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J G Development We build homes, we build commercial structures, we build places of worship, and we build more. But what we really love to build is intangible: trust and long-lasting relationships. To that end, we're a quality-focused organization. And to deliver quality, we offer the specific knowledge, experience and expertise your project needs through our four divisions.

Brio is our new home building division staffed with talented designers and craftsmen who are experts in creating masterpiece homes. Vive is our home remodeling division that specializes in large-scale transformations, whether whole home, additions or single rooms, inside and out.
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JG Development was founded in 1990 by Jeff Grundahl, and his wife Mary Grundahl joined as co-owner in 2005. Still majority owners, the Grundahls began the process of transitioning the company to employee ownership in 2018. Jeff and Mary are long-time residents of Mount Horeb, Wisconsin. Together, their goal is continued growth of JG Development and its four divisions, and the industries and communities they impact.
A local and employee-owned company, JG Development brings the best of design, project management, carpentry, and business knowledge to each of our four divisions in the greater Madison area. From home remodeling to large-scale corporate construction and everything in between, these are the faces who are here for you every step of the way.
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