Established in 1919, Linn-Mathes Inc. (LM) is a trusted general contractor and builder based in Chicago, IL. Now in our third generation of family ownership and operation, we specialize in performing commercial, industrial, mixed-use, and residential building projects in the Chicago, IL area. With our emphasis on total integrity, quality, and on-time, on-budget project completion, LM is the preferred construction partner of many local clients.