Dorchester · Berkeley · Charleston counties
Septic Tank Replacement in Summerville, SC
Start with the property. A house, a rental, a new build and a restaurant are four different jobs with different paperwork, different money and different deadlines.
- 12–24"
- Wet-season water table
- 1,000 gal
- Minimum tank, up to 4 bedrooms
- SCDES
- Permits since July 2024
Start with what you own
Not sure which of these you are? Tell us the address and we will work it out.
The water table decides this, not you
Everything about septic work in this part of South Carolina comes back to one measurement: how far the ground water sits below your yard in a wet month. Across Dorchester and Berkeley counties that seasonal high sits roughly twelve to twenty-four inches down. A conventional drain field needs clean separation between the bottom of the trench and that water, and when the separation is not there the effluent has nowhere to go but sideways and up. That is why the wet green stripe across a lawn is the most common thing we get called about, and why two houses on the same street can need completely different systems. The auger settles it. Nothing else does.
Permits come from SCDES now, not DHEC
On 1 July 2024 responsibility for onsite wastewater permitting in South Carolina moved from DHEC to the new Department of Environmental Services. The regulation itself, R.61-56, did not change, and neither did the arithmetic: a house of four bedrooms or fewer needs a minimum thousand-gallon tank, with another two hundred and fifty gallons for every bedroom above that. What did change is who you file with and where the site evaluation gets scheduled. Anyone still telling you they will "call DHEC" has not pulled a permit in this county in two years. We file, we meet the evaluator on site, and the permit and soil work is part of the job rather than something handed back to you.
The work itself
- Septic tank replacement Setting a new tank and decommissioning the old one
- Failing drain field The wet green stripe, and what it costs to fix
- Septic tank repair Lids, baffles, risers and distribution boxes
- Septic inspection for a sale The report a lender, buyer or agent will accept
- Permits and soil evaluation Borings, the water table, and the SCDES application
- Pumps and lift stations When the field sits uphill of the house
- Sewer lines and laterals The pipe between the house and everything else
What does a system actually cost here?
Ranges for evaluation, tank, field, full replacement and inspection, with what moves each one.
How a replacement actually runs
Site evaluation
Soil borings, water-table reading, setbacks from wells, property lines and the house measured on the ground.
System sizing
Bedrooms and soil loading rate decide tank volume and trench length. This is arithmetic, not opinion.
Permit filed
Application and site plan to SCDES, and we meet their evaluator when they come out.
Install
Old system decommissioned properly, new tank set and plumbed, field trenched, gravel and pipe laid, distribution box levelled.
Inspection and cover
Open-trench inspection passed before anything is backfilled, then graded, seeded and strawed.
What actually gets replaced
A septic system is two pieces of unequal cost. The tank is a concrete box that holds solids and it rarely fails outright — it cracks, its lid rots, its baffle drops, its riser leaks. The drain field is the part that does the work and the part that dies, usually because a biomat has sealed the trench bottom or because the water table has risen to meet it. Homeowners ring us about the tank because that is the part they can see. Nine times in ten the estimate ends up being about the field.
Where the ground makes this expensive
Summerville grew outward fast, and a lot of that growth sits on flat sandy ground with a shallow clay layer under it that stops water moving down. Add a wet spring and a full field has nowhere to drain. In those situations the county will not approve a like-for-like replacement, and the answer is a mound or a dosed low-pressure field that puts the trench above the water rather than in it. Those cost more and they take more yard. We would rather tell you that at the estimate than after the excavator is parked on your lawn.
When the answer is the sewer
Parts of Summerville, Ladson and Goose Creek have had sewer brought past them in the last decade. If a main is in your street, tying into it is sometimes cheaper than replacing a failed field and it is always cheaper over twenty years. We check before quoting a replacement, and where a connection is available and sensible we will say so and quote the lateral instead. Selling somebody a twenty-thousand-dollar system they did not need is how a contractor gets one job in a town rather than a hundred.
Septic work across the Lowcountry
Beyond Summerville we cover septic tank replacement in North Charleston, Goose Creek septic tank replacement calls, serving Hanahan, septic tank replacement for Moncks Corner property owners, Ladson, septic tank replacement in Walterboro, Saint George septic tank replacement calls, serving Ridgeville, septic tank replacement for Lincolnville property owners, Harleyville and septic tank replacement in Bonneau, and the rural roads in between.
Tell us about the property
Property type, address and what you are seeing. Evaluations are usually booked within a few working days.
Rather talk it through? 843-555-0164
Mon–Fri 7am–6pm · Saturday mornings · emergency backups answered outside those hours