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Explore Our Properties

A Client-First Approach

Real Estate Guidance Built on Experience, Strategy, and Trust

Mark and Kelli Osterman bring a combined background rooted in years of hands-on real estate experience, strong negotiation training, and deep knowledge of both new construction and resale markets. As trusted advisors, they are committed to helping clients navigate every step of the buying or selling process with clarity, confidence, and precision.

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Dedicated to Your Success

Meet Mark Osterman

Mark didn't stumble into real estate; he built his way into it. He began his career in the mortgage industry, giving him a ground-level understanding of how real estate transactions are financed and what actually makes a deal work from the financial side. From there, he moved to the builder side, spending years working directly with one of Oklahoma's top home builders, where he learned what goes into building a home: the decisions made before a buyer ever walks through the door, the construction behind the walls, and the details that determine long-term value. This foundation alone sets him apart from most agents, who only ever see a transaction from one side.
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Dedicated to Your Success

Meet Kelli Osterman

Kelli didn't enter real estate just to sell homes. She came into it by first understanding them from the inside out. With a Bachelor of Interior Design from the University of Central Oklahoma in Edmond, Oklahoma, she learned how people actually experience a space and how layout, flow, and function shape daily life. She began her career working for one of the top builders in the OKC metro, then got her real estate license and went on to work with other new construction builders throughout her career. That experience gave her a working understanding of what actually goes into building a home and the mechanics behind the walls and the details most buyers never think to ask about. She's been on every side of the deal and one thing has never changed: she doesn't just see what a home is, she sees what it could be for the person living in it.

Our Impact

By the Numbers

20

YEARS OF EXPERIENCE

$442K

AVERAGE PRICE

5★

REVIEWS ON ZILLOW

Collection of Homes

Browse Our Portfolio

  • 9600 Silver Lake Drive For Sale

    $559,000

    9600 Silver Lake Drive, Oklahoma City, OK 73162

    Courtesy of The Agency

    • 5 Beds
    • 4 Baths
    • 3,060 Sq.Ft.
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Trusted by Clients

Success Stories

"Kelli was an excellent realtor. The thing that stood out is her ability to walk me through the home-buying experience. She has many business friends with different specialties that she referred me to. Other things that stood out were the ability to quickly assess negative things in a home, family-oriented, and always professional. This is my first house. My daughter and I are very happy with it."
"Kelli was an excellent realtor. The thing that stood out is her ability to walk me through the home-buying experience. She has many business friends with different specialties that she referred me to. Other things that stood out were the ability to quickly assess negative things in a home, family-oriented, and always professional. This is my first house. My daughter and I are very happy with it."
Christopher H.
"Kelli was such a pleasure to work with. We really loved how she walked us through every step of the process of buying a home and educated us along the way. We know that she has other clients, but throughout our process, we always felt like her number one priority. We valued her professionalism and personal approach to helping us get our dream home. Not only did Kelli go above and beyond for us, but we trust that she has our best interests at heart."
"Kelli was such a pleasure to work with. We really loved how she walked us through every step of the process of buying a home and educated us along the way. We know that she has other clients, but throughout our process, we always felt like her number one priority. We valued her professionalism and personal approach to helping us get our dream home. Not only did Kelli go above and beyond for us, but we trust that she has our best interests at heart."
Kaylie T.
"Kelli sold our house a few months ago. I was immediately impressed by her organization and attention to detail. At our initial meeting, she brought lots of information and data that helped us with decisions on pricing and when and how to market our house. She was in constant communication with us throughout the selling process and was always available to answer our questions. I highly recommend her, and will definitely contact her again if I plan to buy or sell a home."
"Kelli sold our house a few months ago. I was immediately impressed by her organization and attention to detail. At our initial meeting, she brought lots of information and data that helped us with decisions on pricing and when and how to market our house. She was in constant communication with us throughout the selling process and was always available to answer our questions. I highly recommend her, and will definitely contact her again if I plan to buy or sell a home."
Hugh E.

Discover the Area

Explore Communities

  • Oklahoma City
  • Edmond
  • Arcadia
  • Deer Creek
  • Jones
  • Nichols Hills
  • Yukon
  • Mustang
  • Guthrie
  • Norman
  • Moore

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