Bathroom Remodel Permit in Florence, SC (2026)

Research by DoINeedAPermit Research Team · Updated May 2026

The Short Answer

A full bathroom remodel needs a permit in Florence if you're relocating fixtures, adding electrical circuits, installing a new exhaust fan, converting tub-to-shower, or moving walls. Surface-only work—tile, vanity swap, faucet replacement in the same location—typically does not.

Florence follows the 2015 International Building Code (which South Carolina adopted) and enforces it through the City of Florence Building Department. The critical local detail: Florence processes bathroom permits as standard interior projects with no expedited 'over-the-counter' track, meaning even straightforward fixture relocations go through full plan review (typically 2–4 weeks). Unlike some nearby South Carolina municipalities that allow owner-builder work for residential projects under SC Code § 40-11-360, Florence requires the licensed contractor signature on all trade drawings—plumbing, electrical, and HVAC plans—even if you are the owner-builder. This effectively means you will need a licensed South Carolina plumber, electrician, and HVAC technician to sign off, not just pull permits yourself. The permit fee is calculated at roughly 1.5–2% of the project valuation (materials + labor estimate), landing most full bathroom remodels ($15,000–$40,000) in the $300–$800 range. Pre-1978 homes trigger lead-paint disclosure and safe-work practices, adding 2–3 days to your timeline.

What happens if you skip the permit (and you needed one)

Stop-work orders and fines: Florence Building Department can issue a stop-work order costing $250–$500 in penalties, plus you'll be forced to pull a permit retroactively and pay double the original permit fee (roughly $600–$1,600 total).
Insurance and lender denial: Most homeowner's insurance policies and mortgage refinancers require permitted, inspected work; unpermitted bathroom remodels can trigger claim denial or refinance rejection, costing you $10,000–$50,000 in loan denial or repair escrow.
Resale and disclosure: When you sell, South Carolina's residential property disclosure form (SRPDSF) requires listing all unpermitted improvements; misrepresentation can expose you to rescission, damages, or title defects costing $5,000–$100,000.
Code violation lien: If a future owner or inspector discovers unpermitted structural or plumbing work tied to flooding or mold, the city can file a code violation lien against your property, blocking refinancing or sale until corrected (costs $2,000–$15,000 to remediate and clear).

Florence bathroom remodel permits — the key details

Fixture relocation is the main trigger. Under IRC P2706 (Drainage Fittings) and the 2015 IBC adopted by Florence, any movement of a toilet, sink, shower, or tub from its existing location requires a plumbing permit and rough inspection. This includes moving a toilet from one wall to an adjacent wall, relocating a sink 3 feet closer to the door, or converting a tub-and-shower combo into a walk-in shower with the drain relocated. The City of Florence does not carve out exemptions for 'minor' fixture moves; the test is whether the drain line, vent, or supply line changes. If you are keeping the toilet in the exact same spot but replacing the bowl and wax ring, no permit. If you are sliding it 12 inches to clear a vanity, you need a permit.

Electrical work in bathrooms carries strict GFCI and AFCI rules that drive plan review hold-ups. Per IRC E3902.1, all 15A and 20A branch circuits in bathrooms must be protected by GFCI (ground-fault circuit interrupter) devices—either individual outlets or a breaker protecting the whole circuit. Additionally, IRC E3903.2 requires AFCI (arc-fault circuit interrupter) protection on 120V branch circuits supplying outlets in bathrooms. If you are adding a new exhaust fan, a heated towel rack, or additional outlets, your electrician must show the GFCI/AFCI strategy on the electrical plan submitted with the permit. The City of Florence review staff frequently flag missing GFCI notation; expect a correction notice and 5–7-day resubmission cycle if your plan doesn't spell this out. Replacing an existing outlet in place (same location, same circuit) is exempt.

Exhaust fan installation requires a duct termination plan. IRC M1505.2 mandates that bathroom exhaust fans must duct to the outside (not into an attic, crawlspace, or soffit). The duct must be at least 3 inches diameter for residential fans, sloped downward to the exterior, and terminated with a damper-back vent cap to prevent backflow. When you submit a permit for a new exhaust fan or fan replacement (even if you are upgrading an existing fan), the City of Florence requires a note on the mechanical plan showing the duct routing, exterior termination location (not into the soffit), and damper type. Missing this detail is the #2 reason for permit rejections on bathroom remodels in Florence. If you are retrofitting a home with no existing exhaust fan, budget $400–$800 for ductwork and termination alone.

Shower waterproofing and tub-to-shower conversion work falls under IRC R702.4.2 (Water-Resistive Barriers) and is a common code pinch-point in Florence. If you are converting a bathtub to a walk-in shower, you are triggering a new waterproofing assembly: the walls must be lined with a waterproof membrane (vapor barrier or liquid-applied membrane) underneath all tile, drywall, or paneling. The standard assembly is cement board + waterproofing membrane + tile. If you use alternative waterproofing (e.g., Schluter, Ditra, or Kerdi), you must specify it on the plan and show that the manufacturer's installation details match the code. The City of Florence does not pre-approve specific brand-name systems; it simply requires that whatever you specify meets IRC R702.4.2. Plan-review staff will ask for the manufacturer's spec sheet if your plan just says 'waterproof shower.' Budget an extra 3–5 days for this back-and-forth if you don't include the detail upfront.

Licensed tradesperson signatures are non-negotiable for Florence permits. Unlike some rural South Carolina jurisdictions, Florence requires that all plumbing, electrical, and HVAC plans be signed and stamped by a licensed South Carolina plumber, electrician, and HVAC contractor respectively—even if you are the owner performing the work yourself (which is allowed under SC Code § 40-11-360 for owner-occupied residential). In practice, this means you must hire a licensed contractor to prepare and sign the drawings, or at minimum have a licensed plumber review your DIY sketches and sign off. This is a cost barrier: plan-review and stamp fees from a plumber or electrician typically run $150–$300 per trade per permit. The City of Florence enforces this strictly; permits without licensed signatures are rejected at intake.

Three Florence bathroom remodel (full) scenarios

Scenario A

Tile-and-vanity refresh, existing toilet and tub in place — downtown Florence historic district

You are ripping out the existing tile, grouting, and wall paint in a 1960s bathroom. You are replacing the vanity cabinet and faucet with an identical unit (same plumbing rough-in locations), keeping the toilet and tub in place, and adding new subway tile and paint. No electrical changes, no exhaust fan upgrade. This is pure cosmetic work. The City of Florence does not require a permit for surface-only remodels: no fixture relocation, no new electrical circuits, no duct work. However, if your home was built before 1978, you must follow EPA lead-safe practices (containment, HEPA vacuum, post-work clearance test). The lead work itself does not trigger a plumbing or electrical permit, but it does add 3–5 days and a certified lead contractor cost of $400–$800. Total project cost is roughly $8,000–$15,000. Timeline: 2–3 weeks with lead-safe protocol; 5–7 days without. No building permit required. No building inspections. The one wrinkle: the downtown historic district in Florence requires a Certificate of Appropriateness for any exterior-visible work; tile and paint are typically not subject to COA review, but if you are adding a new vent termination or changing the window, you'll need a COA ($50–$150) and a 2-week design review from the Historic District Commission.

Scenario B

Relocate toilet and sink, add new exhaust fan — Greenwood neighborhood 1980s ranch

You are moving the toilet 4 feet to the opposite wall, relocating the sink to a new island vanity, and installing a new 100-CFM exhaust fan with ductwork to the roofline. This is a gut remodel. The toilet relocation triggers a plumbing permit because the drain and vent lines must be rerouted (IRC P2706). The sink relocation does the same. The new exhaust fan requires HVAC and electrical permits because you are adding ductwork and a 120V circuit (IRC M1505, E3902). You must submit a set of plans: plumbing plan showing the new drain and vent routes, electrical plan showing the GFCI-protected exhaust circuit, and mechanical plan showing the duct routing and roof termination. All three must be signed by a licensed SC plumber, electrician, and HVAC contractor. The City of Florence Building Department will review the plans for 10–14 days, checking for trap-arm compliance (max 3 feet vent-to-toilet), GFCI notation, and duct sizing. Budget: $250 plumbing permit + $150 electrical permit + $100 HVAC permit = $500 total permit fees. Licensed trade stamp fees (if hired separately for plan review): $150–$300 per trade, so $450–$900 additional. Project cost is $18,000–$35,000. Inspection sequence: rough plumbing (before drywall), rough electrical (before drywall), rough mechanical (before drywall), final plumbing, final electrical, final mechanical (3–4 inspections over 4–6 weeks). Timeline: 2-week plan review + 4–6 weeks construction + inspection cycle = 6–8 weeks total.

Scenario C

Tub-to-shower conversion with wall relocation and heated floors — post-WWII bungalow, owner-builder

You are gutting the bathroom completely: removing the existing tub, relocating a wall to expand the shower footprint by 2 feet, installing a walk-in shower with a 36-inch curb-less threshold, adding heated floor mats under the tile, and installing a new exhaust fan. The wall relocation triggers a structural review (IRC R602 for interior walls, 2015 IBC adoption in Florence). The tub-to-shower conversion triggers a waterproofing assembly review (IRC R702.4.2): you must specify cement board or similar backer board plus a liquid-applied or sheet waterproofing membrane underneath the tile. The heated floor mats are a 120V electrical load, so you're adding a dedicated GFCI circuit (IRC E3902, E3903). The exhaust fan is another mechanical permit. You are the owner-builder, so per SC Code § 40-11-360 you can perform the work yourself, but you still must hire a licensed plumber, electrician, and structural engineer (or general contractor) to review and sign the plans. Plan scope: structural drawing showing the wall removal/relocation (with header sizing for the 2-foot span); plumbing drawing showing the new drain routing and trap compliance; electrical drawing showing the heated-floor circuit and GFCI; mechanical drawing showing exhaust duct routing. The City of Florence will reject any plan that doesn't specify the waterproofing system (e.g., 'Schluter Kerdi + cement board + tile' is acceptable; 'waterproof shower' is not). Expect a 2–3-day correction-notice cycle. Permit fees: structural $200, plumbing $250, electrical $150, HVAC $100 = $700. Licensed stamp fees: $150–$300 per trade (minimum 3 trades) = $450–$900. Total permit and plan review $1,150–$1,600. Project cost $25,000–$50,000. Inspections: framing/wall, rough plumbing, rough electrical, rough mechanical, waterproofing/tile inspection (often combined with framing), final. Timeline: 3-week plan review (due to structural complexity and waterproofing spec requests) + 6–8 weeks construction = 9–11 weeks total.

Structural permit $200 + Plumbing $250 + Electrical $150 + HVAC $100 = $700 | Waterproofing system must be specified (cement board + membrane) | Heated-floor GFCI circuit required | Wall relocation structural review | Licensed stamps required (owner-builder allowed) | 5–6 inspections over 9–11 weeks | Project $25,000–$50,000

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Waterproofing assembly details and why Florence inspectors scrutinize them

IRC R702.4.2 (Water-Resistive Barriers for Showers/Tubs) is the code section that trips up most bathroom remodelers in Florence. The rule is simple: any shower or tub surround must have a continuous waterproof membrane behind the finish material (tile, stone, acrylic panels). The membrane must be installed on the studs before drywall or cement board goes up, creating a sealed envelope that channels water back to the drain rather than into the wall cavity. If water gets past the tile and soaks the drywall or framing, you get mold, rot, and structural failure within 2–5 years.

Florence Building Department inspectors know this from experience: the region's high humidity (coastal South Carolina, 3A climate zone) combined with sandy soil means water damage spreads fast. When a remodeler submits a plan that just says 'waterproof shower,' the inspector flags it because 'waterproof' is vague. Does it mean vinyl wallpaper behind tile? A single layer of tar paper? A proper liquid-applied membrane? The IRC requires a tested assembly, meaning you must specify either: (a) cement board + liquid-applied waterproofing (e.g., RedGard, Hydro Ban); (b) cement board + waterproofing membrane sheet (e.g., Schluter Kerdi); or (c) a pre-manufactured waterproofing system (e.g., Schluter, Ditra, Wedi). If you deviate from these standard assemblies, you must provide the manufacturer's third-party test report showing compliance with ASTM E96 (water-vapor transmission) and ASTM D779 (impact resistance).

During plan review, the City of Florence reviewer will request the waterproofing spec sheet and installation detail if it's missing from your submittals. This adds 3–7 days to review time. On the job site, the rough plumbing and framing inspector will check that the membrane is fully adhered, overlapped at seams per manufacturer specs, and properly sealed at the drain. If the membrane is wrinkled, torn, or only partially applied, the inspector will tag the work as deficient and require rework before drywall goes up. The cost to add proper waterproofing after drywall is installed is 3–5 times higher than doing it right the first time, so getting the spec detail in the permit application saves you money down the road.

GFCI and AFCI requirements in Florence bathrooms and plan-review red flags

The City of Florence enforces IRC E3902.1 (GFCI-Protected Receptacles) and IRC E3903.2 (AFCI Protection on Bathroom Branch Circuits) with particular strictness because many older homes in Florence were built before these rules existed (pre-1999 for GFCI, pre-2008 for AFCI). When you submit an electrical plan for a bathroom remodel, the inspector will check three things: (1) every 15A or 20A outlet within 6 feet of a sink or tub is GFCI-protected; (2) all other 120V branch circuits in the bathroom are AFCI-protected; (3) the plan clearly labels which outlets are GFCI and which circuits are AFCI, or notes that a single dual-function GFCI/AFCI breaker is installed in the panel.

A common mistake: the electrician shows a new outlet for the exhaust fan but doesn't label it GFCI or note that it's on a dedicated AFCI breaker. The plan reviewer flags this and rejects the submittal pending clarification. To avoid this, your electrical plan should include a legend or note: 'All receptacles within 6 feet of basin are GFCI-protected per IRC E3902.1. All 120V circuits in bathroom are AFCI-protected per IRC E3903.2.' If you're upgrading from an old non-GFCI bathroom, the new design must meet current code, not just preserve the old layout. This means you may need to add a GFCI breaker in the main panel (cost $150–$300) or upgrade individual outlets to GFCI (cost $40–$60 per outlet).

During final inspection, the inspector will test the GFCI outlets with a tester to confirm they trip properly (leakage detection). If a GFCI outlet fails the test, the whole circuit fails inspection. This is rare if the electrician installed quality components, but it happens if someone uses a cheap aftermarket GFCI. Budget for quality outlets (Leviton, Pass & Seymour, or equivalent) and confirm that your electrician tests all GFCI devices before final inspection.

City of Florence Building Department
Florence City Hall, Florence, South Carolina (exact address and permit counter location varies; contact city directly)
Phone: Call Florence City Hall main line and ask for Building Department; specific permit counter phone number varies | Florence permit portal (search 'City of Florence SC building permit online' or contact City Hall for portal URL)
Typically Monday–Friday, 8:00 AM–5:00 PM; verify locally as hours may change seasonally

Common questions

Do I need a permit to replace my toilet in the same location?

No. Replacing an existing toilet with a new unit in the same location, on the same drain, is exempt from permitting. You simply turn off the water, unbolt the old toilet, install a new wax ring and flange bolts, and set the new toilet. The plumbing rough-in does not change, so no permit is required. If you are moving the toilet to a different wall or location, you must pull a plumbing permit.

Can I do the work myself, or do I have to hire a contractor?

South Carolina Code § 40-11-360 allows owner-builders to perform work on their own residential property without a license. However, the City of Florence requires all permit plans to be signed and sealed by a licensed plumber, electrician, and HVAC contractor. You can do the hands-on work, but you must hire licensed tradespeople to review and sign your plans. This is a common hybrid model: you act as the general contractor and perform the labor, and the trades review and permit the scope.

How long does plan review take in Florence?

Most bathroom permits receive a first-round review within 10–14 business days. If your plan is incomplete (missing GFCI notation, waterproofing spec, duct termination detail), you'll receive a correction notice, and you'll have 7–10 days to resubmit. A straightforward fixture-relocation permit might clear in one cycle; a complex tub-to-shower conversion with wall changes can take 3–4 weeks total review time before approval.

What inspections do I need, and can I watch?

For a full bathroom remodel, expect 4–6 inspections: rough plumbing (before drywall), rough electrical (before drywall), rough mechanical/HVAC (before drywall), framing/wall inspection (if walls are moved), waterproofing/tile inspection (often combined), and final plumbing, electrical, and mechanical. You can watch and should be present for rough inspections so the inspector can point out any issues while the work is still accessible. Final inspection is non-negotiable; the inspector must verify all work against the approved plan before you can occupy.

Do I have to apply for separate permits for plumbing, electrical, and HVAC, or can I bundle them?

The City of Florence allows you to submit a single bathroom-remodel permit application that bundles the plumbing, electrical, and HVAC scopes, but the city issues separate permit cards and collects separate fees for each trade. One application form, three permit numbers, three inspection schedules. Make sure your GC or plumber bundles the submittals so you don't pay three separate filing fees.

If my home was built before 1978, do I need special permits for lead-paint work?

You don't need a separate permit, but you must follow EPA lead-safe work practices (RRP Rule). This means your contractor must be EPA-certified, use containment and HEPA vacuuming, and perform a post-work clearance test. The bathroom itself is usually low-lead-content (bathrooms are often repainted), but walls may have lead under the paint. Budget an extra $400–$800 and 3–5 days for lead-safe protocols. Mishandling lead in a pre-1978 home can trigger EPA fines ($10,000+) and void your insurance.

What is the permit fee, and how is it calculated?

Florence calculates bathroom permit fees at roughly 1.5–2% of the estimated project valuation (including materials and labor). A $20,000 bathroom remodel yields a permit fee of $300–$400. A $40,000 remodel runs $600–$800. Submit your contractor's estimate or quote with the permit application so the city can calculate the fee. If you underestimate the valuation, the city may reassess the fee after inspection.

If I don't pull a permit and do the work, can the city force me to tear it out?

Yes. If the unpermitted work violates code (improper waterproofing, missing GFCI, plumbing not sloped correctly), the city can issue a code violation notice requiring you to remove and redo the work to code. The city can also place a lien on your property if you don't comply. If you are selling the home, the buyer's inspector will likely flag unpermitted work, and the buyer can demand removal or a credit to fix it, costing you $5,000–$30,000 depending on the scope.

Are there any local Florence-specific rules that differ from the state code?

Florence adopts the 2015 International Building Code with no major local amendments that would change bathroom-remodel requirements. The one local quirk: if your home is in the downtown historic district, you may need a Certificate of Appropriateness from the Historic District Commission for any work that affects exterior appearance (e.g., new roof vent, exterior duct termination). This adds a 2-week design-review cycle and a $50–$150 COA fee. Interior-only work typically does not require COA review.

Can I change the size or location of the bathroom or add a new bathroom at the same time as the remodel?

Yes, but it triggers a different code path. Adding a new bathroom (vs. remodeling an existing one) requires plumbing, electrical, and structural permits if you're adding walls or relocating the space. The permit fees and inspection requirements are similar to a full remodel, but the code review may be more stringent because the city will check for minimum fixture clearances (toilet: 15 inches from centerline to wall; sink: 12 inches; shower: 30 inches clear width per IRC). If you're expanding the existing bathroom footprint by moving a wall, this is treated as a combined remodel-and-new-addition, so budget accordingly.

Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current bathroom remodel (full) permit requirements with the City of Florence Building Department before starting your project.

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