Wisconsin Condominium Developer


Cornerstone Development, headquartered in Pewaukee, is the pre-eminent Wisconsin condominium developer and builder of ranch-style condominium communities. In response to the fundamental demographic and cultural changes transforming our society, our founder, John Wahlen began building single-story condominiums in the Milwaukee area in 2005.


Each of our ranch style condo floor plans provide an array of design, construction features, and lifestyle which appeals specifically to retirees, rising young executives and single-again buyers. In addition, each neighborhood condo community enhances the carefree lifestyle with an on-site clubhouse with a fitness center, community room and outdoor amphitheater.


Cornerstone Development is a team with over 25 years of engineering, construction, sales and development management with a highly successful track record of neighborhood creation in southeastern Wisconsin. As a Wisconsin condominium developer, we are proud to bring you “The Glen’s” in the fine municipalities of Sussex and Mukwonago. Their mission is to provide an exceptional community of single story living creating an environment where people can enjoy a carefree lifestyle, an enriched life, and a neighborhood that provides one remarkable experience.


These Mukwonago condos and Sussex condos are committed to providing you with homes that have the highest quality of workmanship.
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