Your well guy just delivered two very different numbers. A few thousand dollars to go deeper into the same hole, or thirty thousand dollars and up to start over with a brand new well. Which one actually fits your property?
Whether you deepen the well or drill a new one is one of the biggest financial decisions a rural homeowner in the Wenatchee Valley will face, and guessing wrong wastes money in both directions. Pay for deepening on a well with bad casing and you throw money at a fix that can’t hold. Pay for a brand new well when your existing casing could have carried a deeper bore, and you’ve spent tens of thousands you didn’t need to spend.
We’re Wenatchee Well Pros, and we get pulled into this decision constantly across Chelan, Douglas, and Grant counties, usually because a driller already gave a homeowner a scary quote and they want a second opinion before signing anything. This guide walks through how the choice actually gets made, what it costs either way in 2026, and real cases we’ve worked from Cashmere to Moses Lake.
If your well is showing trouble right now and you’re not sure which direction to go, call us at (509) 300-5151 before you sign anything with a drilling company. We test what you’ve already got first.
Deepen the Well or Drill a New One: What Each Option Actually Means
Deepening means a drill rig re-enters your existing bore and continues down, extending the same hole further into the aquifer. Your current casing usually stays in place for the upper section, with new casing or open bore extending below it. It’s faster than starting fresh because the top of the hole is already drilled, developed, and connected to your property.
Drilling a new well means exactly what it sounds like. A fresh bore somewhere else on your property, all new casing top to bottom, a new well seal, a new pump system, and new trenching to the house. The old well usually gets decommissioned once the new one is proven, which is its own cost and its own paperwork.
Neither option is a DIY project or even a judgment call to make alone. Both require a licensed well driller to evaluate the existing bore, and the pump and wiring work on either path is a job for a licensed well contractor, not a homeowner with a rented auger. Get a professional evaluation before you spend a dollar on either direction.
Can Your Well Be Deepened? The Casing Test That Decides It
Whether deepening is even possible comes down to one question: is the existing casing sound enough for a rig to work through it safely?
Steel casing that’s decades old can be corroded, especially in mineral-heavy groundwater common from Cashmere to Quincy. A driller will typically run a camera or caliper survey down the casing first, checking for pitting, cracks, or collapse before committing to deepen. If the casing shows significant corrosion, deepening becomes risky or impossible, and a new bore is the safer call.
Depth and formation matter too. A well that’s already 300 feet deep in soft alluvial ground may not have much usable aquifer left below it before hitting bedrock, while a basalt well in Douglas County might have hundreds of feet of fractured rock still untapped. Your driller can pull nearby well logs to get a sense of what’s actually down there before committing to either path.
Age plays a role as well. Wells drilled before Washington tightened casing standards decades ago sometimes used thinner steel or lacked a proper surface seal, both of which make deepening a poor bet even if the casing looks fine on camera. If your well is older than 25 to 30 years, budget for a full camera inspection before you decide anything.
Cost Comparison: Deepening vs. Drilling a New Well
Here’s how the two paths compare on price across our service area in 2026.
| Factor | Deepen Existing Well | Drill New Well |
|---|---|---|
| Typical cost | $8,000 - $20,000 | $18,000 - $50,000+ |
| Time to complete | 1-3 days | 3-7 days plus permitting lead time |
| Casing requirement | Existing casing must pass inspection | All new casing, no prior condition risk |
| Permitting | Notice of intent, often simpler | Full notice of intent, may need siting review |
| Pump system | Often reusable if depth change is modest | Always new pump, wire, and drop pipe |
| Decommissioning cost | None | May apply to old well, $2,500 - $6,000 |
Deepening generally runs 40 to 60 percent of what a comparable new well costs, mostly because you’re not paying for casing and development on the upper section a second time. That discount only holds if the casing inspection comes back clean. A failed inspection midway through a deepening attempt can leave you paying for both the failed attempt and a new well afterward.
Our full breakdown of 2026 well drilling costs in Washington covers per-foot pricing and what drives new-well costs up in basalt country, worth a read regardless of which direction you’re leaning.
When Deepening Makes Sense
Deepening is the right move most often when a well’s yield has dropped gradually rather than failed suddenly, the casing is in good shape, and there’s known aquifer left below the current bore depth.
Tom Reyes, whose property sits on the bench above Wenatchee, watched his well’s afternoon pressure fade every August for three years running. A camera inspection showed his older steel casing was in solid shape with no significant pitting. His driller deepened the bore another 80 feet into a lower basalt fracture zone for $11,400, and Tom’s well hasn’t sputtered since, even through last year’s dry summer.
Curt Anderson runs an orchard outside Chelan and was staring down a driller’s quote for a brand new 450-foot well at $34,000. Before signing, he called us for a second opinion on his existing pump, and we suggested he get the casing checked first. It passed clean, and his driller deepened the existing 280-foot well to 400 feet for $14,200, tapping into the same fracture zone his neighbor’s newer well was already producing from.
Deepening also tends to make sense when your existing wellhead location, easements, and setbacks from septic and property lines already work. Moving to a brand new well location sometimes runs into the same setback problems that made the original site the only option in the first place. If the new depth means your existing pump can’t keep up anymore, our well pump replacement service can size and install a unit built for the new setup, typically $1,800 to $4,500 installed, same week.
Not sure if your well’s slowdown is even a depth problem in the first place? A lot of what looks like a dying aquifer is actually a tired pump. Our guide to wells running dry in North Central Washington walks through the look-alike problems, including a worn pump, that get mistaken for a failing aquifer constantly.
When You Need a New Well Instead
Sometimes the casing test settles it fast, and sometimes it’s the site itself that rules out deepening.
Denise Whitfield, near Moses Lake, had a well that had been sputtering for two summers. A camera survey found her older casing had corroded through in two spots below 60 feet, with visible daylight where groundwater was seeping in around the outside of the pipe. Deepening through compromised casing like that risks a collapse mid-job, so her driller recommended a new well instead. It ran $27,800 for a 320-foot bore in decent ground, plus $3,800 to properly decommission the old well per state requirements.
A new well also becomes the only real option when a well has gone completely dry rather than just low-yield, when the aquifer at the current depth is fully tapped out with nothing deeper worth reaching, or when the existing well sits in a location that’s since been compromised by a new septic system, a building addition, or a nearby contamination concern.
If you’re facing a new-well decision because your water quality has gotten worse rather than your quantity, get it tested first. Water testing runs $150 to $400 for a proper lab panel, and sometimes the fix is treatment, not a new hole in the ground.
Whichever direction your situation points, don’t let a driller’s quote be the only opinion you get. Request a free estimate and we’ll look at the pump and system side of the equation before you commit to either path.
Permits and Paperwork Either Way
Both deepening and drilling a brand new well require a Notice of Intent filed with the Washington Department of Ecology before work starts, and both fall under the same groundwater permit-exemption rules most single homes rely on. The Department of Ecology’s well construction program covers the filing requirements and keeps public well logs you or your driller can pull before deciding anything.
Deepening paperwork is usually lighter since the well already exists and its location is already approved. A brand new well may trigger a fresh look at septic setbacks, property line distances, and in some closed basins, additional review before permit-exempt status applies.
Either way, once work is done, get the well tested. The Washington Department of Health recommends a full bacteria and nitrate panel any time a well is deepened or newly drilled, since disturbing the bore can temporarily introduce contaminants that clear with a proper flush and test.
What to Do Before You Sign Anything
Before you commit to either path, get three things in hand: a casing inspection, a current yield test, and a second opinion on whether your pump and pressure system are actually the problem.
A yield and drawdown test tells you what your well can sustain today, which matters whether you deepen or start fresh. If your existing casing has never been scoped and it’s more than 25 years old, ask for that inspection before any other decision gets made. And if nobody has actually confirmed your pump is healthy, that’s worth ruling out before you spend five figures on the well itself.
We see this backwards more often than you’d think: homeowners pricing a new well when a worn pump or a corroded casing coupling near the surface was the real issue all along. A diagnostic visit to test your pump and pressure system typically runs $150 to $250, and our well pump repair team in Wenatchee can rule that piece out in an afternoon. If your casing has surface corrosion but the deeper sections test sound, sometimes a well casing repair solves the whole problem for a fraction of either drilling option.
If you’re staring down a drilling quote and want someone to look at the whole picture first, not just sell you a new hole, call (509) 300-5151. We’ll tell you honestly which way your specific well points.
Frequently Asked Questions
Is it cheaper to deepen a well or drill a new one?
Deepening typically runs 40 to 60 percent of a comparable new well, generally $8,000 to $20,000 versus $18,000 to $50,000 or more for a full new bore. The catch is that deepening only works if the existing casing passes inspection. A well with corroded or compromised casing usually isn’t a candidate no matter how much cheaper it looks on paper.
How do I know if my well can be deepened?
A licensed driller runs a camera or caliper survey down the existing casing to check for corrosion, pitting, or structural damage before recommending deepening. Wells with sound casing and known aquifer depth below the current bore are usually good candidates. Wells older than 25 to 30 years should get this inspection regardless of symptoms, since casing condition matters more than age alone.
Do I need a new pump if I deepen my well?
Sometimes, but not always. If the deepening only adds a modest amount of depth, your existing submersible pump may still handle it once the drop pipe is extended. If the new depth changes the pump’s performance needs significantly, or the pump was already near the end of its life, plan on a new pump as part of the project.
Can a well be deepened more than once?
Yes, as long as the casing keeps passing inspection and there’s usable aquifer left to reach. Some older wells in our area have been deepened twice over several decades. Each round still requires its own Notice of Intent and casing evaluation, so treat every deepening decision as a fresh one rather than assuming a well that qualified once will always qualify again.