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Johnco Construction is a top commercial construction company based in Mackinaw, Illinois, serving Peoria, Bloomington, Normal, Champaign, Urbana, Springfield, Decatur, and surrounding areas. With over 30 years of experience, we specialize in education, higher education, commercial, and military construction projects. Our team is dedicated to delivering high-quality general contracting and construction management services while supporting local charities, including autism awareness.