California well drilling cost

Cost to Drill a Well in California

Water wells in California average about 229 feet deep across the 1,050,979 records in our database. At typical U.S. drilling rates, that puts the drilling and casing at roughly $5,900 to $8,800, before the pump, tank, treatment, and permits that complete a working system. Here is how the numbers break down, and the real California data behind them.

Reviewed byDrillerDB Editorial TeamLast updated July 9, 2026

Avg depth: 229 ft
Well records: 1,050,979
U.S. $/ft: $21-42

Typical U.S. well drilling rates by depth

These are national average residential rates for the drilling and casing, not California-specific prices. Rates fall into depth bands, with a setup (mobilization) fee on top. Use them as a yardstick, then get local quotes.

Well depth	Drilling + casing (per ft)	Setup fee
Up to 100 ft	$28 - $42	$400 - $600
101-300 ft	$24 - $36	$400 - $600
301-600 ft	$25 - $30	$750 - $800
601 ft and deeper	$21	$1,000

National residential rate model, drilling and casing only. Higher per-foot rates apply to larger casing and hard-rock drilling. Pump, pressure tank, treatment, and permits are separate (see below).

What California well records actually show

Cost follows depth, so the most useful California number we have is the real one: our database holds 1,050,979 water-well records across California, with completed wells averaging about 229 feet deep. The typical static water level - how far down the water table sits - runs about 82 feet across 217,001 recorded readings. These are real construction records you can review before you hire.

Well records

1,050,979

Avg depth

229 ft

Water table

~82 ft

Check your address depth Explore California well records

What that means for a typical California well

Illustrative drilling + casing at 229 ft

$5,900 - $8,800

This applies the national residential rate ($24 to $36 per foot at this depth) to California's real average well depth of 229 feet. It is an illustration built from a national rate card and California's recorded average depth - not a quote, and not a price observed in California. Your actual cost depends on your site's depth, geology, and casing, plus the pump, tank, treatment, and permits covered below.

One more thing quotes can't promise: depth. Nobody knows exactly how deep the water is until the drill finds it, so drillers quote a per-foot rate against an estimated depth - and if your well has to go deeper to reach a reliable aquifer, the extra footage bills at that same rate. That is normal practice, not a sign of a dishonest driller. Budget a 15-25% depth contingency above any estimate, and plan for the deeper half of your local range rather than the shallowest case.

Beyond the hole: the complete water system

The drilled hole and casing are only part of the bill. A working well also needs a pump and pressure tank, wiring and a pitless adapter, a sanitary cap and grouting, water testing, and often treatment for hardness, iron, or bacteria. Add it up and a complete private well system commonly runs $15,000-$45,000 for California, based on our state cost research, versus $5,000-$15,000 nationwide. The low end is a shallow well with simple equipment; the high end is a deep well with treatment and difficult access. A typical California project takes 2-4 months from planning to usable water.

What drives the cost of a well in California

Depth
The biggest lever. California wells average about 229 feet, but deeper aquifers mean more feet at the per-foot rate.
Geology and casing
Hard rock drills slower and can push per-foot rates toward the high end. Loose or caving formations need more casing, which adds material cost.
Water table and yield
The water table around California sits near 82 feet in our records, but wells are drilled well past it to reach a dependable, year-round supply.
Pump, tank, and treatment
The pump, pressure tank, and any treatment for hardness, iron, or bacteria are a large share of a complete system - often several thousand dollars.
Permits and testing
California: County Environmental Health. Permit, inspection, and water-test fees are usually modest but affect the timeline.
Site access
A rig needs room to work. Tight lots, long driveways, steep grade, or remote sites raise mobilization and labor.

Well drilling cost FAQ for California

There is no single California price - cost tracks depth, geology, and casing. As a starting point, water wells in California average about 229 feet deep in our records, and at typical U.S. residential drilling rates that works out to roughly $5,900 to $8,800 for the drilling and casing alone. A complete water system (pump, pressure tank, treatment, permits) commonly runs $5,000-$15,000 nationwide. Get written quotes from at least two licensed California drillers for a real number.

Typical U.S. residential rates run about $21 to $42 per foot for drilling and casing, with the lower end on shallow, small-casing wells and the higher end on shallow large-casing or hard-rock work. Most drillers also charge a setup or mobilization fee of a few hundred dollars. These are national averages, not California-specific prices - your driller's rate depends on local rock and rig.

Across the 1,050,979 California well records in DrillerDB, completed wells average about 229 feet deep. Depth is the single biggest cost lever: because drilling is priced largely per foot, a well twice as deep costs roughly twice as much to drill. Your site's actual depth depends on where the local aquifer sits, so a local driller reading nearby records is the best guide.

Permitting in California: County Environmental Health (DWR Bulletin 74). Permit and inspection fees are usually a small part of the total, but they affect the timeline. A licensed California contractor typically pulls the permit and folds it into the quote.

The drilled hole and casing are only part of it. A working system also needs a pump and pressure tank, wiring and a pitless adapter, a well cap and grouting, water testing, and often treatment for hardness, iron, or bacteria. Those add several thousand dollars on top of the drilling, which is why a complete private well system commonly runs $5,000-$15,000.

More California well resources

California Well Drillers

Browse licensed, insured drilling and pump contractors serving California and request quotes.

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Water Table Depth

Free tool: enter any California address to see the likely water table and typical well depth from real nearby wells.

Look up depth

California Well Owner Guide

Costs, permits, timeline, water quality, and maintenance for private wells in California.

Open guide