Water damage basement repair cost in 2026.
Cleaning up and repairing a water-damaged basement costs $2,000–$7,000 in most cases, averaging around $4,000. This guide is about the bill that arrives after the water — how a restoration invoice is built line by line, why contaminated water costs several times more than clean water, and what your insurance will and won’t pick up.
✓ Last verified July 22, 2026 · all ranges are typical U.S. prices — approximate, not quotes
What water damage repair costs, by scenario.
Restoration companies do not price by the room. They price by how much water, how dirty it was, how long it sat, and how much of what it touched has to be thrown away. These are the current published U.S. figures.
| Scenario | Typical cost | What it covers |
|---|---|---|
| An inch of clean water from a burst pipeAngi · May 2026 | $500 – $1,500 | Extraction and drying, minimal material loss — the cheapest realistic outcome. |
| Two feet of water from a sewage backupAngi · May 2026 | $2,800+ | Contaminated water: everything below the line is disposed of, not dried. |
| Flooded basement cleanup (typical job)Angi · May 2026 | $2,000 – $7,000 | National range; the average sits near $4,000, or $3–$7 per square foot. |
| Basement flooding repair & restorationHomeGuide · Feb 2026 | $2,000 – $8,000 | Small to medium basement; most homeowners land around $5,000. |
| Whole-home water damage restorationHomeGuide · Feb 2026 | $2,000 – $6,000 | National average. The full published spread runs $150 to $100,000 by severity. |
| Water damage repairs before waterproofingAngi · May 2026 | $1,360 – $6,290 | Or $3–$7.50 per square foot. This is prep work, not the waterproofing itself. |
| Mold remediationAngi · May 2026 | $500 – $6,000 | A separate trade and a separate line. Budget for it if water sat overnight. |
| Restoration labourAngi · May 2026 | $50 – $150 / hour | Restoration techs, plumbers, electricians and mold specialists. Emergency call-outs cost extra. |
Prices are typical U.S. ranges at the date shown. Contaminated water, finished basements, and delayed response all push a job toward the top of every range.
Clean, grey, black — and why it triples the bill.
Restoration pricing hinges on water category. Clean water can be dried and the materials saved. Contaminated water means everything porous below the waterline is waste, and the job turns from drying into demolition and rebuild.
Clean water
A burst supply line, a failed water heater, rain through a window well. If it is extracted and dried quickly, most materials survive.
$500 – $1,500 for an inch of water Angi · May 2026Grey water
Appliance overflows, sump pump failures. It carries contaminants, needs sanitising, and clean water becomes grey water on its own within roughly a day if it sits.
Sits between the two extremes Angi · May 2026Black water
Sewage backup or ground floodwater. Requires safety measures and specialist remediation, and the EPA warns contaminated floodwater is a genuine health risk needing more extensive clean-up.
$2,800+ for two feet of water Angi · May 2026Time is a cost factor
Mold can begin growing in a basement within 24–48 hours of a leak. Once it takes hold you are paying for remediation on top of restoration.
Mold remediation $500 – $6,000 This Old House · Mar 2026 & Angi · May 2026The four stages on your invoice.
1. Extraction. Commercial pumps and extractors remove standing water. This is the fastest and usually the smallest line on the bill — and the one where speed saves you the most downstream.
2. Drying and equipment. Dehumidifiers, air movers and monitoring, often running for days. Specialised equipment is called out explicitly as a cost driver, especially where drying times run long (Angi, May 2026).
3. Demolition and disposal. Flooring, drywall, insulation, baseboards and cabinetry are cleaned, dried or removed. For Category 3 water, everything below the flood line is removed and disposed of rather than salvaged (HomeGuide, Feb 2026).
4. Rebuild. New drywall, flooring, trim and paint. This is effectively a small renovation, and it is where two identical floods diverge in price — a finished basement costs far more to restore than an unfinished one (HomeGuide, Feb 2026).
And then there’s the cause. Restoration puts the room back. It does not stop the water returning. If the source was groundwater rather than a pipe, the waterproofing job is a separate budget on top — currently $2,460 to $8,201, averaging $5,239 (Angi, May 2026). A sump pump alone runs $600 to $2,500 (HomeGuide, Feb 2026).
What insurance usually pays for — and what it doesn’t.
Usually covered: sudden, accidental events. A burst pipe or a failed water heater is the classic covered claim (HomeGuide, Feb 2026).
Usually not covered: water problems that come from settling, soil movement, or deferred maintenance — the slow, foreseeable kind (HomeGuide, Feb 2026). Surface flooding from weather is typically a separate flood policy entirely, not part of standard homeowner cover.
Document before you clean. Insurers generally want a restoration professional to assess the damage so they can determine what they will cover (Angi, May 2026). Photograph everything, including the waterline, before anything is thrown out.
We are not insurance advisers and coverage varies by policy and state — read your own policy wording, or ask your insurer in writing, before you assume either way.
The honest dividing line.
Reasonable DIY: a small area of clean water you can reach within about an hour of it happening. Shop vacuums, rented dehumidifiers and fans, and a moisture meter to check progress. Equipment rental runs roughly $50 to $150 per day, which makes DIY genuinely economical for simple situations (HomeGuide, Feb 2026).
Call a professional for anything involving sewage or floodwater, water that has been sitting, water above an inch or two, a finished basement, or any situation where you want an insurance claim to succeed. Trained technicians are also the ones who can categorise the water correctly — which is what determines whether materials get dried or disposed of.
The trap with partial DIY: hidden moisture. Water wicks into wall cavities and under flooring where a shop vac cannot reach, and drywall that looks dry can still be wet inside. If you dry the visible water yourself, it is still worth paying for a professional moisture assessment before you close the walls back up.
Basement water damage FAQ.
How much does it cost to repair water damage in a basement?
Why is sewage water so much more expensive to clean up?
How fast do I need to act?
Does homeowners insurance cover basement water damage?
Does restoration stop it happening again?
Can I dry out a flooded basement myself?
- Angi — Flooded Basement Cleanup Cost (2026 Data) · updated May 2026 · checked Jul 22, 2026
- Angi — Water Damage Restoration Cost (2026 Data) · updated May 2026 · checked Jul 22, 2026
- HomeGuide — Basement Flooding Repair Cost · published Feb 2026 · checked Jul 22, 2026
- HomeGuide — Water Damage Restoration Cost · published Feb 2026 · checked Jul 22, 2026
- HomeGuide — Basement Leak Repair Cost · published Feb 2026 · checked Jul 22, 2026
- Angi — Basement Waterproofing Cost (2026 Data) · updated May 2026 · checked Jul 22, 2026
- This Old House — Basement Waterproofing Cost · updated Mar 2026 · checked Jul 22, 2026
We publish ranges, not invented exact numbers, and we re-verify them. Found something that looks off? Tell us and we’ll re-check the batch. Read how we source costs.
Get your number, not the national one.
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