Seattle Office Vacancy Remained High in August 2026

The city's office market recorded a 24.7 percent vacancy rate amid slowing investment activity.

Updated on Oct. 12, 2026 in Commercial

Seattle Office Vacancy Remained High in August 2026

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As of August 2026, the Seattle office vacancy rate hit 24.7 percent, significantly outpacing the national average of 17.8 percent. Investment activity remained constrained with total year-to-date sales reaching $426.1 million.

Why it matters

The high vacancy levels underscore a persistent shift in commercial real estate demand that has prompted local officials to explore adaptive reuse strategies. These efforts aim to repurpose underused office footprints into residential housing to revitalize urban centers.

Office properties sold for an average of $306.32 per square foot, while new speculative construction represented less than 0.1 percent of total inventory. Coworking space occupies 3.5 million square feet across 181 regional locations.

The players

Amazon

A multinational technology company that is a major developer and tenant in the Seattle and Bellevue commercial real estate markets.

Blackstone

An alternative asset management firm that maintains a significant portfolio of commercial office properties.

Anthropic

An artificial intelligence research company that holds a significant office lease at Dexter Yard.

Regus

A global provider of flexible workspace solutions and coworking environments.

The details

To address the glut of unused space, Seattle implemented a tax deferral program in February 2026 for developers converting commercial buildings into multifamily units. Participating projects are required to designate at least 10 percent of their housing units for households earning 80 percent or less of the area median income.

2019: Blackstone purchased the U.S. Bank Center.
2021: Amazon Tower 1 broke ground in Bellevue.
September 2024: Amazon Tower 1 topped out.
February 2026: Conversion tax incentive rules took effect.
August 2026: Reporting period for market vacancy and investment data.

Culture Shift

This trend reflects a broader move toward adaptive urban planning as city centers grapple with the long-term impacts of hybrid work models. The initiative signals a pivot from traditional commercial development toward residential-led urban density.

The push for residential conversions could lead to an increase in available apartment stock in downtown corridors. Residents may see underutilized commercial buildings transition into housing units, potentially altering the density and demographic makeup of the city center.

The takeaway

The high volume of vacant office space suggests that developers and city planners will remain focused on incentivizing conversion projects to stabilize the market. Readers can monitor how these tax policies influence future downtown residential availability and property values.