Fiber Type and Count: Single-mode fiber typically costs $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. The pricing of single-mode fiber optic cables varies significantly based on construction, application, and specific features. On average, the cost can range from $2. 00 per foot 3 for bulk cables, with variations for pre-terminated assemblies 4 and armored cables 5, making it essential for. Single mode fiber is a type of fiber optic cable with a very narrow glass core, about 9 microns in diameter, that carries light in a single path rather than bouncing it along multiple routes. Although they can do the same job in some instances, the different construction methods make each of them better suited to certain tasks and budgets.