Septic Permits in Richland and Lexington County
In South Carolina, on-site sewage systems are permitted under SCDES Regulation 61-56, and Richland and Lexington County lots go through the SCDES regional office that covers the Midlands. Here is what needs a permit, what does not, who files it, and what the process looks like from soil evaluation to final inspection.
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The short answer
- Needs a permit: a new system, a replacement tank, a new or rebuilt drain field, a mound or other alternative system, a change in system design (a different pump or dosing arrangement), and bringing a system up to a larger bedroom count after an addition.
- Does not need a permit: pumping, a riser and lid on an existing tank, replacing a baffle or effluent filter, a like-for-like effluent pump or float swap, and a repair to the house-to-tank line.
- Who files: the installer, in practice. The application is made in the owner’s name with the plat, the house plan or bedroom count and the soil evaluation attached.
- Who evaluates the soil: a soil classifier or the SCDES inspector, boring to trench depth on the actual field footprint and recording the limiting layer and the perc.
- Inspections: at minimum the open-trench inspection before backfill; more for alternative systems. Nothing is covered until it has been seen.
- Records: the permit, the as-built and the inspection sign-off stay on the county file and are what a buyer’s attorney asks for at a sale.
Why this matters in Columbia and SC
The permit is not a fee for its own sake; it is the soil evaluation. Midlands clay in Richland and Lexington County reads well in the top few inches and badly at the depth a trench actually runs, and the regulation requires the evaluation at that depth. A field built without it is the field that surfaces in its first wet winter. The permit also fixes the setbacks — from wells, property lines, surface water, the house — on the site plan, which is what protects the field from the shed, the pool or the driveway extension that comes later.
An unpermitted system also follows the property. At a sale, the buyer’s attorney or lender asks for the permit and the as-built; if there is none, the system may have to be evaluated or brought into compliance before closing. The cheapest permit is the one pulled when the work was done.
What to do next
- Look for the existing file. The original permit and as-built for a Richland or Lexington lot are usually on the county file by address; we pull it before any field work so the design starts from what is there.
- Get the soil evaluation done before anything is ordered. The limiting layer and the perc pick the system; the tank catalog does not.
- Let the installer file. The application, the plan and the inspection scheduling are part of the job on this site; you sign, we file.
- Do not backfill before the inspection. An open trench the inspector has not seen is an uninspected system, whatever the invoice says.
When to call a professional immediately
A failing field, a tank that has to come out, an addition that raised the bedroom count, or a sale where the buyer wants the permit file: those are the calls to make before a plan is drawn. Phone (803) 770-5203 with the address and what you are planning, and we tell you whether it is a permitted job and what the file already holds.
What a professional assessment covers
The first visit for a permitted job walks the lot with the plat: where the house, well, property lines and any surface water sit, where a field can physically go, and what is already in the ground. Then the soil evaluation on that footprint, the design drawn to the result and the bedroom count, and the application filed with the SCDES regional office. We schedule the inspections and stay for them. The work itself is described on septic tank installation, septic system replacement, drain field repair and mound and alternative systems; the price bands are on the Columbia septic cost page, where the permit is a line on the quote, not a surprise after it.
Frequently asked questions
Do I need a permit to pump my septic tank in Richland or Lexington County?
No. Pumping is maintenance. So are a riser, a baffle or filter replacement and a like-for-like pump swap on an existing permitted system.
Do I need a permit to replace a drain field?
Yes. Rebuilding or replacing laterals, or changing the field’s design or footprint, is a permitted job under SCDES Regulation 61-56 and is inspected before backfill.
Who pulls the septic permit — me or the contractor?
The application is in the owner’s name, but on this site the installer prepares and files it with the plat, plan and soil evaluation, and schedules the inspections. You sign.
What if my house was enlarged and the septic system was never updated?
SCDES 61-56 sizes a system to the bedroom count. If bedrooms were added, the system may be undersized on paper and the county can require a review or an upgrade; it also comes up at a sale. We check the original permit and tell you what the regulation requires.
Related services
Get help
Columbia Septic Tanks is a local septic service for Columbia and the surrounding SC Midlands — Richland and Lexington County. Call (803) 770-5203 and tell us the address and what you are seeing.