Why Is My Basement Flooding? Cleanup Costs $2,000 to $7,000

Cleanup covers water removal, drying and disinfecting. HomeAdvisor puts repairs after drying at $1,300 to $5,500 or more on top.

Do this now: water in the basement

Safety first, then stop the water, then document it, then start drying.

1. Stay out of water that could reach outlets, cords or appliances. Ready.gov and the Red Cross say not to touch electrical equipment if it is wet or if you are standing in water. Shut off power at the breaker only if you can reach the panel without standing in water. If you cannot, stay out and call the electric utility.
2. Smell gas? Leave the house and call the gas utility or 911 from outside. FEMA says not to use gas appliances until a professional has checked them.
3. If a pipe burst, shut off the main water valve. Denver Water says it is usually in the basement or crawl space on the wall that faces the street.
4. Photograph the damage before you clean up (FEMA), then call your insurer as soon as possible.
5. Never sign over your claim. Do not sign an assignment of benefits or any contract that gives a contractor control of your insurance claim. In Florida, policies issued on or after January 1, 2023 cannot be assigned at all (Fla. Stat. 627.7152).
6. Treat floor-drain or sewer water as sewage. The CDC says floodwater may contain sewage; wear rubber boots, rubber gloves and goggles, and keep children and pets away.
7. Start drying within 24 to 48 hours. The EPA says wet materials dried in that window usually do not grow mold.

Is it an emergency? When a flooded basement needs a call today

A flooded basement needs a call today when water is still rising, reaches outlets, the furnace or the water heater, or came from a sewer backup, because the EPA says wet materials should be dry within 24 to 48 hours to keep mold from growing.

• Call now: water is rising, or the sump pump has stopped during a storm. See sump pump repair.
• Call now: sewage came up through a floor drain or toilet. HomeAdvisor prices black water cleanup at $7,000 to $15,000, and Fixr's high-end case is $50,000 for a basement sewer backup. See sewage cleanup.
• Call now: water reached the water heater or furnace. Rheem says to turn off power and water to a water heater that has been flooded, and FEMA says to have gas appliances checked before you use them.
• Same day: carpet or drywall is soaked but the water has stopped. The 24 to 48 hour drying clock has started.
• Can wait a day or two: a damp patch that dries on its own after rain. Book a waterproofing visit before the next storm.

Why is my basement flooding? The common causes

Most basement flooding comes from heavy rain soaking the soil next to the foundation, a sewer backup, a failed sump pump, a burst pipe or a leaking water heater. The DOE's Building America guide says roof runoff can quickly saturate the soil around a house and wick through the foundation, and HomeAdvisor lists high water tables and poorly graded ground among the natural causes. Where the water shows up tells you which one it is:

Causes from DOE Building America, Openly (Jan 2026), Fixr (Jan 2025) and HomeGuide (Jan 2026).

HomeGuide says block foundations are more prone to leaks than poured concrete, because water gets in at the seams and joints. If the basement floods every heavy rain, the fix is outside the house as much as inside: see the prevention section below.

Burst pipe signs in a basement

A burst pipe in a basement shows up as a bulging or cracked pipe, frost on the pipe, a faucet that gives no water or a slow trickle, or dampness on walls and ceilings, according to Angi's 2026 frozen pipe guide. Angi also lists whistling or banging pipes and a foul smell from the faucet. Shut the main valve first. HomeAdvisor puts burst pipe repair at $200 to $3,000, with a $500 average, and ConsumerAffairs prices a basement pipe repair at $100 to $400. Steps for frozen lines are on frozen pipes, and repair prices on burst pipe repair.

How to get water out of a basement

Water comes out of a basement with a pump or a water extraction vacuum, and then the room is dried with dehumidifiers and fans, the order the EPA lists for carpet and concrete in its water damage cleanup table. HomeAdvisor puts removing one inch of clean water at $500 to $1,500, and Fixr puts drying a 500 square foot basement at $2,000 to $7,000 before any repairs. Massachusetts DEP says to run dehumidifiers and keep air moving after a flood.

Do not wade in to move things if the water could reach anything electrical. Ready.gov warns that floodwater can be charged by underground or downed power lines and may hide debris.

How to dry wet carpet in a basement

Wet carpet has to be dry within 24 to 48 hours: the EPA's cleanup table says to pull the water out with an extraction vacuum, then run a dehumidifier and fans. What can be saved depends on the water:

• Clean water (a supply pipe or the water heater): carpet can often be dried in place with extraction, a dehumidifier and fans (EPA).
• Floodwater or sewage: Massachusetts DEP says to throw out carpet padding, upholstered furniture and cardboard, and the CDC says to discard rugs, drywall and other items that cannot be disinfected.
• Drywall: the EPA says it may be dried in place if it is not swelling and the seams are intact; otherwise it comes out.
• Ceiling tiles and insulation: the EPA says to discard and replace cellulose and fiberglass insulation and ceiling tiles.
• Upholstered furniture: the EPA says it may be hard to dry fully within 48 hours.

HomeAdvisor prices carpet repair or replacement after a basement flood at $1,000 to $5,000 and drywall at $500 to $2,500. Full restoration prices are on water damage restoration cost.

Does homeowners insurance cover basement flooding?

Homeowners insurance usually does not cover flooding from outside: Ready.gov says homeowners policies do not cover floods, and a separate National Flood Insurance Program policy typically takes up to 30 days to start. Water from inside is different. HomeAdvisor and HomeGuide say homeowners policies generally cover sudden and accidental damage such as a burst pipe, but not damage from neglect or poor maintenance.

• Sewer or sump backup: Florida's Department of Financial Services says standard policies do not typically cover water that backs up from a sewer, sump or drain, and that a water backup endorsement adds it. Fixr puts that rider at $50 to $250 a year.
• Before you clean: Triple-I says to photograph the damage, save receipts and call your insurance professional.
• Do not sign over the claim: keep the claim in your name and do not sign an assignment of benefits. Florida voids assignments on policies issued on or after January 1, 2023.

How to prevent basement flooding during heavy rain

The cheapest fix is moving roof water away from the house: the DOE's Building America guide says downspouts should empty onto ground that slopes away, at least 5 feet from the foundation. FEMA says to buy sump pumps with backup power and to have a licensed plumber install backflow valves so sewage cannot back up through floor drains. HomeGuide's 2026 prices for the rest:

HomeGuide puts basement waterproofing overall at $6,000 to $18,000 depending on the method and how bad the problem is.

Clear and repair gutters first; gutter repair has those prices. For the pump itself, sump pump repair covers battery backups and how long pumps last.

Basement mold after a flood

Mold can start on wet materials that are not dried within 24 to 48 hours, the EPA says, and a moldy area larger than about 10 square feet, or a lot of water damage, calls for professional cleanup. HomeAdvisor puts basement mold remediation at $500 to $3,000. See mold remediation for what the job includes.

Who to call for a flooded basement

A flooded basement usually needs two calls: a water damage company to pump, dry and disinfect, and a plumber to fix the source if it was a pipe, a sump pump or a sewer line. Ask the water damage company for its inspection fee, whether it will take moisture readings before and after drying, and whether the quote separates drying from rebuilding. Ask for its license number and proof of insurance before work starts.

More on each job: water damage restoration, plumbers and every trade's prices on home repair costs. Local water damage pages: Chicago, Philadelphia, Boston and New York. Calls go to an independent company that serves your area and takes this kind of job. How calls work.

Flooded house cleanup cost: when the water reaches the main floor

Flooded house cleanup costs $1,383 to $6,369 for most homes, with a $3,868 average, in HomeAdvisor's 2026 water damage guide, against $2,000 to $7,000 for a basement alone; HomeGuide's 2026 average is $2,000 to $6,000, and Fixr's typical range is $1,200 to $5,000.

• Per square foot: extraction and drying run $3.50 to $7.50 (HomeAdvisor) or $4 to $12 (HomeGuide), rising with the water category; outside floodwater is treated as Category 3.
• By room: Fixr prices a bathroom at $500 to $4,500, a laundry room at $1,000 to $5,500 and a kitchen at $1,750 to $8,000, with basements from $2,000 up.
• Flood insurance: Ready.gov says homeowners policies do not cover floods; a separate National Flood Insurance Program policy does, and it typically takes up to 30 days to start.
• The first two days: the EPA's 24 to 48 hour drying window applies on every floor; the steps are on water mitigation.