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Flooded Basement Cleanup Cost

Flooded Basement Cleanup Cost

National average
(cleaning 2-feet of gray water from 500 sq.ft. basement)
Low: $2,000

(cleaning up 2-inches of clean water from 500 sq.ft. basement)

High: $15,000

(cleaning 2 feet of black water from 500 sq.ft. basement, plus mold remediation)

Cost to have a flooded basement cleanup varies greatly by region (and even by zip code).
Get free estimates from local contractors in your city.

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Flooded Basement Cleanup Cost

National average
(cleaning 2-feet of gray water from 500 sq.ft. basement)
Low: $2,000

(cleaning up 2-inches of clean water from 500 sq.ft. basement)

High: $15,000

(cleaning 2 feet of black water from 500 sq.ft. basement, plus mold remediation)

Cost to have a flooded basement cleanup varies greatly by region (and even by zip code).
Get free estimates from local contractors in your city.

The average cost of having a flooded basement cleanup is $3,000 - $10,000.

How Much Does It Cost to Have a Flooded Basement Cleanup?

Whether it’s a few inches of water, or a few feet, there aren’t many things more disturbing to homeowners than a flooded basement. Water in your basement can cause a lot of damage in a very short amount of time, which means that any time you discover a basement flood, you need to deal with it in as quick a timeframe as possible.

There are many factors that can impact the cost of a flooded basement cleanup, from the size of the space to the source of the flood. The average range of costs most homeowners may pay for a 500 square foot basement contaminated with 2 feet of gray water is from $3,000 to $10,000, with most homeowners paying around $6,500 for full flood remediation and cleanup of the area.

Flooded Basement Cleanup

Flooded basement cleanup costs
National average cost$6,500
Average range$3,000 - $10,000
Minimum cost$2,000
Maximum cost$15,000

Dangers of Water Damage in the Basement

As annoying as a flooded basement is, there are a lot of hidden dangers that can often arise along with the damp. The type of danger your basement may be facing will be determined by several factors including how much water there is, how quickly you are able to deal with it, and what kind of water has infiltrated.

In all cases, having water in your basement can lead 1 to mold and mildew growth, particularly if you are unable to get the water out and materials dried quickly. Mold will begin to grow within 48 hours, so timing is important when dealing with a basement flood.

There are additional issues with material damage that can come from prolonged contact with moisture as well. This can include softening or deteriorating of drywall 2, wood rot, and electrical shortages with appliances that are usually stored in the basement, such as HVAC or water heaters.

Finally, the type of water that can flood a basement may play a role in other dangers. There are three types of water: clean water is what happens when a pipe bursts. This water poses the lowest amount of damage, as the water is clean and doesn’t harbor bacteria.

Gray water may come from an appliance or from the ground outside. It may contain chemicals, soaps, or bacteria and it may contaminate belongings that it comes in contact with. Depending on the amount of gray water and where it’s determined to have come from, you may need to throw away or disinfect everything that it touches.

Black water is the most dangerous type to flood a basement and usually comes from a failed sewage line or similar situation. This type of water will contain harmful levels 3 of bacteria, and the entire space will not only need to be dried and cleaned, but also disinfected as it will pose serious health risks to everyone in the home. Many items that cannot be cleaned and disinfected will need to be replaced if your basement is flooded with black water.

Flooded Basement Causes

Basements can flood for a wide variety of reasons, many of which will need to be addressed before you start the basement cleanup in order to prevent the water from continuing to infiltrate.

Improper Sealing

Your basement walls and floors need to be sealed against moisture. Improper sealing could mean a flood after a heavy rain not because of a fault in the foundation, but simply because concrete is porous.

Drainage System Failure

Drainage systems are a good way to help prevent flooding if you live in an area with heavy rainfall or have a lawn that slopes toward your home. However, if your system becomes clogged or fails in some way, you can find that your basement will flood quickly after it happens.

gutter and Downspout Issues

If your gutters are clogged, resulting in water sheeting off your roof in the wrong area, or if your downspouts are not directing the water far enough away from your foundation, then this could be the cause of a basement flood.

water Supply Line/pipes/hot Water Tank

Any of the plumbing in your home could lead 1 to a flood if a break, rupture, or other failure occurs. If your pipes freeze during the winter months, the rapidly expanding ice could cause a pipe to burst, and when the ice melts it could flood your basement. Likewise if your hot water tank were to leak or burst, this could cause a flood.

sewage Failure

If your septic tank fails or the sewer line 4 leading 1 from your home were to break, this can also lead 1 to a flood in your basement. This is the most dangerous kind of flood, as the water will usually contain high levels 3 of bacteria.

Cleanup Process

As soon as you notice a flood or water in your basement, your first action should be to cut the power to the area to avoid electrical problems, and to call in a service team. A representative from the flood remediation service will come and inspect the area, and determine the cause of the flood, the extent of the damage, and the appropriate action plan.

This will usually start with determining if the water is still entering the home. For example, if the flood is caused by rainfall, the ground outside will need to recede at least somewhat before the water inside can be pumped 5 out. Or if it’s a burst pipe, the water will need to be turned off.

Next, the water in your basement will be removed. If possible, a submersible sump pump 6 will be used to pump 5 the water out of your home, but if it’s only a few inches, then a wet/dry vac could be used to remove the water.

Next, any mud 7 that entered the home needs to be removed while it’s still damp. Mud 7 on the walls or furnishings will be hosed off, while mud 7 on the floor can be scraped and shoveled out. This has to be done before the mud 7 dries, as it will then be too hard to remove.

Any soft materials or furnishings can now be removed from the basement to a well ventilated area to dry if the water was clean. If the water was grey or black, the materials and furnishings will be evaluated, and they may be removed for cleaning and disinfecting as well as drying. Some materials may be disposed of.

If the drywall 2 has been damaged or if any materials cannot be easily dried and saved, these will be removed and disposed of. Any hard surfaces that remain will need to be thoroughly cleaned, usually using a mixture that contains bleach or another cleanser that is capable of killing any microorganisms that are left on the surfaces. The rest of the space will be dried, usually using a combination of fans and dehumidifiers. Air scrubbers may also sometimes be necessary if there are a lot of odors or if mold has begun to grow.

Labor Costs

Labor costs for dealing with a flooded basement vary depending on the size of the space and the type of water that has infiltrated. Most remediation services for this type of job will have a flat rate for dealing with different levels 3 of cleanup, then will also charge by the square foot for labor, with a different cost associated for each type of water - clean water cleanup will start at $3.75 a square foot, gray water at $4.50 a square foot and sewage or black water cleanup costs start at $7.00 a square foot.

This is just the cost of the labor; if you need belongings removed to be decontaminated or disposed of you will have additional costs. For a 500 square foot basement that has been contaminated with 2 feet gray water, your labor costs will be around $3,750 (square footage of water), plus the base cost of the cleanup for a total of $6,500 on average. The same amount of space may cost more or less to clean depending on the depth and type of water that flooded the area.

Repair Costs After a Basement Flood

In addition to the cost of cleaning, drying, and disinfecting the basement, you may also have additional repair costs. For example, if your HVAC system was flooded, it will need to be cleaned and repaired by a technician, with most furnace repair costs ranging from $1,000-$1,700. If it cannot be cleaned and repaired, you may need to replace it, with the average furnace costing $3,000-$5,000.

If drywall 2 needed to be removed, you will need to pay to have new drywall installed in your basement, with costs starting at around $1,500. If your basement was carpeted, you will likely need to replace the carpeting as well, with costs starting at about $980.

You may have additional costs as well, particularly if there was structural damage done to your foundation during the flood. Foundation repair costs start around $5,000.

Enhancements and Improvements

Installing a Sump Pump

If your basement floods, you may want to consider installing a sump pump to prevent this from happening again in the future. Sump pumps are sized to your basement, and typically cost $550-$1,100 on average.

Document Drying

If you have been storing papers or documents in your basement when it flooded, you may want to pay for document drying to try to salvage as much as possible. This service costs between $50 and $100 per cubic meter 8 of paper, depending on the level 3 of moisture.

Mold Remediation

Mold can start to grow within just 48 hours after a flood, so if you may need to have mold remediation done if drying couldn’t start in a timely way. Remediation costs begin around $2,000.

Leak Alarm

Water alarms or leak alarms can detect moisture levels 3 beginning at 1/32 of an inch, and can help you prevent a lot of flood damage. They start around $30 a piece.

Additional Costs and Considerations

  • Always make sure you turn off all electricity and gas to the basement, and check outside walls for structural damage before you enter a flooded basement. You can begin positioning fans to blow fresh air into the basement right away as well.
  • Flooded basements are often not covered on homeowner’s insurance unless you specifically purchase flood insurance, or if the flood was caused by another issue, which was covered. Speak to your insurance agent to find out more.
  • In some emergencies, your local fire department may be able to assist with pumping 5 water from your basement or they may have portable pumps 5 you can borrow.
  • If your basement has been waterproofed, it should have a tar sealant on both sides of the foundation, as well as weeping tiles to pull water away from your home. If the amount of water is too much for the system, your basement can flood.
  • If you intend to do the cleanup yourself, make sure you start as quickly as possible, as even a small delay can lead 1 to significantly higher costs.


  • How much does it cost to clean up a flooded basement?

The average cost to clean a flooded basement is around $6,500, but may be higher or lower depending on the size and cause of flood.

  • Is a flooded basement covered by homeowners insurance?

Most are not unless you purchase separate flood insurance, but some instances may be covered. Call your insurance agent to find out more.

  • Why is my basement flooding when it rains?

If your waterproofing system has failed, your gutters are clogged, downspouts not far enough from the home, or your yard slopes to your foundation, your basement could flood.

  • What would cause my basement to flood?

Basements can flood for many reasons including heavy rain, lack of waterproofing, a burst pipe, failed storage tank, failed septic field, and more.

  • How do I stop my basement from flooding in heavy rain?

Have a trench dug and a sump pump installed, along with waterproofing on your walls to help prevent flooding.

  • Can water come up through concrete basement floor?

Yes, if the groundwater is high enough and your concrete is not waterproofed.

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Remodeling Terms Cheat Sheet

Definitions in laymen's terms, cost considerations, pictures and things you need to know.
See full cheat sheet.
glossary term picture Lead 1 Lead: A naturally occurring heavy metal that is highly toxic to humans, and has been used in paint, gasoline, piping, and other applications
glossary term picture Sheetrock 2 Drywall: Type of plasterboard, commonly used to build walls and ceilings, composed of gypsum that is layered between sheets of heavy paper
3 Levels: The process of evening out the ground's surface, making it either flat or sloped.
glossary term picture Sewer Line 4 Sewer line: Principal pipe in a sewage system
glossary term picture Pump 5 Pumped: A device used to move air, liquid, or gas by mechanical means
glossary term picture Sump Pump 6 Sump pump: A mechanical device used to remove water from wet areas such as basements and crawlspaces in order to help prevent flooding
7 Mud: A material used to fill and smooth over gaps between sheets of drywall to produce an even, flat wall. It is made of gypsum, clay and latex resin that is then mixed with water
glossary term picture Meter 8 Meter: A device that measures the energy used by a home

Cost to have a flooded basement cleanup varies greatly by region (and even by zip code). To get free estimates from local contractors, please indicate yours.

Building basement flooded

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Hartford, CT
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