How Much Does Septic Tank Installation Cost in Georgia?
National cost guides put a new conventional septic system at about $3,000 to $8,500, installed. That covers a septic tank and a gravel drain field, with the labor. One guide’s 2026 data puts the national average at $8,016 across all system types. On wet or poor soil, a mound or an aerobic unit can run $10,000 to $50,000 or more.
These are market numbers, not our price list. In Georgia, the county health department decides which design a lot can take. The soil and the water table decide the design, and the design sets much of the price. Southern Grind Solutions handles septic tank installation around Broxton for new houses and mobile homes.
What do national cost guides say a new septic system costs?
A conventional system sends liquid from the tank into gravel trenches. A chamber system swaps the gravel for plastic chambers. Mounds and aerobic units are for wet or poor soil.
| System type | One national guide (2026 data) | A second national guide |
|---|---|---|
| Conventional tank and gravel drain field | $3,000 to $8,000 | $3,500 to $8,500 |
| Chamber drain field | $5,000 to $12,000 | $4,000 to $11,000 |
| Mound | $10,000 to $20,000 | $25,000 to $50,000 or more |
| Aerobic treatment unit | $10,000 to $20,000 | $20,000 to $40,000 or more |
Labor makes up 50 to 70 percent of the total in the first guide. Two guides put a system for a mobile home at about $3,000 to $5,000 installed. Georgia’s state manual covers chamber and mound designs too.
How big a septic tank does Georgia require?
Georgia sizes the tank by the number of bedrooms. The Georgia Department of Public Health’s rules call for 1,000 gallons for one to four bedrooms. Each bedroom over four adds 250 gallons. A garbage disposal raises the size by half. The tank must have two compartments and a filter on the outlet.
| Bedrooms | Georgia’s minimum tank | Tank-only price in national guides |
|---|---|---|
| 1 to 4 | 1,000 gallons | $900 to $1,500 |
| 5 | 1,250 gallons | $1,200 to $1,800 |
| 6 | 1,500 gallons | $1,500 to $2,500 |
| 1 to 4, with a garbage disposal | 1,500 gallons | $1,500 to $2,500 |
Delivery and installation come on top of those tank prices.
What drives the price on your lot?
How high does the water table rise?
State rules set a floor for conventional and chamber systems. The seasonal high water table must sit at least 24 inches below the trench bottom. With an aerobic unit that cleans the wastewater to the state’s Class I level, the rules allow 12 inches.
Coffee County has both dry and wet ground. The federal soil survey maps well-drained loamy sand on the higher ground. It also maps poorly drained flats and creek bottoms. There, the water table can rise to within about six inches of the surface. A lot on a wet flat may need a mound or an aerobic unit, and the price climbs.
How fast does the soil drain?
Georgia’s manual sizes the drain field from the bedroom count and how fast the soil takes water. It lists 125 square feet of trench bottom per bedroom in fast soil, at 5 minutes per inch. Slow soil, at 60 minutes per inch, needs 335 square feet per bedroom. For a three-bedroom house, that is 375 square feet against 1,005, nearly three times the trench.
On lots under 3 acres, soil slower than 90 minutes per inch rules out a conventional system. The state manual also calls for at least 12 inches of gravel in each conventional trench.
What does the site need?
The tank truck and the excavator need a clear way in, and brush has to come off the work area. One national guide lists land clearing at $1,200 to $4,800 as an extra.
State rules keep the tank 50 feet from a well and the drain field 100 feet from one. The lot also needs open ground for a full replacement field. When the whole lot needs work, site preparation for a new house or mobile home can include the septic system.
The state manual says drain fields must be protected from storm water. Ditches or a culvert that move water off the lot fall under excavation and dirt work.
What do the permit and the soil work cost?
One national guide budgets $450 to $2,300 for septic permits, though it notes some places charge less. Guides list $250 to $2,000 for soil and percolation testing. The South Health District posts its fees for Tift, Lowndes, Ben Hill and Irwin counties. Each lists $120 for a new site evaluation and $120 for a new septic permit, inspection included. That is $240 for a new system. Another inspection trip on a faulty install adds $120.
Coffee County sits in the Southeast Health District, so call the Coffee County Health Department in Douglas for its fee. Lots in a new subdivision or lots with fill can also need a private soil classifier’s report.
What are the county permit steps in Georgia?
No one may start building on a lot that will use septic before the county issues a construction permit.
- Apply. The application goes to the county health department with the bedroom count and a sketch of the lot. The Southeast Health District covers Coffee County. Its standard form asks if the house site is staked and cleared. An unstaked site can bring a reevaluation fee.
- Site evaluation. The county checks the soil and the water table. It has 20 days after a complete application to approve or deny it.
- Permit. A construction permit is good for 12 months.
- Locate request. Georgia law requires a Georgia 811 locate request before mechanized digging. Georgia 811 asks for it at least 3 business days ahead.
- Install. The tank goes in level, and the lines go in true to grade. The state manual bars digging drain field trenches in wet soil other than sand.
- Final inspection. Nothing gets covered until the county inspects the system and approves it in writing. Grading or filling over it later can void that approval.
What should you know before you get a quote?
- Count bedrooms, and decide on a garbage disposal now. Both change the tank size.
- Keep buildings, pavement, parking and traffic off the drain field area, as state rules require.
- Ask what the quote covers: the tank, the lines and gravel, backfill and rough grade, and the permit fee.
- The state manual advises pumping the tank about every three to five years. A septic pumping company, permitted by the county, does that work.
- Setting a mobile home? Coffee County checks for an approved septic tank or sewer system before the home is occupied. Plan the pad and the septic system as one site job, and see what Georgia expects under a mobile home.
How do you get a written quote for a new septic system?
Southern Grind Solutions installs new septic tanks and drain fields about 80 miles around Broxton, Georgia. The work covers the dig, setting the tank, the drain field lines, backfill and rough grade. Pumping and repairs go to other companies.
We look at the job and put the quote in writing. Our page on new septic tanks and drain fields around Broxton covers the work. Call or text (912) 381-6261.