Septic tank service costs depend on your project and location. Check with a local pro for your specific job.
Septic tank pros in St. Louis, MO, charge $62 to $71 per hour.
Tank size, determined by the number of bedrooms, is the greatest cost factor.
If yard regrading is required, expect to add $950 to $3,140 to the project cost.
Local septic pros in St. Louis, MO, know how to properly address risk factors associated with the city's soil type.
The average cost to replace a septic tank in St. Louis, MO, is $5,706, with costs ranging from $4,755 to $11,412. The soil type in St. Louis, MO, is silty clay, which is prone to compaction. This can cause poor drainage and water retention, leading to soil erosion. Septic pros in the area are skilled at designing drainage fields and recommending the best materials to mitigate these risk factors. If you're ready to upgrade your septic tank, consider these cost factors when budgeting for your project.
Tank size is the biggest factor in the cost to replace a septic tank in St. Louis, MO. The required tank size is determined by home size, specifically the number of bedrooms. In addition, tank material factors into cost. For example, fiberglass tanks are more expensive than concrete or plastic septic tanks. Any demo work or clean up will add to the total project cost.
The septic tank size you need depends on the number of bedrooms your home has. For a three- or four-bedroom home, you’d need a 1,000-gallon septic tank, which costs $855 to $1,430 for the tank alone.
Larger houses have more sinks, toilets, bathtubs, and other wastewater sources that flow into the septic tank. As tank size increases, so do costs.
| House Size | Tank Size (Gallons) | Average Cost |
|---|---|---|
| 1 bedroom | 500 | $475–$855 |
| 2 bedroom | 750 | $665–$1,200 |
| 3–4 bedrooms | 1,000 | $855–$1,427 |
| 5–6 bedrooms | 1,200 | $1,140–$1,520 |
| 6–7 bedrooms | 1,500 | $1,430–$2,380 |
Septic tanks are commonly made of plastic, concrete, or fiberglass, with fiberglass often being the most expensive. Here’s how much a tank costs based on its material.
| Material | Average Cost |
|---|---|
| Plastic | $475–$1,900 |
| Concrete | $665–$1,900 |
| Fiberglass | $1,140–$1,900 |
Call a pro with any questions you have about your system, even if they're general questions. The more informed you are about your system, the better it will work and the better that pros can help you with it.
Replacing a septic system often involves excavation and clearing trees or roots. Since excavation can be a messy work, many homeowners add sod over their yards or even regrade their yards at the end of a septic tank replacement for a finished look.
| Prep Work | Average Cost Range |
|---|---|
| Excavation | $1–$5 per square foot |
| Tree/root removal | $190–$1,900 |
| Sod installation | $1–$2 per square foot (including labor) |
| Yard regrading | $950–$3,140 |
Hourly rates for septic tank pros in St. Louis, MO, range from $62 to $71, on average. The fee for installing a septic tank in St. Louis County is $284, which includes a $96 permit fee and $188 for up to four septic inspections. Individual septic inspections cost around $50. Local pros can help you obtain all necessary permits. Additionally, a pro can help determine the type of septic tank your home needs.
New septic tanks can increase home value. On average, homeowners nationwide enjoy a 5% to 10% increase in value. Upgrading your septic system gives you a competitive advantage in the market and shows potential buyers that the home is well-cared for. This delivers much-needed buyer confidence.
To help homeowners plan their next project, Angi provides readers with carefully researched cost data and upholds strict editorial standards. We start with national average project costs, which we collect by analyzing competitor information, retailer material costs, and input from professional contractors. We then apply local price index data to calculate location-specific estimates that reflect what homeowners typically pay in their local area. To do that, we use data from the U.S. Bureau of Economic Analysis (BEA), including its Regional Price Parities (RPPs), which measure price differences across cities. This helps us account for differences in labor, materials, and overall cost of living, so estimates in higher- or lower-cost areas better reflect real-world local pricing.
Every estimate undergoes a thorough editorial review to verify accuracy, consistency, and alignment with observed market conditions.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
Al did a great job on our tub to shower conversion. Recommended by friends, he worked with RSI and Hoffman Plumbing to prepare an estimate, was very thorough and conscious of our budget. Working in tight space of our 4th floor condo, Bobby managed the demolition and disposal with minimal...
Had some roots in our lateral sewer main. They were very thorough and prompt with the work they performed. I would definitely recommend them to others.
Express Services Plumbing LLCThey were great gentlemen with their approach to my emergency situation I had after this party , they came in clean to clean I highly recommend this company.
Highly recommend! I had a sewer backup caused by the water companies contractor. Their insurance sent a crew and made a mess. I called Allied, and Will came out and was very honest and helpful. He worked with the insurance company and advocated for me to have the mold and asbestos removed the...
Allied EnvironmentalThis company is absolutely amazing ! Our neighbors highly recommended them to us & we are so glad they did! Not only were they prompt & reliable but they were very thorough & more than competitive! They gave us options & got the job done! They also checked in with us later to...
Diagnostic Heating & Cooling LLCCiro and his crew are the best! They showed up on schedule, did an incredible job of extending our driveway, and left the area clean. Very professional every way. We will be using them again.
CM RemodelingThis job does not match categories. We needed a pipe removed from the 1st floor bathroom and the natural gas pipe to the upper floors removed and capped. The service was excellent and the attention to detail and our specific needs was perfect. John got the job done rapidly and cleaned up the...
Weather Tight Interior An ExteriorTriple D's prices were very fair and Mr. Smith kept the scheduled appointments. He answered all of my questions. Smith was professional and respectful of my property and told me how to protect vulnerable parts of the wiring for the AC unit. Highly recommended
Triple D General Contracting, LLC1)immediate response to my online search 2) quoted great price for higher end equip w/better warranty 3) very knowledgeable about water heaters 4) replaced my 12 yr old WH in 2 hrs from his call back 5) thoroughly discussed specifics w/woman homeowner 6) checked whole house main water line...
Anytime Plumbing ServicesShowed up, fixed the leaky tank to bowl seal, works great now. <br />
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