If you've been shopping rural homes in Horry County — Aynor, Loris, Galivants Ferry, the back roads off Highway 905, or the deeper pockets of Longs — odds are good the property runs on septic, not city sewer. I've watched a lot of out-of-state buyers learn this the hard way during the inspection period. It's not a deal-breaker, but it is a real piece of due diligence that I want every rural buyer to understand before they sign anything. After three decades of writing offers out here, here's what I tell people.
Why Septic Is the Norm This Far Inland
City sewer reaches only as far as the utility lines do, and in rural Horry County, that's usually not far. The infrastructure cost of running municipal sewer to a property that sits a mile off the main road just doesn't pencil out. So the home was built with its own underground treatment system — a septic tank and a drain field — and that's what you're buying.
Septic isn't a problem; it's a system. Properly designed, installed, and maintained, a septic system can run quietly for thirty years or more. Poorly maintained or undersized for the home's actual usage, it can fail in ways that are expensive and disruptive. Most of the rural homes I sell in Aynor real estate and Loris real estate are on systems that work fine, but I treat every septic-served property as a separate inspection conversation.
How a Septic System Actually Works
Wastewater leaves the house and enters a buried tank. Solids settle. Liquids flow out into a drain field, where they percolate down through the soil and get treated by the surrounding ground. The tank needs periodic pumping. The drain field needs to stay free of compaction and root intrusion. The soil needs to drain at a usable rate.
The size of the tank is matched to the number of bedrooms in the home, not the square footage. A three-bedroom home requires a smaller tank than a five-bedroom home. If a previous owner added a bedroom without permitting the septic upgrade, the system is now undersized and that becomes the buyer's problem.
The Inspection That Matters
A standard home inspection does not include a septic inspection in most cases. It's a separate scope, often called a septic dye test, septic load test, or full pump-and-inspect. The price runs roughly $300 to $600 depending on the inspector and whether they pump the tank as part of the visit.
What I want a septic inspection to confirm:
- - Tank size matches the bedroom count
- - Tank baffles and lids are intact
- - Drain field shows no surface saturation or odor
- - System handles a real water load without backing up
- - Permits and as-built drawings are on file with DHEC if the home is newer
I tell buyers to insist on this inspection even when the seller swears the system was just pumped. Pumping the tank is maintenance. Inspecting the system is diagnosis. The two are different conversations.
Real Costs Buyers Should Plan For
Maintenance: pumping a residential septic tank every three to five years runs $300 to $500. Skip it for ten years and you risk a clogged tank and a backed-up drain field, which is when costs jump fast.
Repairs: a baffle replacement might be $200 to $500. A new tank lid is similar. A new tank itself can run $2,500 to $5,000 depending on size and access.
Drain field replacement: this is the expensive one. A full drain field replacement on a typical residential lot in this market runs $8,000 to $25,000, with the upper end hitting homes in tight lots or wet soil. This is the cost that turns a routine septic into a real budget event.
Conversion to a pumped or aerobic system: if the soil doesn't perc well, a conventional gravity drain field won't work and the home needs a more complex system that uses a pump. Those systems carry higher install costs and an electric bill, plus annual service contracts.
What Affects Septic Resale Value
Buyers price septic-served homes differently than sewer-served ones, but the gap is smaller in rural areas where everyone is on septic anyway. The discount shows up most when:
- - The system is at the end of its expected life
- - The drain field shows visible issues during the inspection
- - The tank is undersized for the bedroom count
- - The home has been added onto without permitting the septic upgrade
- - The lot's soil drainage is marginal
On the other hand, a recently installed system with permitted as-built drawings and a clean inspection actually adds value because the next buyer sees it as one less unknown. I've had sellers in Longs real estate pull a clean recent septic inspection out of a file folder at closing, and the buyer's anxiety dropped immediately.
Two Things I Tell Every Rural Buyer About Septic
First, ask for the permit and as-built drawing. SCDHEC files include the original permit, the soil percolation test, and a drawing of where the tank and drain field sit on the property. That paperwork tells you what you're really buying. If it doesn't exist, the system was either installed before records, or installed without permits — and both are worth knowing before closing.
Second, walk the property after a heavy rain. If you can manage to visit a candidate house the day after a real downpour, do it. Saturated yards, soft spots over the drain field, or pooled water above the tank all tell you more than any inspection report can.
Key Takeaways
- - Most rural Horry County homes — Aynor, Loris, Galivants Ferry, deeper Longs, back roads off 905 — run on septic, not city sewer
- - Septic is a fine system when designed correctly and maintained, but tank size, drain field condition, and soil drainage all matter
- - A septic-specific inspection ($300-$600) is separate from a standard home inspection and worth insisting on
- - Routine pumping every 3 to 5 years costs $300 to $500; drain field replacement can run $8,000 to $25,000
- - An undersized tank (often from an unpermitted bedroom addition) becomes the buyer's problem after closing
- - Permitted as-built drawings from SCDHEC are the gold standard piece of due diligence
- - Walking the property after a heavy rain reveals more than any inspection report
Frequently Asked Questions
How often does a septic tank need to be pumped?
For most residential households, every three to five years. Larger households, smaller tanks, or homes with garbage disposals running heavily may need pumping more often. Tanks at vacation homes that sit unused most of the year can usually go longer.
Will a bank loan on a home with a septic system?
Yes, conventional, FHA, USDA, and VA loans all routinely finance septic-served homes. FHA and VA may require a satisfactory septic inspection as a loan condition. USDA loans, which are common in rural Horry County, also require functional septic but don't penalize the home for having it.
What happens if a septic system fails after closing?
It's the new owner's responsibility unless a specific representation or warranty in the purchase contract says otherwise. That's why the inspection during the contingency period matters. A failed system after closing isn't typically covered by the seller's disclosure unless the seller knew and didn't disclose, which is hard to prove.
Can a septic-served home be converted to city sewer?
Only if a sewer line runs near the property. Most rural Horry County parcels are too far from utility lines to make conversion practical. If sewer is available, the tap-on fee plus connection costs typically run $5,000 to $15,000 in this market, and some homeowners still choose to stay on a healthy septic rather than convert.
What is an aerobic septic system?
It's a more complex system that uses air pumps to accelerate the breakdown of waste, allowing it to function on smaller drain fields or in soils where conventional gravity systems can't drain. They're more expensive to install (often $15,000 to $25,000) and require annual service contracts, but they're the right answer on lots that would otherwise be unbuildable.
About Greg Harrelson
Greg Harrelson is a seasoned Realtor® with more than 30 years of experience serving the Myrtle Beach and Grand Strand markets. As the founder of Century 21 The Harrelson Group, Greg has built his career helping buyers, sellers, and investors achieve success in every corner of the coastal Carolina real estate market. His expertise spans residential homes, investment properties, land development, and coastal condos. Known for his deep local knowledge, innovative marketing strategies, and commitment to personal service, Greg consistently helps clients reach their real estate goals while navigating the ever-changing market with confidence and precision.