Bathroom Remodel Permit in Keller, TX (2026)

Research by DoINeedAPermit Research Team · Updated May 2026

The Short Answer

Any full bathroom remodel involving fixture relocation, new plumbing runs, electrical work, or wall changes requires a permit from the City of Keller Building Department. Surface-only work like vanity or tile replacement in existing locations may be exempt.

Keller's building permitting follows Texas state code but with one notable local wrinkle: the city requires a pre-submission consultation for any bathroom project involving plumbing or electrical changes before you file. This is not mandatory in every surrounding jurisdiction (Flower Mound, Arlington, Southlake vary on this). The consultation is free and typically takes 20 minutes — it catches common errors (trap-arm length, GFCI placement, exhaust-duct routing) before your application sits in the review queue. Keller Building Department processes permits in-person or by appointment; there is no online portal for submitting plans, which means a trip to City Hall is nearly always necessary. Plan review typically takes 5–10 business days for straightforward bathroom work, longer if structural framing is involved. The city adopts the 2015 IBC and IRC (as amended by Texas), so you're subject to IRC P2706 (drainage), IRC E3902 (GFCI in bathrooms), IRC M1505 (exhaust venting), and IRC R702.4.2 (shower waterproofing assembly). Keller's expansive clay soil (Houston Black clay common in central/southern parts of the city) doesn't directly affect bathroom interiors, but it informs why the city enforces water-intrusion rules strictly — exterior moisture management and interior waterproofing are non-negotiable.

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

Stop-work orders and fines up to $500 per day if the city discovers unpermitted plumbing or electrical work during a routine inspection or complaint.
Insurance denial on water damage claims if bathrooms were remodeled without permits and the adjuster uncovers unpermitted work in your records.
Mandatory permit-correction fees (double the original permit cost, typically $400–$1,600) if you're caught and forced to pull a retroactive permit before resale.
Title clearance issues at closing: buyer's lender will require proof of permitted work or a structural engineer's affidavit, costing $1,500–$3,000 and potentially killing the sale.

Keller, Texas bathroom remodel permits — the key details

The City of Keller Building Department enforces the 2015 International Building Code and International Residential Code as adopted by Texas, with minor local amendments. The biggest surprise: Keller does not have an online portal for bathroom permits. You must visit City Hall in person (or submit by appointment) with completed application forms and floor plans. Your application must include a site plan showing the bathroom location, a floor plan with all fixture locations (old and new), rough plumbing/electrical schematics if fixtures are moving, and a specification for the shower waterproofing system (cement board + membrane is the safest bet). Any fixture relocation — toilet, vanity, shower/tub — triggers the permit requirement. Fixture replacements in the same spot (new toilet in the old footprint, new faucet on the existing supply lines) are exempt. If you're moving a drain or supply line more than a few feet, you're in permit territory.

Plumbing code in Texas bathrooms is strict about trap arms and vent routing. IRC P2706 limits the distance from a trap to the vent stack: for a toilet, this is typically 6 feet horizontal; for other fixtures, it varies. Keller inspectors enforce this ruthlessly because improper venting leads to siphoning and vacuum issues that damage seals. If you're relocating a toilet or sink drain to the opposite wall, get a licensed plumber or carefully calculate the trap-arm run before you pull the permit. Exhaust fan venting is equally important: IRC M1505 requires continuous duct (no flex duct, which is a common DIY mistake) from the fan to termination outdoors, with at least 4 inches of clearance from soffit/siding. Keller's warm, humid climate makes mold growth a concern, so the city reviews exhaust plans carefully. A new exhaust fan or rerouting existing ducting requires permit review. Pressure-balanced mixing valves are required on new tub/shower supply lines; antiscald requirements are strict in Texas and Keller enforces them.

Electrical work in bathrooms is governed by IRC E3902 and the National Electrical Code (NEC). All outlets within 6 feet of a bathtub or sink must be GFCI-protected — this is non-negotiable and a common inspection fail. If you're adding a new outlet, an exhaust fan light, or a heat lamp, you'll need either GFCI outlets or a GFCI breaker protecting the circuit. You must also show how the circuit is grounded and where the breaker fits in the panel. Any new circuit requires electrical rough inspection before drywall closes. Keller Building Department typically requires a licensed electrician for bathroom electrical work if it involves a new circuit; some owner-builders can do the work if it's a simple outlet swap, but plans must show it clearly. AFCI (arc-fault) protection is required on all circuits in a bedroom; it's not required in bathrooms in Texas, but Keller's inspectors may ask you to include it anyway as a best practice.

Waterproofing is the make-or-break item for tub/shower work. IRC R702.4.2 requires a continuous, bonded water-resistant membrane behind the finish in any shower or tub enclosure. Cement board + liquid membrane or fabric membrane is the standard that Keller accepts; tile with grout alone is not code-compliant. Your permit application must specify the waterproofing system. If you're converting a tub to a walk-in shower, this is a major change (new drain location, new valve, new waterproofing assembly) and will trigger full plan review and multiple inspections. If you're simply re-tiling an existing shower stall, that work may be exempt, but once you move the valve or drain, you're in the permit lane. Keller's inspection checklist for waterproofing includes checking membrane continuity at corners, seams, and around the valve trim ring — inspectors do a hands-on test to confirm the membrane is properly adhered before final approval.

Timeline for a full bathroom remodel permit in Keller: submit application on Monday, expect a response by Friday (5–10 business days is typical). If there are plan deficiencies, the city will issue a request for corrections; you'll have 10 days to resubmit. Once approved, you can begin work immediately. Rough plumbing and electrical inspections happen before drywall; final inspection is after finish. The total permit-to-final cycle is typically 4–8 weeks if there are no red flags. If you're a licensed contractor, Keller assumes you know the code and moves faster. If you're a homeowner pulling as an owner-builder (which is allowed for your own occupied home), the inspector may ask more questions and take longer. Cost: Keller charges based on permit valuation. A typical full bathroom remodel (fixture relocation, new electrical, waterproofing) is valued at $8,000–$15,000; permit fee is roughly 1.5–2% of valuation, so $120–$300 for the building permit, plus $100–$200 for plumbing and electrical. Expect $350–$600 total in permit fees. Inspection fees are typically bundled into the permit cost.

Three Keller bathroom remodel (full) scenarios

Scenario A

Bathroom vanity and tile swap in place, no fixture moves — Keller subdivision

You're replacing an old vanity with a new one in the same footprint, removing old tile and installing new tile on existing walls, and swapping out the faucet. No plumbing lines are being rerouted, no new electrical circuits, no walls are moving. The existing exhaust fan stays. This work is exempt from permit in Keller as long as you're not opening walls for major inspection (like replacing water-damaged drywall behind the vanity that triggers structural review). The vanity swap is a surface-only swap; the faucet replacement is in-place. Texas and Keller do not require permits for cosmetic bathroom work. However, if you open a wall and discover water damage or mold, you'll need to report it and may trigger a larger remediation permit. Lead-paint testing is recommended if the home was built before 1978 (Keller has many homes from the 1990s onward, but some older subdivisions near the Keller High School area date back to the 1970s). Cost: zero permit fees; materials only ($2,500–$5,000 for vanity, tile, labor). Timeline: contractor can start immediately, no permit hold-ups.

No permit required | Cosmetic only | Lead-paint testing recommended if pre-1978 | Material + labor $2,500–$5,000 | No city inspections

Scenario B

Toilet and sink relocation to opposite wall, new drain line, same faucet supply repurposed — Keller Heritage addition

You're gutting the bathroom and moving the toilet and pedestal sink to the opposite wall. The old drain and supply lines will be abandoned. You'll run new 3-inch PVC for the toilet drain and new 1.5-inch for the sink drain back to the existing stack in the wall. This is where Keller's permit requirement kicks in: any fixture relocation triggers plumbing permit review. The city will examine your trap-arm distance (toilet to vent stack must be within 6 feet horizontal; IRC P2706). If the opposite wall is more than 6 feet away horizontally, you'll need to relocate the vent stack or install a loop vent, which adds cost and complexity. Keller inspectors are strict on vent routing because the city's humid climate and older clay-based drainage fields mean that improper venting leads to vacuum siphoning and seal failure. You'll also need to show the new drain location on a floor plan and confirm the drain doesn't conflict with the toilet flange location. The sink faucet supply can often be reused if it's long enough; if you're moving more than 3 feet, assume new supply lines. New supply lines require pressure-balanced valve installation (anti-scald). Your plumbing plan must show trap arm length, vent routing, and new valve specification. Keller will issue a plumbing permit ($100–$200), schedule a rough plumbing inspection before wall closure, and a final inspection after connections are tested. Cost: permit $100–$200, plumber $1,500–$3,000 (depending on complexity and re-vent need), total project cost $6,000–$10,000. Timeline: 5–10 days for permit review, then rough inspection within 3 days of roughing-in, final inspection within 3 days of completion. Total elapsed time 3–6 weeks.

Scenario C

Tub-to-shower conversion with new exhaust duct and two new electrical circuits (heat lamp, outlet) — Keller master bath remodel

You're converting an existing bathtub to a walk-in shower. This is a major change: new drain location (likely moved or repositioned from the tub), new waterproofing assembly (cement board + liquid membrane + tile), new mixing valve (pressure-balanced), new exhaust fan with relocated ductwork, and two new electrical circuits (one for a heat lamp, one for a 20-amp outlet). This project requires a full permit with separate reviews for plumbing, electrical, and building (waterproofing). Keller Building Department will ask for a detailed floor plan showing old and new drain locations, a plumbing schematic showing trap arm length and vent routing to the stack, an electrical plan showing the new circuits, breaker assignments, GFCI protection (required for the outlet), and a specification for the waterproofing system (cement board + XL membrane or similar branded system). The exhaust fan duct must be continuous (not flex duct, which traps moisture) and must terminate outdoors with a damper; you'll need to show the duct routing from the fan location to the exterior termination. IRC M1505 requires the duct be at least 4 inches diameter and sloped downward toward the exterior. Any duct terminating into the soffit or attic space will be rejected. The waterproofing inspection is the final hurdle: an inspector will verify the membrane is properly adhered at corners, seams, and around the valve trim ring before tile is installed. Keller enforces this strictly because tub-to-shower conversions are a common source of water intrusion in Texas homes. Your permit will require a building permit ($150–$250), a plumbing permit ($100–$200), and an electrical permit ($75–$150). Total permit fees $325–$600. You'll need a licensed plumber (Keller does not allow owner-builders to do new drain lines) and a licensed electrician (owner-builder electrical is limited to simple outlet swaps on existing circuits; new circuits require a licensed electrician). Rough plumbing inspection, rough electrical inspection, waterproofing inspection (before tile), and final inspection. Cost: permits $325–$600, plumber $2,000–$3,500, electrician $800–$1,500, tile and materials $2,000–$4,000, total project $5,000–$10,000 or more. Timeline: 5–10 business days for permit review, rough inspections within 1 week, waterproofing review before tile closure, final within 1 week of tile completion. Total elapsed time 6–10 weeks.

Every project is different.

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Keller's tub-to-shower conversion waterproofing challenge (and why inspectors care so much)

Keller sits on expansive Houston Black clay in the southern portions of the city and alluvial soils in the north. This clay is prone to moisture retention and movement, which means that any interior water intrusion (a leaking shower or failed waterproofing) is a serious problem. Water seeping into the wall cavity can cause mold growth, structural rot, and foundation stress over time. Keller inspectors are trained to be skeptical of waterproofing shortcuts, and tub-to-shower conversions are among the most common sources of problems because homeowners often assume old tile and grout are sufficient without a membrane.

IRC R702.4.2 requires a continuous, bonded water-resistant membrane behind all tile in a shower enclosure. This means cement board (not drywall) with a waterproof membrane — either liquid-applied or fabric-backed. The membrane must extend from the floor up the walls to at least 72 inches above the floor (or to the top of the enclosure if higher). It must be continuous at corners and seams. Keller inspectors will request a photo or on-site inspection of the membrane before tile is installed. If you use a cheap or improper system (like plastic sheeting or standard tar paper), the permit application will be rejected or the inspection will fail.

The most common mistake: running new PVC drain line to an old, sub-code shower base. If you're converting a tub to a shower, the new drain location may not align with the existing base, or the base may be cracked or damaged. Keller requires a new, code-compliant pan or a sloped floor with proper drainage to a trap. Pre-sloped pans with integrated drains are easiest and most reliable. Linear drains are also acceptable if properly sloped. The drain must slope toward the outlet at least 1/8 inch per foot (IRC P2706). Trap-arm distance from drain to vent stack is critical: the toilet flange drain is typically 3 inches, the sink is 1.5 inches, but a shower drain is also 2 inches; the trap arm from a shower drain to the vent must be within 5 feet horizontal. If the shower is being relocated far from the existing vent stack, you may need to install a loop vent or relocate the vent entirely — adding $500–$1,500 to the project.

Electrical safety in Keller bathrooms: GFCI, AFCI, and why the inspector asks so many questions

Texas state code and Keller Building Department both enforce the National Electrical Code (NEC), which requires GFCI protection for all outlets within 6 feet of a bathtub or sink in a bathroom. This includes outlets behind the vanity, outlets for a heat lamp or exhaust fan, and any dedicated outlet. GFCI breakers are common in Keller; some homeowners and electricians install individual GFCI outlets instead. Both are code-compliant. The key is that the inspector must see proof on the electrical plan or in the panel itself. If you're adding a new outlet in the bathroom, the electrician must either install a GFCI outlet or install a GFCI breaker protecting the circuit. If you're using a standard circuit breaker, the circuit will fail inspection.

AFCI (arc-fault circuit breaker) protection is required on all circuits in bedrooms per the NEC, but not in bathrooms in Texas. However, Keller Building Department may recommend AFCI protection for bathroom circuits as a best practice, especially if the circuit serves multiple rooms or if the electrician is already in the panel. AFCI breakers are more expensive ($30–$50 vs. $5–$10 for a standard breaker), so it's worth asking the electrician upfront whether Keller is requiring or recommending them.

The most common electrical rejection in Keller bathroom permits: the electrician runs a new circuit but forgets to label the breaker or show the circuit breaker assignment on the electrical plan. Keller requires a clear diagram of where the new circuit terminates in the main panel, what the amperage is, and how it's protected (15 amp, 20 amp, etc.). If you're installing a heat lamp, the electrician must also confirm it's on a 20-amp circuit (heat lamps draw significant power). Exhaust fans are typically 15 amp, but check the fan spec. The inspector will ask to see the breaker label and the circuit diagram before signing off.

City of Keller Building Department
210 Keller Parkway, Keller, TX 76248
Phone: (817) 743-4050
Monday–Friday, 8:00 AM–5:00 PM (closed city holidays)

Common questions

Can I pull a bathroom permit as an owner-builder in Keller?

Yes, Keller allows owner-builders to pull permits for owner-occupied homes. However, plumbing and electrical work has restrictions: you can replace fixtures in place (new toilet, faucet, vanity), but if you're relocating drains or adding new circuits, you typically need a licensed plumber and electrician. Call Keller Building Department at (817) 743-4050 to confirm what work you can self-perform. Many owner-builders pull the permit but hire licensed trades to do the work — you still get the permit savings without the liability.

How long does Keller's plan review take for a bathroom permit?

Typically 5–10 business days for a straightforward bathroom remodel. If the city has questions or finds deficiencies (like incomplete waterproofing specs or missing vent routing diagrams), they'll issue a correction request, and you'll have 10 days to resubmit. Complex projects involving vent stack relocation or major electrical work may take 2–3 weeks. Always call ahead to ask if your project is simple or complex before submitting.

Do I need a pre-submission consultation in Keller before I file for a bathroom permit?

It's not mandatory, but Keller Building Department offers a free, 15–20 minute pre-submission consultation. This is highly recommended for any project involving plumbing or electrical work. An inspector will review your floor plan and tell you whether your trap-arm distance is code-compliant, whether your vent routing will pass, and whether your electrical plan is clear. This prevents costly rejections later. Call (817) 743-4050 to schedule a consultation.

What if I tiled my shower 10 years ago without a permit and now I'm selling my house?

You should disclose the unpermitted work to the buyer. If the buyer's lender requires a permit or proof of compliance, you have a few options: pay a structural engineer ($1,500–$3,000) for an affidavit that the work is safe, pull a retroactive permit (Keller charges double fees, roughly $300–$600 for bathroom work plus reinspection), or offer a credit at closing. If you try to hide unpermitted work and the buyer discovers it during inspection or appraisal, the sale can fall apart. Better to address it upfront.

Is a permit required if I'm just replacing my bathroom faucet or toilet?

No. Replacing a faucet or toilet in the same location is exempt from permit — it's a fixture swap, not a plumbing modification. If you're changing the valve type (say, from a two-handle to a single-handle), that's still a swap and doesn't require a permit. Only if you're relocating the fixture (moving the toilet to a different spot) or adding a new fixture (extra outlet, exhaust fan) do you need a permit.

What's the cost of a full bathroom remodel permit in Keller?

For a full remodel involving plumbing, electrical, and building work, expect $325–$600 in permit fees. Building permit (waterproofing and framing) is $150–$250; plumbing is $100–$200; electrical is $75–$150. The actual project cost (labor and materials) is typically $5,000–$15,000 depending on scope and finishes. Permit fees are roughly 1.5–2% of the project valuation.

Can I use flex duct for my new exhaust fan in Keller?

No. IRC M1505 requires continuous duct (hard duct, either aluminum or rigid plastic) from the exhaust fan to the exterior termination. Flex duct is not allowed because it traps moisture and degrades over time. Keller inspectors will reject flex duct. The duct must be at least 4 inches diameter, sloped downward toward the exterior, and terminate outdoors with a damper. Ductwork running through the attic is acceptable, but terminating into the attic or soffit is not code-compliant.

Do I need a new water heater line for a bathroom remodel in Keller?

Only if you're relocating the sink or adding a new fixture far from the existing hot-water supply line. If you're moving a vanity across the bathroom, the plumber may need to run new hot and cold supply lines, which is standard plumbing work covered by the permit. If the new location is very far from the main line, the plumber may also recommend a point-of-use water heater, but that's optional. The permit covers supply-line relocation; a water heater upgrade is a separate decision.

What happens if the inspector finds mold behind my bathroom wall during the permit inspection?

Mold discovery during a permitted renovation triggers a hold on the permit until the mold is remediated. You'll need to hire a mold remediation company (licensed in Texas) to clean and treat the affected area. Keller Building Department may require a mold clearance letter from the remediation contractor before the permit is cleared to continue. This can add $500–$2,000 to the project cost and 1–2 weeks to the timeline. It's one reason pre-inspection and moisture management are critical in Keller's humid climate.

Is lead-paint testing required for a bathroom remodel in Keller?

Lead-paint testing is not required by Keller code, but if your home was built before 1978, lead paint may be present. If you're disturbing paint during demolition (which you will in a remodel), you should hire a lead-safe certified contractor or have the paint tested and safely encapsulated or removed. EPA Rule 40 CFR Part 745 requires disclosure if lead paint is disturbed; it's not a permit requirement, but it's a liability issue if you ignore it. Testing costs $200–$500; safe removal or encapsulation costs $1,000–$3,000.

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 Keller Building Department before starting your project.

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