Seattle Offices Leased by Google Go Up for Sale

A Seattle office building leased by Google is up for sale.

Vulcan Real Estate listed the 335,000-square-foot property at 520 Westlake Avenue North in the South Lake Union neighborhood for sale, the Puget Sound Business Journal reported. The asking price was not disclosed. Newmark’s Kevin Shannon is marketing the property.

The building has an assessed value of nearly $140 million, according to King County records.

Seattle-based Vulcan completed the building in 2021 on a 1-acre site formerly home to a Guitar Center. In addition to the offices, the structure includes 27,500 square feet of ground-floor retail space, which was filled by Walgreens in 2024. The building abuts the Wainwright Building at 535 Terry Avenue North, also developed by Vulcan and purchased by tenant Amazon in 2012.

The 520 Westlake building is Vulcan’s latest to hit the market as the developer seeks buyers for other large office properties in the Puget Sound region. Earlier this year, the firm listed Tower 1 at the West Main office complex in Bellevue for an undisclosed price; that building’s assessed value is nearly $140.1 million. Amazon leases the building as its focus shifts from Seattle to Bellevue. Vulcan is in talks to sell Tower 1 to Los Angeles-based Preylock Real Estate Holdings, the outlet said.

Office fundamentals in Seattle help to explain why more companies like OpenAI are more interested in Bellevue for their Puget Sound operations.

Office vacancy in the first quarter was 30.6 percent — an increase year over year and a figure higher than in other markets that have been navigating rough waters in recent years like San Francisco and Los Angeles, both of which now have vacancy rates below Seattle’s, per Colliers. Office absorption in Seattle was down year over year in the first quarter, though it was still negative with a 412,000-square-foot gap between space vacated and leased.

— Chris Malone Méndez