Building Relationships

Cornerstone places a high value on building relationships with our subcontractors and suppliers. More than a decade of working on projects in western Washington has provided us the opportunity to establish strong connections with a broad range of partners in the greater Puget Sound region. Our fair and honest approach, along with our reputation for executing projects in a safe, well-coordinated, properly scheduled, and productive environment, has made Cornerstone one of the preferred partners for many local subcontractors and suppliers. Our current and future success is based on growing new relationships while maintaining our existing ones.

Sign Up!

If you would like to be added to our database of subcontractors and vendors to receive invitations to bid on Cornerstone projects, please sign up to tell us about your company.

You can find out about our current and upcoming projects at Builders Exchange of Washington.

We also send out our bid invitations via Building Connected.


“Cornerstone is a contractor that has a lot of integrity… I know I can trust them. I know they’re going to be fair, including on bid days… They’re just somebody you can count on. If you need them they’re there.”

—Mike Hinson, Senior Project Manager
Diamond B Constructors