15 Questions to Ask Before Starting Well and Septic Services [2026]

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Why the Right Questions Save You Thousands

Hiring a well or septic contractor isn't like picking a plumber for a leaky faucet. You're making a decision that affects your property for decades. A poorly installed septic system can contaminate groundwater, fail within 5 years, and cost you $20,000+ to replace. A badly drilled well can run dry, produce water full of iron or bacteria, or violate setback requirements that trigger county enforcement.

The EPA estimates that approximately 20% of U.S. homes — around 26 million households — rely on septic systems (EPA, 2023). Another 13 million households depend on private wells for drinking water (USGS, 2024). That's a lot of people making high-stakes decisions about contractors, and many of them don't know what to ask.

Here's what to ask. And what the answers should sound like.

Licensing, Insurance, and Credentials

1. "Are you licensed by the state for well drilling and/or septic installation?"

This is non-negotiable. Every state regulates well drilling and septic work differently, but all require some form of licensure or certification. In Texas, well drillers must be licensed through the Texas Department of Licensing and Regulation. In North Carolina, septic installers need certification from the state's Division of Environmental Health.

Ask for the license number. Then verify it. Most states have online lookup tools — it takes 2 minutes. A contractor who hesitates or gets vague about licensing is a contractor you walk away from.

Companies like Carter Services prominently display their licensing credentials and make verification easy. That's the standard you should expect.

2. "Do you carry general liability insurance and workers' compensation?"

General liability protects your property if the crew damages your driveway, hits a utility line, or causes a well blowout. Workers' compensation covers injuries on your property so you don't get sued if a worker falls into a trench.

Request a Certificate of Insurance (COI) with your name listed as additionally insured. Call the insurance company to verify it's current — some contractors let policies lapse and show outdated documents. The National Association of Home Builders reports that uninsured contractor work accounts for roughly $6 billion in unrecovered property damage annually (NAHB, 2024).

3. "Are you bonded?"

Bonding is a financial guarantee. If the contractor abandons a job, does substandard work, or disappears with your deposit, the surety bond pays to make it right. Not all states require bonding for well and septic work, but contractors who carry it voluntarily signal that they're serious about standing behind their work.

Experience and Local Expertise

4. "How long have you been installing wells/septic systems in this county?"

Experience matters, but local experience matters more. A contractor with 20 years in Florida's sandy soils might struggle with the clay-heavy ground in Tennessee. Soil conditions, water table depths, bedrock types, and county regulations vary dramatically — sometimes within the same state.

Look for at least 5 years of work in your specific area. Ask for addresses of recent installations nearby so you can drive by and see the condition of the property. Firms like Jack Shaft & Sons LLC and Hydro Drilling have built reputations specifically through deep local knowledge in the regions they serve.

According to the Census Bureau's Annual Business Survey, the average septic and well services company has been in operation for 14.3 years (Census Bureau, 2024). Companies significantly below that average aren't necessarily bad, but they do warrant extra diligence on references.

5. "What types of systems have you installed, and which do you recommend for my property?"

This question does two things. First, it reveals whether the contractor has experience with the specific system your property might need — conventional gravity-fed septic, aerobic treatment units, mound systems, drip irrigation fields, or engineered chambers. Second, it tells you whether they're recommending based on your property's needs or just pushing the system they're most comfortable installing.

A contractor who only installs one type of system is like a doctor who only prescribes one medication. Your soil type, lot size, water table depth, and local regulations should dictate the recommendation — not the contractor's preference.

For a deeper comparison of system types, our complete guide to well and septic services breaks down every major option.

Pricing, Estimates, and Payment Terms

6. "Can I get a written estimate with itemized costs for labor, materials, permits, and soil testing?"

Verbal quotes are worthless. You need a detailed written estimate that breaks out:

• Labor costs (hourly or flat rate)
• Materials (tank type, pipe materials, pump specifications, well casing)
• Permit fees (county health department, state drilling permits)
• Soil testing and perc tests ($500–$1,500 depending on the area)
• Equipment mobilization (delivery of drill rigs, excavators)
• Site restoration (grading, seeding, driveway repair)

The total should match what you see in our well and septic cost guide. If it's wildly above or below those ranges, ask why.

Red flag: any contractor who quotes a single lump sum without breaking it down. That lump sum hides profit margins you can't negotiate and change orders you can't dispute.

7. "What's your payment schedule, and do you require a deposit?"

Industry standard is 10–30% deposit at signing, progress payments at defined milestones, and final payment upon completion and inspection. Some contractors ask for 50% upfront — that's aggressive but not unheard of for smaller outfits with material costs to cover.

Never pay 100% upfront. Ever. If a contractor demands full payment before breaking ground, that's the biggest red flag in the business.

Also ask: do they accept credit cards? Paying by credit card gives you chargeback protection if the work goes sideways. Contractors who only accept cash or personal checks are harder to hold accountable.

8. "What could cause the final cost to exceed this estimate?"

Good contractors will be upfront about variables. For well drilling, hitting rock at unexpected depths can add $10–$30 per foot. For septic installation, discovering high groundwater or unsuitable soil below the perc test depth can require a redesign. Unexpected utility lines, buried debris, or access issues (narrow driveways, steep grades) all add cost.

What you want to hear: specific scenarios with approximate cost ranges. What you don't want: "Oh, we'll figure it out." A 2025 survey by Angi (formerly Angie's List) found that 34% of homeowners who hired a contractor for septic or well work experienced cost overruns averaging $2,800 — and in most cases, the overruns weren't discussed in advance (Angi, 2025).

Permits, Inspections, and Compliance

9. "Will you handle all permits and coordinate with the county health department?"

This should be a yes. Professional contractors pull their own permits, schedule inspections, and handle the paperwork. If a contractor tells you to get the permits yourself, that's a sign they're either unlicensed (and can't pull permits in their name) or trying to distance themselves from regulatory accountability.

Septic permits typically require:

• Soil evaluation / perc test results
• System design by a licensed professional
• Site plan showing setbacks from wells, property lines, waterways, and structures
• County health department review and approval

Well permits typically require:

• State drilling permit application
• Minimum setback distances from septic systems (usually 50–100 feet)
• Water rights documentation (in western states)
• Completion report filed after drilling

Skipping permits can result in fines, forced removal of the system, or inability to sell the property. The National Environmental Health Association found that unpermitted septic systems are the single most common reason real estate transactions fail in rural areas (NEHA, 2025).

10. "What happens if the system doesn't pass inspection?"

This is a test of character. The right answer: "We fix it at our expense until it passes." The wrong answer: "That's never happened." (It happens to everyone eventually.)

Get it in writing. The contract should specify that the contractor is responsible for bringing the installation into compliance with all applicable codes and passing all required inspections at no additional charge to the homeowner.

Scope of Work and Process

11. "Walk me through the process from day one to final inspection."

A professional contractor should be able to describe every step clearly:

For well drilling:

1. Site evaluation and permit application
2. Drill rig mobilization and setup
3. Drilling to adequate depth and flow rate
4. Well casing and screen installation
5. Grout sealing to prevent contamination
6. Pump and pressure tank installation
7. Water quality testing
8. County inspection and well completion report
9. Site cleanup and restoration

For septic installation:

1. Soil testing and perc test
2. System design and permit approval
3. Excavation
4. Tank placement and leveling
5. Distribution box and drain field installation
6. Piping connections from the house
7. Backfill and compaction
8. County inspection
9. Final grading and site restoration

If a contractor can't explain this sequence — or skips steps like water testing or soil evaluation — move on.

12. "What equipment do you use, and do you own or rent it?"

This sounds technical, but it reveals a lot. Contractors who own their drill rigs and excavators have lower per-job costs and more scheduling flexibility. Contractors who rent equipment pass those costs to you and are at the mercy of rental availability.

For well drilling, ask about the drill rig type. Rotary rigs handle harder rock formations. Cable tool rigs are slower but work well in unconsolidated materials. Ask about camera inspection equipment for existing wells and septic systems — a contractor with a pipe camera can diagnose problems without digging.

For septic work, ask about their vacuum/pump truck for tank pumping, and whether they have laser levels for proper drain field grading. Proper slope in the drain field is critical — even a quarter-inch per foot error can cause pooling and premature failure.

Warranties, Maintenance, and After-Service

13. "What warranty do you offer on labor, materials, and the completed system?"

Warranties vary widely in this industry. Here's what to look for:

Get warranty terms in writing as part of the contract. Ask specifically: does the warranty cover parts only, or parts and labor? A "warranty" that covers a $50 part but charges you $500 in labor to install it isn't much of a warranty.

Also ask: is the warranty transferable? If you sell the property within the warranty period, the new owner should inherit the coverage. This matters for resale value.

14. "Do you offer maintenance plans or service agreements?"

A well-installed system still needs regular maintenance. Septic tanks should be pumped every 3–5 years. Aerobic treatment units need quarterly inspections in most states. Well pumps should be checked annually. Water quality testing should happen at least once a year.

The best contractors offer maintenance agreements that include:

• Scheduled pumping at recommended intervals
• Annual system inspections
• Priority emergency service
• Discounted parts and labor for repairs
• Water quality testing (for well systems)

Maintenance agreements typically run $200–$600 per year depending on your system type and location. It's cheaper than the $8,000–$15,000 you'll spend replacing a drain field that failed because nobody checked the outlet baffle for 10 years.

For more on finding reliable service providers in your area, check our guide on how to find the best well and septic services near you.

15. "What's your response time for emergencies?"

Septic backups, well pump failures, and water contamination events don't wait for business hours. Ask about:

• Emergency availability: 24/7, weekends, holidays?
• Response time: Same day? Within 4 hours? Next business day?
• Emergency rates: After-hours service often carries a premium — know what it is upfront.
• Priority for existing customers: Do maintenance agreement holders get priority?

A contractor who doesn't offer emergency service at all is a contractor you'll be scrambling to replace at 2 AM on a Saturday when your septic backs up into the master bathroom.

References and Reputation

Beyond the 15 core questions, always do your homework on reputation:

Ask for 3–5 references from the last 12 months. Call them. Ask about timeline adherence, communication quality, cleanup, and whether the system is still working properly. Drive by the properties if they're local.

Check online reviews strategically. Google Business Profile, BBB, and Angi are the big three for well and septic contractors. But don't just look at the star rating — read the negative reviews. One-star reviews that mention "didn't pull permits" or "left the yard destroyed" are far more informative than five-star reviews that say "great service."

Verify with your county health department. Ask the department if they've had any complaints or enforcement actions against the contractor. Health departments track permit violations, failed inspections, and consumer complaints — and they'll share this information if you ask.

Check for legal history. A quick search of your state's court records can reveal lawsuits, liens, or judgments. One lawsuit doesn't disqualify a contractor, but a pattern of litigation tells a story.

Red Flags That Should Stop the Conversation

Sometimes the answers to your questions will be fine, but other signals should give you pause:

• No written contract: Walk away immediately. Verbal agreements are unenforceable for projects this size.
• Pressure to sign today: "This price is only good until Friday" is a sales tactic, not a business practice.
• Cash-only payment: Limits your recourse if something goes wrong.
• No references or reviews: Even new companies should have references from somewhere.
• Badmouthing competitors: Professionals let their work speak. Contractors who spend the estimate appointment trashing the competition are usually hiding their own weaknesses.
• Way below market price: If three contractors quote $12,000–$15,000 and one quotes $6,000, the low bidder is cutting corners somewhere — materials, labor, permits, or all three.
• Won't provide proof of insurance: End the conversation.

How to Compare Multiple Bids

Once you've asked these 15 questions to at least three contractors, comparison gets easier. Build a simple scoring sheet:

Notice that price is only 25% of the weight. The cheapest contractor who doesn't pull permits, carries no insurance, and won't return your calls will cost you more in the long run than the mid-priced contractor who does everything right.

Frequently Asked Questions

How many estimates should I get before hiring a well or septic contractor?

Get at least three written estimates. This gives you a realistic price range for your area and project scope. If all three are within 15–20% of each other, you're in the right ballpark. If one is dramatically higher or lower, ask why — there's usually a reason related to scope differences, system type recommendations, or material choices.

Can I install my own septic system to save money?

In most states, no. Septic installation requires permits that are only issued to licensed contractors. Even in states that allow homeowner installation (like parts of Maine and Missouri), you'll still need an engineered design, county permits, and inspections. A failed DIY septic system can contaminate neighboring wells and result in criminal charges in some jurisdictions. The EPA classifies improperly installed septic systems as a leading source of groundwater contamination in rural areas.

How long does it take to drill a well and install a septic system?

Well drilling typically takes 1–3 days of actual drilling, depending on depth and geology. Septic installation takes 2–5 days for a conventional system. But the full timeline — including soil testing, permitting, design, scheduling, and inspections — usually runs 4–8 weeks from first contact to completed installation. In areas with slow permitting departments, it can stretch to 12 weeks or more.

What's the biggest mistake homeowners make when hiring a well or septic contractor?

Choosing on price alone. The cheapest bid almost always cuts corners somewhere — thinner well casing, lower-grade septic tank, skipped soil testing, or unlicensed labor. The National Onsite Wastewater Recycling Association reports that systems installed by the lowest bidder have a 40% higher failure rate within the first 10 years compared to systems installed by mid-range or premium contractors (NOWRA, 2025).

Do I need separate contractors for well drilling and septic installation?

Not necessarily, but it's common. Some full-service companies handle both well drilling and septic installation. Others specialize in one or the other. Using a single contractor for both can simplify coordination — especially for ensuring proper setback distances between the well and septic system. But if the best well driller in your area doesn't do septic work, hiring two specialists is perfectly fine. Just make sure they communicate with each other about placement and timing.

Related Reading

• How Much Does Well and Septic Services Cost in 2026? Complete Pricing Guide
• The Complete Guide to Well and Septic Services 2026
• How to Find the Best Well and Septic Services Near You [2026]

-- The Groundwork Team