Denis ONeill

Denis ONeill

Senior Vice President

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Professional Summary

Denis specializes in advising investors seeking 1031 exchanges. He has worked in all facets of commercial real estate with buyers and sellers who appreciate attention to detail and expertise in property and market analysis.

Denis’s focus is to apply his market knowledge and relationships in the commercial real estate community to identify investments that fully meet each client’s financial goals and risk profile.

Applying years of experience in investment sales, he has listed and sold shopping centers, office buildings, and industrial properties throughout the Northwest.

Business Background

Denis started in commercial real estate as an appraiser in Melbourne, Australia.

Prior to joining Colliers International, Denis was an investment broker at NAI Norris Beggs and Simpson. During his tenure at NBS he was a Regional Manager of its San Jose office. Returning to Portland, Denis was Vice President of Development for Cornerstone Columbia, a joint venture of Weyerhaeuser and Portland General, developers of Portland’s River Place mixed-use project.


Prior to joining Colliers International, Denis was a broker at NAI Norris, Beggs & Simpson. During his tenure at NBS he was a regional manager of the San Jose office.

Community involvement:

  • Santa Clara Commercial Association of Realtors, Board of Directors 1987-1989
  • Silicon Valley Development Tour - Chairman, 1988-1989


Stanford University

Royal Melbourne Institute of Technology,

Memberships & Involvements

Commercial Association of Brokers of Oregon and SW Washington


Investment Properties
Service Lines
Capital Markets, Landlord Representation
Property Types
Industrial, Land


Featured Research

Featured Research
Jan 14, 2020
2019 Q4 Portland Metro Flex Report
Rents increased 5.7 percent from Q4 2018 to Q4 2019 across the Portland market, more here.
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Jan 14, 2020
2019 Q4 Portland Metro Industrial Report
Industrial vacancy across the Portland market decreases 30 basis-points between Q3 and Q4 2019.
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Oct 7, 2019
2019 Q3 Portland Metro Industrial Report
Despite strong market fundamentals, complications resulting from trade uncertainty and the perception of being late in the economic cycle are tempering lease activity in Portland’s industrial market. While one of the biggest threats to the region’s industrial health is a lack of available land, there is significant new supply under construction or proposed. The newly constructed availability pushes rental rates up while temporarily spiking vacancy. Clark County submarkets saw the biggest vacancy increase this quarter, jumping from 2 percent to 3.6 percent while the Westside and Northeast submarkets only increased 0.5 percent and 0.3 percent, respectively.
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