KBS Location Icon 421 SW 6th Ave, Portland, OR 97204

Property Overview

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. 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.

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. The building fronts the Sixth Avenue transit mall providing tenants with convenient access to mass transit.

The property is among the oldest buildings in Portland to be awarded LEED-EB Gold by the U.S. Green Building Council.


The property is available on KBS’ online offering through KBS Direct allows accredited investors to invest in a portfolio of well-located KBS real estate properties without up-front loads or commissions. For more info, please click the button above or go to

421 SW 6th Ave, Portland, OR
KBS Square Footage Icon 219,742 square feet Total Rentable Area
Office Icon Class A Building Class


  • Commonwealth offers After Hours Key Card Access as an amenity. After Hours Key Card Access
  • Commonwealth offers Banking Nearby as an amenity. Banking Nearby
  • Commonwealth offers Bike Storage as an amenity. Bike Storage
  • Commonwealth offers Conference Center as an amenity. Conference Center
  • Commonwealth offers Energy Management System as an amenity. Energy Management System
  • Commonwealth offers Entertainment Nearby as an amenity. Entertainment Nearby
  • Commonwealth offers Event Facilities as an amenity. Event Facilities
  • Commonwealth offers Fitness Classes as an amenity. Fitness Classes
  • Commonwealth offers Freight Elevators as an amenity. Freight Elevators
  • Commonwealth offers Kitchen as an amenity. Kitchen
  • Commonwealth offers Locker Rooms with Showers as an amenity. Locker Rooms with Showers
  • Commonwealth offers Lodging Nearby as an amenity. Lodging Nearby
  • Commonwealth offers On-Site Fitness Center as an amenity. On-Site Fitness Center
  • Commonwealth offers On-Site Management Office as an amenity. On-Site Management Office
  • Commonwealth offers On-Site Storage as an amenity. On-Site Storage
  • Commonwealth offers Outdoor Deck as an amenity. Outdoor Deck
  • Commonwealth offers Park Nearby as an amenity. Park Nearby
  • Commonwealth offers Private Lockers as an amenity. Private Lockers
  • Commonwealth offers Public Transportation Nearby as an amenity. Public Transportation Nearby
  • Commonwealth offers Restaurant / Dining Nearby as an amenity. Restaurant / Dining Nearby
  • Commonwealth offers Rooftop View Terrace as an amenity. Rooftop View Terrace
  • Commonwealth offers Security Guards as an amenity. Security Guards
  • Commonwealth offers Shopping Nearby as an amenity. Shopping Nearby
  • Commonwealth offers Tenant Lounge as an amenity. Tenant Lounge
  • Commonwealth offers Transit Nearby as an amenity. Transit Nearby
  • Commonwealth offers Wi-Fi Service as an amenity. Wi-Fi Service


  • energy-star
  • LEED Gold

*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.