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Johnco Construction, founded in 1986, is a leading commercial construction company in Central Illinois, serving Peoria, Bloomington, Normal, Champaign, Urbana, Springfield, Decatur, and surrounding areas. We specialize in general contracting, construction management, and design-build services for various sectors including education, higher education, commercial, military, and more. Our team is dedicated to delivering high-quality projects that meet our clients' needs while maintaining a focus on integrity, quality, and timely delivery.