Bathroom remodel permit in Greenville, SC: when you need one and who issues it

By the GVL Plumbers editorial team · Published Oct 31, 2026 · 10 min read · Filed under Seasons, permits & local rules

A cosmetic bathroom refresh (paint, a new vanity top, a mirror, new towel bars) doesn't need a permit anywhere in Greenville County. The line gets crossed when the plumbing itself changes, and in a real remodel it almost always does. Moving the toilet six inches, turning a tub into a walk-in shower, or swapping an old two-handle shower valve for a new one all count.

The confusing part locally is that the permit office depends on your address, not your mailing city. A "Greenville" or "Simpsonville" address can sit in unincorporated county land, and parts of Greer and Fountain Inn reach into neighboring counties.

Who issues a bathroom remodel permit in Greenville, SC

Start by finding out whether your property is inside city limits. The county's property records or your tax bill will tell you. Then call the office that matches.

If you hire a licensed plumber, the plumber normally pulls the plumbing permit and schedules the inspections. Ask whether the permit fee is in the quote. A price far below the others sometimes means the permit isn't, and in Mauldin starting without one doubles the fee. Our Mauldin plumbing page covers that city's rules in more detail.

Which plumbing changes need a permit

South Carolina builds its residential code on the International Residential Code. The IRC's short list of plumbing work that doesn't need a permit (Section R105.2) is narrow: stopping a leak in a drain or supply pipe without replacing pipe, clearing a stoppage, repairing a leak in a pipe, valve or fixture, and pulling and resetting a toilet, as long as none of it replaces or rearranges valves, pipes or fixtures. Everything past that is permit territory, though cities and the county can and do set their own practices for simple swaps. Mauldin, for one, writes "replacing" right into its rule.

If the remodel is part of a bigger plumbing job, our repiping page explains what a repipe involves and how long it takes.

Can a homeowner pull the permit?

Yes, in South Carolina, with conditions. Section 40-59-260 of the state code lets an owner improve their own residential property without a contractor's license, doing the work personally or with licensed contractors, as long as it's for the owner's own use and occupancy and not for sale or rent. A few strings come with it:

• The owner has to personally appear and sign the permit application.
• Selling or renting the property within two years of finishing is treated as evidence it was built for sale or rent, which breaks the exemption.
• The owner has to file a notice with the register of deeds stating the work was done as an unlicensed owner-builder. Not filing it revokes the exemption.
• You can't hire an unlicensed person to do the plumbing for you. Anyone you pay has to hold the license the work requires.

Greenville County asks owner-builders for a notarized, recorded Owner Builder Disclosure Statement and says the property must be held by an individual and not be for sale, lease or rent. The City of Greenville has its own homeowner exemption request form. Other towns handle it their own way, so ask before you start.

Honestly, for plumbing, most homeowners shouldn't. Drain slope, venting and the shower pan are where DIY bathrooms fail inspection, and a leak under new tile is an expensive lesson. Doing the demo and tile yourself while a licensed plumber handles the rough-in and the permit is a common middle ground.

What gets inspected, and when

A bathroom remodel with plumbing changes usually sees the inspector at least twice.

1. Rough-in, with the walls and floor still open. The inspector looks at drain size and slope, vents, how pipes are supported and protected where they pass through framing, and the new supply lines. Drain and supply piping are typically tested for leaks at this stage, so the plumber will have plugs and a test gauge on site.
2. Final, after fixtures are set. The inspector checks the fixtures, the valve, and that everything drains and has no leaks. Under South Carolina's current rules the shower liner test is done at the final plumbing inspection. From January 1, 2027, the builder may choose to do it at rough-in instead.

Greenville County Building Safety has announced that starting November 1, 2026, the separate trade rough-ins on residential new construction and alteration permits will be handled as one combined rough-in inspection. If your project is in the unincorporated county, ask the office how that affects your scheduling, because the electrician, plumber and HVAC contractor now need to be ready at the same time.

Two practical notes. First, don't close a wall until the rough-in passes. An inspector can make you open it. Second, county residential plumbing permits become invalid if work doesn't start, or stops, for six months, so a remodel that stalls can need a new permit.

Shower pan basics: the test that catches the costly mistake

A tiled shower floor isn't waterproof by itself. Underneath is a liner (or a waterproofing membrane) that catches water that soaks through the grout and steers it into the drain. When the liner leaks, you find out months later through a stained ceiling, a soft subfloor or rot at the sill.

South Carolina's version of the residential code spells out the test. Where the shower floor is made watertight by a liner, the completed liner gets tested by filling it to the lesser of the threshold depth or 2 inches, holding it for at least 15 minutes with no sign of leakage. Under the current rules the test is done at the final plumbing inspection; under the 2024 code South Carolina adopts on January 1, 2027, the builder can choose rough-in or final. The drain is plugged during the test. Our guide to the 2027 code changes covers the rest.

• Ask your installer what waterproofing system they use and whether they'll flood test it themselves before tile goes on. Many do it overnight, which is stricter than the code minimum.
• Take photos of the liner or membrane before tile. They're useful later if anything goes wrong.
• Prefab shower bases with their own built-in drain flange are a different animal; follow the maker's installation steps.

Anti-scald shower valves: what the code requires

If you replace the shower or tub-shower valve, the new one has to be a pressure-balancing, thermostatic or combination valve that meets the ASSE 1016 or ASME A112.18.1 standard, and it must have a way to limit the maximum setting to 120°F, adjusted in the field per the maker's instructions. That's the South Carolina modification of the code's shower valve section.

In plain terms, the valve keeps a toilet flush or a running dishwasher from suddenly sending scalding water at you, and it has a limit stop that keeps the handle from turning all the way to hot. Old two-handle valves in 1950s and 60s bathrooms don't do either, which is one reason a "simple" valve swap becomes a permit job. The limit stop matters more than people think in houses with kids or older adults. If your hot water seems weak after the swap, the stop may be set low, and it's adjustable. Our no hot water guide covers the other causes.

Hiring for the plumbing part

South Carolina licenses residential plumbing work through SC LLR's Residential Builders Commission. The state's definition of a residential specialty contractor covers jobs over $500 (raised from $200 in 2022), so almost any bathroom plumbing job you pay for falls under it. Check the license before you sign anything; our guide to checking a plumber's license in SC takes about two minutes. For tips on comparing bids, see how to choose a plumber in Greenville.

When you collect quotes, ask each company to list the permit, the inspections, any water heater or gas work, and patching. The gap between two bathroom quotes is often in those lines. For typical prices, our Greenville plumber cost guide has the ranges we could source.

Bathroom remodel permit questions