The septic permit gates your building permit and your certificate of occupancy. We treat it that way, and we bring it into the schedule at design rather than at framing.
Two things matter to a builder on septic: does it pass, and does it hold up the schedule. As a Tier 3 installer in South Carolina we may self-inspect our own installations, which removes an inspector from your critical path entirely. In Georgia we schedule the mandatory county inspection and plan around it rather than discovering it. And on tight lots we can install engineered systems most contractors legally cannot.
Georgia rule is explicit: no person may begin the physical development of a lot where an on-site sewage system will be used without first obtaining a construction permit. Not before the system goes in. Before the lot is developed. We see people clear and grade first and find out afterwards. In South Carolina the sequence is friendlier, but the site evaluation is still the long pole and it can't be compressed once you're behind.
The soil evaluation decides this, and finding out at the point of permitting rather than at the point of land acquisition is expensive. If you're buying lots to develop, get the soils looked at before you close on the parcel, not after.
| South Carolina | Georgia | |
|---|---|---|
| Permit valid | 5 years | 12 months |
| Decision window | Driven by evaluation scheduling | 20 days from complete application |
| Final inspection | Tier 3 may self-inspect | County, mandatory, before backfill |
That five-year versus twelve-month difference is the single most useful thing on this page if you're phasing lots. A South Carolina permit survives a slow market. A Georgia permit does not.
Both states: 1,000 gallons minimum for up to four bedrooms, plus 250 gallons per bedroom above four. Georgia additionally requires two-compartment tanks with the first at least two thirds of liquid capacity, an approved outlet filter, minimum 24-hour retention, and 50 percent additional capacity where a garbage grinder is installed. That last one catches builders who spec disposals as standard.
Also plan for the repair area: South Carolina requires at least 50 percent of the original system size held in reserve. On a tight lot, that reserve is often what decides whether the plan fits.
The most valuable call you can make to us is the one before you buy the parcel. SCDES states plainly that not all property is suitable for a septic system. A soil evaluation costs a fraction of what an unbuildable lot costs.
Tell us about the property and what it's doing. We'll come look, tell you straight what it needs, and give you a number you can plan around.