Fiber optic cables retail, on average, for a cost between $1 and $6 per foot for the cable alone. If you buy wholesale, then you can get fiber optic cable for $0. Commercial building installations with 100-200 network drops generally range from $15,000 to $30,000. Single-mode fiber costs less per foot than multimode fiber, but it requires more. Buyers typically pay for fiber optic cable by length, fiber type, and installation complexity. This guide presents ranges in USD and practical price estimates to help. Single-mode fiber (OS2): This is the industry workhorse., 12-core vs 96-core) and brand.