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 better, simpler way. Six hundred and forty-one acres in Grayslake, the heart of Lake County that present a new model for development, so you can live, work and play while caring for the community and the environment. Cornerstone’s 3.6 million SF of office, R&D and light industrial space, its 600,000 SF of places to shop and eat and its 801 new homes-with-a-difference are designed to create a more sensitive and sensible environment for growth and life. Planting a flag for the Village of Grayslake’s Central Range development, Cornerstone will be phased in over 12 years, will not require TIF financing and will support the schools, government and success of Grayslake with more than $2.3 billion in economic activity. Welcome to Cornerstone.