Providing a single cost per foot for an underground power line is not possible because the price varies dramatically based on a wide range of project-specific factors. For residential projects, the cost can range from $5 to over $30 per linear foot. For high-voltage transmission lines, the cost can be many times higher, reaching $200 to over $1,000 per linear foot.

The total cost is a combination of labor, materials, and specialized equipment. Here is a breakdown of the key factors that influence the final price.