The plumbing code in Hanahan, SC decides whether your new water heater, bathroom remodel, or sewer repair passes inspection or gets red-tagged. Hanahan enforces the 2021 SC Plumbing Code today, requires a permit for nearly every job beyond a washer swap, and verifies every contractor's license before work starts, but a 2027 code update is already locked in. Here's exactly what triggers a permit, who checks your work, and what's changing next.
Which Plumbing Code Applies in Hanahan, SC Right Now
Hanahan's mandatory code is the 2021 SC Plumbing Code or the 2021 International Plumbing Code with SC modifications , and this edition has been enforceable since January 1, 2023. The current edition is 2021 IPC, effective 2023-01-01 (adopted 2021-10-06), adopted by the SC Building Codes Council (SCBCC) , and local jurisdictions like Hanahan are required to enforce it.
South Carolina doesn't adopt base ICC text word-for-word. The state takes the IPC as its base and layers state amendments on top, so a cited section refers to the state-adopted edition with the IPC as the underlying model , and city inspectors enforce those amendments, not the unmodified ICC book.
That edition isn't permanent. The 2024 South Carolina Building Codes carry an effective date of January 1, 2027 , and on August 26, 2025 the Building Codes Council adopted the 2024 editions of the IBC, IRC, IFC, IPC, IMC and IFGC along with the 2023 National Electrical Code . If your permit application is approved before that date, you generally aren't forced to redesign mid-project: work with a completed building permit application approved prior to the implementation date is allowed to be completed and must be inspected under the building codes in effect at the time the original building permit was issued . For the official adoption schedule, see the South Carolina Building Codes Council.
| Code | Edition Through 2026 | Edition Starting Jan 1, 2027 |
|---|---|---|
| Plumbing |
2021 International Plumbing Code with SC modifications
| 2024 IPC with SC modifications |
|---|
| Building |
2021 International Building Code (non-residential)
| 2024 IBC with SC modifications |
|---|
| Residential |
2021 International Residential Code with SC modifications
| 2024 IRC with SC modifications |
|---|
| Electrical |
2020 National Electrical Code
|
2023 National Electrical Code
| Mechanical / Fuel Gas |
2021 International Mechanical Code (IMC) and 2021 International Fuel Gas Code (IFGC)
| 2024 IMC/IFGC with SC modifications |
Hanahan Plumbing Permits: What Needs One (and What Doesn't)
Not every plumbing task in your Hanahan, SC home needs city sign-off. The split comes down to whether you're altering piping or just swapping a part.
Permit-exempt work generally includes:
- Repairing or replacing a plumbing fixture, like a faucet or showerhead, without moving supply or drain lines (
repair or replace plumbing fixtures )
- Clearing a clogged drain
- Swapping a washer or similar wear part
Work that requires a Hanahan plumbing permit includes:
Plumbing construction, reconstruction, alteration and repairs that change piping, venting, or fixture location
- New water heater installs or a full water heater replacement
- Repiping or water line repair work
- Gas line construction, reconstruction, alteration, or repair (
gas construction, reconstruction, alteration and repairs requires a permit)
Can a Homeowner Pull Their Own Plumbing Permit in Hanahan?
Yes, with conditions. As a homeowner, you can obtain a building, electrical, plumbing and mechanical permit , but that requires you or your immediate family members to be performing the work and intending to live in the home for at least two years after it's completed, with an Owner/Disclosure Form completed . One exception: City Ordinance prohibits a homeowner from obtaining a gas permit and performing the work themselves. Contractors should never pull a permit on a homeowner's behalf for work they aren't performing.
What City Reviewers Check Before Approving Your Plans
When plans hit the Building & Codes office, reviewers compare them against a stack of adopted codes, not just the plumbing code alone:
2021 International Building Code, Plumbing, Mechanical, Fuel Gas, and Fire Prevention Codes with SC Amendments
2021 International Residential Code with SC Amendments
2020 National Electrical Code with SC Amendments
2017 A117.1 Accessibility Code
Federal Floodplain Management requirements, verified through the Plan Review process
Compliance with the Berkeley County Stormwater Ordinance
In our experience pulling permits for water heater swaps and drain repairs across Hanahan, inspectors check backflow protection and proper venting on every job, not just the big renovations. Skipping that step is the single most common reason a re-inspection gets scheduled.
Contractor License & Business License Verification
Before a permit is issued, the city checks paperwork beyond your project plans. Contractors must have a State of South Carolina Contractor's License and a City of Hanahan Business License for any type of construction, and all licenses are verified prior to a building permit being issued.
Homeowners can run the same check before signing a contract. The SC Contractor's Licensing Board maintains a public Licensee Lookup for contractors, so you can confirm a licensed Hanahan plumber is active before work begins, not after.
Ready to hire a crew that already pulls Hanahan permits correctly? Get a Free Estimate before your project starts, and skip the re-inspection headache.
Who's Responsible for Your Water and Sewer Lines in Hanahan
Berkeley County Water and Sanitation (BCWS) maintains the public mains, but responsibility splits at your property line. BCWS maintains clean outs located in the public right of way, but the maintenance of a clean out on private property is the owner's responsibility . More specifically, it is the homeowner's responsibility to open the sewer cleanout at the property line and determine when repair service is needed from BCWS, and if there is no flow or backup at the cleanout, the blockage is between the structure and the cleanout, meaning you should call your plumber .
That means routine clogs inside your house are your call to make, not the utility's. If BCWS diagnosis points to a blockage on your side of the line, sewer line cleaning from a licensed plumber is the next step. For the utility's side of the boundary, see Berkeley County Water and Sanitation directly.
For a broader look at how supply and drain lines fit together in a typical home, our Holly Hill, SC homeowner's guide to plumbing breaks down the basics room by room.
FAQ
Do I need a permit for plumbing work done in my home?
Yes. Most plumbing work in Hanahan, including new installations, repairs, and alterations, needs a city-approved permit before work begins, and the finished job must comply with the 2021 IPC and South Carolina's amendments. Skipping this step can delay or kill a home sale.
What can a homeowner do without a permit in SC?
South Carolina generally allows permit-exempt work like repairing or replacing plumbing fixtures , such as a washer or showerhead. Anything that moves piping, adds a fixture, or changes venting needs a permit.
Can I pull my own plumbing permit in Hanahan without a contractor?
Yes. As a homeowner, you can obtain a building, electrical, plumbing and mechanical permit , provided you or immediate family perform the work and you plan to live in the home for at least two years after completion . Gas work is the exception; the city prohibits homeowners from pulling their own gas permit .
Do I need a licensed Hanahan plumber for a small job, like installing a new faucet?
Yes. A licensed plumber is required for fixture installations, from faucets to water heaters, under city and state code. Skipping licensed work can void insurance coverage or complicate a future sale. See our Hanahan plumbing services page for help scheduling.
Who is responsible for the water and sewer lines serving my Hanahan home?
BCWS maintains the public mains and public right-of-way infrastructure. Homeowners are responsible for opening the sewer cleanout at their property line and determining when BCWS repair service is needed , and anything between the structure and the cleanout is the homeowner's plumber to call.
Why should I hire a professional plumber in Hanahan?
Hanahan's code requires homes to meet current standards before a sale closes, and DIY repairs often miss the details inspectors actually check, like venting and backflow prevention. Hiring a licensed plumber protects resale value and keeps the work compliant the first time.
Have a project in mind? Visit our homepage to see every service area, or request a free estimate and get a code-compliant quote before you break ground.
