Bathroom Remodel Permit in Houma, LA (2026)

Research by DoINeedAPermit Research Team · Updated May 2026

The Short Answer

A full bathroom remodel in Houma requires a permit if you are moving fixtures, adding electrical circuits, installing new exhaust ventilation, or converting between tub and shower. Surface-only work — tile, vanity, or faucet replacement in place — does not require a permit.

Houma's Building Department follows the Louisiana State Uniform Construction Code (based on the 2015 IBC/IRC), but the city enforces one critical local twist: because Houma sits in 2A climate (hot-humid with 100% annual humidity and coastal settling soil), the city requires explicit documentation of shower and tub waterproofing system BEFORE issuing permits — not just during inspection. This is stricter than many neighboring parishes. You must specify whether you're using cement board plus liquid membrane, tile backer board with polyethylene sheeting, or prefabricated shower pan assembly on the permit application itself. The city also requires GFCI and AFCI protection per the 2015 NEC code, and any exhaust fan duct must terminate to the outside (not into an attic or soffit) — a rule that trips up many homeowners in this region. Houma's permit office typically accepts applications online or in-person at City Hall, with plan review taking 2-5 weeks depending on whether electrical and plumbing are bundled in the same permit or filed separately. The city does allow owner-builders to pull permits for owner-occupied homes, but you will still need to schedule and pass all required inspections (rough plumbing, rough electrical, framing, and final).

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

Stop-work order issued by the city: $250–$500 fine, plus forced permit pullback and plan resubmission before work resumes.
Insurance claim denial: insurer refuses to cover water damage or electrical failure in unpermitted bathroom work; you absorb the full cost ($5,000–$15,000+ for mold remediation or rewiring).
Home sale disclosure hit: Louisiana requires disclosure of unpermitted work; buyer or title company can back out or demand escrow holdback ($2,000–$10,000).
Lender refinance block: mortgage servicer discovers unpermitted bathroom during appraisal or title review; refinance denied until work is permitted and inspected retroactively.

Houma bathroom remodel permits — the key details

Houma's Building Department administers permits under the Louisiana State Uniform Construction Code (LSUCO), which adopts the 2015 IBC and 2015 IRC with state amendments. For bathroom remodels, the pivotal trigger is fixture relocation, electrical work, ventilation changes, or tub-to-shower conversion. If you are only replacing a toilet, faucet, or vanity in the same location — and the walls, plumbing vents, and exhaust system stay untouched — you do not need a permit. However, if you are moving the toilet to a new wall, adding a second exhaust fan, upgrading the electrical panel for new circuits, or converting a tub alcove to a walk-in shower, you must pull a permit. The reasoning is that fixture relocation changes drain slope, trap arm length, and load paths on framing; electrical work triggers GFCI/AFCI requirements; and tub-to-shower conversions trigger waterproofing assembly code (IRC R702.4.2), which in a humid climate like Houma is non-negotiable. Houma's humid 2A climate means standing water, high evaporation into walls, and coastal settlement — all reasons the city is strict about waterproofing documentation upfront.

The single most common rejection reason in Houma is failure to specify the shower or tub waterproofing system on the permit application or plan. The 2015 IRC requires a continuous water-repellent membrane behind tile in a wet area, plus a drainage plane. You must choose one of three approaches: (1) cement board (e.g., Durock, HardieBacker) glued and screwed, then topped with liquid-applied membrane (Redgard, Kerdi, etc.) — the most common in Houma; (2) waterproof drywall (e.g., Aqua-Defense) with sheet membrane; or (3) pre-assembled waterproof shower pan system (linear drain pan, built-in slope, sealed seams). When you apply for the permit, your plan must state which one you are using, and you must have the product spec sheets ready. The inspector will verify the material is installed per manufacturer and code during the rough-in inspection (before tile). If your plan is vague — 'waterproofed per code' — the city will kick it back and delay you 1-2 weeks. Have your contractor or tile supplier provide the product name and installation method in writing before you file.

Electrical work in a bathroom has two strict code requirements that differ from other rooms: GFCI (ground-fault circuit interruption) protection and AFCI (arc-fault circuit interruption) protection. Per the 2015 NEC (adopted in Louisiana), all 120V, single-phase, 15A and 20A circuits serving bathroom areas must have GFCI protection. This applies to all outlets within six feet of the sink, and typically extends to the exhaust fan circuit as well. If you are adding a new exhaust fan or relocating the bathroom exhaust vent, the circuit must be new and GFCI-protected. Additionally, per recent code changes, bedroom circuits must have AFCI protection, and many local inspectors extend this to adjacent bathroom circuits as a best practice. On your electrical plan (if you file separately from plumbing), clearly label which circuits are GFCI and which are AFCI. The building inspector will check for the breaker type during rough inspection and again at final. If you wire the bathroom without GFCI and the inspector catches it, you will be forced to cut in a GFCI breaker or outlet before final approval — a costly and time-consuming rework.

Exhaust fan ventilation is another frequent deficiency in Houma permits. IRC M1505 requires that bathrooms have mechanical exhaust ventilation that removes moisture to the outside (not to an attic, soffit, or crawl space — a common mistake in this region). For a full remodel, you should confirm that the exhaust duct is sized to the fan (a 50-80 CFM fan typically needs 3-inch or 4-inch flexible duct), that it is insulated (to prevent condensation in humid climates), and that it terminates to a roof or exterior wall with a dampered hood. Many homeowners in Houma still run exhaust into the attic, which traps moisture and accelerates mold growth; the city inspector will reject this. When you apply for the permit, specify the fan CFM rating, duct diameter, and termination location on the plan. If the plan is missing these details, the city will request more information before issuing the permit. Installation must be verified during the rough-in inspection before drywall is closed.

Timeline and inspection sequence in Houma typically run 4-8 weeks from permit issuance to final approval, depending on whether you file combined plumbing/electrical or separate permits and how quickly the plan review phase completes. Expect plan review to take 2-5 weeks if the city needs clarifications on waterproofing, GFCI details, or duct termination. Once approved, you schedule a rough plumbing inspection (toilet rough-in, drain slope, vent placement), then rough electrical (GFCI circuits, exhaust wiring), then framing/drywall inspection (if walls are being moved), and finally a final inspection after tile, fixtures, and trim are installed. Each inspection must pass before the next stage; if the inspector finds a code violation, you get a "correction notice" and must schedule a re-inspection (often 1-2 weeks later). Houma's Building Department uses an online permit portal and phone scheduling; you can submit the permit application and plans online, but plan review staff will contact you via email or phone if clarifications are needed. The building department is typically open Monday–Friday, 8 AM–5 PM; hours and contact info should be verified directly with City Hall.

Three Houma bathroom remodel (full) scenarios

Scenario A

Vanity and toilet swap in place, new tile backsplash — East Houma bungalow

You are replacing an existing toilet and vanity with new ones in the same locations, and adding ceramic tile as a backsplash above the new vanity. The drain and water supply lines are not being moved; the exhaust fan stays; and no walls are touched. This work is exempt from permitting under Houma's code because there is no fixture relocation, no electrical circuit addition, and no change to the plumbing vent. You do not need to pull a permit. However, if the original wall was plaster or un-waterproofed drywall and you are now tiling a wet area, some inspectors may ask if the wall behind the tile has a membrane — but since no permit is required, the city will not inspect. This is a surface-cosmetic job: purchase your vanity, toilet, and tile at the local supply house, hire a licensed plumber to disconnect and reconnect in place (or do it yourself if you are comfortable with plumbing), and have the tile installed. Total cost is typically $2,000–$5,000 (vanity $400–$800, toilet $300–$600, tile and labor $800–$3,000); zero permit fees. No inspections required. You can start and finish the work without any city involvement.

Scenario B

Full shower remodel with tub-to-shower conversion, new drain and P-trap — Broadmoor neighborhood

You are gutting a 5x7 bathroom with an old cast-iron tub and converting it to a walk-in shower with a linear drain. The new drain line will be relocated 18 inches to the left (new trap arm, new vent connection), the water supply will be rerouted for a new pressure-balanced valve, and a new waterproofed tile shower enclosure will replace the tub alcove. This is a full-scope bathroom remodel and requires a plumbing permit. You must file a permit application with the City of Houma Building Department, either online via the city portal or in-person at City Hall. The application will ask for the property address, contractor name (if licensed) or owner-builder declaration, scope of work, and estimated valuation. For a bath remodel with fixture relocation and tile enclosure, Houma typically values the work at $8,000–$15,000 depending on materials and finishes. The permit fee is typically 1.5-2% of valuation: roughly $120–$300 for the plumbing permit. You must also file an electrical permit if you are adding a new exhaust fan or upgrading circuits (add another $100–$200). On the plumbing plan, you must show: (1) the new drain line with slope (minimum 1/4 inch per 12 inches), (2) trap arm length (maximum 5 feet from trap to vent per IRC P3103.2), (3) the vent connection, and (4) the waterproofing system — specify cement board plus liquid-applied membrane, or pre-fab pan, or waterproof drywall plus sheet membrane. The city will flag generic waterproofing descriptions and ask you to resubmit with product names. Plan review takes 2-3 weeks. Once approved, you schedule a rough plumbing inspection (drain slope, trap, vent verified before concrete/subfloor is covered), then rough electrical (if exhaust wiring is in progress), then tile and waterproofing inspection (inspector checks that the membrane is installed per code before drywall/finish), and finally a final inspection after grouting and fixtures are installed. Total timeline: 4-6 weeks from permit issuance to final approval. Cost: $5,000–$12,000 plumbing and tile materials, plus $150–$400 in permit fees, plus $800–$2,000 in labor if you hire a licensed plumber.

Scenario C

Surface tile refresh, new vanity, existing electrical reuse — historic downtown Houma apartment

You are replacing wall and floor tile, installing a new vanity in the same location, and keeping the toilet and all plumbing connections unchanged. However, your building is a pre-1978 structure in Houma's historic district. The outcome depends on two factors: (1) whether you are disturbing lead paint, and (2) whether the historic district overlay has special approval requirements. If you are only removing tile and vanity without touching walls or substrate, and the pre-1978 paint is not being disturbed, you may not need a permit under Houma's code — this is surface cosmetic work. However, if you are scraping, sanding, or demolishing walls that might contain lead paint, Louisiana's lead-safe work practice rules (LSA R.S. 40:1300.771) require notification and RRP certification. The city does not require a separate permit for lead-safe work, but you must follow state rules: use a certified lead-safe contractor or take RRP training yourself, contain dust with plastic sheeting, and dispose of lead-contaminated debris properly. Additionally, if your building is in Houma's historic district (check with the city's Planning and Zoning Division), any visible exterior changes — such as a new exterior exhaust vent — may require historic district design review approval before the permit is issued. This can add 2-4 weeks to the timeline. If you are staying fully interior and not adding ventilation, and if you are not disturbing lead paint, you can proceed without a permit. But if there is any doubt, contact the Building Department and Planning Division to confirm. If historic review is required, you will need to file a separate COA (Certificate of Appropriateness) application; this is not a permit fee but an additional design review. Best practice: call the city before demolition to clarify whether your scope triggers lead-safe or historic review. If both are clear, this is a $2,000–$4,000 cosmetic remodel with $0 permit fees. If historic or lead-safe rules apply, timeline extends and you may incur $300–$800 in lead-safe work or design-review fees.

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Why waterproofing documentation is stricter in Houma than in drier climates

Houma sits in the heart of Terrebonne Parish, roughly 50 miles south of Baton Rouge, with a hot-humid 2A climate (annual relative humidity near 100%, frequent afternoon thunderstorms, and high groundwater levels). The underlying soil is Mississippi alluvium — organic, settled coastal clay with high moisture retention. This combination means bathroom moisture does not evaporate quickly; instead, it migrates into walls, attics, and framing cavities, accelerating mold growth and wood rot. Building code (IRC R702.4.2) requires a continuous water-repellent membrane behind all tile in wet areas, but in a drier climate like Phoenix or Denver, inspectors may accept that rule perfunctorily. In Houma, inspectors apply it strictly because water damage and mold claims are statistically higher in this region.

When you pull a bathroom remodel permit in Houma, the city explicitly requires you to name the waterproofing method — cement board plus liquid membrane, pre-fab pan, or waterproof drywall with sheet membrane — before the permit is issued. This is not a vague 'waterproofed per code' statement; you must cite the product. For example: 'Durock cement board, 1/2-inch, installed per ASTM C1288, plus Redgard liquid-applied membrane per manufacturer specifications.' The inspector will then verify during rough-in that the material is installed correctly, that seams are sealed, and that drainage is continuous. If you deviate from the approved method (e.g., you install regular drywall instead of cement board and then apply paint), the inspector will catch it and require you to tear out and redo. This upfront scrutiny prevents costly mold problems later.

In practice, most contractors in Houma use cement board plus liquid membrane for shower surrounds and pre-fab pans for shower bases — both are code-compliant and well-established in the region. Liquid membrane is popular because it bridges gaps between tiles and cement board, and it is easy to inspect. Pre-fab pans are fast but require careful slope and drain sealing. Some builders use Schluter Kerdi or Wedi systems, which are approved but more expensive. Whatever you choose, have the product spec sheets and installation manual ready when you submit the permit. This speeds up plan review and reduces rejection risk.

Plumbing trap arm and vent slope in Houma's coastal setting

One overlooked code issue in Houma bathroom remodels is trap arm length and slope. IRC P3103.2 sets a maximum trap arm length (the horizontal pipe from the trap to the vent) of 5 feet, and it requires a minimum slope of 1/4 inch per 12 inches downward toward the trap. If you are relocating a toilet or sink in a bathroom, the new trap arm must not exceed 5 feet; if it does, you must add an additional vent (a relief vent or re-vent) upstream, which complicates the framing and plumbing. In Houma's older homes (many built on pilings or with shallow crawl spaces), existing plumbing often runs under or through joists, and the slope may be compromised. When you remodel, if the new drain location is more than 5 feet from the existing stack vent, you may need to install a new vent line through the roof or wall. This is code-required and increases cost and complexity.

Houma's coastal setting also means that roof penetrations (for vents or exhaust ducts) must be sealed properly and must account for high wind loads. While Houma is not in the direct hurricane belt (that is further south and east), tropical storm surge and wind events are common. Any new vent or exhaust duct that penetrates the roof must use a flashing kit rated for wind, and must be sealed with roofing cement or equivalent. The building inspector will verify that the flashing is installed correctly and that the penetration does not leak. If you are doing a bathroom remodel that includes a new exhaust vent, confirm that the flashing is rated for wind and storm exposure. This is often overlooked and can lead to roof leaks.

For relocated drains in bathrooms, document the new trap arm length on your plumbing plan (measure it carefully, in feet and inches). If the trap arm is longer than 5 feet, note that a re-vent or relief vent is being added and show its location. The plan does not have to be drawn to scale, but it must be clear enough for the inspector to verify in the field. Many homeowners sketch the plan on graph paper with dimensions labeled; this is sufficient for Houma's permit office. If the plumber provides a plan as part of their bid, use that; otherwise, draw it yourself with dimensions and the plumber's sign-off.

City of Houma Building Department
Houma City Hall, Houma, Louisiana (verify exact address with city website or call)
Phone: (985) 873-6340 (confirm current number with city website) | https://www.houmala.gov/ (check website for permit portal or online submission link)
Monday-Friday, 8:00 AM - 5:00 PM (verify current hours locally)

Common questions

Do I need a permit to replace my toilet and faucet with new ones in the same location?

No. If the toilet and faucet are being swapped in place (same drain, same water supply lines, no wall changes) and you are not adding new electrical circuits or exhaust vents, this is considered a fixture replacement and does not require a permit in Houma. You can hire a plumber or do it yourself. However, if you are moving the toilet to a new wall or adding a bidet that requires a new supply line, you will need a plumbing permit.

What is the most common reason Houma Building Department rejects a bathroom remodel permit application?

The most common reason is vague or missing waterproofing specifications. If your plan says 'waterproofed per code' without naming the actual product (e.g., cement board plus Redgard, or a prefab shower pan), the city will ask for clarification. You must specify the manufacturer, product name, and installation method. Have your contractor or tile supplier provide product spec sheets when you submit the application to avoid delays.

Can I pull a bathroom remodel permit as an owner-builder in Houma, or do I need a licensed contractor?

Houma allows owner-builders to pull permits for owner-occupied residential properties. You do not have to hire a licensed contractor. However, you must sign the permit application as the owner-builder, you are responsible for ensuring all code compliance, and you must still schedule and pass all required inspections (rough plumbing, rough electrical, final). Plumbing and electrical work performed by you must comply with code, though many jurisdictions allow owner-builders to do plumbing but require a licensed electrician for electrical work; confirm with the city.

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

Plan review typically takes 2-5 weeks from the date you submit the application. If the city needs clarifications (e.g., waterproofing method, GFCI circuit layout, exhaust duct termination), you will receive a request for more information via email or phone, and you will have 5-7 days to respond. Once the city approves the plan, the permit is issued and you can schedule your first inspection. Total time from application to final approval is usually 4-8 weeks.

Do I need both a plumbing permit and an electrical permit for a full bathroom remodel?

Not necessarily. If your remodel only involves plumbing (fixture relocation, new drain, new exhaust vent), you pull a plumbing permit. If you are also adding new electrical circuits, upgrading the panel, or installing a new exhaust fan with a new circuit, you pull an electrical permit. Many contractors file both in one application; Houma's permit office allows this. Separate permits may be slightly cheaper ($150 plumbing + $100 electrical vs. $250 combined), but they require two inspections instead of one combined rough inspection. Confirm the process with the city.

What happens if I find a plumbing or electrical violation during my bathroom remodel that my contractor missed?

If the violation is discovered during plan review, the city will issue a correction notice and ask for a revised plan. If it is discovered during inspection, the inspector will issue a 'fail' and a correction notice; you must fix the violation and schedule a re-inspection (typically 1-2 weeks later). Violations commonly include trap arm length exceeding 5 feet, GFCI outlets missing, exhaust duct terminating into an attic instead of outside, or waterproofing membrane not sealed. Re-inspections are free; you just need to correct the issue and call to schedule.

Is my pre-1978 bathroom remodel subject to lead-safe work rules in Louisiana?

Yes. If your home was built before 1978, any work that disturbs paint (demolition, sanding, scraping walls) must follow Louisiana lead-safe work practice rules (LSA R.S. 40:1300.771). This does not require a separate permit, but you must either use a certified lead-safe contractor or complete RRP (Renovation, Repair, and Painting) training yourself. Work must be contained with plastic sheeting, dust must be cleaned with HEPA vacuum, and lead-contaminated waste must be properly disposed of. Violations can result in fines up to $10,000 per day. If you are only removing tile (not scraping substrate) and not disturbing walls, lead-safe rules may not apply; when in doubt, contact the Louisiana Department of Health.

Can I install an exhaust fan that vents into my attic instead of outside?

No. IRC M1505 and Houma's adopted code require that bathroom exhaust vents terminate to the outside (roof or exterior wall), not into an attic, crawl space, or soffit. Venting into the attic in a humid climate like Houma causes condensation, mold, and wood rot. The building inspector will reject this during rough inspection. You must run the exhaust duct to the outside with a dampered hood and proper sealing. If an exterior wall vent is not feasible, you can run the duct up and through the roof, which requires flashing and sealing.

How much does a typical bathroom remodel permit cost in Houma?

Plumbing and electrical permits in Houma are typically based on a percentage of estimated project valuation (usually 1.5-2%) or a flat fee, whichever is higher. For a full bathroom remodel with fixture relocation and tile, Houma values the work at $8,000–$15,000; the permit fee is roughly $150–$300 for plumbing and $100–$200 for electrical. Some cities charge a flat $150–$250 per permit type. Contact the city directly for the current fee schedule. Do not pay permit fees in cash; the city typically requires check, credit card, or online payment.

What inspections are required for a bathroom remodel in Houma, and in what order?

The typical inspection sequence is: (1) rough plumbing (drain slope, trap, vent verified before the floor is covered), (2) rough electrical (GFCI circuits, exhaust wiring, panel upgrades), (3) framing/drywall (if walls are being moved), (4) waterproofing/tile (membrane and sealing verified before grout), and (5) final (all fixtures installed, trim in place, no code violations). Each inspection must pass before the next begins. You schedule inspections by calling the city or using the online permit portal. Inspectors typically come within 1-3 business days of the scheduled date. If an inspection fails, you have 5-7 days to correct the violation and request a re-inspection.

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 Houma Building Department before starting your project.

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