Designed by renowned architect Pietro Belluschi and constructed between 1946 and 1948, Commonwealth is recognized as one of the first glass box, mid-century design towers ever built.
Commonwealth New Property


Rentable Square Feet


Property Type

Since its creative repositioning beginning in 2008, the building has become one of the dominant locations for Portland’s technology, advertising, media and information tenants.
The property is among the oldest buildings in Portland to be awarded LEED-EB Gold by the U.S. Green Building Council. More than $13.6 million was invested in tenant improvements, shared amenities and capital expenditures in recent years, allowing Commonwealth to offer a best-in-class tenant experience. Amenities include a roof top deck, building conference room, tenant lounge, bicycle storage, a fitness center and locker rooms.


Portland, Oregon

no. of buildings




square footage


Logos shown represent awards or honors attributable to KBS properties in the last five years. LEED and Energy Star designations may reflect certifications received prior to the current year. Some properties may reflect multiple buildings where some of the buildings at the property do not possess LEED or Energy Star certifications. Awards shown may represent a specific event and do not constitute an endorsement of KBS by any of the entities shown.


Virtual Tour


Suite 400

Suite 100

Suite 225

Why Tenants Like This Property

The building fronts the Sixth Avenue transit mall providing tenants with convenient access to mass transit.
gym icon
Fitness Center
Nearby Lightrail Icon_Premier Real Estate Investment Management
Transportation Nearby
Nearby stores icon small
Shopping Nearby
nearby entertainments icon
Entertainment Nearby
Restaurants Nearby
Lounges icon small
Tenant Lounge
Accommodation Nearby
Banking Nearby
Bike Storage
Conference Center
Energy Management System
Event Facilities
On-Site Management Office
On-Site Storage
Rooftop View Terrace
Wi-Fi Service


421 SW 6th Ave,

Portland, OR 97204

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