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Michael Ertmer listing and buyer's agent for N4220 S Lakeshore Dr, Markesan, WI - sold for $1,750,000
Sold $1,750,000
Michael Ertmer listing and buyer's agent for W2176 Tuleta Hill Rd, Markesan, WI - sold for $1,650,000
Sold $1,650,000
Michael Ertmer listing and buyer's agent for Lot 3 Bay Rd, Brooklyn, WI - sold for $290,000
Sold $290,000
Michael Ertmer listing agent for 453 North St, Green Lake, WI - sold for $680,000
Sold $680,000
Michael Ertmer buyer's agent for W6924 S Silver Lake Rd, Wautoma, WI - sold for $1,040,200
Sold $1,040,200
0 S Washburn St, Oshkosh, WI For Sale $3,663,600 - listed by Michael Ertmer
For Sale $3,663,600
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Michael Ertmer

Green Lake WI
Better Homes and Gardens Real Estate Special Properties
113 Closed Sales
$58.7M Total Value
$20K - $2.2M Price Range
$519.4K Average Price
Prior 5 years

About Michael

Meet Mike Ertmer

Real Estate Broker | Better Homes and Gardens Real Estate Special Properties

Mike’s journey into real estate started long before he sold his first home. With a background in the travel industry dating back to 2004, sales and client relationships have always been at the core of his career. After years in travel marketing and technology—living in cities like Milwaukee, Appleton, and Berkeley—he eventually found his way to Green Lake in 2017. It didn’t take long for him to realize he was home.

For Mike, real estate is all about connection—matching people with homes and communities that fit their lifestyle and dreams. Whether he’s helping buyers find their perfect lakefront getaway or guiding sellers through passing their property to the next generation, Mike brings energy, strategy, and genuine care to every transaction.

Each day in real estate brings something new—new people, new challenges, new stories. That’s what keeps Mike inspired. He’s proud to represent some of Green Lake’s most remarkable homes and is deeply invested in the community. As a member of the Green Lake Chamber Board of Directors and a familiar face at local events, Mike’s passion for Green Lake goes far beyond the business.

When he’s not working, you’ll likely find him at the gym, on the boat, or out on the golf course. A traveler at heart, Mike loves exploring new destinations—especially when it means reconnecting with friends in places like Florida or California. But no matter where he goes, Green Lake will always be home base.
Home Types: House, Lot/Land, Commercial, Condo, Townhouse
Years of Experience: 7

Transaction History

Seller Deals

Total Deals 22
Total Value $11,672,816
Average Sale Price $530,583
Price Range $40K - $2M

Buyer Deals

Total Deals 15
Total Value $8,680,099
Average Sale Price $578,673
Price Range $59K - $2M

Production Over Time

1 Year View by Quarter

Seller Deals

Total Deals 38
Total Value $23,805,066
Average Sale Price $626,449
Price Range $40K - $2.2M

Buyer Deals

Total Deals 22
Total Value $11,570,199
Average Sale Price $525,918
Price Range $59K - $2M

Production Over Time

2 Year View by Quarter

Seller Deals

Total Deals 72
Total Value $37,099,466
Average Sale Price $515,270
Price Range $20K - $2.2M

Buyer Deals

Total Deals 41
Total Value $21,594,039
Average Sale Price $526,684
Price Range $23K - $2M

Production Over Time

5 Year View

Michael's Listings and Deals

Awards and Designations

  • NAR - National Association of Realtors
  • ABR - Accredited Buyer Representative

Other Experience

First Time Homebuyers, Investments, Luxury Homes, New Construction
Agent License: Wisconsin #5925590
Agent Photo

Michael Ertmer

(920) 744-3801
(920) 744-3801

Nearby Homes