Selig lands top-floor tenant for 400 Westlake in South Lake Union

Martin Selig Real Estate new 400 Westlake tower in South Lake Union now has a top-floor tenant: First Choice Health.

The provider-owned insurance organization is moving from its current headquarters in One Union Square at 600 University St. It will take just over 10,300 square feet on the 15th floor, representatives confirmed last week. The floor has a total of 14,927 rentable square feet, marketing materials show

Selig bills the 15-story, 230,000-square-foot tower as the greenest of any of its size in the country. The structure is expected to generate 105% of the energy it needs, use 35% less energy than the average office building and save 100% of the rainwater it receives and treat it for non-potable uses.