Explore the opportunity to fulfill your vision. Keystone Design Build, Inc. has a proud tradition of hands-on ownership and a commitment to customer satisfaction. Over 22 years of experience, and focus on detail has made Keystone a leader in the construction industry. Our experience has been one of diversity in both style and functionality which allows us to offer our clients virtually unlimited building design opportunities. Additionally, focus on budget, realized through strong relationships with our subcontractors and innovative sourcing capabilities consistently reduces costs for our clients.