Oltmans Construction Co, based in Ontario, CA, is a full-service general contracting company with a legacy dating back to 1932. Specializing in commercial, industrial, healthcare, education, multi-family housing, and tenant improvement construction, they are known for their integrity-driven approach and commitment to excellence.
With a focus on expertise in pre-construction, construction, and project management, Oltmans Construction Co has earned a reputation for delivering high-quality projects across the Southwest United States. Their dedication to safety, sustainability, and innovation has positioned them as a trusted building partner for over 90 years.
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