"How long does it take?" has two answers: how long the rig is drilling, and how long until you have safe running water in the house. The first is often short. The second involves several steps and people, and it is the one that matters for a move-in date or a construction schedule.
How long does the drilling itself take?
The National Ground Water Association says drilling a well can take hours or days, depending on how deep it needs to be and the geology. NGWA Well Owner's Guide (2021) Hard rock, loose ground that needs extra casing, or water found deeper than expected all add time. A dry first hole can mean a second attempt. [NGWA-GUIDE source note]
What is the full well drilling timeline?
| Stage | What happens | What can stretch it |
|---|---|---|
| Quotes and contract | Site visits, written itemized offers, signing | Contractor availability, comparing several bids |
| Permits or notices | Filing with the state or local authority where required | Review periods, required notice before work |
| Scheduling | Waiting for the rig | Season, backlog, weather, site access |
| Drilling and casing | Boring the hole, setting casing, sealing | Depth, geology, dry hole |
| Development and yield test | Clearing fines, measuring flow, drawdown and recovery | Test length required locally |
| Pump and water line | Installing the pump, wiring, pressure tank, trenching | Separate installer or electrician schedules |
| Disinfection and water test | Disinfecting the system, lab analysis | Lab turnaround, retesting if a result fails |
Some states require advance notice before construction. Washington's 2008 fee guide, for example, required notice at least 72 hours before construction. Washington Ecology: FAQ about Well Drilling Fees (2008) Requirements vary; see water well drilling licenses and permits. [WA-ECY-FEES source note]
Why does testing take time?
A yield test needs to run long enough to show how the well behaves under pumping. Requirements vary by state and town from about one hour to 24 hours, and Connecticut's code minimum for a new well is four hours. Connecticut DPH: Private Well Guidance for Determining Well Safe Yield (2009) See well pump tests for what the test should show. [CT-SAFEYIELD source note]
Before drinking the water, test it. The CDC recommends testing for total coliform bacteria, nitrates, total dissolved solids and pH, and also after any part of the well system is replaced or repaired. CDC: Guidelines for Testing Well Water [CDC-TEST source note]
What happens on drilling day
On the day the rig arrives, the crew sets up over the marked spot, drills, and logs the material at each depth. When the target zone is reached, casing is set and the space around it is sealed, and in loose formations a screen is installed. The well is then developed, by pumping or surging, to clear drilling fines, and its yield is tested. The driller records all of this in the well report filed with the state. NGWA lists rotary, cable tool, down-the-hole and reverse circulation drilling as common methods for household wells, and the method affects how quickly the hole advances. NGWA Well Owner's Guide (2021) See well drilling methods for how they compare. [NGWA-GUIDE source note]
If the first hole is dry
A dry or weak first hole is the biggest single source of schedule risk. Some states treat an immediate second attempt, made while the rig is still on site, differently from a new project, so ask in advance whether a second location could be drilled on the same visit and what it would cost. The first hole must still be properly sealed. See what happens if a new well has no water.
Timeline for a new home build
If the well serves a house under construction, sequence it early. Some guidance recommends not building until you know the site has adequate water, which may mean drilling and testing the well first. Montana DNRC well-owner guide (revised 2007) Coordinate the well location with the septic design, driveway and building footprint so setbacks are met and the rig can reach the site before construction blocks access. See where to drill a well on your property. [MT-DNRC source note]
How long does it take to put in a well from start to finish?
- Ask each contractor for a start date and their typical time from start to working water.
- Ask who installs the pump and the water line, and when.
- Find out what notice or permit your authority requires, and how long it takes.
- Leave slack for lab results and a possible retest.
- Put the anticipated start date in the contract; NGWA's contract guidelines include it. NGWA: Guidelines for Written Contracts
For the full sequence in more detail, read the water well drilling guide.
Common questions
How long does a well driller take on site?
Rig time is often a matter of hours to a few days for a household well, but deep wells, hard rock, loose ground that needs extra casing, or a dry first attempt can extend it.
What usually causes delays?
Contractor availability, permits or required notice periods, weather and site access, unexpected geology, and waiting for lab results. A second attempt after a dry hole also adds time.
Can I use the water the day the well is finished?
Not for drinking until the well has been disinfected and a certified lab has tested the water. Ask your contractor and local health department what tests to run first.
How far in advance should I book a driller?
Ask contractors when they can start; many have waiting lists, especially in busy seasons. Getting several written quotes also takes time, so start early if you have a building deadline.
How long does it take to drill a 300-foot well?
There's no fixed figure: rig time depends on the geology, the drilling method and how much casing is needed. Many household wells are drilled in hours to a few days. Ask the driller for an estimate based on what nearby wells encountered.
Does the season affect how long it takes to put in a well?
It can. Contractor backlogs, wet ground that limits rig access, and frozen ground for trenching can all add time. Ask each driller about their current schedule and how weather affects work on your site.
Sources & claim context
Citations mark where guidance is grounded. They are general resources dated on retrieval, not guarantees for any property, project, price, licensure, permit or yield. No expert, attorney or reviewer signoff is claimed by this site.
Montana DNRC well-owner guide (revised 2007) · MT-DNRC · accessed 2026-10-10
https://dnrc.mt.gov/_docs/water/waterwelldrillowner.pdf
Historical Montana document; do not nationalize its licensing, bond, permit, yield, pricing or legal clauses; refresh with current local authority
CDC: Guidelines for Testing Well Water · CDC · accessed 2026-10-10
https://www.cdc.gov/drinking-water/safety/guidelines-for-testing-well-water.html
General guidance; local health departments may recommend more tests
NGWA Well Owner's Guide (2021) · NGWA · accessed 2026-10-10
https://wellowner.org/wp-content/uploads/2021/04/2021-WellOwners-Guide.pdf
2021 publication; example setback figures are illustrative, local code governs
NGWA (Wellowner.org): Guidelines for Written Contracts · NGWA · accessed 2026-10-10
https://wellowner.org/basics/planning-for-a-water-well/guidelines-for-written-contracts/
Does not prescribe who pays for a dry hole
Connecticut DPH: Private Well Guidance for Determining Well Safe Yield (2009) · Connecticut Department of Public Health · accessed 2026-10-10
Connecticut example; 2009 publication
Washington Ecology: FAQ about Well Drilling Fees (2008) · Washington State Department of Ecology · accessed 2026-10-10
https://apps.ecology.wa.gov/publications/documents/981807wr.pdf
Historical Washington fee rules; fees may have changed
Claims are grounded in the dated source notes above; project-specific price, yield, licensure and permit answers require site-specific and local verification.