4.3 
751 *The Angi rating for Sump Pump Installation companies in O Fallon, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Sump Pump Installation needs.
*The HomeAdvisor rating for Sump Pump Installation companies in O Fallon, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Sump Pump Installation needs.
Last update on July 16, 2026
Serving O Fallon, IL and surrounding areas
Approved (Corporate)
In business since 1935
Free estimates
Emergency services offered
"It was expensive but fine. The plumber was very nice."
+1
Serving O Fallon, IL and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1992
Free estimates
Warranties offered
"My installers were very helpful and answered all of my questions"
+16
Serving O Fallon, IL and surrounding areas
Approved (Corporate)
In business since 1993
Free estimates
Emergency services offered
"Very professional and knowledgeable....and polite as well, Thank you!"
+5
Serving O Fallon, IL and surrounding areas
Approved
In business since 2020
Free estimates
"They did a really good job waterproofing my basement. The crew was professional, arrived on time, and explained the entire process before getting started, and completed the job with great attention to detail. It's clear they take pride in their work. I'd definitely recommend them if you need your basement waterproofed."
+6
Serving O Fallon, IL and surrounding areas
Approved
In business since 2023
Free estimates
Emergency services offered
"This is the best company I would highly recommend. They arrive quickly and were very clean due the install!"
Serving O Fallon, IL and surrounding areas
Approved
In business since 2021
Free estimates
"SBK was able to come and grade part of my lawn that was messed by plumbing issues. He was extremely professional and able to get it done the next day!"
+5
Serving O Fallon, IL and surrounding areas
Approved
I am a licensed plumber in Illinois looking to start a company
Serving O Fallon, IL and surrounding areas
Approved
Hello, my name is James. I perform many handyman/repair services. I won’t charge near as much as large commercial businesses, and promise to be transparent and honest with my work. I’m positive if I can’t help you with your problem then I could point you in the right direction to help get your issue resolved asap quick as possible.
Serving O Fallon, IL and surrounding areas
Approved
Property manager with 25 years experience fixing thing that break. Plumbing and electrical repair.
Serving O Fallon, IL and surrounding areas
In business since 2005
Free estimates
Emergency services offered
"They could not find the source of the leak and neither could I. The team was professional and kind. I would gladly contact ALLN1 again."
+39
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