Zellner Real Estate
For the love of Fond du Lac
Zellner Real Estate serves families, first-time buyers and seasoned sellers across Fond du Lac, Waupun, Oshkosh, Beaver Dam and the surrounding communities. We also understand the unique needs of Wisconsin businesses and provide insights to match the right property with your vision.
We help you find home in the heart of Wisconsin.
We are a Full Service Real Estate Brokerage.
Zellner Real Estate is proud to be a locally owned real estate team rooted in Fond du Lac. Whether you're buying your first home or selling a property you've owned for years, Zellner Real Estate offers personalized service, honest guidance and in-depth market knowledge - with none of the corporate runaround. And if you’re looking to lease your first office, purchase a retail space, or invest in commercial property, we bring decades of local expertise to help you make confident decisions.
My name is Jason Zellner.
As a lifelong Fond du Lac resident and Broker-Owner, I serve buyers and sellers in Fond du Lac, Waupun, Oshkosh, Beaver Dam and the surrounding communities.
I've spent nearly 20 years in real estate and am proud to call Fond du Lac my home. Whether you're buying your first house, investing or selling, I bring local insight and full-spectrum support to guide you every step of the way.
Our Team: Real People. Local Experts. On Your Side.
At Zellner Real Estate, you’re not just working with one agent — you’re backed by a team of real people who live and work right here in the Fond du Lac area. Each of us brings something different to the table — whether it's deep market knowledge, construction insight, or marketing savvy — and we work together to make sure your buying or selling experience is smooth and successful.
We don’t hand you off or pass you around. We show up, communicate clearly, and stay connected through every step of your real estate journey.
Feel free to contact us at anytime or stop by our office!
What We Offer
Buyers
Looking for your next move in Fond du Lac, Waupun, Oshkosh, or Beaver Dam? Zellner Real Estate helps buyers at every stage - from first-time homeowners to families ready to upsize or relocate. We work with trusted local lenders, inspectors and service pros to make your process as smooth as possible.
Leasing Services
We provide full-service support for both tenants and property owners. Whether you’re searching for the ideal space or marketing a property to attract quality tenants, we guide you through every step — from lease negotiations to renewals — ensuring competitive terms and a smooth process.
Sellers
Selling a home is a big decision - and we're here to make it easier. Zellner Real Estate provides strategic pricing, professional photography and marketing tailored to your neighborhood and goals. We support sellers from listing to closing and keep communication clear every step of the way.
Commercial Sales
We assist with the buying and selling of office buildings, retail spaces, warehouses, and more. Our team delivers precise property valuations and in-depth market trend analysis to help investors make informed decisions and confidently expand their portfolios.
Land & Rural Properties
If you're buying or selling land near Fond du Lac or across rural Wisconsin, we get it. Our team understands the value of space, whether it's a few acres for a hobby farm or a future build site. We regularly work with off-market properties, builders and buyers who want more than a neighborhood lot.
Real Estate Solutions
Whether it’s a home in the city, a quiet country escape, a lakefront property, or a prime commercial space, we’ll help you find exactly what you need.
Kristin Schneider
2025-10-23
Jason was a pleasure to work with! He was professional, reliable, knowledgeable, and provided a seamless and stress-free experience selling our first home. I highly recommend-thank you!!
Caleb Webster
2025-10-21
Zellner Real Estate and specifically Mark Grahl have been fantastic to work with in the recent purchase of our new home and property. We looked at several properties prior to this one we have now purchased, and with each one our best interest was kept as top priority! High integrity and definitely would recommend to others!
Shawn Beringer
2025-09-05
Christy Wasieleski is totally awesome! She helped us buy our home with a great,professional,fun experience. She helped us with all the bumps we had,kept us to stay positive and really made our experience so much fun. I will and would recommend her to everyone. Thank you so much Christy
Jennifer Luebke
2025-09-02
Jason helped us sell our Dad’s home after his passing. Jason did a great job in not only marketing the home to attract the right buyers but also due to his extensive knowledge and network was able to help us navigate some of the services needed through local contractors which was a tremendous help as we navigated this from another city. Jason is personable and knowledgeable and I would definitely use him again!
Zaira Tolentino
2025-08-23
Sarah is the best realtor you could ever have.She was very communicative, professional and reliable.You want the best for your family then you need to choose the best like her.Thank you so much for selling our house .We are grateful to have you as our realtor.Allan and Zaira
Kaitlyn Jochman
2025-08-20
We are so thankful for our amazing realtor Christy! From the very beginning, she was exactly what we needed, kind, helpful, and always available to answer our questions. Selling a home can feel overwhelming, but she made the entire process smooth and stress-free. She handled every situation with confidence and made sure every decision was in our best interest. Her knowledge, professionalism, and genuine care for us stood out in every interaction. She guided us step by step, explained everything clearly, and went above and beyond to make sure we felt comfortable and supported. We always knew she was looking out for us, which gave us so much peace of mind. Not only is she a fantastic realtor, but she’s also just such a wonderful person to work with. So approachable, easy to talk to, and truly invested in helping us succeed. She made what could have been a stressful experience feel exciting and positive. We can honestly say she is THE BEST, and we would recommend her to anyone who wants a realtor who truly cares and delivers outstanding results.
Nick Losse
2025-08-15
Was amazing to work with! Listen to what we wanted and never gave up on us through the up and downs! So happy we found the one with his help! 10/10 recommend Mark!!
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