If you found or suspect something buried under your patio slab, stop all digging immediately, keep people away from the area, and call 911 if you believe it could be human remains. That's the starting point, and everything else follows from there. This guide walks you through every practical step: what the search phrase actually means, how to read the warning signs, how to investigate legally and safely, who to call, what it costs, and how to document everything so you can evaluate contractors fairly.
The Body Under the Patio Review: What to Do Safely
What 'The Body Under the Patio' Actually Means (And Which Version You're Dealing With)
Before anything else, let's make sure you're in the right place. 'The body under the patio' gets searched for a few different reasons. One is as a reference to media coverage of real-world cases where human remains have been discovered beneath concrete slabs, a phrase that shows up in news stories and documentaries pretty regularly. Another is as a reference to a specific book, film, or game title. If you're looking for a review of a creative work with that title, this isn't the article for you. If you meant the Sonance Patio Series as an audio product, you can find a detailed Sonance patio series review elsewhere. This guide is specifically for homeowners who have a real, on-the-ground concern: something looks wrong, smells wrong, or has been found beneath an existing patio slab, and you need to know what to do about it.
In the homeowner context, 'a body under the patio' almost always connects to one of three scenarios: suspected human remains, a dead animal or organic material causing odor and subsurface breakdown, or a structural/environmental hazard like a collapsed pipe, void, or chemical deposit that is causing the slab to behave strangely. Each scenario has a different response path, but the first move is the same: don't disturb the area until you know what you're dealing with.
Quick Safety Checks and What Not to Touch

The moment you suspect something serious is under your patio, treat the area like a potential scene. That means no poking around with a shovel, no breaking up the slab yourself, and no letting kids or pets wander near it. Keep a reasonable buffer of at least 10 feet around any area where you've noticed an odor, depression, crack, or other anomaly.
Here's a fast triage to run through before you call anyone:
- Is there a persistent odor that smells biological or like sewage, especially one that gets stronger in warm weather or after rain? If yes, do not enter enclosed spaces near the slab without ventilation.
- Is there visible settlement, cracking, or a section of patio that has dropped noticeably? Do not walk on that section until it has been assessed.
- Did you or someone else uncover what appears to be bone, fabric, or decomposed organic material? Stop immediately. This is a 911 call, not a contractor call.
- Is there standing water, a strong chemical smell, or discolored soil visible at any edge of the slab? This could indicate a broken sewer line or a buried hazardous material issue.
- Have you recently purchased this property and discovered a prior repair, filled-in section, or unexplained concrete pour that was not disclosed? Document it with photos before touching anything.
If at any point you think the issue involves human remains, the guidance from multiple state agencies, including Wisconsin, Florida, Massachusetts, and California, is consistent: call local law enforcement immediately, describe the location clearly, and do not disturb anything further. In some states, the coroner's office must make a determination within two working days of notification. You will not get in trouble for reporting it. You may get in trouble for not reporting it.
Signs That Something Is Wrong Under Your Patio Slab
Most homeowners who land on this topic aren't dealing with a confirmed discovery. After you handle any safety or legal concerns, you can also compare patio speaker options to find the right sound for your setup patio speaker reviews. They've noticed something that feels off and want to know whether it warrants concern. Here are the signs that consistently show up when there's a real problem beneath a concrete patio slab. If damp or lingering moisture patches show up under parts of a patio slab after rain, they can be a sign of subbase saturation or drainage and water-table issues that pull water up into the patio system Why Your Patio Retains Damp Patches Long After Rain.
Structural Red Flags

- Settlement cracks with vertical displacement, meaning one side of the crack sits measurably higher than the other. This is a reliable sign of differential settlement rather than normal shrinkage cracking.
- A section of the slab that visibly tilts, dips, or has a depression. Voids forming under the slab cause sections to sink as the subbase loses support.
- Water pooling in specific spots after rain, particularly if those spots weren't always wet. This signals a drainage change beneath the slab.
- Hollow sound when you tap the slab. A solid slab has a dull thud; a void underneath produces a noticeably hollow knock.
Environmental Red Flags
- Persistent sewage or sulfur odor that returns within hours of rain or warm temperatures, and is not resolved by cleaning the surface.
- Damp patches on the patio surface that stay wet long after surrounding areas have dried. This can indicate subbase saturation or a slow leak from a buried pipe.
- Unusual vegetation growth at the edge of the slab, such as grass or weeds pushing up through cracks in specific patches, which can indicate organic material decomposing underneath.
- Insect activity, particularly flies or certain beetles, concentrated near a specific section of the slab, especially in warmer months.
History-Based Red Flags

- A section of the patio that looks patched or poured at a different time than the rest, visible through color variation or different aggregate texture.
- Prior owners who added a patio without permits, which you can confirm by checking your local building department's records.
- Neighbors or previous residents who mentioned unusual activity or construction on the property at a specific time.
How to Investigate Responsibly and Legally
Once you've ruled out an immediate emergency requiring law enforcement, you can start a methodical investigation. The key word is methodical. Randomly breaking up a slab can destroy evidence, damage buried utilities, and create liability. Here's the right sequence.
- Pull the permit history. Contact your local building or planning department and ask for records associated with your property address. An unpermitted slab pour is not just a code issue; it's a warning sign that whoever did the work didn't want it documented.
- Call 811 before anything touches the ground. In every U.S. state, the law requires you to notify the 811 utility-locate service at least two full business days before any digging. Utility companies will then mark the locations of buried lines within roughly three business days. In most states, your locate ticket is valid for 14 to 21 calendar days. This is not optional, even on your own property.
- Get a GPR (Ground Penetrating Radar) scan. A professional GPR scan can detect voids, objects, and anomalies beneath the slab without breaking anything open. Expect pricing in the range of $250 to $300 per hour for smaller residential jobs, though total project cost varies significantly by geography and scope. GPR works best for locating distinct objects like rebar, conduit, and voids with good air or water contrast. It has limitations: it may miss features in saturated or clay-heavy soils, and results require professional interpretation. Any scan provider worth using will give you a written statement of limitations with their report.
- Add a sewer camera inspection if odor is a factor. If you're getting sewage smells, a plumber with a CCTV pipe inspection camera can run the line from a cleanout to check for cracks or collapses under the slab. This is inexpensive compared to breaking concrete and is often the fastest way to confirm or rule out a pipe failure.
- Consider infrared thermography for moisture. A certified thermographer can use thermal imaging to detect moisture anomalies at the surface of the slab, though this method works best when there's a temperature differential between the wet and dry areas. It's a useful add-on, not a standalone diagnostic.
- Do not break the slab yourself. Even with GPR results in hand, the actual excavation should be done by a licensed contractor. You need documentation of what was found, how it was found, and in what condition, for legal, insurance, and contractor-review purposes.
Who to Call and When: Matching the Problem to the Right Professional

The contractor you need depends entirely on what the investigation turns up. Here's a practical breakdown. If you are shopping for speakers or outdoor audio gear, you can also compare real-world feedback from Polk Audio patio 200 reviews before buying.
| Situation | Who to Call First | Who May Also Be Needed |
|---|---|---|
| Suspected human remains | 911 / local law enforcement | County coroner or medical examiner, state historical commission if Native American remains may be involved |
| Confirmed or suspected biohazard after site release | Licensed biohazard/crime scene remediation company | Environmental consultant, general contractor for slab repair after cleanup |
| Structural void, settlement, slab failure | Licensed general contractor or structural engineer | Geotechnical engineer, concrete lifting/mudjacking specialist |
| Broken sewer or drain line | Licensed plumber with CCTV inspection capability | Excavation contractor if line needs replacement |
| Unknown buried object (not human, not utility) | GPR scanning company for assessment | General contractor, potentially environmental consultant depending on material |
| Unpermitted construction concern | Local building department for permit research | Real estate attorney if you're a recent buyer, licensed contractor for code compliance assessment |
On the biohazard side specifically: if law enforcement confirms remains and eventually releases the site back to you, do not attempt cleanup yourself. OSHA's bloodborne pathogens standards require proper PPE, training, and medical surveillance protocols for anyone handling potentially infectious materials. Specialized biohazard remediation companies, sometimes called trauma or crime scene cleanup services, handle decontamination, disposal, and documentation in compliance with those standards. This is not a category where you want to improvise.
Cost, Timeline, and What to Document Before You Write That Review
Cost and timeline vary dramatically based on what's actually under the slab, so treat any estimate as a range until you have a confirmed diagnosis. That said, here's what to expect at each stage. If you are comparing options, the Olympic Patio Tones Review can help you understand what to look for before you commit to a contractor or product.
| Service | Typical Cost Range (2026) | Timeline |
|---|---|---|
| GPR scan (residential, small area) | $250–$500+ depending on hours and scope | Scheduling 1–5 days; results same day or within 24–48 hours |
| CCTV sewer camera inspection | $150–$400 depending on line length and access | Often same day or next day scheduling |
| Biohazard remediation (crime scene/remains) | $1,000–$25,000+ depending on contamination extent | Initial response often within 24 hours; full remediation 1–5 days |
| Slab lifting/void filling (mudjacking or polyurethane) | $3–$25 per square foot depending on method and severity | Usually 1–2 days once scheduled; material cure within hours |
| Full slab removal and replacement | $6–$15+ per square foot for a residential patio | Demo to pour typically 1–2 weeks including cure time |
| Sewer line repair/replacement under slab | $2,000–$15,000+ depending on depth and length | 1–5 days depending on method (trenchless vs. open excavation) |
Now for the documentation piece, because this matters both for your own protection and for writing a useful review of any contractor you hire. From the moment you notice the problem, keep a dated photo log. Every crack, every odor event, every visit from a professional should have a timestamp. When you get quotes, ask each contractor to give you a written scope of work that describes specifically what they found, what they propose to do, and what the limitations of their diagnostic methods are. A GPR provider, for example, should give you a written statement of limitations explaining what their scan can and cannot detect. If a contractor refuses to put scope and limitations in writing, that's a red flag worth noting in any review you later write or read on this site. If you're also looking for practical buyer guidance, a sonance patio series 4.1 review can help you compare key features and performance before you decide.
When comparing contractor quotes, look for consistency in what they're diagnosing. If three contractors give you wildly different explanations for the same set of symptoms, the outlier deserves scrutiny. The best reviews I've seen on platforms like this one focus on exactly these details: did the contractor show up when promised, did they explain what they found in plain language, did the final bill match the estimate, and did they leave documentation you could actually use. If you're searching for ford patio reviews, focus on whether customers describe clear communication, proper documentation, and reliable timelines. Those are the data points worth capturing.
Prevention: How to Keep Future Patio Projects From Hiding Surprises
The best time to prevent a buried-problem scenario is before the concrete is ever poured. If you're planning a new patio or evaluating a contractor's proposal, here's what to insist on. If you're also thinking about patio upgrades, you can compare options like bluetooth patio speakers reviews to help narrow down what to buy without jumping straight into expensive mistakes.
- Require a permit. A permitted patio pour means the project is on record, inspected, and tied to your property's history. Any contractor who pushes back hard on this should raise your suspicion.
- Ask for subbase preparation documentation. A proper patio installation includes compacted gravel base material, typically 4 to 6 inches, and adequate drainage slope. Ask your contractor to photograph the base before the concrete goes down.
- Call 811 before any ground is broken. Even if your contractor does this routinely, confirm it yourself. You're the property owner; the liability is yours if utilities are hit.
- Check for prior construction on the lot. Before pouring, walk the area and probe for any anomalies in the soil. Disturbed, refilled, or soft soil in a specific area is worth investigating before it gets locked under concrete.
- Get a pre-pour inspection if you're building over any area with a complex utility history or if the lot has changed hands multiple times. A quick GPR scan of the raw ground before a pour is far cheaper than cutting into finished concrete later.
- Document the finished installation. Photograph the completed base, any embedded utilities or conduit, and the finished slab. Store this with your property records. Future owners, contractors, and your own future self will thank you.
Choosing a good contractor upfront is genuinely the most effective prevention strategy. If you're researching patio companies and reading reviews, pay attention to how contractors handle site prep, documentation, and permit compliance, not just the finished product photos. If you are looking for koda patios reviews, focus on how quickly they respond to safety concerns and whether their past work addresses documentation and site preparation. The patterns you see in verified customer reviews often reveal whether a company is cutting corners on the steps that matter most. That's exactly the kind of information this site is built to surface, so use it before you sign a contract rather than after you've discovered a problem.
FAQ
What should I do in the first 15 minutes after I notice something under my patio?
Stop digging, keep everyone away, and take a wide photo from several angles so you have a baseline before anything changes. If there is a strong odor, note wind direction and whether symptoms get worse when the area heats up. Then call the appropriate emergency or local non-emergency line (and 911 if you suspect human remains).
Is it safe to break a small test hole in the slab to “see what’s there”?
No. Even if you think it is likely an animal or a pipe leak, you can damage utilities, spread contamination, and destroy evidence if remains are involved. Instead, mark the area and wait for a methodical assessment such as a licensed investigator or appropriate scan service.
How far should I keep people and pets away from the slab?
Use a minimum 10-foot buffer around the suspected zone, and increase it if you notice active seepage, ongoing odor escalation, or visible cracking. Keep pets leashed and away from runoff paths, since odors and fluids can travel beyond the crack line.
What if I smell something but I do not see any cracks or sinking?
Odor alone can indicate subsurface breakdown, a leak, or trapped organic material. Document the time of day, temperature, and whether the smell intensifies after rain or when HVAC runs nearby. Treat it as a potential hazard anyway, and avoid disturbing the slab until an inspection clarifies the cause.
Who do I call first, law enforcement, the city, or a contractor?
If there is any possibility of human remains, start with local law enforcement, then follow their instructions for access and investigation. If there is no remains concern and the issue looks like a utility problem, call the relevant utility or a licensed plumber or leak detection firm first, then bring in a structural or remediation specialist if needed.
Can I hire a GPR or scanning company before law enforcement is involved?
Only if law enforcement confirms it is appropriate and access does not interfere with their response. If remains are suspected, wait until the site is cleared for investigative work. Otherwise, scanning can help, but it should be scheduled with clear permission for entry and documentation.
What does “methodical investigation” look like in practice?
It usually means starting with non-invasive documentation (photos, measurements, odor log), then targeted diagnostics (scan or moisture/leak tests) that answer a specific question, followed by a narrowly scoped access plan. Ask for a step-by-step sequence and what triggers escalation to an invasive method.
What should be included in a written scope of work so I can compare bids fairly?
Ask for the suspected cause, specific diagnostic steps, what areas will be accessed, disposal or remediation responsibilities (if applicable), and the limits of what they can confirm. Also require a clear schedule of visits and what constitutes “completion,” plus how change orders will be handled if findings differ from initial assumptions.
Are there common red flags I should watch for when choosing a contractor?
Avoid anyone who promises certainty without explaining diagnostic limitations, refuses to provide written scope and scan limitations, or pressures you to break the slab quickly. Inconsistent explanations across bids for the same symptoms is also a warning that at least one party may be guessing.
What if the slab damage spreads after a contractor opens a section?
Request a written change-control plan. Clarify in advance how additional access points will be approved, who is responsible for any added utilities risk, and what documentation you will receive for the expanded work.
How do I document properly without getting in the way of professionals?
Use a dated photo log (wide establishing shot plus close-ups of each anomaly), record dates and times of odors or seepage, and keep notes on who visited and what they said. Do not take measurements that require entering hazardous areas, and avoid removing debris that could become evidence.
If it’s not remains, can I do cleanup myself if I think it’s just an animal or organic material?
You may be able to handle minor debris removal safely only if professionals confirm it is not biohazard-level contamination and there are no hazardous chemicals or structural risks. In general, if there is bodily fluid exposure, strong persistent odors, or unknown materials, you should use a licensed remediation service and follow their disposal requirements.
What questions should I ask about permits and inspections before repairs?
Ask whether permits are required for jackhammer access, utility penetrations, or any chemical remediation. Confirm whether the contractor will coordinate inspections and utility notifications. Also ask for written confirmation that their work will not violate local code requirements for structural reinforcement and slab reinstatement.
How should I interpret cost estimates if no confirmed diagnosis exists yet?
Treat early pricing as ranges tied to diagnostic outcomes, not guaranteed totals. Ask for “best-case, likely-case, and worst-case” figures tied to specific triggers, such as finding a void, encountering utilities, or needing remediation beyond initial access.
What information should a final report or closeout include?
Request a written summary of findings, diagnostics performed, areas accessed, what was removed or remediated, disposal or decontamination documentation if relevant, and photos after work is completed. If scanning was used, ask for scan outputs or an explanation of how the results led to the chosen method.

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