Septic & Well Installation Estimate Software (2026)

Septic and well installations are permit-heavy, soil-dependent projects where the wrong estimate can cost you the entire margin. Septic and well estimate software accounts for soil conditions, tank sizing, and permit requirements before you commit to a number.

What septic and well contractors need in estimate software

• System sizing — based on bedroom count and perc test results
• Tank specification — single vs. multi-compartment, concrete vs. poly, gallons
• Leach field — conventional trench, chamber, drip irrigation; soil type determines design
• Well specifications — estimated depth, casing diameter, pump size (HP and GPM)
• Permits and inspections — state health department + county permits required

Septic & well pricing quick reference (2026)

• Conventional septic system (3-bedroom, new) — $8,000–$20,000
• Advanced treatment system (mound, drip) — $15,000–$40,000
• Septic tank replacement only — $3,000–$7,000
• Perc test + design (engineering) — $1,500–$3,500
• Well drilling (per foot) — $40–$80
• Well pump and pressure system — $1,500–$3,500 installed
• Well + septic combo (new construction) — $20,000–$50,000

How to estimate a septic or well project

1. Confirm perc test results or arrange test — required before any design
2. Size septic tank based on bedroom count (typically 1,000–1,500 gallon minimum)
3. Calculate leach field based on perc rate and square footage of absorption area needed
4. For wells: estimate depth from neighboring wells or geologic survey
5. Add permits, inspections, and engineer's stamp if required by jurisdiction

Septic and well estimating pitfalls

• Not including perc test cost in initial proposal — surprised clients blame you for delays
• Estimating well depth without geological data — every 50 feet variance = $2,000–$4,000
• Forgetting property setback requirements — tank must be 10+ feet from property lines in most states

The ConstruMate septic and well calculator structures tank sizing, leach field, well depth, and permit costs into a professional proposal that shows clients exactly what they're getting and why.

Start your free septic estimate →