Fiber optic cable installation costs average $4,500 for most homeowners, with most installations ranging from $1,500 to $7,000. The main cost drivers include material type, run length, trenching or aerial work, and any required permits or inspections. Total Project Costs: For commercial installations, expect costs ranging from $5,000 to $20,000 per mile for underground projects and from $40,000 to $60,000 per. Whether you need singlemode, armored, or indoor plenum, this guide gives you the exact cost per foot of fiber optic cable — including installation — so you can budget without guesswork. This guide provides practical price ranges in USD and real-world. On average, it costs between $1,000 to $1,250 per residential household passed or $60,000 to $80,000 per route mile, to “lay” or bury fiber optic cable.