Sewage Cleanup Cost: $2,000 to $15,000 or More (HomeGuide)

Sewage backup: what to do right now

1. Stop using water. Do not run sinks, showers, the washer or toilets; every drain in the house feeds the same blocked line.
2. Keep children and pets away. The Connecticut health department's sewage fact sheet says sewage carries bacteria, viruses and other germs, and to keep children and pets away from it.
3. Stay out of the water near outlets. If water is near outlets or the panel, shut off power at the breaker only if you can reach it from a dry spot. Otherwise call an emergency electrician.
4. Gear up if you must go in. The CDC says to wear rubber boots, rubber gloves and goggles in contaminated water.
5. Photograph it and call your insurer. Then call a cleanup company and a plumber to clear the line.

Is a sewage backup an emergency?

Yes. Sewage is Category 3, grossly contaminated water in the IICRC S500 standard, and the Connecticut health department's fact sheet says it carries bacteria, viruses and other germs. Stop using water, keep children and pets away, and call the same day.

Waiting costs money too: HomeGuide puts a small one-room spill at $2,000 to $3,000 and a backup that spreads to several rooms at $3,000 to $7,000. Expect an emergency or after-hours fee of $200 to $500 in HomeGuide's figures if the crew starts at night.

How much does sewage cleanup cost

Sewage cleanup costs $2,000 to $15,000 or more for most homes, HomeGuide says, or $7 to $15 or more per square foot. Fixr prices a sewage backup cleanup at $2,000 to $10,000 per project. Extraction and drying alone run $7 to $7.50 per square foot for black water in HomeAdvisor's 2026 water damage guide, before anything is torn out or replaced.

HomeGuide's page is titled 2026 and dated August 2025. Its top tier includes rebuilding.

Price rises with how far the sewage spread, from one room to several, and with how much has to be torn out and replaced. HomeGuide says basements and crawl spaces cost more than ground-level cleanup.

Other costs on a sewer backup job

Plumbing and rebuild costs that often come with the cleanup.

Category 3 water: why sewage is handled differently

Sewage is Category 3 water, the IICRC's term for grossly contaminated water, and porous materials it touches are usually thrown out rather than dried. The IICRC S500 standard sorts water damage into three categories; Category 1 comes from a clean source, Category 2 has significant contamination, and Category 3 includes sewage. Clean water can also turn into Category 3 if it sits.

• What has to go: the CDC says to throw away items that cannot be disinfected, such as wall coverings, cloth, rugs and drywall. Massachusetts DEP adds mattresses, pillows, upholstered furniture, carpet padding, stuffed toys, food and medicine.
• Drywall: the Connecticut fact sheet says to cut wallboard out several inches above the water line.
• Hard surfaces: the Connecticut fact sheet says to wash with detergent first, then disinfect. The CDC and state health agencies give different bleach mixes, so follow the CDC or the product label. Never mix bleach with ammonia or other cleaners.
• Drying: Massachusetts DEP says to use dehumidifiers and active ventilation; water damage restoration covers the drying steps.

Sewage backup health risks

Sewage exposure most often causes stomach and intestinal illness and skin rashes, according to the Connecticut health department's fact sheet, which says respiratory infections are uncommon. The CDC says floodwater that may contain sewage can cause wound infections, skin rash and gastrointestinal illness. Keep open cuts out of the water, and cover clean wounds with a waterproof bandage. Wash hands with soap and water after any contact.

Sewer backup: causes and fixing the line

A sewer backup is a plumbing problem first and a cleanup job second; the line has to be cleared and repaired or it will back up again. The home insurer Openly lists common causes: blockages in the city sewer, heavy rain overwhelming the system, aging pipes, and grease and wipes flushed into the line. HomeGuide puts a sewer camera inspection at $125 to $500 and full line replacement at $2,000 to $10,000.

• One slow or clogged drain: start with drain cleaning.
• Several drains backing up at once: ask the plumber about the main line. See sewer line repair.
• Happening at night or on a weekend: an emergency plumber can clear the line while the cleanup crew works.
• Basement flooding in storms: ask about a backwater valve. The CDC recommends backflow valves or plugs on drains, toilets and other sewer connections. A failed pump is a sump pump repair job.

For any of these, the plumber line is the right call for the pipe; this page's line is for the cleanup.

Does homeowners insurance cover sewer backup

Usually not, unless you added it. Openly says homeowners insurance typically does not cover sewer backup, and that coverage comes from a sewer backup endorsement, also called a rider, for a relatively modest premium. HomeGuide says most standard policies exclude sewage backup damage. Check your declarations page for a water backup endorsement and its limit.

Call your insurer before cleanup if you plan to claim, photograph everything, and do not sign an assignment of benefits or any contract that hands your claim to the contractor. Florida voids assignments on policies issued on or after January 1, 2023.

Sewage cleanup near me: what to ask

• Do you treat this as Category 3? The answer should be yes, with removal of porous materials the sewage touched.
• How will you contain it? Ask how they keep contamination out of clean rooms and the HVAC system.
• Will you test after cleanup? HomeGuide suggests asking about post-cleanup testing; it lists indoor air quality testing at $200 to $500.
• License and insurance: ask for the license number and proof of insurance, and check them yourself.
• Written estimate: do not sign one with blank spaces, and do not pay the whole bill up front.

If mold shows up later, see mold remediation; drying and repair prices are on water damage restoration cost. Calls go to an independent company that serves your area and takes this kind of job. How calls work.

Sewer line costs in depth: trenchless sewer line replacement cost, sewer camera inspection and hydro jetting cost.

Sewage spill cleanup: a small spill in one room

A sewage spill confined to one room costs $2,000 to $3,000 to clean up in HomeGuide's figures, at $7 to $15 or more per square foot, and the same Category 3 rules apply as to a whole-house backup: porous materials the sewage touched come out.

• A toilet overflow or a backed-up tub: stop using water, keep children and pets out of the room, and wear rubber boots, rubber gloves and goggles if you must step in (CDC).
• What a company would remove: the CDC says to throw away items that cannot be disinfected, such as rugs, cloth and drywall; the Connecticut fact sheet says wallboard is cut out several inches above the water line.
• Hard floors: washed with detergent first, then disinfected (Connecticut fact sheet). Follow the product label or CDC guidance for the mix.
• After hours: HomeGuide lists an emergency fee of $200 to $500 on top.