Free cost calculators · Independent local pros
Drain field sizing, costs and local installers
Use our state-specific size calculator, compare costs by field type, and connect with vetted local contractors
- Replacement typically $3,000–$15,000 (avg $7,900, HomeGuide)
- Mound, drip and aerobic systems $10,000–$20,000+
- Free quotes from licensed local installers
Drain Field Pros is a free referral service, not a contractor. Independent local pros quote and do the work.
Typical national cost$3,000 – $15,000Cost guide →- 6 countieswith local pages
- 1 free toolsno sign-up needed
- 2 cost guidesevery figure sourced
- Free to useno obligation, no markup
What's Going On?
Pick the closest match. Each one takes you to the page that handles it, with the request form ready.
Start With a Free Estimate
Know the number before you call anyone. Free calculators and checkers built on published industry data — no sign-up.
What Is DrainFieldPros?
DrainFieldPros.com is a homeowner research site published by Cornelia Cove LLC. We answer one expensive question: what will it take to fix or replace my drain field? Owners use our state-specific Drain Field Size Calculator, cost guides and county pages built from health-department fee schedules, state sizing rules and USDA soil data.
We connect homeowners with independent local licensed contractors — we don't install anything ourselves. Each request reaches the contractor with the project details the homeowner entered: county, home size, soil information if they have it, the field type they're considering, and the calculator's size estimate.
Services
Drain Field Replacement
A failed drain field usually requires a new field on fresh soil, sized to current code. Connect with local licensed installers for site evaluation and quotes.
Learn more →Drain Field Repair & Rejuvenation
Many slow or soggy drain fields can be repaired for $1,000–$5,000 when the problem is a broken pipe, a failed D-box, or clogged laterals rather than worn-out soil.
Learn more →Perc Test & Site Evaluation
A perc or soil test tells the designer how fast your soil accepts effluent, which sets field size and type. Expect $600–$2,000.
Learn more →Aerobic (ATU) Spray & Drip Field Installation
Where soil is too tight, shallow or wet for a conventional field, the answer is usually an ATU that discharges to a spray field or drip lines. $10,000–$20,000+.
Learn more →Cost Guides & Emergency Help
Real price ranges with sources, and step-by-step first moves for the problems that can't wait.
Drain Field Care, By the Book
EPA's septic care basics. A drain field lasts 20–25 years on average (HomeGuide), and these habits help it get there.
Inspect at least every 3 years
Have the system inspected by a septic service professional at least every three years.
Pump every 3 to 5 years
Household tanks are typically pumped every three to five years. Keep a note of when it was last pumped and when it is next due.
Keep vehicles off the field
Don't park or drive on the drain field, and plant trees far enough away that roots stay out of it.
Send rainwater elsewhere
Keep roof drains, sump pumps and other rainwater drainage away from the drain field area.
Why DrainFieldPros?
State-specific sizing
The calculator applies Texas, North Carolina and Florida sizing rules from the actual code tables — not estimates.
Sourced cost data
Every price range cites HomeGuide, Angi, theseptic.guide or HomeAdvisor. No made-up numbers.
Local permit details
County pages list official fees, permit authorities and contact numbers — straight from health department sites.
How It Works
- Step 1
Size your field
Enter your state, bedrooms, home size and soil class. The calculator returns the area and trench length your code requires.
- Step 2
Compare costs
See published price ranges for conventional, chamber, mound, drip and aerobic fields, plus permits and soil tests.
- Step 3
Request quotes
Submit your details and connect with a licensed local installer who serves your county.
Counties We Serve
Local pages with service-area notes, common jobs, and pricing context for each county we cover.
Frequently Asked Questions
How much does it cost to replace a drain field?
Typically $3,000–$15,000, with an average around $7,900 (HomeGuide, Dec 2025). Mound and aerobic systems run $10,000–$20,000 or more. The cost-guide page breaks it down by field type.
How do I know what size field I need?
Use the Drain Field Size Calculator. It applies Texas, North Carolina or Florida sizing rules based on your bedrooms, home size and soil class.
How long does a drain field last?
HomeGuide says 20 to 25 years; Angi says about 20 on average. EPA advises inspecting the system every three years and pumping typically every three to five years. Overloading with water, grease or wipes shortens field life.
How do I know if my drain field is failing?
Slow drains and gurgling throughout the house, sewage odor in the yard, soggy ground over the field when it hasn't rained, or green stripes of grass over the trenches. A full tank or a clogged pipe can look the same, so have the tank pumped and inspected first. Our failure-signs guide walks through it.
Do I need a permit to replace a drain field?
Yes, in every county we cover. Permit fees range from $50 (Lake County FL repair) to $710 (aerobic systems in McLennan and Bell counties, TX). See your county page for the exact fees.
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