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Foundation Waterproofing Cost

Foundation Waterproofing Cost

National average
(1,500 sq.ft. foundation)
Low: $3,000

(drain or sump pump)

High: $10,000

(excavating, sealant, drains & extra support)

Cost to waterproof a foundation varies greatly by region (and even by zip code).
Get free estimates from waterproofing contractors in your city.

How Much Does It Cost to Waterproof a Foundation?

Waterproofing a foundation can repair and prevent major structural issues. With such a wide variety of issues, including flooding, mold, warped walls, cracks, and dropping floor, the costs also vary greatly. To waterproof a standard 1500 square foot foundation, it will cost an average of $5,000-$10,000.

Cost Breakdown

  • The first step is to examine the foundation for cracks or problems. A professional can do this but will charge you a consultation fee of $100-$300. Examining the foundation yourself for potential issues can give you an idea of who to call.
  • Depending on the issue and your budget, there are multiple options for waterproofing a foundation:
    • Exterior waterproofing is the most common solution and helps with all issues, especially floor dropping, cracks, and flooding. In this procedure, the ground around the house is excavated to the bottom of the foundation and a waterproof coating is put on the entire exterior foundation wall and a foundation drain 1 is installed. This procedure is lengthy and typically costs $5,000-$10,000.
    • A sump pump 2 or baseboard drain will help with leaking and seepage. This process involves adding a drain to give moisture and water a chance to drain. The cost averages $10.50-$21.00 per square foot.

Enhancement and Improvement Costs

  • While the foundation is excavated, it is possible to add additional home supports to fill in the ground to lift a drooping or uneven foundation. Costs vary largely depending on the size, condition, and age of the foundation, it could go from $2,500 up to $30,000. So better consult a contractor for a specific quote.
  • Installing gutters can move water away from the foundation and prevent a leak from occuring in the future. The average home will cost $625-$1800 to have gutters installed.

Additional Considerations and Costs

  • In most cases, homeowners choose to waterproof the basement instead of the foundation, as it tends to be less expensive, yet still effective. Basement waterproofing can often be applied from the inside, which removes the expense of excavating around the exterior foundation. Consult a waterproofing specialist to see which course of action is best for your home.

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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.
1 Foundation drain: A method of protection against water entering the basement. It runs along the footer - the structure below the basement's floor that supports a house's foundation, collecting excess water and running it through pipe into a sump or away from the house.
glossary term picture Sump Pump 2 Sump pump: A mechanical device used to remove water from wet areas such as basements and crawlspaces in order to help prevent flooding

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

Labor cost by city and zip code

Compared to national average
Albany, NY
Athens, GA
Atlanta, GA
Baltimore, MD
Buffalo, NY
Chicago, IL
Cincinnati, OH
Cleveland, OH
Columbia, SC
Columbus, OH
Dayton, OH
Decatur, IL
Dekalb, IL
Des Moines, IA
Detroit, MI
El Paso, TX
Elgin, IL
Greensboro, NC
Hammond, IN
High Point, NC
Joliet, IL
Kansas City, KS
Kenosha, WI
Lakewood, OH
Lancaster, PA
Marietta, GA
Milwaukee, WI
Minneapolis, MN
Newport News, VA
Oak Harbor, WA
Ogden, UT
Oklahoma City, OK
Phoenix, AZ
Plainfield, IL
Racine, WI
Reno, NV
Riverside, IL
Roanoke, VA
Saint Louis, MO
Seattle, WA
Smyrna, GA
South Bend, IN
Southfield, MI
Springfield, IL
Taylor, MI
Washington, DC
Waterloo, IA
West Haven, CT
Labor cost in your zip code
Methodology and sources