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Logo of Keller showcasing their brand identity as planners, architects, and builders, featuring a stylized design with abstract building elements.

Experience The Keller Difference.

WISCONSIN-BASED DESIGN-BUILD GENERAL CONTRACTOR

CONSTRUCTION EXCELLENCE SINCE 1960

When you choose Keller, you aren’t just hiring a construction company; you are partnering with a team of 100% employee-owners dedicated to bringing your vision to life. As leading builders in Wisconsin for over 65 years, we have built our reputation on a simple but powerful philosophy:

Build It As If It Were Your Own

OUR EXPERTISE

  • Design-Build
  • Commercial Construction
  • Construction Management
  • Agriculture
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Experience the Keller difference

The Keller Difference begins with our people, our culture, and our commitment to doing what’s right. As a 100% employee-owned commercial construction company, every member of our team is personally invested in the success of your project. That ownership mindset drives us to bring our best effort every day, treating each project as if it were our own while building relationships that last long after construction is complete.

As experienced commercial contractors, Keller manages every phase of your project through our integrated team of planners, architects, and builders. Our design-build approach allows us to handle every detail in-house, creating a seamless process that improves communication, efficiency, and project outcomes.

From our headquarters in Kaukauna to our regional offices in Milwaukee (Germantown), Madison (Sun Prairie), and Wausau, Keller serves organizations across Wisconsin as a trusted commercial construction contractor. As employee-owners, we approach every project with pride, accountability, and the mindset to build it like we own it because we do.

WHAT SECTORS DOES KELLER SPECIALIZE IN?

We are versatile commercial contractors with extensive experience across multiple sectors. This includes healthcare facilities (dental, veterinary), office buildings, and manufacturing/production spaces. We also maintain our deep roots in the farming community as premier agricultural builders. 

WHAT ARE THE BENEFITS OF WORKING WITH EMPLOYEE-OWNED CONSTRUCTION CONTRACTORS?

Working with an employee-owned firm like Keller means you are working with a team where every individual is fully invested in your project’s success. This culture of ownership translates to exceptional quality, greater accountability, and a more dedicated level of customer service compared to traditional contractors. 

HOW DOES THE DESIGN-BUILD MODEL BENEFIT MY PROJECT BUDGET AND TIMELINE?

As your commercial construction contractors, our design-build model puts architects and builders on the same team from day one. This integrated approach allows for more accurate budgeting, faster project delivery, and the elimination of the friction often found between separate design and construction firms. 

WHERE DOES KELLER PROVIDE SERVICES?

While we are headquartered in Kaukauna, WI (Fox Cities), we serve as builders throughout the state with dedicated offices in Germantown (Milwaukee area), Sun Prairie (Madison area), and Wausau. 

WHAT OUR CUSTOMERS ARE SAYING

Modern exterior of Verona Family Dental building featuring a combination of stone and wood elements, large windows, and landscaped entrance, situated in a well-maintained parking area.
"We had a great experience with Keller in building our Dental Practice. We had originally hired another group for the project, but quickly realized they didn't seem to have our best interest at heart. Thank you to Keller for making our dreams a reality!" - Dr. Kelsey Patton, D.D.S., Co-Owner at Verona Family Dental
Indoor gymnasium with polished wooden basketball court, multiple basketball hoops, and bleachers. The space features high ceilings with ventilation and ample natural light from large windows, creating an inviting athletic environment. Ideal for sports practices and events.
"I can’t say enough about the Keller team and their ability to deliver. We had an extremely tight timeline to complete our school expansion which was made more difficult by supply chain disruptions. The Keller team was able to get us into the classrooms we needed on time and on budget. In addition, the entire team was a pleasure to work with. From their leadership to the crews onsite, they were respectful, considerate, and displayed a strong commitment to meeting our needs.” –Nate Paul, Chief Operating Officer at 922 Ministries
Modern office building of VandenHoek-VanDrewten Wealth Management, featuring a sleek design with large windows, landscaped surroundings, and a parking area. Located in a green, open area, this building emphasizes accessibility and aesthetics.
“From the Project Manager, to the Architect and Designer, they saw our vision and collaborated with us to create an exceptional final product. We appreciated their open and honest communication and attention to detail – every element was discussed and documented and there were no surprises. The Supervisor and Foreman of our project were quick to respond to questions and held the subcontractors to meticulous and precise work while maintaining a safe working environment. The entire design-build Keller team that we worked with were very professional, yet truly made it a fun and friendly process.” – Mike Verstegen, Partner at VandenBoom Verstegen Wealth Management
Modern bar and dining area featuring a sleek countertop, wooden furnishings, and stylish pendant lighting. The space is designed for social gatherings, with comfortable seating arrangements and a well-stocked bar, creating a welcoming atmosphere for patrons.
“Our club began an extensive remodel project during what would widely be considered “a difficult market.” Keller did a very nice job delivering a great product on time and on budget. A job well done!!!” - Tom Duffy, President at Butte des Morts Country Club
Modern commercial building with a distinctive orange accent, surrounded by well-maintained landscaping and a spacious parking lot. The structure features large windows, highlighting its contemporary design and inviting entrance, situated near a retail complex and green spaces.
“Most impressive to me, was how open and transparent everyone at Keller, Inc. was throughout the entire building process. During a year when the words “supply chain issues” were part of every conversation, Keller managed the process efficiently to ensure the building was completed on time. The Bank is so pleased with the design of the Howard Branch, the construction process, and Keller’s ability to deliver the project on time and within budget, we have contracted multiple projects throughout the last few years. If you have any questions, or would like a tour, please feel free to contact me.” — Tim Treml, President/CEO at Bank of Luxemburg
A luxurious jet in a spacious hangar, showcasing its sleek design and polished exterior, with other aircraft visible in the background and high ceilings illuminating the space.
"During our first project working with Keller, they were open and honest throughout the entire process, while keeping the project on schedule and in budget. When the time came to design our second hangar, Keller was my first call. I would recommend Keller, Inc. to anyone in the aviation industry looking for a design/build partner." — Michael Stein, Owner at Stein’s Aircraft Services, LLC
Aerial view of a modern agricultural farm featuring large storage buildings, silos, and expansive green fields under cloudy skies, highlighting farm infrastructure and land use efficiency.
"For any of my friends, neighbors, fellow dairymen, I would highly recommend hiring Keller, Inc. to do a job. We felt we were getting the best value for our dollar with Keller, Inc.." – Amber Horn-Leiterman, Owner at Hornstead Dairy

AWARD-WINNING, 100% EMPLOYEE-OWNED DESIGN-BUILD GENERAL CONTRACTOR