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How this calculator works
A well quote is three separate things bundled, and this separates them.
- Drilling is priced per foot, and the rate rises with how hard the ground is to cut.
- Casing and grouting is also per foot, but of a different length — soft ground needs casing most of the way down, while hard rock often holds its own walls and needs it only through the overburden.
- The pump, tank and wiring is a fixed-ish package on top. A drilled hole is not a water supply.
Notice that the two per-foot rates move in opposite directions. Rock costs more to drill and less to case. That is why a "cheaper ground condition" does not always produce a cheaper well, and why comparing two quotes on the drilling rate alone will mislead you.
What the inputs mean
Expected depth
Nobody knows this before drilling. Ask your driller what depth wells in your immediate area are finishing at — that is the only useful number, and they will have it.
Ground conditions
Rock is slower to drill and drives the per-foot rate up, but it often needs less casing, which pulls back the other way.
Include pump and pressure tank
A drilled hole is not a water supply. Quotes that look cheap often stop at the hole.
What this estimate does not include
- The water line and electrical run from the well head to the house
- Water testing and any treatment the results call for
- A second attempt if the first hole comes up dry
The clause to look for before you sign
What happens if the well goes deeper than quoted, and what happens if it comes up dry? Both are ordinary outcomes and both should be written into the contract rather than discovered afterwards. Ask what depth nearby wells are finishing at — a driller who works the area will know, and that figure is worth more than any calculator.
If you have a well already and the problem is pressure rather than water, the pump is the usual culprit — see how to tell a failing pump from a failing well.
What comes next?
Land preparation runs in a sequence. Getting the order wrong is the most expensive mistake on a raw lot — grading before the septic is sited means paying to move the same dirt twice.