Basement problems we take requests for
Request a free estimate from a local pro
From request to inspection
- Fill in the short form with your town and the problem.
- We pass it to an independent contractor who works in that part of Dane County.
- The contractor visits, finds the source of the water and gives you a written price.
- You hire, or don't, directly with them.
Groundwater and Madison basements
City of Madison Engineering says many older areas of Madison were built on "made land." These are old wetlands or low areas that were filled so homes could be built. Average yearly rain and snow has risen about 3 inches over the last 20 years, per the city. In many of those areas the groundwater table now reaches basements, and some sump pumps run around the clock. (Source: City of Madison Engineering, Sump Pumps.)
Madison Engineering explains basement seepage with a boat hull picture: the basement sits in wet ground, and water looks for a way in. The floor is a floating slab that is not tied to the walls, so the seam where they meet is the usual entry point. The city says homes in areas with high groundwater see this during routine rain or even in dry weather (City of Madison Engineering, Sump Pumps).
Groundwater can stay high long after a wet spell. City of Madison Engineering notes that after the city's last long stretch of high lake levels (August 2007 to August 2008), it took about another year for groundwater to drop back to normal (City of Madison Engineering, Sump Pumps). Pumps that run all year can also ice a curb or gutter in winter.
Price ranges
Angi's 2026 national figures: a typical waterproofing job averages $5,247, and most fall between $2,461 and $8,207. A sump pump install averages about $1,100. The method, the length of wall and the cause of the water move the number most. For a bowing or horizontally cracked wall, read foundation repair first.
Madison-area towns
Madison basement questions
Are you a waterproofing company?
No. Madison WI Basement Waterproofing is a referral service. We pass your request to an independent basement contractor who works in the Madison area, and that company does the inspection and the work.
Is there a charge to send a request?
No. Sending a request is free. Inspections and prices come from the contractor, so get a written quote before you agree to work.
Water is coming in right now. What do I do?
Stay away from water near outlets, appliances or the electrical panel and call your electric utility or an electrician. If it's safe, check that the sump pump is running and its hose isn't frozen or blocked, then send a request marked as urgent.
How do I vet a contractor?
Ask for proof of insurance and a written scope that names the method, the length of drain tile and where the pump discharges. Get warranty terms in writing and read reviews yourself.
Where can my Madison sump pump discharge?
Not to the sanitary sewer or a floor drain. City Engineering lists the yard, a storm sewer within about 100 feet, the curb, or an infiltration bed. A storm sewer hookup needs an Excavation in the Right-of-Way Permit and a contractor qualified to work there.
Why does my Madison sump pump run all the time?
City Engineering says many older Madison neighborhoods sit on made land, filled wetlands or low spots. Groundwater there has risen as yearly precipitation went up about 3 inches over 20 years, so some pumps run around the clock.