Drilling a residential water well typically costs between $3,000 and $9,000, with most homeowners paying around $5,500. That range covers the drilling itself, but your final bill depends on depth, geology, location, and the equipment needed to get water from the ground into your house. When you factor in pumps, pressure tanks, electrical work, water testing, and permits, a complete well system can run anywhere from $1,800 on the low end to $24,500 or more for deep wells in difficult terrain.
What Drives the Drilling Cost
The single biggest variable is how deep the driller has to go. Most residential wells are priced per foot of depth, and that per-foot rate depends on what the drill has to cut through. Soft soils and sand drill quickly and cheaply. Hard rock like granite takes longer, wears out equipment faster, and costs more. In areas with a shallow water table (under 100 feet), your drilling bill alone might be $1,500 to $3,000. In regions where groundwater sits 300 or 400 feet down, drilling alone can exceed $10,000.
Geography matters in another way too. If the drill rig can’t easily access your property, or if the well site is far from your house, expect higher costs for mobilizing equipment and running longer supply lines. Rural lots with steep grades or dense tree cover sometimes need site preparation before the rig can even set up.
Pumps and Pressure Tanks
Once the hole is drilled and cased, you need a pump to push water to the surface and a pressure tank to store it and maintain steady flow in your house. These are separate line items that add significantly to the total.
A submersible well pump, the type that sits deep inside the well, costs around $1,900 including installation. The price varies with depth: a pump for a 100-foot well is far less expensive than one rated for 400 feet, because deeper pumps need more power and more durable construction.
Pressure tanks range from about $100 for a basic single-compartment model to $2,500 for a large, all-metal tank. Most homes use a diaphragm-style tank that runs $200 to $500 for a standard size. Tanks are sized by the gallon, typically 20 to 120 gallons, at roughly $10 to $15 per gallon of capacity. A plumber charges $125 to $200 per hour for installation labor.
Electrical and Trenching
Your well pump needs electricity, and your house needs a water line from the wellhead. Both require trenching, which costs $5 to $12 per linear foot depending on soil conditions and depth. If your well sits 100 feet from the house, that’s $500 to $1,200 just for the trench.
Installing underground electrical conduit runs $6 to $13.50 per foot, covering both the wiring and the PVC conduit that protects it. Running a new water line from the well to your home typically costs $30 to $50 per linear foot, or $800 to $2,000 total for an average distance. These costs are sometimes bundled into the driller’s quote and sometimes billed separately by an electrician or plumber, so ask upfront what’s included.
Permits and Inspections
Nearly every jurisdiction requires a permit before you can drill. Fees vary widely by state and county. A non-potable well permit (for irrigation, for example) can be as low as $300, while a potable drinking water well permit may run $1,000 or more. Some states also require a licensed geologist or hydrogeologist survey before issuing a permit, which adds to the cost. Your drilling contractor usually handles the permit application, but the fee is passed on to you.
Many areas also require a post-drilling inspection to verify casing depth, grout sealing, and setback distances from septic systems or property lines. Inspection fees are often included in the permit cost, but not always.
Water Testing
Before you drink from a new well, you need lab testing to confirm the water is safe. A basic bacteria test checking for coliform and E. coli costs about $35. A lead test runs around $36. If you’re buying or selling a home with a well, lenders typically require a more comprehensive panel: the standard FHA/VA loan package covering bacteria, lead, and nitrates costs roughly $142.
For a thorough picture of your water quality, a full homeowner testing package that screens for bacteria, nitrates, metals, volatile organic chemicals, fluoride, and pesticide residues costs around $430. You might also want radon-in-water testing (about $100) if you’re in a region with known radon risk. Testing is not a one-time expense either. Annual bacteria and nitrate checks are recommended for as long as you use the well.
Water Treatment Systems
Well water often needs some treatment before it’s ideal for household use. Hard water, iron staining, low pH, or trace contaminants are common issues that your water test will reveal. The type of system you need depends entirely on what’s in your water.
A standard ion-exchange water softener, the most common choice for hard well water, costs $500 to $3,000 installed. Salt-free alternatives run $800 to $4,000. If your water has more serious contamination, a whole-home reverse osmosis system costs $4,000 to $11,000. Simpler point-of-use reverse osmosis units for a single faucet are much cheaper, typically $1,500 to $1,800. Labor for installation ranges from $150 for a basic hookup to several thousand dollars for complex whole-home systems.
Not every well needs treatment beyond basic disinfection, but budgeting $1,000 to $2,000 for some form of filtration or softening is realistic for most areas.
When the Well Doesn’t Produce Enough Water
Sometimes a newly drilled well doesn’t yield enough water for household needs, especially in rocky terrain with limited fractures. The most common fix is hydrofracking, where water is pumped into the well under high pressure to crack the surrounding rock and open new pathways for groundwater. This procedure costs $4,000 to $7,000 and may only last a few years before yield drops again, depending on the geology.
The alternative is drilling deeper or drilling a second well entirely, both of which can double your original investment. Low yield is one of the financial risks of well ownership that’s hard to predict before drilling begins. A good driller familiar with local geology can reduce this risk, but never eliminate it.
Total Cost Breakdown
Here’s what a complete well installation looks like when you add up all the pieces:
- Drilling and casing: $3,000 to $9,000 (the core cost, depth-dependent)
- Submersible pump: ~$1,900
- Pressure tank: $200 to $2,500
- Trenching and water line: $800 to $2,000
- Electrical conduit: $600 to $1,350 (for 100 feet)
- Permits: $300 to $1,100
- Water testing: $35 to $430
- Water treatment: $500 to $4,000
For a straightforward installation with moderate depth and no complications, expect a total project cost of $7,000 to $12,000. Deep wells, rocky soil, long distances from the house, or water quality issues that require extensive treatment can push the total well past $20,000. On the other end, a shallow well in sandy soil with a short run to the house and clean water might come in under $5,000, though that’s increasingly uncommon.