Determined to expand to more neighborhoods, the “flex-working” company, Knotel, keeps signing leases. The newest is a 19,563-square-foot deal at 250 Hudson St. in Hudson Square.

The 15-story building owned by Jack Resnick & Sons had an asking rent in the $80-per-foot range.

The space on the majority of the third floor will be targeted to Knotel’s flex-work customers for whom they design custom spaces for 50 employees or more. Knotel does not provide co-working desks to individuals.

Michael Morris and Greg DiGioia of Newmark Knight Frank represented Knotel in the transaction, while Brett Greenberg and Adam Rappaport of Jack Resnick & Sons represented the owner in-house.

Knotel CEO and co-founder Amol Sarva has expanded to Germany with Ahoy!Berlin and acquired the lease space search engine, 42Floors, with which it is developing a blockchain company, Baya, to track real estate transactions.

In the last several months Knotel has leased space at 30 Broad, 110 William St., 17 W. 20th St., 54 W. 21st St., 30 W. 26th St. and 530 Seventh Ave. and signed a management agreement with the Sapir Organization for 45,000 feet at 261 Madison Ave.

Much of the development has been fueled by the energy of employees working alongside other small companies in collaborative environments.

But the new accounting rules, which require owned and over-12-month-leased spaces to go on balance sheets next year, are now serving as a stick to thrust larger companies with multiple offices to sign short, customized deals that can remain off the financials.