1St Property Services LLC
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Cobb County, GA · Septic System Installation
Septic System Installation in Cobb County
A new or replacement system in Cobb 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 conditions in Cobb County
Local ground is the deciding factor in Cobb County: Upland siting is workable, but the clay — not the water table — is the binding constraint. Bottomland lots near streams can fail on wetness. And the rules here matter — counties like gwinnett, cobb, and fulton run active environmental health offices with online permit portals and as-built records, 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.
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 Cobb County
License-verified contractors (active state license) are listed first.
A. Wagner Plumbing
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
D & D Backhoe
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Drake Excavating
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Eddie Hayes
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Elite Realty Services, Inc.
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Ennis Grading & Under Ground Utilites LLC
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
George's Septic Service
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Gibbs Septic Services LLC
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Gibbs Trucking dba Gibbs Septic & Sewer
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Hancock Grading and Hauling
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Heritage Plumbing - Talking Rock
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Independent Septic and Sewer LLC
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Innovative Plumbing, Inc.
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Integrated Plumbing Solutions, LLC
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Pumper · GA DPH · verified 2026-06-25
J. Chambers Septic
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Jerry Heard Services, LLC
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Johnson Plumbing, Inc. - Canton
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Kacey Carter Enterprise LLC
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Kenneth Black Plumbing, LLC
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Ledford Grading Services LLC
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Masterflo Plumbing
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Maxis Engineering, LLC
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Nabor Plumbing Inc
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
ND Plumbing, LLC
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
North Ga. Grading
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
OX Septic Services LLC
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Papa's Septic Service
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Pumper · GA DPH · verified 2026-06-25
Performance Plumbing, Inc.
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Precision Plumbing and Septic INC
Verified · GA DPHMarietta, GA
Septic Tank PumpingSeptic RepairSeptic InspectionSeptic System Installation
GA DPH Certified Installer · GA DPH · verified 2026-06-25
Septic System Installation in Cobb County — FAQ
What does a new septic system cost in Cobb 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 Cobb County are the biggest cost driver.
Do I need a permit to install a septic system in Cobb County?
Yes. Permits are issued by the Local authorized agent / county health department in Cobb County, under Georgia Department of Public Health (DPH), Environmental Health Section., 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.