Septic System Installation in Shelby County
A new or replacement system in Shelby County starts with a soil test and a permit — not a shovel.
Installing a septic system is the largest-ticket job a septic owner faces, and the design is dictated by your land: soil type, how fast it percolates, and how high the water table sits all decide what system you're allowed to build and what it costs.
Every legal install begins with a site evaluation and a county permit. The output of that evaluation — conventional drainfield, engineered mound, or an aerobic/nitrogen-reducing unit — is what drives the final price far more than the tank itself.
Local ground is the deciding factor in Shelby County: High seasonal water tables drown conventional fields and force raised or pressure-dosed designs; floodplain siting often blocked or requires fill and setbacks And the rules here matter — floodplain and high-water-table siting commonly requires fill pads, mounds, or low-pressure pipe systems, which can raise the cost of a new system considerably.
How a septic installation works
- Site & soil evaluation. A licensed evaluator or engineer tests percolation and locates the seasonal high water table to determine what the soil can handle.
- System design. The system is sized to your soil and the number of bedrooms, and the type is chosen — conventional, mound/filled, or aerobic.
- County permit. Plans are submitted to the county health department for an OSTDS construction permit before any work begins.
- Tank and drainfield install. The tank is set and the drainfield is built to spec, with fill brought in where the water table requires elevation.
- Final inspection. The county inspects the open system and signs off before it's covered and put into use.
- System type — conventional vs. mound vs. aerobic/nitrogen-reducing
- Soil and water table (high water tables require expensive fill)
- Drainfield size, which scales with bedroom count
- Permit and engineering/site-evaluation fees
- Site access and how much excavation is needed
- Tank material and capacity
- Use a licensed Registered or Master Septic Tank Contractor
- Make sure they pull the county permit (never skip it)
- Insist the design matches your soil/site evaluation
- Get the warranty and final county approval in writing
30 septic system installation providers in Shelby County
License-verified contractors (active state license) are listed first.
4 Seasons Contracting
Verified · Lic. 18233AA Land Development
Verified · Lic. 14833ABES Contracting, LLC
Verified · Lic. 19274Adriel
Verified · Lic. 14350AJ Septic Service
Verified · Lic. 11401All About Septic
Verified · Lic. 13320All-Brite, Inc.
Verified · Lic. 840Allen Plumbing and Septic
Verified · Lic. 13157Anthony Brown
Verified · Lic. 19458B&M Dirtworks
Verified · Lic. 12723B&R Farms
Verified · Lic. 13842Bish Thomas
Verified · Lic. 18305C and J construction
Verified · Lic. 14045Carson Lewis
Verified · Lic. 19247Choates air conditioning and plumbing
Verified · Lic. 18248Choates Air Conditioning Heating & Plumbing
Verified · Lic. 18176CORE PLUMBING AND CONTRACTING LLC
Verified · Lic. 18990Cornerstone Ground Solutions
Verified · Lic. 19400D & D Excavating LLC
Verified · Lic. 13778D Squared Rentals LLC.
Verified · Lic. 19412D4 Construction
Verified · Lic. 14279Draingo, LLC
Verified · Lic. 993Dylan Walls
Verified · Lic. 14919Evolution Maintenance Inc
Verified · Lic. 13456Faulkner Excavating
Verified · Lic. 11593Gunn Homes
Verified · Lic. 12544Guy's Septic
Verified · Lic. 1005Hardin and Son
Verified · Lic. 19333Hardin and Son II
Verified · Lic. 8610Septic System Installation in Shelby County — FAQ
What does a new septic system cost in Shelby County?
Conventional systems commonly run from several thousand dollars to well over $10,000; mound and nitrogen-reducing systems cost more. Soil and water-table conditions in Shelby County are the biggest cost driver.
Do I need a permit to install a septic system in Shelby County?
Yes. Permits are issued by the Local authorized agent / county health department in Shelby County, under Tennessee Department of Environment and Conservation (TDEC), Division of Water Resources., and the system must pass inspection before use.
How long does an installation take?
Once permitted, the install itself is often 1–3 days, but evaluation and permitting can add weeks. Plan ahead.