About Timberline Land and Farm
Timberline Land & Farm is more than a real estate company—we are dedicated to building lasting relationships with our clients. Our commitment goes beyond simply helping you buy or sell property; we strive to be your trusted partner in every aspect of your land venture.
From the first conversation to long after your transaction is complete, we pledge to stand by you, offering guidance, expertise, and unwavering support. Our goal is not just to find you the perfect property but to become a valued part of your team for all future acquisitions.
At Timberline, we believe success is a shared journey. We look forward to partnering with you and ensuring you achieve your land ownership dreams.

- What our clients are saying -
“We dealt with Mark Costello. He is the best real estate agent we’ve ever dealt with. Hard worker!! He spent countless hours showing us property before we made a decision on what we wanted. He helped us & kept us informed throughout the whole process. Professional, honest, hardworking, responsive & reliable! Highly recommend!”
Anna.
"Working with Mark Costello has been a game-changer for us. Not only does he bring exceptional expertise in real estate, but his knowledge of land assessment, valuation, and management is unparalleled. Whether it's farmland, timberland, or hunting properties, he has a keen eye for every detail, from soil quality to the potential for wildlife management. He walked us through the entire process, providing guidance before, during, and even after the sale. We felt like more than just clients - Mark became a trusted consultant, helping us make the best decisions for our property needs. His dedication to building lasting relationships means we know we can count on him as both a business partner and a friend. If you're looking for an agent who truly understands land - with or without homes or structures and how to manage it, look no further."
Todd and Kate Melioris.
“Mark is great to work with. He has sold 9 properties for me and has gone the extra mile to get them presented in a way that will attract buyers and maximize value. Mark is friendly, diligent, knowledgeable, honest, and stays in touch with his clients regularly throughout the sale process. I highly recommend him for land and farm acquisitions and sales.”
Jon P.