Do I need a permit for a full bathroom remodel in
Myrtle Beach, SC?

Myrtle Beach bathroom remodel permits — the key details

Myrtle Beach Building Department applies the 2015 IRC without major local edits, which means the rules you find in any standard bathroom-code reference apply here. The critical line is this: if you move a fixture (toilet, sink, shower/tub), add a new circuit, install a new exhaust vent, or reconfigure the waterproofing assembly (tub-to-shower conversion), you need a permit. If you're swapping a faucet, replacing a toilet in the same location, or tiling over existing waterproofing, you don't. The reason is liability and inspection: plumbing moves can create trap-arm violations, improper slopes, or cross-connections that cause sewer gas, backups, or contamination. Electrical additions without GFCI protection or proper breaker sizing can cause electrocution. New exhaust vents must be sized per IRC M1505 and vented to the exterior (not into attics or soffits), which is where DIY work most often fails. Waterproofing changes—especially tub-to-shower conversions—require a sealed shower pan system (cement board plus membrane per IRC R702.4.2), which is easy to skip and expensive to fix after drywall is up. The city doesn't have a separate 'bathroom cosmetic' permit, so the decision is binary: does your scope trigger a mechanical, electrical, or plumbing change? If yes, one permit covers all three trades.

Myrtle Beach's coastal location introduces a secondary compliance layer: FEMA flood-zone mapping. Many bathrooms sit in Zone AE or A (100-year flood plain), which requires the finished floor to be at or above base flood elevation (BFE) or the room to be wet floodproofed (removable drywall, impermeable finishes, properly rated vents). If your bathroom is in a flood zone and you're doing a full remodel, the Building Department will flag this during plan review and require you to provide an elevation certificate or a wet-floodproofing design. This doesn't kill the project, but it adds 1–2 weeks to review and may require a civil engineer stamp ($500–$1,500). Salt-air corrosion is also a practical concern: copper piping is fine, but PVC DWV (drain-waste-vent) is preferred for longevity; stainless or PVC fixtures (not chrome) resist the marine environment better. Inspectors won't reject chrome faucets, but they do note this in inspection reports, and some homeowners regret it after 5 years of coastal salt spray.

The exhaust-ventilation rule is a common stumbling block in Myrtle Beach bathrooms. IRC M1505 requires exhaust fans to move at least 50 CFM (cubic feet per minute) for a bathroom under 100 square feet, or 1 CFM per square foot for larger bathrooms. The duct must be rigid or semi-rigid (not the flexible foil corrugated stuff), run to the exterior with a dampered termination cap, and cannot terminate into an attic, soffit, or crawlspace. Many bathrooms in Myrtle Beach have soffits running along the eaves (common in coastal-style homes), and contractors often cheap out by venting into the soffit or attic—this traps moisture, causes mold, and will be rejected on inspection. On your permit application and rough-in drawing, you must specify the duct size (usually 4-inch or 6-inch), length, termination location, and fan CFM rating. If your ductwork run is over 25 feet, you may need to bump up the fan size or add ductwork insulation to prevent condensation. Bring the product spec sheet for your exhaust fan to the inspection.

GFCI and AFCI protection in Myrtle Beach bathrooms is mandated by IRC E3902 (bathroom circuits require GFCI) and IEC 210.12 (new circuits require AFCI). For a full remodel, the electrical plan must show a GFCI-protected circuit for the bathroom receptacles and separate circuits for the exhaust fan and any heated-floor mat. If you're adding a radiant-heat floor, it must be on its own dedicated AFCI-protected circuit and grounded per NEC 690.12. The common mistake is assuming one GFCI outlet protects the whole room—it does protect downstream outlets on that circuit, but the breaker itself must be a GFCI-type or a GFCI outlet must be first in line. Myrtle Beach inspectors verify this at rough-in (before walls close), so your electrician must have the breaker panel labeled and the outlets clearly marked or the rough-in will be rejected. If you're moving a fixture and uncovering old wiring, any existing ungrounded (two-prong) circuits must be upgraded to grounded (three-prong) with proper grounding—this often adds $500–$1,200 to the electrical cost.

Waterproofing for tub and shower areas is where a lot of DIY and cut-rate contractor work fails in coastal bathrooms. IRC R702.4.2 requires a shower or tub enclosure to have a waterproofing membrane (pan system or membrane wrap) that extends at least 6 inches up the walls and fully covers the floor. For tub-to-shower conversions, this means you must remove the old tub surround, install cement board or Kerdi (prefab waterproofing panels), apply a waterproofing membrane (RedGard, Schluter, or equivalent), and then tile. You cannot tile directly over old drywall or wallpaper. The permit drawing must specify the waterproofing system by name and product (not just 'membrane'). If you skip this and water gets behind the tile, you're looking at mold, rot, and structural damage that will cost $5,000–$20,000 to fix. The inspection sequence is: rough plumbing (drain slope, trap configuration), rough electrical, then a critical waterproofing inspection before tile goes on. Some inspectors in Myrtle Beach will ask to see the waterproofing membrane before you even start tiling—bring product photos or a sample. Lead-paint rules also apply: if your home was built before 1978 and you're disturbing painted surfaces during the remodel, you must hire a lead-certified contractor and follow EPA RRP (Renovation, Repair, and Painting) rules. This adds 1–2 weeks to the timeline and cost ($500–$1,500), but it's non-negotiable in South Carolina for pre-1978 bathrooms.

Three Myrtle Beach bathroom remodel (full) scenarios

Myrtle Beach coastal and flood-zone specifics for bathroom remodels

The Charleston Seismic Zone (which includes Myrtle Beach) is a lower-risk seismic area compared to California or the Pacific Northwest, but the 2015 IRC still requires braced headers and proper framing connections in bathrooms, especially if you're moving walls or removing load-bearing studs. If your remodel involves removing any wall, you must have a structural engineer verify that the wall is non-load-bearing or design a proper header (beam) to carry the load. This adds $800–$2,000 in engineering costs and 1–2 weeks to the timeline. Frost depth in Myrtle Beach is only 12 inches (compared to 3–4 feet in colder regions), so foundation and drainage concerns are less severe; however, pluff mud (soft, compressible soil common in coastal areas) can settle unevenly, which can cause foundation cracks and bathroom settling. If your home is on pilings or has a crawlspace, ensure the plumbing underneath is properly supported and sloped. The building inspector will verify this at rough-in. For radiant-floor heating (popular in luxury bathroom remodels), the heated-mat must be installed over a rigid substrate (cement board or thin-set), not floating over old tile or wood subfloors, and it must have its own AFCI-protected circuit. Myrtle Beach's humidity (often 60–80%) makes moisture control critical; ensure your exhaust fan is sized correctly (50 CFM minimum for under 100 sq ft) and vents to the exterior, not the attic or crawlspace. Under-venting leads to mold, and mold is expensive to remediate and a nightmare for resale.

Myrtle Beach permit timeline, fee structure, and submission process

Myrtle Beach's permit fee is based on estimated project valuation; the city applies a flat rate of roughly 1.5–2% of the contract value or a minimum base fee (check the current fee schedule with the Building Department, as rates change annually). A $15,000 bathroom remodel might incur $225–$300 in permit fees; a $30,000 remodel might be $450–$600. If you're doing the work yourself, you can qualify as an owner-builder under South Carolina Code § 40-11-360, which allows you to pull permits on your own home without a general-contractor license. However, you still cannot hire unlicensed plumbers or electricians; any plumbing work must be done by a licensed plumber, and any electrical work must be done by a licensed electrician. Financing is a major consideration: many homeowners finance bathroom remodels through home-equity lines of credit (HELOCs), construction loans, or cash. If you're financing through a lender, they will require a fully permitted and inspected project before they disburse funds. Unpermitted work can kill a loan approval or refinance. Insurance is another: if unpermitted bathroom work causes water damage or electrical fire, your homeowner's insurance may deny the claim, arguing that unpermitted work voided coverage. This is a real risk in Myrtle Beach, where hurricane season (June–November) brings heavy rain and storm surge; water damage from a flooded bathroom can be $10,000–$50,000, and insurance denial is catastrophic.

Common questions