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Our Agents

Mark Oldenburg

Buyer's Agent

Mark Oldenburg

(608) 519-7848

I never knew as a child all the weekends and summer days helping my dad build homes while filling dumpster after dumpster with building materials and saw dust would help me years later. I developed an interest and passion for homes that stretches further than just the finished product. My wife and I currently reside in Onalaska with our 5 year old son Nolan, and 2 year old daughter, Collins. I enjoy spending time with my family, sports, hunting, camping, board games and brewery tours. My past experience and desire to get my customers and clients results, while providing exceptional service along the way motivate me every day. I look forward to helping you buy or sell your next castle! 

I am a member of:

National Association of Realtors

Wisconsin Realtors Association

La Crosse Area Realtors Association

I am also part of the Castle Realty Expert Advisor Team, where we are using a proven strategy to net our clients more money and make the transaction more efficient.

The Expert Advisor Team includes

  • Listing Agents
  • Buyers Agents
  • Showing Agents
  • Marketing Director
  • Transaction Coordinator
  • Office Manager
  • Inside Sales Agent

All working together to take your transaction from beginning to close with individual expertise and a common goal.

In 2017 the Castle Realty Expert Advisor Team:

  • Closed 230 transactions
  • Attended NAEA National Convention in Dallas TX
  • Held 3 Customer Appreciation Events
  • Continuing our Vendor Program to better serve our clients
  • The Castle Finder App, the best Real Estate App available
  • Continued to improve on the best local Real Estate website around
  • Participated in numerous community events including Steppin’ Out In Pink and Children’s Miracle Network Hospital Radiothon

Call or text me at 608-519-7848 or emial me at

My Listings

1532 Kane St, La Crosse, WI 54603
Type:Single Family
Baths:2 full / 0 half
Sq. Ft.:1415
MLS #1570397
Listing courtesy of: Castle Realty, LLC