Top-rated septic system installers and replacers.

Get matched with top septic system installers and replacers in Saint-louis, MO

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Top-Rated Septic system installers and replacers in Saint-louis - Updated Nov 2026

A & M Septic and Excavating, LLC
3.9(
33
)
Septic System - Install or Replace

Serving Saint-louis, MO and surrounding areas

Approved

In business since 2003

Free estimates

Customers say: Quality work

"My septic alarm went off last week on one of those 10 degree nights , so I called Matt at A & M septic next day. Matt sent out a knowledgeable and professional crew the next day (bitter cold again) to diagnose and fix the issue. They were done in a couple hours, and my septic is working great. Matt was easy to deal with, professional, and prompt to respond. His crew explained the issues to me and quoted me a price before they started. I highly recommend A & M for your septic system repairs. Thank you Matt and Crew!"
Septic pump fix
New pump and line
Lagoon clean up
Lagoon clean up
Water proof riser

+5

Response time2 days
22 neighbors recently requested a quote
Recommended by72%of homeowners
Avatar for HS Sewer and Drain
HS Sewer and Drain
4.9(
7
)
Septic System - Install or Replace

Serving Saint-louis, MO and surrounding areas

In business since 2011

Free estimates

Emergency services offered

HS Sewer and Drain is proud to provide homeowners, realtors, and commercial businesses with quality plumbing service since 2011! With years of experience, our service professionals have the knowledge, tools, and resources to handle all of your sewer and septic needs! Whether your problem arises during the day, at night, on a weekend, or even over the holidays, you can rest assured that HS Sewer & Drain will arrive and get your plumbing back in order. From septic systems to sewer mains, we can do it all in a safe and timely manner. If your plumbing is clogging up your time then don't try and figure it out yourself- let the pros give you a hand! Give us a call today!

New riser and lid
Exposing buried lid
100' sewer line replacement
100' Sewer Line Replacement
Finished Grade

+19

Response time30 mins
Recommended by100%of homeowners
Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,689
)
Septic System - Install or Replace

Serving Saint-louis, MO and surrounding areas

In business since 1971

Credit card accepted

"I just pay $75 you never know who's going to come out. They do everything electrical. Just about everything is covered except the septic tank. I had an air conditioner replaced. It went great, all I had to do was pay for the freon. He didn't charge e more than what was needed."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+2

Recommended by65%of homeowners
Avatar for Reed's 24 Hr Plumbing & Drain LLC
Reed's 24 Hr Plumbing & Drain LLC
2.8(
5
)
Septic System - Install or Replace

Serving Saint-louis, MO and surrounding areas

In business since 2005

Emergency services offered

Credit card accepted

Reeds 24he Plumbing is a Licensed, Bonded, and Insured company open 24 hour 7 day a week. We are here to help you day and night. Building our reputation on honesty, integrity and quality of workmanship. Our goal is to give you top quality full-service 24 hour plumbing solutions with LOW competitive pricing. We have licensed experienced technicians always on call. the owner himself has over 25 years of plumbing experience. Reeds 24hr Plumbing vows to exceeds the expectations of our customers by providing you straight forward pricing from the start with NO hidden costs.\n\nAlso services St Louis, Warren & Washington Counties

Recommended by66%of homeowners
Avatar for BLE Construction
BLE Construction
5.0(
1
)
Septic System - Install or Replace

Serving Saint-louis, MO and surrounding areas

In business since 2021

Free estimates

Emergency services offered

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Response time10 mins
Recommended by100%of homeowners
FAQs for septic system installation and replacement projects in Saint-louis, MO

Most septic system replacements require several days to complete, not including permitting and preparation time. The process begins with site assessment and testing, followed by excavation, component installation, and final inspection. Weather conditions, property accessibility, and inspection schedules can all affect your project timeline. Your contractor can provide a more specific estimate based on your property's unique characteristics.

Standard homeowners' insurance policies don't cover septic system replacement due to age or normal deterioration. Coverage may apply if damage results from specific covered events, but routine maintenance and eventual replacement are generally considered homeowner responsibilities. Review your policy details or speak with your insurance agent to understand your specific coverage limitations.

Look for multiple indicators such as slow-draining fixtures, unusual gurgling sounds in plumbing, sewage odors inside or outside your home, or wet spots in your yard. Unusually lush grass over the drain field area, frequent backups, or recurring repair needs might signal system failure. Addressing these warning signs promptly can prevent property damage and health hazards.

DIY septic installation is not recommended and may violate local regulations. Professional installation ensures compliance with health codes, proper design for your specific site conditions, and appropriate safety measures. The specialized equipment, technical knowledge, and permitting requirements make this a job best left to licensed professionals who can guarantee the system's safety and effectiveness.

With proper maintenance, including regular pumping, a drain field lasts 20 years. Various factors influence system longevity, including household size, water usage patterns, and soil conditions. Regular professional inspections can help determine when replacement becomes necessary. If your system requires increasingly frequent repairs, replacement might be more economical than continuing to address individual problems.

The Saint-louis, MO homeowners’ guide to septic system installations and replacements

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