How Much Does Well Drilling Cost?
How much does well drilling cost? The honest answer is that water well drilling cost depends mostly on three things: how deep the drill has to go to reach reliable groundwater, what kind of ground sits between your surface and that aquifer, and how much of the finished system you include in the job. Nobody can hand you a real number without knowing those answers for your property. Around Gresham and the rural edge of Clackamas and Multnomah County, two neighbors a mile apart can get different quotes for the same reason their wells end up at different depths. By the end of this page you will know what drives the price, what a solid estimate looks like, and how to get an accurate number for your own land.
What Drives the Cost of Well Drilling
Most well drilling jobs are priced around a per-foot rate plus the parts of the system that make the water usable. That means the factors below are not fine print. They are the price.
Depth to reliable water
Drillers charge by the foot, so depth is the single biggest cost factor. A well that hits a productive aquifer close to the surface costs a fraction of one that has to keep going. You cannot see your depth from the surface, but you can get close: ask about wells drilled on nearby properties, and look up well logs for your area. Oregon keeps public records of drilled wells, and those logs show how deep neighboring wells went and what the drillers found. If wells around you are shallow, that is a good sign for your budget. If they run deep, plan for the higher end.
The ground between you and the water
Soft soil drills fast. Dense rock drills slow, wears equipment, and sometimes calls for a different drilling method. Around the east Portland metro, the geology shifts as you move from the valley floor toward the foothills near Sandy, Estacada, and Corbett, so ground conditions are a local question, not a regional one. Harder ground pushes the price up two ways: more time per foot, and sometimes more casing to keep the hole stable. The same well logs that tell you about depth also describe what the drill passed through, so use them.
How Water Well Drilling Costs Are Affected by Casing and Well Construction Requirements
Casing is the pipe that lines the drilled hole and keeps the well from collapsing or letting surface water contaminate your groundwater. Oregon has rules about how wells must be constructed and sealed, and those rules exist to protect your water. More casing footage means more material cost. A well that needs a deeper surface seal or extra casing to get through unstable ground will cost more than one where the rock holds its own shape. This is not a corner worth cutting; a poorly sealed well can turn into a contamination problem that costs far more to fix.
The pump system
Drilling the hole gets you access to water. The pump system gets water to your house. A submersible well pump, the wiring to run it, a pressure tank, and the piping from the wellhead to your home are all separate line items, and deeper wells need stronger pumps. Some quotes cover drilling only; others cover the complete working system, including well pump installation. The scope of what is included varies dramatically between quotes because of the work involved. Always confirm whether the pump system is included before you compare numbers.
Site access and distance to the house
The drill rig is a large truck. If it can park near the well site, setup is simple. If your site is up a steep, soft, or tight driveway, expect added time and cost. Distance matters after drilling too: a wellhead far from the house means a longer trench, more pipe, and more wire. Walk your property and think about where a rig could reasonably work. If the answer is obvious, this factor probably works in your favor.
Water testing and permitting
New wells need permits, and you will want the water tested before anyone drinks it. Well water testing checks for bacteria, nitrates, and other common concerns, and lenders often require it if the property is changing hands. These are smaller costs than the drilling itself, but they belong in your budget, not as a surprise at the end.
Cost Factor Table
| Factor | Pushes the price down when… | Pushes it up when… |
|---|---|---|
| Depth to water | Nearby well logs show shallow, productive wells | Neighboring wells run deep or hit dry zones first |
| Ground conditions | The drill moves through soft soil or stable formations | Dense rock slows drilling or forces a method change |
| Casing needs | The formation holds its shape with standard casing | Unstable ground or sealing rules require extra casing |
| Pump system | You only need the drilled and cased well for now | You want a complete system with pump, tank, and piping |
| Site access | The rig can park close to the well site on firm ground | Access is steep, soft, tight, or far from the house |
| Testing and permits | Standard permit and a basic water test cover it | Extra testing or site conditions add requirements |
How to Get an Accurate Well Drilling Estimate
A phone call with three pieces of information gets you a much better number than any generic figure online. Have these ready:
- Your property location and lot layout. The driller can pull well logs from nearby properties and make an informed depth estimate before anyone shows up.
- What you need the well to do. A household well for one home is a different job than a well serving irrigation, livestock, or a commercial property.
- Whether you need the full system. Drilling only, or drilling plus pump, pressure tank, and the line to the house.
A good quote spells out the per-foot drilling rate, the casing rate, what happens if the well has to go deeper than estimated, and exactly which parts of the pump system are included. It should also cover the permit and a plan for water testing. If a quote is a single number with no breakdown, ask for the breakdown. You are not being difficult; you are making the quotes comparable.
Estimates differ between providers for real reasons: different equipment suited to different ground, different assumptions about depth, and different scopes. The cheapest number on paper sometimes excludes the pump system entirely. Compare what each estimate includes before you compare the totals.
Ways to Keep the Cost Down
There is no coupon for geology, but you do control several real levers.
- Do your homework on nearby wells first. Free public well logs tell you the likely depth range before you ever request a quote. That knowledge keeps estimates honest and helps you spot a number that assumes too much or too little.
- Get two or three itemized quotes. Not to grind the lowest bidder, but to see where the estimates agree and where they diverge. Agreement on depth and casing means the estimates are grounded in the same local reality.
- Pick the well site with the driller, not before. A site the rig can reach easily, at a sensible distance from the house, trims access costs and trenching without changing the water you get.
- Size the pump for what you actually need. An oversized pump costs more to buy and run. A pump matched to your household and your well's real output costs less now and lasts longer.
- Maintain the well you pay for. A periodic well inspection and prompt well pump repair when something sounds off are cheap compared to replacing a pump that ran itself to death, or worse, drilling again because a neglected well failed.
Cost Questions People Ask
How much does well pump replacement cost?
It depends on the pump type, the depth it sits at, and what failed. A submersible well pump replacement in a deep well costs more than swapping a shallow jet pump, because pulling a pump from depth takes more labor and the pump itself works harder. Sometimes the pump is fine and the real problem is a pressure switch, a bad wire, or the pressure tank; those are smaller repairs. A proper diagnosis before replacement keeps you from paying for a pump you did not need.
Is there a water well drilling cost calculator I can trust?
Be careful with online calculators. Most plug in generic per-foot numbers that have nothing to do with the ground under Gresham, Boring, or Damascus, and the result can be off in either direction. The closest thing to a real calculator is a local driller who has drilled near your property and can pair your location with actual well logs. That estimate reflects your geology, not a spreadsheet's.
Does a deeper well always mean better water?
No. Depth is about reaching a reliable aquifer, not about quality for its own sake. Some properties hit good water at modest depth; others have to drill past dry or low-yield zones to find it. What you want is a well deep enough to produce steadily through dry summers, cased and sealed correctly, with the water tested before you drink it.
Should I repair my old well or drill a new one?
Start with an inspection. Many "failed well" calls turn out to be pump and well repair jobs: a worn pump, a broken pipe, or an electrical fault, all far cheaper than drilling. A new well makes sense when the old one no longer produces enough water, was constructed poorly, or has a contamination problem that sealing cannot fix. An honest assessment of the well and the aquifer it draws from tells you which side of that line you are on.
The Bottom Line
Your water well drilling price comes down to depth, ground conditions, and how much of the system you include, and all three are knowable before anyone drills. Pull the well logs for your area, then get two or three itemized quotes from a local well drilling company that works your ground. When the estimates agree on depth and scope, you have a number you can actually budget around.
If you need well drilling, Clackamas Well Drilling can help.
Prefer to talk it through? Call (503) 782-5215 — a quick call is usually the fastest way to get a straight answer for your situation.