In recent years, new office designs have encouraged employees to get moving. Cafes and lounges beckon workers when they need a break. Open staircases spur them to climb floors rather than take the elevator. Sit-stand desks offer them a chance to stretch while continuing to work.

Now, the offices themselves are on the move.

M Moser Associates, a design firm in New York, calls its office “a living lab.” Green walls of plants are set on casters and can be used to block off one end of the 6,000-square-foot open space for private meetings, or they can be pushed against other walls to make room for large gatherings. And custom birch-topped work tables have wheels on back legs so they can be tipped and easily rolled elsewhere.

M Moser continually tinkers with its office, seeking new ways to support its staff and offer a “proof of concept” to visiting clients, said Grant Christofely , a senior strategist and associate at M Moser, who led a recent tour of the firm’s office in the historic Woolworth Building in Lower Manhattan.

The desire to be able to switch things up at a moment’s notice has spread to companies in other fields, too. “Businesses are changing at a rate architects almost can’t keep up with,” Mr. Christofely said.