Bathroom Remodel Permit in Henderson, KY (2026)

Research by DoINeedAPermit Research Team · Updated May 2026

The Short Answer

A full bathroom remodel in Henderson requires a permit if you're relocating any plumbing fixtures, adding new electrical circuits, converting a tub to shower, installing a new exhaust fan duct, or moving walls. Surface-only work — tile, vanity, or faucet replacement in the same location — is exempt.

Henderson's Building Department enforces the Kentucky Building Code (which mirrors the 2021 International Building Code), and bathrooms fall squarely into the jurisdiction's permit net once you touch fixture location, electrical load, or drainage. What sets Henderson apart from neighboring cities like Owensboro or Louisville is the city's relatively straightforward online permit portal and the fact that the Building Department maintains a published bathroom checklist that explicitly calls out the waterproofing assembly, GFCI/AFCI circuit requirements, and exhaust fan termination — meaning you can pre-screen your project before walking in. Henderson's plan review typically runs 2-3 weeks for interior remodels (faster than Louisville's 4-6 week baseline), and the city allows owner-builders on owner-occupied single-family homes, which is a significant cost-saver if you're doing some of the work yourself. The city's approach to karst limestone soil conditions (common in Henderson) doesn't directly impact bathroom permits, but it does influence how your drainage system connects to the municipal sewer, so your contractor needs to understand local soil stability when running new drain lines. The key detail that trips up many Henderson homeowners: the city requires a separate HVAC permit for exhaust fan ductwork if it's new, not just a sub-permit under the general remodel.

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

Stop-work orders from Henderson Building Department carry a $250–$500 fine, plus you'll owe double the original permit fee when you finally pull the corrective permit.
Insurance claims on water damage from an unpermitted shower conversion (failed waterproofing) will likely be denied if the insurer discovers no rough inspection approval.
Home sale disclosure: Kentucky requires sellers to disclose unpermitted work; buyers can demand remediation or price reduction, costing $2,000–$8,000 to bring into code post-sale.
Refinancing or equity-line approval: lenders will require proof of permits for any structural, electrical, or plumbing changes; unpermitted work can block the loan.

Henderson bathroom remodel permits — the key details

Henderson adopts the 2021 International Building Code via the Kentucky Building Code, and bathrooms are regulated under IRC Section P2706 (drainage and vent piping) and IRC M1505 (mechanical ventilation). The trigger for permitting is fixture relocation, new electrical circuits, tub-to-shower conversion, new exhaust fan duct, or wall modification. If you're staying in-place — replacing a toilet with a new one in the same footprint, swapping out a vanity for an identical-footprint unit, or re-tiling without touching framing or plumbing — you do not need a permit. Henderson's Building Department publishes a bathroom remodel checklist on its website that lists the five most common plan-review rejections: (1) shower waterproofing system not detailed (cement board + membrane + caulk schedule), (2) GFCI protection not marked on electrical plan, (3) exhaust fan duct termination location not shown, (4) trap arm length on relocated drain exceeding 24 inches without a vent relief, and (5) lack of pressure-balanced valve specification on tub/shower trim. The building department specifically recommends submitting dimensioned floor plans showing old and new fixture locations, electrical panel upgrades (if any), and a waterproofing detail sheet — this front-loading of information cuts review time by a week or more.

Electrical changes in bathrooms are subject to NEC Article 210 (branch circuits) and NEC 680.71 (GFCI requirements). Henderson code enforcement requires GFCI protection on all bathroom countertop receptacles and any new fixtures within 6 feet of a sink or tub. If you're adding circuits — say, a dedicated 20-amp circuit for a heated floor mat or whirlpool tub — that requires electrical plan review and a separate rough electrical inspection. The city does not allow GFCI protection via breaker alone in bathrooms; point-of-use GFCI outlets are required. Additionally, if your bathroom renovation involves work near the main electrical panel or upgrading service capacity, the city may require a licensed electrician; owner-builders can do cosmetic electrical work (receptacle replacement, switch replacement) but not new circuits. This distinction is critical: many Henderson homeowners think they can run a new 20-amp circuit themselves if they own the home, but the city's electrical inspector will flag it as unpermitted and require a licensed contractor to perform the work.

Plumbing for relocated fixtures must comply with IRC P2706 and Kentucky-specific amendments regarding trap design, vent sizing, and sewer connection. The most common mistake in Henderson bathroom remodels is improper trap arm length: if you're moving a toilet, sink, or tub drain more than a few feet from its original location, the horizontal drain line (trap arm) must be sized per code and cannot exceed 24 inches from the trap outlet to the vent stack without a vent relief. Undersized or incorrectly routed drains cause slow drainage, gurgling, and potential overflow — all of which trigger inspection failure and rework. Additionally, Kentucky law requires that any drain relocation in a home built before 1978 be tested for lead solder; the city may require documentation that solder is lead-free (use 95/5 tin/antimony solder for new joints, per NSF/ANSI standards). The city's Building Department requires a rough plumbing inspection before any wall closure, so you cannot drywall over new drain lines without sign-off.

Ventilation and moisture management in Henderson's 4A climate (heating/cooling zone) require compliance with IRC M1505 and IRC R402.4.1 (continuous ventilation in moist spaces). New exhaust fans must be vented directly outdoors — not into the attic or soffit (a common code violation). The city requires the exhaust duct to be insulated in unconditioned spaces and terminated with a dampered hood on the exterior; if your roof or soffit termination is missing or improperly sealed, the inspector will fail the HVAC rough inspection. Henderson's Building Department requires a separate mechanical permit for new exhaust fans with ductwork, even if it's a small bathroom fan upgrade. The duct sizing must match the fan CFM (cubic feet per minute) rating: a typical bathroom fan is 80-110 CFM, requiring 4-inch rigid or flexible duct. Improper duct size, excessive duct length (over 25 linear feet), or 90-degree bends without proper slope will fail inspection. The city's checklist also notes that flex duct must be supported every 3 feet and cannot be buried in insulation.

Waterproofing assemblies for tub-to-shower conversions are the single biggest inspection trigger in Henderson. IRC R702.4.2 requires continuous waterproofing behind tile in wet areas, and the code specifies either a sheet membrane (like Kerdi) or a liquid membrane system (like RedGard) over cement board, not just drywall and grout. Many Henderson inspectors have flagged projects where homeowners installed tile directly over drywall with only silicone caulk, which fails within 2-3 years as moisture wicks behind the tile. The city requires a waterproofing detail in the submitted plan that specifies the base material (cement board, DensShield, or equivalent), the membrane system and brand, the caulk schedule, and the transition to adjacent surfaces. The rough framing inspection includes a check of the waterproofing base, so you cannot proceed to tile without approval. If you're keeping the existing bathtub surround and only replacing a vanity or light fixture, no waterproofing work is triggered. However, if you're converting a tub to a walk-in shower, or removing a shower wall and rebuilding it, the entire assembly must meet current code — no 'grandfathering' for old backer board or failing membranes.

Three Henderson bathroom remodel (full) scenarios

Scenario A

Vanity, toilet, and tile swap in-place — Henderson bungalow, South End

You're replacing an old pedestal sink and floor-mounted toilet with a new vanity cabinet and low-flow toilet in the exact same footprint, and re-tiling the existing bathtub surround with new tile over the existing (intact) cement board. No plumbing fixture relocation, no new electrical circuits, no wall moves, and no change to the waterproofing assembly (the existing membrane and cement board are staying put). Henderson's Building Department classifies this as cosmetic bathroom work and does not require a permit. You can pull permits for just the tile work if you want documented proof that it meets code, but it's not mandatory. Cost: $0 permit fees; tile and vanity materials plus labor run $3,000–$6,000. Timeline: no plan review or inspections needed. Key local note: Henderson does not require a contractor license for cosmetic plumbing fixtures in owner-occupied homes, so an owner-builder or handyman can swap the vanity and toilet. However, if your new vanity requires relocating the drain (even 12 inches away), you cross into permitting territory and need a licensed plumber.

No permit required (in-place fixtures) | DIY or handyman acceptable | Tile over existing cement board | Total project cost $3,000–$6,000 | No permit fees

Scenario B

Tub-to-shower conversion with new drain relocation — West Side ranch, new exhaust ductwork

You're demolishing an existing alcove bathtub, relocating the drain 4 feet to the left (new curb location for a walk-in shower), installing a new waterproofing assembly (cement board + Kerdi sheet membrane + tile), and running a new exhaust fan duct through the attic because the old bathroom exhaust is venting into the attic (code violation). This project triggers the full permitting cycle: building permit (structural/framing review of the new shower curb), plumbing permit (drain relocation, trap arm sizing, vent connection), electrical permit (if adding a new GFCI outlet near the shower), and mechanical permit (new exhaust fan and ductwork termination). Plan review runs 2-3 weeks in Henderson. Rough framing inspection happens before the waterproofing membrane is applied; rough plumbing inspection covers the new drain line and vent connection before drywall closure; rough mechanical inspection verifies the exhaust fan ductwork and exterior termination before the fan is run. Final inspection occurs after tile and trim are complete. Permit fees are roughly $150 for building, $200 for plumbing, $100 for mechanical = $450 total, based on Henderson's typical 1-2% of project valuation (a $12,000–$15,000 remodel). Timeline: 4-6 weeks from permit pull to final approval, assuming no rejections. Key local detail: Henderson's Building Department requires the exhaust duct to be insulated (R-4 minimum) if it runs through an unconditioned attic, and it must terminate with a dampered hood on the roof or soffit with at least 1/4-inch clearance around the duct opening to prevent condensation backup.

Permit REQUIRED (fixture relocation + new duct) | Licensed plumber mandatory | Waterproofing detail required (Kerdi + caulk schedule) | Rough plumbing, electrical, mechanical, final inspections | Building $150 + Plumbing $200 + Mechanical $100 = $450 permits | Project cost $12,000–$18,000

Scenario C

Full bathroom gut with wall relocation — older downtown brick home, adding new 20-amp circuit

You're gutting a 1960s bathroom: removing the wall between the bathroom and adjacent hallway closet to expand the footprint, relocating toilet, sink, and tub to new positions, installing new plumbing and vent stack, adding a 20-amp dedicated circuit for a heated floor mat and exhaust fan, installing new waterproofing assembly, and upgrading the exhaust to code-compliant ductwork. This is a full-scope permit project. Because the home was built before 1978, it also triggers lead-paint disclosure and safe work practices (isolation, wet methods, HEPA vacuuming) per EPA RRP Rule and Kentucky law. The building permit covers the wall relocation (structural engineer review may be needed if the wall is load-bearing — common in older brick homes), framing, drywall, and overall scope. Plumbing permit covers all new drain, supply, and vent lines. Electrical permit covers the new 20-amp branch circuit and GFCI/AFCI outlets. Mechanical permit covers the exhaust fan and ductwork. Additionally, a lead-safe work permit or notification may be required by Henderson if the city enforces EPA RRP Rule compliance. Plan review is typically 3-4 weeks. Inspections: framing (before any wall closure), rough plumbing (before vent stack is enclosed), rough electrical (before drywall), rough lead-paint (if applicable), waterproofing assembly (before tile), and final. Total permit fees: approximately $600–$800 depending on valuation ($18,000–$25,000 project). Timeline: 6-8 weeks from submission to final. Key local detail: Henderson's Building Department requires that any structural wall relocation in homes older than 1945 include a foundation assessment, as older brick homes sometimes have inadequate footings; your contractor must document that the new wall will have proper bearing on the foundation or rim joist.

Permit REQUIRED (wall relocation + fixture moves + new circuits) | Licensed contractors mandatory (plumbing, electrical) | Lead-safe work required (pre-1978) | Framing, plumbing, electrical, mechanical, final inspections | $600–$800 permits | Project cost $18,000–$28,000 | Owner-builder can act as general contractor but cannot perform plumbing or electrical

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Henderson's waterproofing assembly standards for shower conversions

Henderson's Building Department has tightened waterproofing enforcement over the past 5 years due to mold complaints in older homes where showers were remodeled with inadequate membranes. The city's current standard, per IRC R702.4.2 and Kentucky amendments, mandates a continuous sheet or liquid membrane system behind tile in wet areas — not just drywall tape and joint compound. The most common system is cement board (1/2-inch minimum, fastened every 8 inches with corrosion-resistant fasteners) topped with a sheet membrane like Kerdi, Wedi, or Schluter, or a liquid membrane like RedGard or Aqua Defense. The membrane must extend at least 12 inches above the shower head spray zone and 6 inches onto adjacent dry walls. Grout alone does not constitute waterproofing; it is porous and will wick moisture into the substrate behind the tile.

Henderson inspectors specifically require the waterproofing detail to be submitted with the permit application and again verified during the rough framing inspection before the membrane is installed. This means you cannot start waterproofing work without sign-off on your plan. The inspector will check that the cement board is not installed over old drywall (a common shortcut that fails), that fastener spacing meets code, and that the membrane system is appropriate for the wall height and spray pattern. If you're using a liquid membrane, the inspector will verify that it's applied per manufacturer specs — typically 2-3 coats with proper drying time between coats. Caulk is required at all inside corners (150-degree corners) and transitions between the tile field and trim, using a polyurethane or silicone caulk rated for wet areas (not acrylic, which fails in bathrooms). The caulk schedule must be detailed in the plan.

A critical detail many Henderson homeowners miss: if you're replacing an existing shower surround that is failing (peeling waterproofing, moldy drywall), you may need to use an antimicrobial primer under the new cement board to prevent recurring mold. The city's Environmental Health Division sometimes flags this in commercial bathrooms but not always in residential; however, contractors working in Henderson increasingly recommend it for pre-1990 homes where the old system failed. The cost is minimal (antimicrobial primer adds $50–$100) and provides insurance against the same failure repeating.

Electrical GFCI and AFCI requirements in Henderson bathrooms

Henderson's electrical code, per NEC Article 680 (special occupancies), requires Ground Fault Circuit Interrupter (GFCI) protection on all bathroom receptacles. This includes countertop outlets, outlets within 6 feet of a bathtub or shower, and any outlet in the bathroom zone. GFCI devices trip in milliseconds if they detect a current imbalance (as would occur if someone touched a faulty appliance while standing on a wet floor), making electrocution nearly impossible. The city does not allow GFCI protection via breaker alone; point-of-use GFCI outlets (outlets with GFCI buttons on them) or GFCI-protected outlets downstream from a GFCI breaker are both acceptable, but the outlet itself must be GFCI-rated. If you replace outlets in an existing bathroom, you must upgrade them to GFCI-compliant outlets; grandfathering old unprotected outlets is not allowed.

Additionally, bathrooms in homes built after 2008 may require Arc Fault Circuit Interrupter (AFCI) protection on the bathroom lighting and exhaust fan circuits. AFCI devices detect dangerous arcing conditions before they cause fires. Henderson's Building Department applies AFCI requirements based on the 2021 IBC, which mandates AFCI protection on all branch circuits that supply outlets or lights in bathrooms. This means if you're adding a new 20-amp circuit for a heated floor mat, that circuit must be protected by a combination AFCI/GFCI breaker (a single breaker that provides both protections). The cost difference is minimal — a combination breaker is roughly $40–$60 versus $15–$20 for a standard breaker — but it's a common rejection item on electrical plans that omit the AFCI requirement.

Henderson inspectors will review electrical plans for GFCI outlet locations, breaker labeling (the panel must be labeled showing which breaker serves which bathroom circuit), and proper wire gauge for the circuit amperage (12 AWG for 20 amps, 14 AWG for 15 amps). If you're upgrading from a 100-amp to a 200-amp service during a major remodel, the electrical rough inspection includes a check of the new meter base, service entrance, and grounding system. A mistake many owners make: running a new outlet for a heated towel rack or exhaust fan on an existing 15-amp lighting circuit that is already at capacity — this overloads the circuit and fails inspection. A dedicated circuit is required if the load exceeds available capacity.

City of Henderson Building Department
Henderson City Hall, 101 S Main St, Henderson, KY 42420
Phone: (270) 831-1389 (Building Department main line; verify with city hall) | https://www.hendersonky.gov (navigate to Building Department or Permits section for online submission details; specific portal URL varies — call or visit to confirm)
Monday-Friday, 8:00 AM - 5:00 PM (closed weekends and city holidays)

Common questions

Can I do a bathroom remodel myself if I own the home?

Kentucky law allows owner-builders to perform work on owner-occupied single-family homes without a contractor license. However, Henderson's Building Department still requires permits and inspections for work that triggers the code (fixture relocation, new electrical circuits, ductwork, wall moves). You can act as the general contractor and perform some work yourself — demolition, framing, drywall, tile installation — but plumbing and electrical work must be performed by licensed contractors in Henderson. If you have plumbing or electrical questions, contact the city's Building Department directly; policies can vary year to year based on the current inspector.

How long does plan review take for a bathroom remodel in Henderson?

Henderson's typical plan review timeline for a bathroom remodel is 2-3 weeks for a straightforward fixture relocation or conversion, and 3-4 weeks for a full gut with wall moves or structural changes. The review time assumes complete, code-compliant plans submitted the first time. Rejections (missing waterproofing detail, incorrect trap arm sizing, missing GFCI notation) reset the clock by 5-7 days. Expedited review is not available for residential bathrooms in Henderson, but submitting detailed plans with waterproofing assemblies, electrical layouts, and exhaust duct termination locations front-loads the review and reduces back-and-forth.

Do I need a separate permit for the exhaust fan?

If the exhaust fan is new and includes ductwork (not just replacing an existing fan in-place with the same duct), Henderson requires a separate mechanical permit. The mechanical permit covers the fan CFM rating, duct sizing, insulation requirements, and exterior termination. The fee is typically $75–$125 and is included in most general remodel permit estimates. If you're simply replacing an existing fan with a new fan using the existing ductwork, you generally don't need a separate permit, but verify with the city's Building Department.

What happens if I remove a wall in my bathroom and don't get a permit?

Removing a wall without a permit in Henderson is a serious code violation. If the wall is load-bearing (common in older homes), an unpermitted removal can cause structural failure, settling, and cracking in the foundation and upper floors — costs to repair can exceed $10,000. The city's Building Department can issue a stop-work order, require removal of the new drywall to expose the framing for a late inspection, and assess fines of $250–$500 plus double permit fees. Additionally, when you sell the home, the unpermitted wall removal must be disclosed, and buyers can demand remediation or a price reduction. Always get a framing/structural permit if any walls are being modified.

Are there any special considerations for pre-1978 homes in Henderson?

Yes. Homes built before 1978 may contain lead-based paint. If your bathroom remodel disturbs painted surfaces (walls, trim, doors), the EPA RRP Rule requires lead-safe work practices: isolation of the work area, wet methods (no dry sanding), HEPA vacuuming, and safe cleanup. Kentucky enforces EPA RRP Rule requirements. Henderson's Building Department may require documentation of lead-safe training or certification before you proceed. Additionally, any drain or supply line relocation must use lead-free solder (95/5 tin/antimony); lead solder is no longer legal. If you're uncertain whether your home contains lead paint, a certified lead inspector can test for as little as $200–$300.

What's the most common reason bathrooms fail inspection in Henderson?

The single most common rejection is inadequate or missing waterproofing documentation and assembly. Many homeowners and contractors assume that tile and grout alone will protect a shower, but Henderson's inspectors require a waterproofing detail in the permit plan that specifies the membrane system (cement board + sheet membrane, or liquid membrane), caulk schedule, and transitions. The second most common rejection is improper exhaust fan termination (venting into the attic instead of outdoors) or missing dampered hood on the roof/soffit. The third is GFCI outlet locations not marked on the electrical plan. Submitting plans with these three items detailed upfront cuts rejections dramatically.

Can I install a heated floor mat in my bathroom without upgrading the electrical service?

If your existing bathroom electrical load is at or near capacity, adding a heated floor mat likely requires a new dedicated 20-amp circuit. Heated mats typically draw 15-20 amps, which cannot be added to an existing 15-amp lighting circuit. Running the new circuit requires electrical permit and rough inspection. If you have extra capacity on your electrical panel, a licensed electrician can add the circuit relatively cheaply (roughly $300–$600 including permit and inspection). If your panel is full or service is at capacity, you may need to upgrade from 100-amp to 200-amp service, which costs $2,000–$4,000 and requires a separate service upgrade permit.

What's the cost of permits for a full bathroom remodel in Henderson?

Permit fees for a full bathroom remodel in Henderson typically run $400–$800, calculated as 1-2% of the project valuation. A $15,000 remodel might cost $300–$500 in permits; a $25,000 remodel might cost $600–$800. The fee is broken down by permit type: building (framing/structural), plumbing (drain/supply/vent), electrical (circuits/outlets), and mechanical (exhaust/ductwork). Each is paid separately but can be combined under a single project permit. Inspections are included in the permit fee; there are no separate inspection fees.

Do I need a survey or site plan for a bathroom remodel?

No. Bathrooms are interior spaces, and Henderson does not require surveys or lot diagrams for interior remodels. If your remodel includes exterior work (new exhaust duct termination on the roof or soffit), the location should be noted on the architectural plan so the inspector can verify termination clearances, but no survey is needed. For reference, a survey for property lines runs $300–$500 and is only required for boundary disputes or exterior additions near property lines.

How do I start the permit process in Henderson?

Contact the City of Henderson Building Department at (270) 831-1389 (verify the current number with city hall) or visit Henderson city hall at 101 S Main St to request permit application forms and a checklist. Bring photos of the existing bathroom, dimensioned floor plans showing old and new fixture locations, and descriptions of any plumbing, electrical, or structural changes. The department will advise on whether your project needs building, plumbing, electrical, or mechanical permits. Prepare a cost estimate (this helps the permit office calculate fees). Some jurisdictions accept online permit applications; confirm with Henderson whether they offer e-permits for bathroom remodels or if in-person submission is required.

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 Henderson Building Department before starting your project.

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