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How Long Does Well Drilling Take?

The drilling itself is usually the fastest part. Permitting before the rig arrives and water testing after it leaves are where the real timeline hides.

The Short Answer, and What It Leaves Out

According to HomeAdvisor's well drilling cost data, the well drilling itself generally takes one to three days, and installing the pump, electrical lines, and plumbing often brings the total to about a week. That's the figure most homeowners hear, and it's accurate as far as it goes. HomeAdvisor also notes that rocky soil, permitting delays, or extra depth can stretch that timeline out. What it leaves out is everything that has to happen before a contractor can legally start drilling, and everything that has to happen after the rig leaves before you can rely on the water. Both add real time, and both vary far more by location than the drilling itself does.

Before the Rig Arrives: Permitting Lead Time

In most of the country, a permit has to be approved before drilling starts, not applied for after the fact. Because there's no federal well-permitting system, the process and the timeline are set locally, by a state agency, a state health department, or a county health or environmental department, depending on where you live. See our guide to well permits and regulations for how that authority gets assigned state by state.

Montgomery County, Maryland's Department of Permitting Services gives a concrete example of what one jurisdiction's process actually looks like. It states that well permits are "generally issued within two weeks of submission of a complete application package," provided the property qualifies, but that assumes the paperwork moves cleanly: the county also requires electronic plans to be uploaded "within 5 business days of application, or the application will be voided," and any corrections the reviewer flags have to be resolved first. Once drilling is underway, the driller must notify the county at least one business day before work begins, and after construction wraps up, the permit holder has up to 45 days to file a completion report. None of that is a national standard, jurisdictions differ in fees, setbacks, and how fast reviewers move, but it illustrates the kind of multi-step, multi-week process that sits in front of "day one" of drilling in a lot of places. Ask your local permitting office directly how long a complete application currently takes to turn around; it's one of the few timeline questions with a real, checkable answer before you commit to a contractor.

The Drilling Phase Itself

Once the permit is in hand and the rig is on site, HomeAdvisor's one-to-three-day estimate is what most homeowners should expect for the drilling itself, the rig cutting down to the target depth. It's the part of the project that looks most like what people picture when they think of "drilling a well," and, per the figures above, it's usually the shortest phase of the whole project once permitting and testing are counted.

What Makes Drilling Take Longer

Depth. The deeper the well has to go to reach usable groundwater, the more time the rig spends drilling. HomeAdvisor notes that in some areas, groundwater sits 200 to 300 feet below the surface, which adds time on top of shallower jobs elsewhere.

Rock and geology. What the bit has to cut through matters as much as how far down it has to go. HomeAdvisor is direct about this: "Drilling through rocky soil, stone, or bedrock can significantly increase the time it takes to drill a well, adding to the contractor's rates." Hitting unexpected bedrock partway down a job quoted for softer ground is a common reason a one-day job turns into three.

Equipment needs and site access. Harder ground can also mean the crew needs different tooling. HomeAdvisor notes that rock and bedrock conditions may require the contractor to rent heavier equipment to get through the soil, which in practice means lining up that equipment before work can continue. Sites that are hard for a rig to reach at all, distance from a road, steep grades, or soft ground heavy equipment can't cross safely, can add setup time of their own before drilling starts. Ask a prospective contractor whether your site's access looks straightforward; a driller who has worked in your area will usually know before they arrive.

After the Drilling Stops: Development, Pump, and Electrical

Drilling doesn't leave you with a well you can use yet. First the well has to be developed, surged, jetted, or pumped to clear out fine sediment and drilling fluid so the surrounding aquifer flows cleanly into the finished well. (See our step-by-step guide to how well drilling works for what development, casing, and disinfection each involve.) On timing specifically, the EPA's Ground Water Forum guidance on well development states plainly that "experience has shown that development may take from less than an hour to several days, depending on the formation, development procedures, and well characteristics or construction." Harder, tighter, or fine-grained formations generally take longer to develop than loose, permeable ones.

After development, installing the pump, running electrical service to it, and connecting the plumbing is the other big chunk of post-drilling work, the work HomeAdvisor is counting when it says the full project, drilling plus pump, electrical, and plumbing, typically runs about a week. Pump sizing and installation should be handled by a qualified professional rather than rushed, since an undersized or poorly installed pump causes problems long after the crew has left.

Water Testing Turnaround Before You Can Rely on the Well

A newly finished well isn't something you should treat as a safe primary water source until it's been tested, and lab turnaround adds its own time on the back end. Wake County, North Carolina's environmental health department, which runs its own public health lab, states that "bacteria results are usually ready within 48 hours." That's the fastest-turning test and the one most homeowners want first, since coliform bacteria is the baseline check for a new well. Other contaminant panels take considerably longer: the same county guidance notes that tests for inorganics, volatile organic compounds, pesticides, and radiological compounds "can take 2-4 weeks," and recommends people allow "4-5 weeks minimum" for a full water-quality workup once scheduling, sample collection, and lab analysis are all accounted for. Turnaround times and which contaminants get tested for will vary by lab and by state, so treat these as an illustration of realistic ranges, not a promise for your specific well. See our well water testing guide for what the EPA recommends testing a private well for and how often.

Realistic Total Timeline

Stacking the phases above gives a more honest picture than "about a week." A rough, jurisdiction-dependent range looks something like this:

• Permitting lead time: roughly one to several weeks before drilling can legally start, depending on your local permitting office and whether your application is complete the first time.
• Drilling itself: one to three days once the rig is on site, longer if the crew hits rock or has to go deeper than expected.
• Development, pump, and electrical: anywhere from under an hour of development plus a few days of pump and electrical work, up to several days of development on a difficult formation, generally landing the full post-drilling phase in the same "about a week" range HomeAdvisor cites.
• Water testing before you rely on the well: as little as 48 hours for an initial bacteria result, but another 2 to 4 weeks if you're running a fuller contaminant panel.

Add that up and a realistic total, from filing your permit application to having a well with a clean bacteria test in hand, commonly lands somewhere in the range of three to eight weeks for many homeowners, longer where permitting is slow, geology is difficult, or a fuller battery of water tests is warranted. That's a wider window than the "about a week" figure most people hear, because that figure really only describes the drilling-and-hookup portion of the project. Ask any contractor you're considering to walk you through their estimate for each phase separately, permit, drilling, development and pump, and testing, rather than accepting one number for the whole project. See our guide to hiring a licensed well driller for more questions worth asking before you sign, and our cost guide for how these same phases show up in a quote.

Sources: HomeAdvisor, well drilling cost guide; Montgomery County, MD Department of Permitting Services, well permit process; Wake County, NC Environmental Health, well water testing; and the US EPA Ground Water Forum, Monitoring Well Development Guidelines. Permitting timelines and lab turnaround vary significantly by state, county, and lab; the figures above illustrate realistic ranges from specific jurisdictions, not a guarantee for your property. Confirm current timelines with your local permitting office and testing lab.