Buyers typically pay for underground power by the foot plus associated work such as trenching, conduit, and permitting. Main cost drivers include trench depth, conductor size, conduit type, and local permit requirements. The price per foot often combines materials and labor into a single estimate.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Cost per foot (materials and labor) | $20 | $40 | $70 | Assumes standard conduit and residential load |
| Trenching and excavation | $6 | $14 | $28 | Soil type affects depth and cost |
| Conduit and cable | $4 | $10 | $20 | PVC or conduit grade varies by region |
| Permits and inspections | $100 | $400 | $1,000 | Local rules can spike fees |
| Delivery, trench backfill, and restoration | $2 | $8 | $16 | Site restoration costs included |
Overview Of Costs
Cost ranges reflect typical residential underground feeders from the utility to the main panel. The total project is usually estimated per foot plus fixed permit costs. Per foot pricing commonly spans a wide band because trenching difficulty, soil conditions, and local permit rules vary widely. Assumptions include standard 60 to 100 amp service and basic copper conductors.
Cost Breakdown
| Materials | Labor | Equipment | Permits | Delivery/Disposal | Warranty | Taxes |
|---|---|---|---|---|---|---|
| $8-$25 per ft | $12-$26 per ft | $2-$6 per ft | $100-$1,000 per project | $0-$5 per ft | 1-2 years | Local taxes vary |
Pricing Variables
Helps explain price variation Trenching depth and soil type are major drivers; harder soils or rock add hours and equipment needs. In tighter urban corridors, service disconnections and street restoration can raise costs. Conduit material and conductor gauge affect both upfront and longevity costs.
Ways To Save
Strategies to reduce overall spend Plan work during off peak seasons when crews are available. Request combined utility work and electrical upgrades to share trench costs. Compare multiple quotes and verify permit requirements before work starts.
Regional Price Differences
Prices fluctuate by region In the Northeast and West, trenching and permitting tend to be higher due to regulation and labor rates. In the Midwest and South, costs often run lower but can spike with soil conditions and permit timing. Expect a typical regional delta of about 5 to 18 percent compared with national averages.
Labor, Hours & Rates
Labor can dominate the bill For a 60 to 100 ft run, crews may spend 6–18 hours depending on trenching difficulty and inspection windows. Local hourly rates commonly range from $60 to $120 per hour per crew member, with a small mobilization fee.
Permits, Codes & Rebates
Permits and incentives influence net cost Permit fees vary by city and utility district, often $100 to $1,000. Some regions offer rebates or credits for undergrounding lines or upgrading to higher efficiency equipment. Always check local rules before finalizing a project scope.
Real-World Pricing Examples
- Basic Run 60 ft, standard PVC conduit, 60 amp service, no trench rock, urban yard. Materials and labor total $2,400; per foot $40; permits $250. Assumptions: standard soil, moderate access.
- Mid-Range Project 90 ft, upgraded conductor, medium trench depth, suburban lot. Materials and labor total $4,000; per foot $44; permits $500; disposal and restoration $150. Assumptions: average soil and access.
- Premium Installation 150 ft, high gauge cable, deep trenching, rural site with challenging soil. Materials and labor total $9,000; per foot $60; permits $900; restoration $300. Assumptions: tough ground, longer runs.
Assumptions: region, specs, labor hours.
Pricing FAQ
What is the typical cost per foot for underground power lines The range is commonly $20 to $70 per ft for combined materials and labor, with higher costs for difficult soil, urban restoration, or higher service capacity. Permits and inspections can add a fixed amount on top of per-foot pricing.