U.S. Office Rebound to Be Delayed by ‘Shadow’ Space, Rosen Says

The U.S. office sector will be the slowest to recover as companies absorb empty space and advances in technology reduce the need for square footage, said Kenneth Rosen, a professor at the University of California, Berkeley.

Unoccupied “shadow inventory” accounts for 3 percent to 5 percent of total business leases, and that space will be filled before firms sign new rental agreements, Rosen, chairman of Berkeley’s Fisher Center for Real Estate and Urban Economics, said at a conference in San Francisco. Cloud computing and other tech advances let employees work away from offices, further reducing space needs, he said.