About Mike Ertmer

Mike Ertmer is a leading real estate professional in Green Lake, specializing in lakefront homes and vacant land, lake access properties, and luxury real estate on Big Green Lake and throughout the surrounding area. Known for his strategic marketing approach and deep understanding of the second-home market, Mike works with both buyers and sellers seeking exceptional properties in one of Wisconsin’s most sought-after lake communities.

With a background in sales, marketing, and technology dating back to 2004, Mike brings a modern, results-driven edge to real estate. His experience in both travel marketing and travel technology gives him a unique advantage—understanding exactly how to position homes to the right audience, especially buyers from key feeder markets like Chicago, Illinois, Minnesota, and across the Midwest searching for vacation homes and lakefront retreats.

Since settling in Green Lake in 2014, Mike has become deeply connected to the community and its lifestyle. He serves on the Green Lake Chamber Board of Directors, Green Lake Association committee, and is actively involved in local events, giving him a strong pulse on both the market and the people who make this area special.

Mike’s approach to real estate is simple: maximize exposure, attract qualified buyers, and deliver results. From high-end waterfront estates to lake access properties and off-water homes, he tailors every marketing strategy to highlight what makes each property unique—whether that’s sandy shoreline, sunset views, or proximity to downtown Green Lake.

For buyers, Mike provides a competitive edge in a fast-moving market, helping clients secure everything from luxury lakefront homes to weekend getaways with confidence and clarity.

When he’s not working with clients, you’ll find Mike enjoying the very lifestyle he sells—boating on Big Green Lake, golfing, staying active, and traveling whenever he can.

If you’re considering buying or selling real estate in Green Lake, WI, Mike Ertmer offers the expertise, marketing, and local knowledge to help you make the right move.