A new well in Williamson County, TX typically costs about $15,400 to $34,100 in 2026 for a complete system, because the median new household well filed with the state since 2016 is 550 feet deep. A shallower well near 470 feet runs about $13,200 to $29,100.
Williamson County, around Georgetown, Liberty Hill, Leander, Florence, Jarrell, Taylor, and Granger, runs north of Austin along I-35, where many rural homes outside a water supply corporation’s lines rely on a private well. Below are the real local depths from state well records, the water-quality issues to plan for, the permit rules, and a free way to reach a licensed local driller.
How deep are wells in Williamson County?
Most new household wells in Williamson County are 470 to 700 feet deep, with a median of 550 feet. That comes from 1,272 new domestic wells drillers reported to the state from 2016 through October 2026 in the TWDB Submitted Driller’s Report database.
| Measure (new domestic wells, 2016 to 2026) | Williamson County |
|---|---|
| Wells in the sample | 1,272 |
| Typical depth range (middle half) | 470 to 700 ft |
| Median depth | 550 ft |
| Shallowest 10% / deepest 10% | under 250 ft / over 830 ft |
| Median static water level | 374 ft below ground |
| Median pump setting | 500 ft |
| Median tested yield | 25 gallons per minute |
Static water sits about 374 feet down in a typical Williamson County well, so the pump is usually set around 500 feet to ride out dry summers.
Which aquifer will my Williamson County well tap?
Your well will most likely draw from the Trinity Aquifer in most cases, or the Edwards (Balcones Fault Zone) Aquifer. The TWDB Williamson County water planning summary lists the Trinity, Edwards, and Carrizo-Wilcox among the county’s groundwater sources.
Williamson County has the deepest median household well in this batch, 550 feet, which makes it the most expensive county here to drill.
How much does it cost to drill a well in Williamson County?
Plan on about $15,400 to $34,100 for a complete well at the 550-foot median depth. Angi’s 2026 guide puts Texas well drilling at $28 to $62 per foot (Angi), and HomeGuide puts a complete installation, including casing, pump, wiring, and permits, at $30 to $80 or more per foot (HomeGuide). These are estimates from national cost guides applied to local depths, not local quotes.
| Well depth | Estimated 2026 cost at $28 to $62/ft |
|---|---|
| Shallow (470 ft) | $13,200 to $29,100 |
| Median (550 ft) | $15,400 to $34,100 |
| Deep (700 ft) | $19,600 to $43,400 |
Budget separately for water treatment. HomeGuide lists well-water filtration systems at $800 to $4,000 and water softeners at $1,200 to $3,800. There is no groundwater district fee in Williamson County today. For how the line items break down, see what it costs to drill a well in Texas. If your pump ever needs replacing, here is Texas well pump replacement cost.
Worked example: a 550-foot well at $40 per foot is $22,000. Drilling only to 470 feet at the same rate would save about $3,200 up front, but only if the shallower zone gives enough good water. Ask the driller what nearby wells at that depth produced before you choose.
What water quality problems are common in Williamson County wells?
TWDB says Trinity Aquifer water is generally fresh but very hard where the aquifer is at or near the surface, and that dissolved solids, sulfate, and chloride tend to rise as the aquifer gets deeper (TWDB).
In the Edwards, TWDB says the water is hard but fresh, under 500 mg/L dissolved solids, but its fast recharge through karst makes it vulnerable to contamination from runoff (TWDB). Test for bacteria as well as minerals.
For reference, the EPA’s secondary (non-health) guidelines are 0.3 mg/L for iron, 250 mg/L for sulfate and chloride, 500 mg/L for dissolved solids, and a pH of 6.5 to 8.5 (EPA). The Texas Well Owner Network guide recommends testing a new well and retesting yearly. If you plan a tankless water heater, read tankless water heaters on well water.
Do I need a permit to drill a well in Williamson County?
Williamson County has no groundwater conservation district, so a household well needs no local groundwater permit, registration, or district fee (TWDB district map). A 2023 petition to annex western Williamson County into Bell County’s Clearwater UWCD was voted down by that district’s board on February 14, 2024 (Community Impact).
Statewide, anyone who drills a water well or installs a well pump must hold a license from the Texas Department of Licensing and Regulation (TDLR), the well must meet TDLR’s minimum distances from septic systems and other contamination sources, and the driller files a State Well Report for every new well. Those reports are the records behind the depth table above. Septic (OSSF) permits are separate; see aerobic vs conventional septic in Texas.
What should I ask a driller before I hire?
- Are you licensed by TDLR as a water well driller and pump installer? (Check the number at the TDLR license search.)
- What depth have your last few wells near my property reached?
- How do you price it: per foot, or a package with casing, pump, tank, and wiring included?
- Which aquifer will you finish in, and what have your recent wells near me tested for sulfate and bacteria?
- Do you file the State Well Report with TDLR, and will I get a copy?
- What happens if the first hole does not produce enough water?
If the well tests low, a storage tank can smooth it out; see storage tanks for low-yield wells. For outages, see sizing a generator for a well pump.
Get matched with a Williamson County well pro
Tell us about your project and we will pass it to a licensed local driller who works in Williamson County. Offsprig is paid by the contractor, never by you.
Related Texas well guides
Common questions
Most complete wells in Williamson County should land around $15,400 to $34,100 in 2026, based on the 550-foot median depth of new domestic wells in state records and Angi’s $28 to $62 per foot Texas range. Treatment and district fees are extra.
The median new household well reported to the state from 2016 to 2026 in Williamson County is 550 feet deep, and the middle half range from 470 to 700 feet. Median static water level is about 374 feet, per the TWDB Submitted Driller’s Report database.
No groundwater permit or district fee is needed for a household well in Williamson County as of October 2026, because the county has no groundwater conservation district. Your TDLR-licensed driller still files a State Well Report, and septic rules still apply.
They are deep. The median new household well filed with the state since 2016 is 550 feet deep, with static water about 374 feet down and pumps set near 500 feet, per TWDB driller reports. Depth drives most of the per-foot cost.
Sources: depth, water level, yield, and pump data are Offsprig’s analysis of the TWDB Submitted Driller’s Report download (pulled October 2026; new wells with proposed use “Domestic,” completed 2016 or later). Water-quality figures come from the TWDB and USGS sources linked above. Costs are estimates from Angi and HomeGuide 2026 per-foot ranges, not quotes. Always confirm current rules with TDLR and your groundwater district.
Updated October 2026 · By Paul Michael