Median costs in 2025 were $18 per foot for underground builds and $8 per foot for aerial builds, with significant variation based on terrain, density, and construction methods, according to the Fiber Broadband Association. The material cost alone spans $0. 00 per foot, while total installation costs can reach $15-$35 per foot. Fiber-optic cable materials typically cost $1 to $6 per linear foot, depending on fiber count and cable type. Single-mode fiber costs less per foot than multimode fiber, but it requires more. These networks are constructed both underground and through aerial fiber, at an average cost of $1,000 to $1,250 per residential household passed or $60,000 to $80,000 per mile. This breakdown gives you real numbers to build better estimates. We'll show actual costs for materials, labor, and hidden expenses that can kill your profit margins. Buyers typically pay for fiber optic cable by length, fiber type, and installation complexity.
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