About us

Jim Sullivan


Jim Sullivan, owner of Jim Sullivan Realty, was one of the original founders of Country Roads Real Estate in Stockton, Il. Jim was the top salesman in the Freeport / Galena MLS for the past seven years. His sales averaged 20 million a year. Jim has lived in JoDaviess County all of his life, and he takes great pride in the friendly people and beautiful landscape the area has to offer.


Jim is no stranger to sales. Before selling real estate, he spent 23 years as a sales representative for Northern Illinois Harvestore where he served on the President’s Council for several years. Jim knows the people and properties of JoDaviess county and the surrounding area better than anyone, and he is eager to help you discover all the beauty and charm of Northern Illinois and Southwestern Wisconsin.


Broker / Owner
Office: 815-947-9040
Cellphone: 815-266-8302
Home: 815-947-2273
Fax: 815-947-2193
E-mail: jim@jimsullivan-realty.com

Cal Bergsma


Cal is not your average realtor. Do not expect to find him in the office sitting behind a desk or in an open house selling homes. Cal has a deep passion for the outdoors and all God’s creatures that call these places home. With either camera or bow in hand he spends his days scouting, hunting and taking pictures of the best hunting and farmland properties the area has to offer. At all times Cal knows what’s available, what’s good, what’s bad and what you should pay.


If you are looking to buy your dream hunting property, you could not possibly find a better realtor to show you what this area has to offer!


Office: 815-947-9040
Cellphone: 815-990-6202
Fax: 815-947-2193
E-mail: cal.bergsma@yahoo.com
E-mail: landfinder.cal@gmail.com

Stephen Henry Clay


Henry is a lifelong resident of Jo Daviess County and enjoys both the community and the magnificent scenery. He is an avid sports enthusiast and enjoys hunting and fishing. He is very familiar with the Jo Daviess County area and the surrounding counties. Previously, he worked for the United States Postal Service for 27 years, serving as Postmaster in the Winslow, Sterling, Stockton, and Crystal Lake, IL communities. Henry began his real estate career in 1985 and joined the Jim Sullivan Realty team in 2009 after his retirement from the Postal Service.


Henry and his wife Karen raised their three children in the Stockton community and today enjoy family gatherings with their kids and grandchildren. Henry lists and sells all aspects of real estate throughout the Stockton, Apple Canyon Lake, Galena and surrounding counties including residential, commercial, farms, and land. Henry looks forward to and is available to assist you with all of your real estate needs.


Office: 815-947-9040
Cellphone: 815-291-7915
Fax: 815-880-8195
E-mail: hclay1@gmail.com

Dave Brummond


Dave Brummond honed his negotiating skills as a purchasing agent with The Parker Pen Company and Trek Bicycle. In that capacity he routinely saved his employer thousands of dollars in their transactions. His sales and negotiation skills have consistently positioned him in the top 50 agents in the South Central Wisconsin MLS.


Dave is a lifetime resident of Janesville Wisconsin where he and Pat, his bride since 1976 raised their children. As a Realtor he is very active all across Southern Wisconsin and soon will be expanding into Northern Illinois. Whether you are a first time buyer or old pro to real estate, Dave will help you find or market your property successfully.


Office: 815-947-9040
Cellphone: 608-921-1088
E-mail: dave.brummond@yahoo.com

Mike Mahoney


Honesty, Integrity, Dedication & Hard working best describe Mike. Throw in down home common sense & you have an agent that will go above & beyond to help both buyers & sellers. A lifelong farmer in the area with a Commodity Brokers & Branch Office Managers license, Mike really knows the people & area of Northern Illinois & Southern Wisconsin. Selling real estate for the past 16 years Mike has been a perennial top seller in the Freeport/Galena Area realtors association. He is licensed in Illinois & Wisconsin. As part owner of Jim Sullivan Realty Mike is Ready to serve all your real estate needs!


Office: 815-947-9040
Office Fax: 815-880-7818
Cellphone: 815-266-1129
E-mail: mmahoney591@gmail.com

Katie McPeek


Born and raised in Stockton, IL Katie returned home after attending Loras College and St. Ambrose University. Katie is married and has 4 rambunctious kids. She is very focused on community and keeping the small towns of Northwest Illinois great places to live. She became a licensed agent in 2006. Enjoying the pride of first time buyers, assisting clients in upsizing or downsizing their homes as their lives change and recognizing the charm and uniqueness of each piece of real estate are just a small part of why Katie loves her job. She prides herself in listening understanding the needs of buyers and sellers to ensure that they leave the office happy. If you are interested in making a “move” in the real estate world, give Katie a call.


Office: 815-947-9040
Office Fax: 815-947-2193
Cellphone: 815-821-1322
E-mail: kate@jimsullivan-realty.com

Karen Clay


Karen has lived in Northwest Illinois her entire life and knows this is a wonderful area to both live and raise a family.  Many people remember her as Karen of Karen’s Kitchen & Catering in Stockton which she owned and operated for over 15 years.  Karen joined the Jim Sullivan Realty team in 2012 after her tenure at Karen’s Kitchen.

Karen and her husband Henry enjoy spending time with their 3 children and their families.  She feels both customer service and attention to detail are a must in the real estate field.  Karen lists and sells all aspects of real estate and looks forward to working with you to find your perfect property and next home.


Cellphone: 815-291-7917
E-mail: karen@jimsullivan-realty.com

Sadie McGowan


Sadie grew up in Lena, IL and obtained a BA from Wartburg College and a MS from University of North Texas. She moved back to the area and became a licensed agent after living in Dallas, TX for 10 years. Sadie truly enjoys helping others navigate through the home selling & buying process.


If your looking for a patient agent who will go above and beyond to help you in your search or sale, give Sadie a call!


Cellphone: 940-674-5339
E-mail: sadiejo1987@gmail.com

Hank Holm


If you’re looking for a hardworking realtor with your best interest in mind, look no further. Hank is young, energetic, and ready to go to work for you! He has learned hard work and dedication from the dairy farm he was born and raised on. To this day he continues to manage the farm and his own auction business.


Hank will work all hours of the day for you, so give him a call any time! He looks forward to hearing from you soon!


Cellphone: 815-297-5192

E-mail: hankholm.auctions.realty@gmail.com