A Locally-Owned, Community-Centered,
Full-Service Contractor

Renovating a Home & Redeeming an Industry

The Most Trusted Contractor in Southern Wisconsin and Beyond

Serving with integrity, humility, gratefulness, and kindness

With decades of experience providing roofing, siding, gutters, windows, and full renovation services throughout Southern Wisconsin, our team has the expertise to accurately and thoughtfully assess the overall condition of your home and provide real solutions that meet the demands of our harsh weather and regional terrain while also meeting the needs of your family. We work to earn your trust by  transparently sharing our industry knowledge honestly, so you can make the best, most informed decisions for your home remodel or improvement project.

Listen To Our New Podcast

Are you a homeowner looking to tackle some DIY renovations, but don’t know where to start? Maybe you’re looking for a contractor, but struggling to find the right person to hire? Introducing Under Construction: Renovating A Home, Redeeming An Industry, your ultimate guide to DIY renovations and finding the perfect contractor for your home improvement needs. Join hosts Erik Dieringer, the seasoned owner of Big Fish Contracting, and Tanya Weltzin, the office manager at Big Fish Contracting, as they share their wealth of knowledge and experience accumulated over their impressive 30-year career in the industry.

Win a Free Roof

Comprehensive, Reliable Commercial and Residential Contracting Services

Big Fish Contracting is a full-service contracting company with deep roots in Southern Wisconsin. Our vetted, experienced construction teams provide total home improvement solutions that meet our clients’ needs while adding value, beauty, and longevity to their homes.











Decks and Outdoors

Decks & Outdoors

Insurance Claims

Insurance Claims

Experience Unmatched Expertise & Support for Your Next Project

At Big Fish Contracting, we are so much more than a general contractor. We understand the science of homes and assist our homeowners clients in actualizing their design vision while actively improving the longevity and value of their home. Over the years, our team has worked diligently to bring integrity back to an industry crucial to the safety and stability of families everywhere. We started by offering top-quality roofing and have organically grown to meet our skill level and knowledge in siding, gutters, soffit, fascia, windows, and remodeling. We understand the science of homes and work to provide reliable and total solutions for our clients using the most vetted and advanced technology available.

Experience Unmatched Expertise
Storm Over a House

Handle Natural Disasters with Confidence 

Maximize Your Insurance Claims with Big Fish Contracting

When it comes to Wisconsin, there’s nothing more volatile than our weather. From hail and tornadoes to ice buildup and dry summer heat, there are a lot of things that cause immediate damage to your home.

When these disasters occur, you need a trustworthy, reliable contracting team to help you with:

  • Support During Adjuster Assessment
  • Independent Assessment of Damage
  • Detailed Repair Recommendations
  • Adjustment Summary Review & Project Approval
  • Material Recommendations

Explore Our Contracting Work in Wisconsin

Look through our portfolio of work to find out why our clients recommend our services to friends and family across Southern Wisconsin or explore an interactive map that shares all the projects we’ve completed throughout Wisconsin.

Hear What Our Clients Have to Say

Hear What Our Clients Have to Say

Real Stories from Real Homeowners in Wisconsin

“ If I need further repairs done to the rendering on my house I shall not hesitate to use Big Fish Contracting.  He knows his job.  Erik fully explained what he would do, gave me a fair estimate, carried out the work skilfully and conscientiously and kept the site safe and tidy. I would thoroughly recommend him to anyone wanting similar work carried out! “

Tim | New Berlin

I would recommend Big Fish Contracting to anyone. They are efficient, clean, reliable and there work is excellent. In today’s world it is hard to find someone you can trust. I found that in Big Fish Contracting.

Chris and Julie | Waukesha

As a single mom with a limited budget and very little knowledge of what I was doing, Erik walked me through the entire process from start to finish, explained all my options, and made me feel comfortable with my decisions. He was friendly and professional as well his entire crew. They were a pleasure to have at my home.

Gina | Oconomowoc

Industry Advice

Tips, Tricks, and Expert Guidance to Support Your Next Renovation Project

At Big Fish Contracting, we believe inf providing real solutions that add value and security to your home. We work with you to create an effective plan to improve your home, following the right steps every time. We continually write informative articles to educate our clients and help them make the right decisions for their home. For more information on roofing, siding, and remodeling, check out our Industry Advice.

Check Out Big Fish Contracting Behind the Scenes

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