A South Carolina septic permit, whether for an onsite wastewater system or a straight repair, starts with the state. The county has nothing to do with issuing it. Here's what the process looks like when we manage it for you.
- We contact the regional office and request a site evaluation for your address. This visit carries the state's $150 site evaluation fee.
- A soil classifier checks the ground and the setback distance from a well and property lines. During this visit, the classifier also determines what system type the lot can support.
- The agency reviews and approves the layout before issuing a Permit to Construct.
- After installation, an inspector returns for a final inspection and has to certify the work before final approval.
As of August 2026, having Rock Solid manage this whole process runs $1,500–2,500 depending on site conditions. Most of our installs show up with a permit already in hand, about 95% by Ivan's count, usually pulled by the builder or the homeowner. When there isn't one, we file the application online. You tell us where the structure and the septic system will sit, and SCDES calls to schedule the field evaluation. Then we arrive with an excavator to dig the pits the inspector asks for. After that the file waits on SCDES findings. Ivan sees a typical turnaround of 1.5 to 3 weeks, though it shifts with the office's workload (as of September 2026).
The permit sets the tank size, not the homeowner. A 1,000-gallon tank is the usual minimum, and about 80% of the systems Ivan works on are that size. Past roughly four bedrooms, a larger tank comes into play, and residential systems rarely go above 1,500 gallons. One thing to check on your own paperwork is the bedroom count. If a five-bedroom house was permitted as a three-bedroom, the system was sized for a smaller household than the one living there.