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Quality. Trust. Reliability

SINCE 1965

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500 Terry Francine St. 

San Francisco, CA 94158


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Boat Lift Installations

Need a boat lift or ramp for your kayak, cruiser, pontoon boat, or canoe? After an enjoyable day on the water, you'll want to save yourself time and stress. Reduce the stress by investing in a boat lift installation. Avoid having to manually launch and stow your watercraft by investing in a Radtke boat lift!


Since opening in 1965, our contractors have spent the last few decades improving upon our professional marine construction and boat lift installations. Ready to get started? Contact Radtke Contractors today! 


Permanent & Seasonal Docks

No matter if you need a permanent or a seasonal dock, the dock builders at Radtke Contractors can assist. We have decades of expertise in building docks that help you enjoy more time out on the water and less time on upkeep.


With a custom dock installation, you can enjoy the benefits of much easier access to the water, added security for your watercraft, increased property value, and even other uses such as swimming, fishing, and relaxing.


Give our dock builders a call today for a permanent or seasonal custom dock installation!



Foundation Piling

Investing in foundation piling is vital for building a long-lasting, solid foundation. The Radtke Contractors team has decades of experience working with many industries such as engineering, municipal, marine, residential, and commercial alike.

We use only state of the art equipment for every foundation piling. In addition to foundation piling services, our team can also perform rock boring. This allows for steel pile driving into dense hard rock materials. Contact Radtke Contractors for foundation piling services today.



What makes Radtke Contractors, Inc. stand out from the crowd? With a focus on discipline, responsibility, and family, we value our customers and always strive to put quality, honest work, and exemplary service at the forefront of what we do. Our company has been in the business since 1965 and we proudly serve a wide range of commercial, residential, and manufacturing customers in the Appleton, Oshkosh, and greater Fox Valley area.

At Radtke, we recognize that each type of project comes with its own set of unique challenges and customization options. That means we'll discuss all the details of the work with you prior to beginning any work. Our company performs quality constructing and excavating services for bridges, docks, marine, seawalls, riprap, site development, roads, excavation, foundation piling, railroads, ponds, dredging, boat ramps, and snow removal alike.


Ready to get started on your construction or excavation project? Get a quote today!

Customer Testimonials

Helen V.

Impressed with the professionalism with a light timeframe, Radtke made it work when we thought it wasn't going to happen. solid quality outcome.

Emily M.

I think this business is fantastic! Very passionate owner with extreme dedication to this business and his family. A family-run business with values and the hardest working crew. Employee retention from the past 50 years has been incredible!

We take the safety of our employees, customers, and the general public very seriously. Regular training and safety meetings are required for all employees and considered a top priority. 

Construction Signs

Family owned and operated since 1965, we know that hard work is the pathway to success. Three generations of passion and devotion continue to show in our products and services.


Since 1976, our marine contractors have lead the industry in the original design of docks, boat lifts, wharfs, and seawalls. Our designs were created with quality, durability, and functionality in mind.

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We are the experts in bridges, site development, roads, excavation, dock building, boat lifts, and more. Contact Radtke Contractors today for a quote!

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