last year, the building was approximately 91% leased. Meanwhile, retail hit 100% occupancy in August 2025 when Dunkin’ signed for the final retail space, joining Shake Shack, Chipotle Mexican Grill, Just Salad and Blink Fitness.