Explore Our Portfolio
Discover Our Featured Projects
Explore a selection of our standout real estate projects, showcasing quality and innovation in every detail.
Black Diamond Holdings is a full-service real estate development company committed to creating exceptional residential and commercial spaces that add lasting value to the communities we serve. With a focus on quality craftsmanship, strategic planning, and attention to detail, we turn vision into reality – from concept to completion.
Our portfolio includes thoughtfully designed properties that blend functionality, modern design, and long-term investment potential. Whether developing multi-unit residential projects, commercial spaces, or community-driven developments, Black Diamond Holdings is dedicated to delivering results that stand the test of time.
Driven by integrity, innovation, and a passion for progress, we take pride in building more than properties – we build opportunities, neighborhoods, and lasting partnerships.
QBS Property Maintenance, LLC provides lawn care services such as mowing, landscaping, mulching, deck installation, snow removal, spring and fall cleanups, shoreline revetment installation, power washing, pressure washing and more to the Fox Valley area.
Services
- Aeration Services
- Dethatching Services
- Fall Cleanups
- Lawn Edging Services
- Lawn Mowing Services
- Commercial Snow Removal Services
- Shoreline Revetment Construction
- Mulching Services
- Spring Cleanups
- Deck Construction Services
- Property Maintenance
- Power Washing
- Residential Snow Removal Services
- Stump Grinding and Stump Removal
Our developments are designed with purpose, function, and long-term value in mind. Each project reflects a deep understanding of both construction management and commercial usability, ensuring our clients receive a space that performs as well as it looks. Whether the project is an office, warehouse, retail space, or industrial facility, Spartan Holdings approaches every build with the same commitment to quality, efficiency, and client collaboration.
As a locally owned and operated company, Spartan Holdings is deeply invested in the communities we serve. Our team works closely with contractors, architects, and municipal partners to deliver high-quality developments that enhance the local business landscape and support sustainable growth. Beyond construction, we continue to provide our clients with consulting services and ongoing support — helping them make informed decisions that protect and grow their investment.
At Spartan Holdings, we believe that successful development comes from strong partnerships, thoughtful design, and a commitment to long-term value. Our mission is simple: to help businesses grow by creating spaces that are built to perform, built to last, and built to suit their unique vision.
Zentner’s Auto Service has been a cornerstone of automotive excellence in Northeast Wisconsin since 1958. As a family-owned and locally operated business for over 60 years, we pride ourselves on delivering reliable and consistent service. Zentner’s Auto Service provides auto maintenance, fleet vehicle services, oil changes, steering, suspension, and brake services to Northeast Wisconsin.
Poygen Properties is a premier short-term lakefront rental located on the shores of Lake Poygan, designed to blend lifestyle appeal with long-term investment strength. This property showcases the kind of strategic acquisition and high-quality management that define our investment approach – combining steady short-term rental income potential with meaningful asset appreciation.
Surrounded by natural beauty and year-round recreation, Poygen Properties attracts consistent demand from vacationers, anglers, and families seeking an upscale lakeside experience. Its proximity to the Fox Valley ensures strong occupancy rates throughout the seasons while offering investors exposure to one of Wisconsin’s most desirable waterfront markets.
This project reflects our core investment philosophy: acquire exceptional properties in high-demand locations, elevate them through thoughtful development, and deliver lasting value to our partners.
Founded in 2010 by brothers Marshall and Elliott Rader, The GFB has become a leading name in the gluten-free food industry by proving that healthy eating can also taste great. What started as a mission to create a nutritious, good-tasting protein bar has grown into a thriving brand focused on producing high-quality, responsibly made foods.
The company emphasizes sustainability, integrity, and community — sourcing wholesome ingredients, supporting local jobs, and continually innovating in the healthy snacking market. Today, The GFB’s commitment to quality, transparency, and positive impact has positioned it as both a respected food manufacturer and an example of values-driven business growth.
Founded on the belief in the power of real food, Hudson Henry has become a standout brand in the natural foods market by crafting small-batch granola made with clean, premium ingredients and no unnecessary additives. Each batch is hand-baked using wholesome ingredients like pure olive and organic coconut oils, rolled oats, and real maple syrup — delivering exceptional flavor with minimal added sugar.
Hudson Henry’s commitment to transparency, health, and sustainability has earned the company multiple Specialty Food Association awards, recognizing its innovation and excellence in product quality. With certified non-GMO, gluten-free, and vegan recipes, Hudson Henry continues to grow as a trusted name among health-conscious consumers seeking better-for-you options without compromising on taste.
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- Tailored strategies to enhance your portfolio.
- Collaborative partnerships for mutual success.