Our Communities.

Coming in 2018: Muskego, Brookfield and Franklin! Details soon!

Cornerstone Development, headquartered in Sussex, WI, is the preeminent developer and builder of ranch-style Wisconsin condominium communities. Cornerstone’s The Glen at Seven Stones in Sussex, captured the 2015 MBA Achievement Award for Best Development of the Year!

Our Models

Our Wisconsin condominium developers offer ranch-style condo floor plans varying in designs, construction features, and lifestyle.

Our innovative communities are designed to appeal to retirees, rising young executives and single-again buyers. Visit or call us to learn more about unique, comfortable, hassle-free living!

Schedule a Tour

Our main office is located at:

N63 W23849 Main Street
Sussex, WI 53089


Schedule a tour of any community.  Click  “Visit Us”  and call the phone number of the community you would like to see. We look forward to meeting you!

Welcome to Cornerstone’s Completed Neighborhoods!!

Great New Lifestyles Now Being Enjoyed Every Day!

Cornerstone Development is helping people build new lifestyles each and every day!  The “proof in the pudding” rests in how quickly our neighborhoods have been selling out.

Take a brief photo tour and see for yourself!


Get to know The Glen at Cedar Creek

Cornerstone Development of SE Wisconsin proudly invites you to tour our newest community, The Glen at Cedar Creek in historic Cedarburg.

Single-Family homes located in a beautiful country setting.. just minutes from all of the conveniences you desire!

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Featured Model: The Aberdeen

Bedrooms: 2  Baths: 2  Laundry: Main level  Sq. ft.: 1,667

  • All
  • The Glen at Cedar Creek
  • The Glen of Greenfield
  • The Villas at Maplewood Terrace
  • The Woodlands at Greenfield
The Villas at Maplewood Terrace
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The Villas at Maplewood Terrace
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What our homeowners say about us.

Our company news

Keep up with the happenings at Cornerstone Development!

  • The Glen at Seven Stones Honored as ‘Best Development’ Sussex, WI – Cornerstone Development of SE Wisconsin LLC is excited and proud to announce that The

  • Apparently, Wisconsin is the place to go for an active, enjoyable life after age 50. At least, that’s what a new livability index from AARP says. Apparently, Wisconsi

  • Cornerstone Development Succeeds Offering Appealing Lifestyle Options One suburban condominium developer continues to enjoy remarkable success with ranch-style condominium

Learn more. Schedule a tour!