Our Communities.

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:
Cornerstone Developments of S.E. WI, LLC
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!

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!

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 Glen of Mukwonago
  • The Glen of Oconomowoc

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 Glen at Seven Ston

  • 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, Wisconsin is t

  • 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!