Underground power lines to a house typically cost $2,000-$10,000 for a straightforward residential installation, with an average near $5,500. Distance from the utility connection, trenching conditions, electrical capacity, local utility charges, and whether an existing overhead service must be removed can substantially change the price.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Complete residential installation | $2,000 | $5,500 | $10,000 | Typical short-to-moderate run with ordinary access |
| Underground trenching | $5 per linear ft | $12 per linear ft | $30 per linear ft | Higher for rock, paving, or difficult access |
| Electrician and service work | $800 | $2,000 | $4,000 | Service equipment, conduit, wiring, and connections |
| Utility contribution or connection | $0 | $1,500 | $5,000+ | Depends on utility rules, distance, and required equipment |
Assumptions: U.S. residential property, standard 200-amp service, roughly 50-100 feet of underground route, and no major rock excavation or road crossing.
Underground service line prices by residential distance
For a typical home, a short 25- to 50-foot route may cost $1,500-$4,000 when utility fees are modest and the yard is easy to excavate. A 50- to 100-foot run often totals $3,000-$8,000. A 100- to 200-foot route can reach $6,000-$15,000 or more, particularly if the utility must extend its distribution line or install a transformer.
A practical planning range is $30-$100 per route foot for the complete project, not just the trench. The lower end usually means a simple private-side installation with limited utility work. The higher end may include longer cable, larger conduit, service-panel changes, restoration, and utility engineering. Per-foot comparisons are useful only when quotes cover the same work.
These estimates generally describe a new underground connection from a nearby utility point to the house. Converting an existing overhead service can cost more if the meter, service panel, mast, or utility attachment needs replacement. For a long rural driveway, the electric utility may price its line extension separately from the homeowner’s electrician and trenching costs.
What utility, electrician, and trenching charges cover
Quotes often combine separate jobs performed by the electric utility, a licensed electrical contractor, and an excavation crew. The utility may set the connection point, provide or pull conductors, install a transformer, and schedule disconnection. The electrician typically handles conduit, meter equipment, grounding, service conductors, and inspection coordination. Excavation costs cover digging, bedding, backfill, and sometimes surface repair.
| Quote component | Typical price | What it may include | Cost note |
|---|---|---|---|
| Trenching and backfill | $5-$30 per linear ft | Open trench, bedding, backfill, basic grading | Rock or paved surfaces can exceed $40 per ft |
| Conduit and conductors | $8-$25 per linear ft | Approved conduit, wire, fittings, pull materials | Wire size and amp capacity affect price |
| Electrician labor | $75-$150 per hour | Service connections, meter work, grounding | Often 8-24 hours across the project |
| Utility work | $0-$5,000+ | Connection, line extension, transformer work | Utility tariff and scope determine charge |
| Permits and inspection | $100-$800 | Electrical permit and required inspections | Local fees vary |
| Restoration and disposal | $200-$2,000 | Sod, gravel, pavement, debris removal | Landscaping and pavement raise expense |
Ask for the utility charge, trenching, electrical work, and restoration as separate quote lines. That makes it easier to see whether the quoted total includes utility coordination, inspection corrections, and final surface repair. Some utilities do not allow a private contractor to perform work on utility-owned equipment.
Labor can be estimated with . At $90-$140 per hour, 10-18 electrician hours represent $900-$2,520 before materials, permits, or utility charges. Excavation may be billed by the foot, by the day, or as a minimum mobilization fee.
How distance, 200-amp service, and soil affect the quote
Route length is one of the clearest price drivers: each added foot can require more trenching, conduit, and conductor. A straight 60-foot route through lawn is usually less expensive than a 60-foot route that crosses a driveway, retaining wall, or mature landscaping. A route that must detour around trees or other underground utilities also increases labor and material quantities.
Service capacity matters because 200-amp service generally needs larger conductors and compatible equipment than a smaller service. Upgrading from 100 amps to 200 amps can add approximately $500-$2,500, depending on the panel, meter base, wire size, and utility requirements. A 320- or 400-amp service may add $1,500-$5,000 or more for larger equipment and conductors.
Ask the contractor to specify route length, conductor size, conduit type, and service amperage. Without those details, a low bid may reflect a smaller service or exclude portions of the route. Local electrical code and utility specifications determine burial depth and approved materials; these are not safe places to cut corners.
Soil and surface conditions can shift excavation costs sharply. Ordinary soil and open lawn commonly fall near $5-$15 per foot for trenching. Dense clay, tree roots, or limited machine access may raise that to $15-$30 per foot. Rock excavation can exceed $30-$60 per foot. Cutting and restoring concrete or asphalt may add $10-$40 per square foot, depending on thickness and finish.
Who pays when the utility owns part of the line
Payment responsibility depends on the utility’s service rules and the location of its equipment. The utility commonly owns and maintains distribution equipment and may own conductors up to a defined service point. The homeowner often pays for customer-owned conduit, trenching on private property, meter equipment, and the wiring from the service point to the house. Boundaries differ, so a utility’s written work order is more dependable than a general rule.
Request a site visit and written utility scope before hiring an excavation crew. The utility can identify its connection point, required trench route, acceptable conduit, and any charges for a line extension or transformer. A utility may provide an allowance or cover some work, but that depends on local tariff rules and project conditions.
Permits and inspections may be required for service upgrades, new meter equipment, or trench work. Budget around $100-$800 for typical local permits and inspection fees, but confirm with the building department. Some jurisdictions require inspection before backfill; covering an uninspected trench can lead to costly reopening. If the project crosses a public right-of-way, additional permits, traffic controls, or restoration standards may apply.
How long the crew needs to trench and connect power
A straightforward 50- to 100-foot installation may take one day for excavation and another day for electrical connections, with the utility’s schedule adding separate waiting time. A small crew can often dig an accessible lawn route in 4-8 hours. Rock, hand digging, pavement, multiple bends, or a long cable pull can extend excavation to 1-3 days.
Electrician time commonly totals 8-24 hours for a basic service installation, though a panel replacement or capacity upgrade can require more. Electrician rates often run $75-$150 per hour, and excavation crews may charge $100-$250 per hour or $500-$1,500 per day, depending on equipment and location. Confirm whether the estimate includes equipment mobilization, minimum labor charges, and utility coordination.
Power may need to be shut off during the changeover. The utility and electrician must coordinate the disconnection, inspection, and reconnection, so completion may take longer than the physical work. A missed inspection or delayed utility appointment can leave an open trench or require a second crew visit. Ask who is responsible for scheduling each step.
How regional labor rates change underground line pricing
Prices vary with local wages, excavation conditions, utility policies, and contractor availability. A standard installation in a lower-cost rural market may land 10%-20% below the national planning range when the utility connection is nearby. Large metro areas and high-cost coastal markets can run 15%-35% above comparable national estimates because labor, permits, and restoration are more expensive.
Compare local bids by matching the route, service size, and utility scope rather than comparing totals alone. Rural sites can still cost more when a home is far from existing distribution lines: a utility extension may add several thousand dollars, and a new transformer or long-distance work can push the project above $15,000. Urban sites can face higher costs for pavement cuts, traffic control, and access constraints.
Season and weather can affect scheduling and excavation rates. Frozen ground, heavy rain, or saturated soil may delay work or require specialized equipment. Busy construction periods can also limit crew availability. Scheduling during a contractor’s less-busy period may help avoid rush charges, but utility appointments and permit requirements still control the project timeline.
Three residential quotes show how scope changes the total
A 40-foot route from an existing nearby connection, 200-amp service, open lawn, and no panel replacement might cost $2,200-$4,000. The estimate could include $400-$800 for trenching, $700-$1,300 for conduit and wire, $800-$1,400 in electrician labor, and $300-$500 in permits and utility charges. The low price assumes simple access and minimal restoration.
A 90-foot installation with a 200-amp service, moderate landscaping, and a standard meter change might total $4,500-$8,000. For example, 90 feet of trenching at $12-$22 per foot is $1,080-$1,980; electrical materials may be $1,000-$2,000; labor may be $1,200-$2,500; and utility, permit, and restoration costs may add $1,200-$1,800.
A 180-foot rural route requiring a utility line extension, 320-amp equipment, and partial rock excavation could reach $12,000-$25,000 or more. Trenching might run $4,000-$8,000, electrical materials and service equipment $3,000-$6,000, labor $2,000-$4,000, and utility engineering or extension work $3,000-$7,000. Actual utility charges require a site-specific estimate.
These examples are budgeting scenarios, not fixed national rates. A useful quote should state the measured route, whether the connection is utility-owned or customer-owned, and whether restoration and inspection are included. If the contractor has not surveyed the route, treat the price as preliminary.
Lower the bill by controlling route, restoration, and upgrades
A shorter route can reduce trenching and conductor expense, but the final path must meet utility clearance and electrical-code requirements. Ask the utility and electrician to approve the route before excavation. Avoiding a driveway crossing or preserving existing landscaping may save hundreds to several thousand dollars, depending on the surface and restoration required.
Keep the project scope limited to required work and compare fully itemized bids. If the existing panel and meter equipment meet current requirements, replacing them unnecessarily can add $1,000-$4,000. Conversely, equipment that is unsafe, undersized, or rejected by the utility may need replacement to complete the service conversion.
Homeowners may be able to handle light preparation, such as moving stored items or clearing access, if the contractor approves it. They should not dig near marked utilities or install unapproved conduit. Call 811 before any excavation; the locating service marks public underground utilities, while private lines may require a separate locator. Confirm that the contractor has included utility marking, required trench inspection, backfill, and cleanup.
Compare at least two or three quotes with matching assumptions: route length, 200-amp or larger capacity, conductor and conduit specifications, utility fees, permit charges, and surface restoration. Ask whether rock, unexpected buried obstructions, or additional utility work triggers a change order. A modest contingency of 10%-15% is reasonable when the route has not been excavated and soil conditions are uncertain.