Cornerstone is a 640-acre mixed-use environment in Grayslake, IL, that brings together offices, light industrial, R&D, luxury residences, shopping, and marquee restaurants in the heart of Lake County.


Cornerstone is a visionary example of compact development and green solutions that creates a responsible model for long-term growth. With Lake County poised to grow by 200,000 new residents in the next 15 years, Cornerstone answers the region’s need for the housing, services, employment and recreation needed to sustain this burgeoning population. We invite you to survey some of the important research and case studies that consider the issue of how to grow responsibly in a way that respects the community and the environment.