Grassi signs 41,000 s/f lease renewal at 50 Jericho Quadrangle

Jericho, NY Cushman & Wakefield arranged a 41,000 s/f office lease renewal on Long Island, marking the largest office recommitment signed in the market thus far in 2026. Grassi, a leading advisory, tax and accounting services firm, renewed its lease for the entire second floor of 50 Jericho Quadrangle.

A Cushman & Wakefield team of Rob Kuppersmith and Jennifer Grgas, along with Newmark’s Scott Berfas and Dan Oliver, represented Grassi in the transaction. The landlord, The We’re Group, was represented in-house.

“This transaction represents the largest office deal on Long Island so far in 2026, highlighting sustained demand for high-quality office space in Long Island’s competitive market,” said Kuppersmith, executive managing director at Cushman & Wakefield. 

“Grassi’s decision to remain at 50 Jericho Quadrangle reflects a strong commitment to an in-office environment that supports collaboration and productivity, which is reflective of many other Long Island employers that are bringing employees back to the office four to five days a week. Following an extensive evaluation of alternative options, the firm chose to reinvest and rebuild its space to better accommodate their current and future needs.”

50 Jericho Quadrangle is a multi-story office property that features a variety of amenities designed to enhance tenant experience, including updated common areas, on-site management and maintenance, and ample parking.

Jericho Quadrangle benefits from access to major roadways including the Long Island Expwy. and Northern State Pkwy., providing efficient commutes for employees traveling from throughout Long Island and the greater New York metropolitan area. The property is situated near a variety of dining options, retail centers, and business services, offering tenants a range of amenities nearby.