Drilling cost per foot ranges from about $10 to more than $100, depending on whether the project is a water well, geothermal bore, or smaller test hole. Depth, rock conditions, site access, casing, and local labor rates can change the total substantially.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Water well drilling | $25 per ft | $45 per ft | $100+ per ft | Drilling only; casing and pump may cost extra |
| Geothermal bore | $15 per ft | $25 per ft | $40 per ft | Common vertical-loop drilling range |
| Test or soil bore | $10 per ft | $30 per ft | $75+ per ft | Price depends on diameter, sampling, and access |
| Residential well project | $3,000 | $7,500 | $20,000+ | Often includes drilling plus some well components |
What homeowners pay for water well drilling
For a residential water well, drilling commonly costs $25-$65 per foot in straightforward ground, with difficult rock or remote sites reaching $100 or more per foot. A 150-foot bore at $40 per foot represents $6,000 for drilling before casing, pump, electrical work, and water testing. A complete installed well often totals $5,000-$15,000, while deep wells or complex sites can exceed $20,000.
Geothermal drilling is usually quoted per bore foot, often around $15-$40, but contractors may price the full loop field as part of a heating and cooling installation. Test holes and geotechnical borings have different diameters, sampling requirements, and reporting needs, so their per-foot rates should not be directly compared with a water well quote.
Assumptions: U.S. residential project, standard access, ordinary casing needs, and no unusual permitting or environmental requirements.
How casing, labor, and equipment shape the quote
Per-foot drilling rates do not always cover the complete job. Ask whether the written estimate includes casing, grout, mobilization, well development, pump installation, and disposal. A low drilling rate can produce a higher final bill when essential well components are listed separately.
| Quote item | Typical price | What changes it | Often included |
|---|---|---|---|
| Drilling labor and rig | $25-$65 per ft | Ground, diameter, depth | Usually the core drilling charge |
| Casing and screen | $10-$40 per ft | Material, diameter, length | May be separate |
| Mobilization | $300-$1,500 | Distance and rig size | Not always included |
| Pump and installation | $1,000-$4,000 | Well depth, flow, electrical needs | Usually separate |
| Testing and permits | $100-$800 | Local rules and test scope | Often separate |
Depth and rock hardness move the per-foot rate
Depth affects both drilling time and the amount of casing, pipe, and labor required. A 100-foot well may be priced differently from a 300-foot well even if both have the same diameter. Once a water well passes roughly 200 feet, added depth can raise material and pumping costs as well as drilling charges.
Geology is equally important. Soft soil and sediment are generally quicker to drill than dense granite, fractured bedrock, or formations that keep collapsing. Contractors may charge more when the bore exceeds 8 inches in diameter, requires additional casing, or encounters unstable layers. Narrow access that prevents a full-size rig from reaching the site can add several hundred dollars or more.
Can a detailed drilling scope lower the final price
Keep the requested bore diameter and depth tied to the actual well or engineering design rather than adding capacity without a reason. For water wells, a driller can discuss nearby well records and likely depth, but no estimate can guarantee where water will be found. Confirm the price for extra depth before work starts, including any minimum charge or stop-work procedure.
Compare at least three local, itemized quotes using the same depth assumptions, casing material, and included services. Ask whether the per-foot rate changes at depth thresholds and whether the contractor bills for dry holes. Clearing the rig route and arranging access ahead of time can avoid delays or a smaller, more expensive rig. Do not remove required casing or testing merely to reduce the bid.
Regional drilling rates vary with geology and travel
Quotes in remote areas may be 10%-25% higher than nearby metro rates when a driller must travel farther or mobilize specialized equipment. Rocky parts of the Northeast and Mountain West can cost 15%-40% more than favorable sediment conditions, while some areas with established well-drilling competition may have lower labor charges. These are broad comparisons, not fixed regional price lists.
Local ground conditions usually matter more than a state average. Ask contractors about comparable wells within a few miles, including their depth and casing requirements. A site visit can reveal slope, overhead clearance, soil stability, and access issues that an online estimate cannot capture.
How many hours does a drilling crew need
A straightforward residential well may take one to three days of drilling, though mobilization, casing, development, and pump installation can extend the project. A geothermal bore field with multiple holes typically requires several days or longer, depending on the number and depth of bores. Longer rig time can increase labor, equipment, and standby charges.
For labor estimates, a crew’s effective rate may run about $75-$150 per hour when labor and equipment are considered together. Many firms quote by the foot or by the project instead. Ask how weather delays, waiting for utility markings, and equipment downtime are billed.
Three sample quotes show how scope changes totals
| Project | Calculation | Estimated total | Scope |
|---|---|---|---|
| Shallow water well | 100 ft × $35, plus $2,000 components | $5,500 | Easy access, basic casing and pump |
| Rocky residential well | 200 ft × $65, plus $3,500 components | $16,500 | Hard rock, added casing and pump work |
| Geothermal bore field | 600 total ft × $25 | $15,000 | Drilling only, loop installation excluded |
These examples are planning estimates, not guaranteed bids. Confirm whether taxes, permits, testing, casing, grout, and cleanup are included before comparing totals.
Removal, permits, and dry holes add separate charges
Depending on the project, site preparation, utility locating, water testing, and permit fees may add $100-$1,000 or more. An abandoned or unsuccessful bore can still incur the full drilling charge, plus $500-$2,000 for proper sealing in some cases. Ask who handles permit applications and whether disposal of drilling cuttings or excess water is included.
Get dry-hole, cancellation, and restoration terms in writing. Local regulations may set requirements for casing, sanitary seals, setbacks, or well abandonment, and noncompliance can lead to extra work. For geothermal projects, confirm whether loop pipe, grout, trenching, and connection to the building are in the drilling quote or billed separately.