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Sullivan County, TN · Septic System Installation

Septic System Installation in Sullivan County

A new or replacement system in Sullivan County starts with a soil test and a permit — not a shovel.

See 30 verified pros

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 conditions in Sullivan County

Local ground is the deciding factor in Sullivan County: Steep terrain causes effluent to surface or move laterally; karst valleys (Knox/Hamilton) carry the same fracture-flow contamination risk as Middle TN And the rules here matter — slope limits (commonly no systems on slopes steeper than ~25%) frequently force alternative designs or block construction, which can raise the cost of a new system considerably.

How a septic installation works

  1. Site & soil evaluation. A licensed evaluator or engineer tests percolation and locates the seasonal high water table to determine what the soil can handle.
  2. System design. The system is sized to your soil and the number of bedrooms, and the type is chosen — conventional, mound/filled, or aerobic.
  3. County permit. Plans are submitted to the county health department for an OSTDS construction permit before any work begins.
  4. 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.
  5. Final inspection. The county inspects the open system and signs off before it's covered and put into use.
What drives the cost
  • 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
How to choose a pro
  • 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 Sullivan County

License-verified contractors (active state license) are listed first.

3D Landworks/ Joshua Davis

Verified · Lic. 19312
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

4 Seasons Contracting

Verified · Lic. 18233
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

A & R Backhoe

Verified · Lic. 13062
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

A and P Excavating and Materials

Verified · Lic. 11723
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

A Plus Plumbing Inc

Verified · Lic. 146
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

A&B Kern Septic Service

Verified · Lic. 13733
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

A&S Sanitation, Inc

Verified · Lic. 155
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Pumper · TN TDEC · verified 2026-06-25

AA Land Development

Verified · Lic. 14833
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Action Excavating and Land Clearing

Verified · Lic. 19019
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Adriel

Verified · Lic. 14350
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

AKR Rice

Verified · Lic. 1080
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Alex gibson

Verified · Lic. 19576
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

All Out Hardscaping

Verified · Lic. 19246
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

All Season Lawn and More llc

Verified · Lic. 18122
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

All Seasons Lawncare & Landscaping

Verified · Lic. 13155
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Allen's excavating and construction

Verified · Lic. 10515
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Alpha Industries

Verified · Lic. 19433
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Appalachian Works

Verified · Lic. 19126
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Appetite For Construction

Verified · Lic. 18502
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Arc

Verified · Lic. 14064
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

AT Sitework, LLC

Verified · Lic. 14065
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Atkins hauling and excavation

Verified · Lic. 19188
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

B & R CONSTRUCTION

Verified · Lic. 10617
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

B&B Construction

Verified · Lic. 14346
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Baileys Land Service

Verified · Lic. 19018
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Barkley Lumber Company, INC.

Verified · Lic. 1609
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Barrett’s excavating

Verified · Lic. 19061
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Big Ben Enterprise LLC

Verified · Lic. 18403
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Billy Stout & Sons Excavating

Verified · Lic. 13509
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25

Blake Stout Construction

Verified · Lic. 10324
Blountville, TN
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
Installer · TN TDEC · verified 2026-06-25
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Septic System Installation in Sullivan County — FAQ

What does a new septic system cost in Sullivan 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 Sullivan County are the biggest cost driver.

Do I need a permit to install a septic system in Sullivan County?

Yes. Permits are issued by the Local authorized agent / county health department in Sullivan 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.

Other services in Sullivan County

Emergency Septic ServiceSeptic RepairSeptic Tank PumpingSeptic Inspection

Septic System Installation in nearby counties

Blount CountyBradley CountyDavidson CountyHamilton CountyKnox County