Mark Helps You
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Making your real estate dreams a reality.

As a licensed broker with over 30 years of experience in small business ownership and management, I have a proven track record of success and a deep understanding of the local market. I am also a proud member of the Corvallis community, where I have lived, worked, and raised my family.

I am passionate about helping my clients achieve their real estate goals, and I am committed to providing them with the highest level of service and support. I understand that buying or selling a home can be a major life event, and I am here to guide you through every step of the process with expertise and compassion.

Whether you are a first-time homebuyer, a seasoned investor, or looking to downsize or upsize, I am here to help you find the perfect home or sell your existing property for top dollar. I will work tirelessly to negotiate the best possible price and terms on your behalf, and I will be there with you every step of the way, from contract to closing.

I am confident that I have the skills and experience necessary to help you achieve your real estate goals. Contact me today to learn more about how I can help you make your dream home a reality. Dream big!

Mark O'Brien, Broker, REALTOR®
MarkO'Brien
Broker, REALTOR®
Client
Thoughts

- B.B. , Seller

I was pleased with the open and honest communication from Mark. Would definitely work with him again in the future.

- B.G. & M.N. , Buyer

Mark was very helpful, always available and ready to answer questions.

- R.G. , Buyer

Mark is great to work with. This contingency buy would not of closed without him. He encouraged me to be patient. After months reviewing his search results, the right property at the right price showed up. Mark knows the real estate process, the local market and community.

- S.W. , Buyer

In the world of homebuying, there are many twists and turns, many mountains and valleys that you do not see. If you're ever in need of a guided tour from a man who is very knowledgeable, patient, understanding, and invested in your family to find a home, well, let me tell you Mark O'Brien is your m... VIEW MORE TESTIMONIALS

- Brian

You are the first real estate agent I have worked with from start to finish. You were diligent, professional and always willing to go the extra mile. I will definitely use you on my next real estate transaction. Thank you!

- A.C. & A.H. , Buyer

Working with Mark was great. He helped alleviate communication issues we had with our lender. The houses he showed and recommended to us were on point.

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Disclaimer: All information deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. Neither listing broker(s) or information provider(s) shall be responsible for any typographical errors, misinformation, misprints and shall be held totally harmless. Listing(s) information is provided for consumers personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information on this site was last updated 03/04/2026. The listing information on this page last changed on 03/04/2026. The data relating to real estate for sale on this website comes in part from the Internet Data Exchange program of Delta Media Group MLS (last updated Wed 03/04/2026 8:43:20 PM EST) or Willamette Valley MLS (last updated Wed 03/04/2026 8:41:08 PM EST). Real estate listings held by brokerage firms other than Coldwell Banker Valley Brokers may be marked with the Internet Data Exchange logo and detailed information about those properties will include the name of the listing broker(s) when required by the MLS. All rights reserved.
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Based on information from Willamette Valley Multiple Listing Service, which neither guarantees nor is in any way responsible for its accuracy. All data is provided ‘AS IS’ and with all faults. Data maintained by Willamette Valley Multiple Listing Service may not reflect all real estate activity in the market.

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