Two office towers in the Bravern building, which are leased to Microsoft, have been sold to Iowa-based Principal Real Estate Investors for $410 million.

Schnitzer West LLC, owner of the towers, closed the sale on Sept. 30 as a conclusion to a 10-year investment in the office towers, Senior Investment Director Tom Woodworth said.

Included in the sale is a seven-level parking garage.

Paula Chizek, spokeswoman for Principal Real Estate, said the company has owned properties in the area for more than 25 years. She said the building was appealing to the company both because of the growing nature of the Bellevue market and the clients already in the building.

“The current lease agreement made it a very attractive investment,” she said.

Woodworth said Schnitzer will stay on as owners of the 300,000 square feet of retail shops and 455 residential units. Additionally, Schnitzer will work as property managers for the office space.

“It concludes a 10-year investment for us,” Woodworth said Friday. “It was for us a successful conclusion to the office portion.”