Leak Detection Cost: What to Pay in 2026
A hidden leak can raise your water bill and damage your home before you ever see it. Here is what leak detection typically costs, what affects the price, and how to compare quotes from licensed plumbers.
Related Guides
Typical non-invasive leak detection
$150 – $650
This usually covers electronic or acoustic testing to pinpoint a hidden leak. Slab leak detection often costs more. The repair itself is a separate cost.
Leak Detection Cost by Method
Here is a general look at the cost of leak detection. Which method your plumber uses depends on where the leak is likely hiding.
| Service | Typical cost | Notes |
|---|---|---|
| Electronic or acoustic detection | $150 – $650 | Listens for and locates a leak without cutting into walls or floors |
| Slab leak detection | $250 – $800 | Targets pipes under a concrete foundation |
| Camera or thermal imaging | Often adds to the base price | Helps confirm hidden moisture or locate pipe paths |
| Repair after the leak is found | Priced separately | Some plumbers credit the detection fee toward the repair |
Estimates only, not quotes. Ask each plumber exactly what is included.
What Affects Your Leak Detection Cost
Where the leak may be
Leaks under a slab or underground take more equipment and time to locate than a leak in an accessible wall.
Size of the home
More pipe to check generally means a longer visit and a higher price.
Tools used
Acoustic gear, thermal imaging and cameras serve different needs, and extra tools can raise the cost.
How clear the clues are
A leak with obvious signs is faster to find than a slow, hidden one with no visible damage.
Access to plumbing
Finished walls, cabinets and flooring can make it harder to test and trace pipes.
Detection plus repair
If the same plumber finds and fixes the leak, the detection fee may be credited. Ask in advance.
Low-risk clues you can check yourself. Look for a water bill that jumped without a reason. You can also check your water meter with all fixtures and appliances off to see if it still moves. Do not dig or try to repair pipes. Share what you notice with your plumber.
What a Good Leak Detection Quote Should Include
Ask for these details so the quotes you compare are truly alike.
- Which detection method or tools will be used
- Whether the price covers the entire home or one area
- If a written report or photos come with the visit
- Whether the fee is credited toward the repair
- Any extra charge for access, such as opening a small section of wall
- Clear terms for what happens if no leak is found
From Finding the Leak to Fixing It
Detection is only the first step. Once located, a plumber can explain water leak repair options and pricing. You can learn more about the process on our leak detection page.
If the plumber suspects a leak beneath the foundation, see our slab leak repair cost guide. For ongoing protection, smart leak detectors can alert you to future problems. Our plumber hourly rate guide explains typical service fees.
Ways to Save on Leak Detection
- Check your meter and water bill first so you can describe the problem clearly
- Get three written quotes for the same scope of testing
- Ask whether the detection fee is credited toward repair
- Act on early signs so a small leak does not become a large one
- Ask your insurer how water damage claims work, without assuming coverage
Get 3 Free Leak Detection Quotes
Tell us what you are seeing and we will match you with up to three licensed, pre-screened plumbers. It is free, with no obligation to hire.
Tell Us What You Need
Answer a few quick questions about your plumbing job — the problem, your timeline, and your property.
Get 3 Competing Quotes
We match you with up to 3 licensed, insured plumbers in your area who compete for your business.
Pick the Best Deal
Compare quotes side-by-side. Check pricing, warranties, and reviews, then choose the pro that fits your needs and budget.
Leak Detection Cost, Questions Answered.
How much does leak detection cost?
Non-invasive electronic or acoustic detection often costs roughly $150 to $650, and slab leak detection is often roughly $250 to $800. Repair is usually a separate charge. Prices vary by city, home size and method. Compare free quotes from licensed plumbers.
What is the water leak detection price for a slab leak?
Detecting a leak under a slab often runs roughly $250 to $800, and camera or thermal imaging may add cost. The repair itself is priced separately, so see our slab leak repair cost page for what typically comes next after the leak is found.
How do I know if I have a hidden leak?
Common clues include a rising water bill, a water meter that moves when everything is off, or damp spots and musty smells. These are only hints, not proof. Ask a licensed plumber to confirm the cause with proper detection tools before any repair work begins.
Does leak detection damage my walls or floors?
Usually not. Electronic and acoustic methods are non-invasive, which is a big reason people choose them. If a leak is found, the repair may require opening a small area, and your plumber should explain that and the cost before starting any work.
Is the leak detection fee applied to the repair?
Some plumbers credit the detection fee toward the repair if you hire them, and some do not. Ask each plumber before the visit, and ask for the policy in writing, so a credit that sounds good is actually part of the quote you are comparing.
Will insurance pay for leak detection?
Policies differ, and coverage for detection or resulting water damage is never guaranteed. Review your policy or call your insurer before you book, and keep records of the leak, the detection report and any repairs. Photos and dated bills can also help if you file a claim.
Can I fix a hidden leak myself?
It is best not to. Hidden leaks often involve walls, floors or underground lines, and a wrong move can make damage worse. A homeowner can safely note bill changes and meter readings. Learn more on our underground leak detection page.