The cost to trench an electric line is typically $5-$12 per foot for a straightforward trench, or about $10-$25 per foot when basic conduit and installation are included. Soil conditions, trench depth, cable requirements, access, and local labor rates can shift the quote substantially.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Trenching only | $5/ft | $8/ft | $15/ft | Normal soil and accessible route |
| Trench with conduit and installation | $10/ft | $17/ft | $30/ft | Excludes major electrical-panel work |
| Short project total | $500 | $1,500 | $4,000 | About 50-150 feet; site conditions vary |
| Rocky or difficult excavation | $15/ft | $25/ft | $40+/ft | May require specialized equipment |
What homeowners pay for a 100-foot electric trench
A 100-foot trench in accessible, ordinary soil commonly costs $500-$1,200 for excavation alone. Adding conduit, placing a suitable underground cable, backfilling, and basic labor can bring the trench portion of the project to roughly $1,000-$2,500. The final bill can be higher if the work includes a new circuit, panel changes, inspections, or surface restoration.
For a typical open-yard route, budgeting about $10-$25 per foot for trenching plus basic underground installation is a reasonable starting point. Quotes should clarify whether the price includes conduit, warning tape, backfill, compacting, and electrical connections.
Assumptions: U.S. suburban property, standard access, ordinary soil, and a straightforward route; regional rates and electrical scope vary.
How excavation, conduit, and labor shape the quote
Contractors may quote excavation separately from electrical materials and connections. The table gives broad installed-task ranges; overlapping items can be bundled, so they should not simply be added without checking the quote.
| Quote item | Typical price | What it may include | Common cost driver |
|---|---|---|---|
| Machine trenching | $5-$12/ft | Excavating a clear route | Depth, soil, access |
| Hand digging | $10-$30/ft | Digging around obstacles | Roots, utilities, tight access |
| Conduit and fittings | $1-$5/ft | Basic PVC conduit and connectors | Diameter and schedule |
| Electrical labor | $75-$150/hour | Pulling wire and making connections | Circuit and crew size |
| Backfill and restoration | $2-$10/ft | Refilling and rough grading | Soil disposal and surface type |
Ask for excavation, electrical work, and restoration as separate quote lines. That makes it easier to identify exclusions and compare contractors’ per-foot rates.
Why depth, conduit size, and soil change the price
Required burial depth depends on the wiring method, circuit, location, and applicable electrical code. A route needing 24 inches of cover can take more time and excavation than one permitted at a shallower depth; the electrician should confirm the requirement rather than rely on a general per-foot estimate.
Conduit diameter also affects material cost and installation effort. A basic residential run may use 1-inch conduit, while larger conductors or multiple circuits can require 1¼-inch or larger conduit. Rocky ground, buried roots, and wet soil can raise excavation rates to $15-$40 or more per foot. Digging near existing utilities may require slower hand work.
Depth and obstacles often matter more than the straight-line distance between the power source and destination. A route that crosses a driveway or retaining wall can cost much more than the same length through open lawn.
How long does a 100-foot trench take to install?
With machine access and ordinary soil, a small crew may excavate a 100-foot route in about 2-5 hours. Hand digging, utility conflicts, or difficult ground can extend excavation to a full day or longer. Conduit placement, wire pulling, connections, inspection coordination, and cleanup may add several hours or require a separate visit.
Electricians commonly charge $75-$150 per hour, with higher rates in expensive metro areas or for specialized work. Some contractors set a minimum service charge of $150-$400, which can make a short trench comparatively expensive.
Short runs often have a higher effective per-foot price because mobilization and setup costs are spread over fewer feet. Confirm whether the contractor uses a minimum charge, hourly billing, or a fixed project price.
How regional labor and access affect trenching rates
Local labor markets, equipment availability, and permitting practices influence estimates. In high-cost coastal metros, quotes may run roughly 15%-35% above a typical suburban rate. Rural projects can be 10%-25% lower when access is easy, but remote travel, limited contractors, or difficult terrain may erase that difference.
Urban yards can add expense when machines cannot reach the route or crews must work around paving and landscaping. Before comparing bids, check that contractors are pricing the same trench length, depth, conduit, cable work, and restoration.
A regional per-foot rate is only useful when the quoted scope and site access match. Request the expected total as well as the rate per foot, especially for a route with a fixed mobilization fee.
What driveway crossings and yard repairs add
Trenching across a lawn is generally less costly than cutting and restoring concrete, asphalt, or decorative paving. A driveway bore or other trenchless method may cost about $20-$50 per foot, depending on distance, soil, and access, but it can avoid a large surface cut. Concrete or asphalt removal and repair can add several hundred dollars to several thousand, depending on area and finish.
Utility locating, permit fees, disposal of unsuitable soil, and inspection requirements may also appear separately. Local permit charges can range from about $50-$500 or more, while complex utility or roadway work may involve additional approvals.
Get a written price for each crossing and surface repair before approving the trench route. “Backfill included” does not necessarily mean lawn reseeding, concrete replacement, or finished landscaping is included.
When a shorter route or simpler conduit saves money
Reducing the route by 20 feet can save roughly $200-$500 when trenching and basic installation are priced at $10-$25 per foot. A qualified electrician can assess whether a shorter path is code-compliant and practical, including clearances from utilities and structures.
Standard conduit and an appropriately sized circuit may cost less than oversized materials or extra capacity that the project does not need. However, wire size, conduit, burial method, and circuit protection must match the electrical load and code requirements. Choosing materials solely by the lowest price can lead to replacement work.
Control the route and scope, but leave electrical sizing and code decisions to a licensed professional. Providing clear access and moving outdoor furniture or planters before the crew arrives may also reduce avoidable labor.
How to compare quotes for the same underground run
Request at least two or three written estimates and give each contractor the same route length and destination. Ask whether the price includes trenching, conduit, wire, connections, backfill, compaction, permits, utility locating, inspections, and restoration. Verify who will coordinate required inspections and whether the work is performed by a licensed electrician.
For a simple 100-foot lawn route, a quote near $1,000-$2,500 for trenching and basic underground installation may be plausible, while a rocky route or driveway crossing can exceed that range. A low bid may exclude cable, electrical-panel work, or finished surface repairs.
Compare the included work and exclusions, not just the advertised price per foot. A detailed estimate helps reveal whether a higher quote reflects real site requirements or simply a broader scope.