Irrigation Well Drilling: Costs, Permits & What to Expect (2026)

An irrigation well is designed to deliver large volumes of water for agriculture, landscaping, or lawn irrigation — far more than a standard residential drinking water well. If you’re drilling a well specifically for irrigation, the equipment, permits, and costs are different from a household well.

This guide covers what irrigation wells cost, how they differ from residential wells, where permits get complicated, and how to decide if one makes financial sense for your property.

Irrigation Well Costs at a Glance

Cost Factor	Range
Small irrigation well (lawn/garden, 1–5 acres)	$5,000–$12,000
Medium irrigation well (small farm, 5–20 acres)	$10,000–$25,000
Large agricultural well (20+ acres, center pivot)	$25,000–$75,000+
Drilling cost per foot	$30–$75
Larger diameter casing (6–12”)	$15–$40/ft additional vs. 4”
Irrigation pump	$2,000–$15,000

Irrigation wells cost more than residential wells primarily because of larger diameter casing (to handle higher flow rates) and larger, more powerful pumps.

How Irrigation Wells Differ from Residential Wells

The core difference is flow rate. A residential well supplying a household needs 5–10 gallons per minute (GPM). An irrigation well may need 50–500+ GPM depending on acreage and crop type.

Specification	Residential Well	Irrigation Well
Flow rate needed	5–10 GPM	50–500+ GPM
Casing diameter	4–6 inches	6–12 inches
Pump type	Submersible (1–2 HP)	Submersible or turbine (5–75+ HP)
Pump cost	$1,000–$3,500	$2,000–$15,000
Electricity cost	$15–$40/month	$100–$1,000+/month during season
Permit complexity	Simple (domestic use exempt in many states)	More complex (water rights, allocation limits)
Water quality testing	Required for drinking water standards	Less stringent (non-potable use)

Casing Diameter Matters

The single biggest cost difference between irrigation and residential wells is casing size. A 4-inch residential casing allows a standard submersible pump. An irrigation well typically needs 6–12 inch casing to accommodate a larger pump and handle higher flow rates.

Larger casing requires a larger drill bit, more drilling fluid, more grout, and a bigger rig — adding $15–$40 per foot to drilling costs compared to a standard residential well.

Pump Sizing

Irrigation pumps are sized based on GPM needed and total dynamic head (the vertical distance the water must travel plus friction losses). A 5-acre lawn irrigation system might need a 5 HP pump ($2,000–$4,000). A 100-acre center pivot system might need a 50+ HP turbine pump ($8,000–$15,000+) with three-phase electrical service.

Electricity costs during irrigation season can be substantial — $100–$1,000+ per month depending on pump size and hours of operation.

Cost Breakdown by Use Case

Lawn and Garden Irrigation (Under 2 Acres)

Total cost: $5,000–$12,000

For homeowners who want a dedicated irrigation well to water a large lawn, garden, or landscape beds without using (and paying for) municipal water. This is one of the most common irrigation well projects.

Well depth: 50–300 feet (depends on local water table)
Casing: 4–6 inch (a standard residential-size well often works)
Pump: 1–3 HP submersible ($1,000–$3,000)
Flow rate needed: 10–30 GPM
Connection: Direct to irrigation system (sprinklers, drip lines)

At this scale, the well is often identical to a residential drinking water well. The main savings come from not needing water quality treatment — the water goes straight to sprinklers.

Payback period: If you’re currently paying $100–$300/month for municipal water for irrigation, a $8,000 well pays for itself in 3–6 years.

Small Farm Irrigation (2–20 Acres)

Total cost: $10,000–$25,000

For hobby farms, orchards, nurseries, and small-scale agriculture. Flow rates of 50–150 GPM are typical.

Well depth: 100–500 feet
Casing: 6–8 inch
Pump: 5–15 HP submersible ($3,000–$7,000)
Flow rate needed: 50–150 GPM
Connection: Header pipe to drip irrigation, sprinklers, or micro-sprinklers

At this scale, you’ll likely need a permit even in states that exempt domestic wells. Budget for a hydrogeologist consult ($500–$2,000) to confirm the aquifer can sustain the withdrawal rate you need.

Large Agricultural Irrigation (20+ Acres)

Total cost: $25,000–$75,000+

For commercial farms running center pivot, flood, or large-scale drip irrigation. These are major infrastructure projects.

Well depth: 100–1,000+ feet
Casing: 8–12+ inch
Pump: 25–75+ HP turbine or submersible ($8,000–$15,000+)
Flow rate needed: 200–1,000+ GPM
Connection: Mainline pipe to center pivot or distribution system
Electrical: May require three-phase power installation ($5,000–$15,000)

Large ag wells are typically engineered projects. You’ll need a hydrogeologist, a well driller experienced with high-capacity wells, and potentially an irrigation system designer.

Permits for Irrigation Wells

This is where irrigation wells get more complicated than residential wells. Most states exempt small domestic wells from permitting requirements, but irrigation wells often exceed the thresholds that trigger permits, water rights reviews, and allocation limits.

States Where Permits Are Straightforward

Some states handle irrigation well permits through a simple registration or permit application:

Texas — No statewide permit for most wells; Groundwater Conservation Districts regulate withdrawals in their jurisdictions
Florida — Consumptive Use Permit required for wells over 100,000 GPD from the regional Water Management District
Nebraska — Well registration required; some Natural Resources Districts restrict new irrigation wells in fully allocated areas

States Where It Gets Complicated

Massachusetts — Water Management Act permit required for withdrawals over 100,000 gallons per day. Smaller irrigation wells may still need local Board of Health approval. The process can take months.
California — Varies by county and basin; some groundwater basins under SGMA (Sustainable Groundwater Management Act) restrict new irrigation wells
Colorado — Prior appropriation water rights system; you may need a water court decree for an irrigation well, which can take a year or more
Arizona — Active Management Areas (Phoenix, Tucson) have strict groundwater regulations; irrigation wells outside AMAs are less regulated

General Rule

Always check with your state’s water resources agency and local county before drilling an irrigation well. The permits for a 500 GPM agricultural well are nothing like the permits for a 10 GPM household well. Start the permit process early — in some states, approval takes 3–6 months.

Irrigation Well vs. Municipal Water: The Math

If you’re a homeowner considering an irrigation well to avoid paying for municipal water, here’s how to run the numbers:

Step 1: Calculate your current irrigation water cost

Check your water bill during peak irrigation months (June–September). Subtract your winter baseline (indoor use only). The difference is your irrigation cost. Many homeowners spend $100–$400/month watering a lawn during summer.

Step 2: Estimate your annual irrigation water cost

Multiply your monthly irrigation cost by the number of irrigation months in your area (typically 4–7 months). Example: $200/month × 6 months = $1,200/year.

Step 3: Compare to well cost

A lawn irrigation well costs $5,000–$12,000. Ongoing costs (electricity, maintenance) run $200–$500/year. If your annual municipal irrigation bill is $1,200 and a well costs $8,000 with $300/year in operating costs:

Annual savings: $1,200 − $300 = $900/year
Payback period: $8,000 ÷ $900 = ~9 years

If your municipal water rates are high (common in the Northeast and West Coast) or you irrigate a large property, payback can be as short as 3–4 years. If your water is cheap and your lawn is small, a well may never pay for itself.

Can You Use One Well for Both Drinking Water and Irrigation?

Yes, but with limitations. A single well can supply your household and your irrigation system if:

The flow rate is sufficient — your well must produce enough GPM to handle simultaneous household use and irrigation demand
The pump is properly sized — undersized pumps will lose pressure when both systems run
You have a pressure tank large enough to buffer demand spikes

For small properties (under 2 acres of irrigation), a single well often works. For larger irrigation needs, a dedicated irrigation well is usually the better approach — it protects your household water supply from running short during heavy irrigation and allows you to size each system independently.

How to Save on Irrigation Well Costs

Get 3+ quotes — Request free estimates from licensed drillers. Prices vary widely.
Check neighbor wells — Nearby wells tell you the likely depth to water, which is your biggest cost variable
Right-size the well — Don’t overbuild. A 6-inch well with a 10 HP pump is overkill for a 1-acre lawn. Your driller should size the system to your actual irrigation needs.
Consider a shared well — In some rural areas, neighboring properties share an irrigation well and split costs. Check local regulations.
Time your drilling — Late fall and winter are slower seasons for most drillers, and you may get better pricing or shorter wait times.
Explore cost-share programs — USDA EQIP and other conservation programs offer cost-sharing for agricultural irrigation wells that improve water efficiency. Check with your local NRCS office.

Frequently Asked Questions

How deep does an irrigation well need to be? The same depth as any other well in your area — deep enough to reach a productive aquifer. The difference is the diameter and pump, not the depth. Check our state cost guides for typical depths in your area.

Do I need a separate meter for an irrigation well? No — private wells don’t have water meters (that’s one of the benefits). However, some states require a flow meter on high-capacity irrigation wells to track withdrawals.

Can I drill an irrigation well myself? For a shallow, small-diameter well (under 50 feet in sandy soil), possibly. For anything deeper or requiring a large-diameter casing, you need a licensed driller with a truck-mounted rig. Most states require a licensed driller for any well over 25 feet.

How long does an irrigation well last? With proper maintenance, 25–50+ years for the well itself. Pumps typically last 10–15 years before needing replacement ($2,000–$8,000 depending on size).

What about well water quality for irrigation? Irrigation water doesn’t need to meet drinking water standards, but extremely high salinity, iron, or pH can damage plants and clog drip emitters. A basic irrigation water test ($50–$150) is worth the cost before you plant.

Get an Irrigation Well Quote

Irrigation well costs depend heavily on your specific situation — acreage, water table depth, flow rate needed, and local regulations. The best way to get an accurate price is to talk to licensed drillers who work in your area.

Get 3 free quotes from licensed well drilling contractors, or browse our contractor directory to find drillers near you who specialize in irrigation wells.