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Top-Rated Sump pump or interior foundation drains installers in Thiensville - Updated Nov 2026

Avatar for Groundworks
Groundworks
4.6(
917
)
Sump Pump or Interior Foundation Drains - Install

Serving Thiensville, WI and surrounding areas

Approved (Corporate)

In business since 1993

Free estimates

Small jobs welcome

Groundworks is the North America's leading and fastest-growing foundation repair and water management solutions provider. Groundworks is a vertically integrated company with its own manufacturing operations and a world-class software solution, allowing us to serve our customers more effectively. From the first phone call to the annual maintenance offered, our customers have peace of mind knowing we're there with one mission to repair, protect and improve their home. For state licenses visit Groundworks.com/licensing

Basement
Basement
Basement
Concrete
Concrete

+13

50 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Integrity Plumbing LLC
Integrity Plumbing LLC
4.9(
93
)
Sump Pump or Interior Foundation Drains - Install

Serving Thiensville, WI and surrounding areas

In business since 2009

Free estimates

Small jobs welcome

"Jim is now “my guy” for any plumbing needs. I was very impressed with both the quality of the work (installed utility sink in basement) and his professionalism. I would not hesitate to contact him again?"
Additional Photos
Response time9 hrs
Response rate100%
Recommended by92%of homeowners
Avatar for JJB Home Improvements LLC
JJB Home Improvements LLC
4.7(
183
)
Sump Pump or Interior Foundation Drains - Install

Serving Thiensville, WI and surrounding areas

In business since 1994

Free estimates

Warranties offered

"Three letters signal how it went: C C and H Competent in many different parts of home improvement and repair. Careful in all their work. It is not rushed, it is done meticulously. Honest. They will never tell you you need something done just so they can get work. If anything needs to be done, they show you pictures of it and explain it in detail, and then they give detailed items in billing."
Additional Photos
Additional Photos
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+9

Recommended by93%of homeowners
Avatar for Sullivan Exteriors
Sullivan Exteriors
4.7(
44
)
Sump Pump or Interior Foundation Drains - Install

Serving Thiensville, WI and surrounding areas

In business since 2008

Free estimates

"Great! They spent 2 days repairing a poor roofing job that lead to our leaking and a several nests of wasps invading house. They also did a great job cleaning our gutters this spring.

They will be returning next spring for another issue we need addressed.

We were very happy with this company, Ben is very easy to talk with.
"
Recommended by95%of homeowners
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FAQs for sump pump or interior foundation drains installation projects in Thiensville, WI

Most residential pumps draw approximately 1,300 to 2,900 watts when they first start, then settle at roughly 800 to 1,050 watts during normal operation. The exact number depends on the motor’s horsepower and how often the float switch tells the pump to run. Even at the high end, the electricity cost is minor compared with the expense of cleaning up a flooded basement.

Grab a ruler and an empty 18‑inch‑wide pit. During a steady rain, time how much the water rises in one minute. Multiply that depth (in inches) by 60 to calculate gallons per hour, then add 50% for safety. If the result tops 2,100 gallons per hour—about 35 gallons a minute—you’ll need a 3/4‑horsepower unit. Anything lower, and a 1/3- or 1/2-horsepower pump should do the trick.

Loud rattling, constant cycling, or shuddering vibrations are the pump’s way of telling you it’s on its last legs. Musty smells, higher electric bills, and visible rust are other red flags. If the unit is 10 years old or older and exhibits any of these symptoms, replace it before the next heavy rain turns your basement into a wading pool.

You don’t have to hire a licensed plumber, but you should still bring in someone who installs sump pumps for a living—whether that’s a plumber, basement‑waterproofing specialist, or experienced handyman. They know the local codes, can wire the pump safely, and will test the system before they leave. Skipping professional help might void the warranty and could leave you with a pump that fails when you need it most.

Not every basement needs a pump, but if your home sits in a floodplain, has a high water table, or has ever taken on water during a storm, a sump pump is inexpensive insurance. For basements that only struggle with condensation or the occasional damp spot, sealing cracks and improving drainage may be all that is needed.

The Thiensville, WI homeowners’ guide to sump pump or interior foundation drains installations

From average costs to expert advice, get all the answers you need to get your job done.