The second 72,000-sf building, to be delivered at the end of this year, would have been speculative had tenants not scooped up the space so fast. As is, building No. 2 is already two-thirds leased, says Jim Mark, president of Melvin Mark Companies, the Portland-based development, management and brokerage company.

"That made the decision (to break ground) a lot easier," Mark tells GlobeSt.com. Mark isn't revealing the tenants' names until they give him the go-ahead, but it's sparked development that is already permitted and set for a July ground-breaking. Mark says there are proposals out that, if signed, would fill 70% of the next two phases.

Sunset Center will be a campus-style development with a central plaza "that will be good for concerts," says Mark. The project is located at 194th and Evergreen, about one-eighth of a mile from AmberGlen Business Center, a campus mixed with flex and class A office space.