Do I need a permit for a full bathroom remodel in
Hays, Kansas?

Hays bathroom remodel permits — the key details

The City of Hays Building Department enforces the 2015 International Residential Code (IRC) for bathroom remodels. The core rule: any change to plumbing fixture location, new electrical circuits, new exhaust fan installation, tub-to-shower conversion, or wall relocation requires a permit. IRC M1505 mandates exhaust fans rated for the bathroom's square footage (typically 1 CFM per square foot for wet areas or 50 CFM minimum) and requires ductwork termination to the exterior—no recirculation into the attic or soffit. IRC P2706 governs drain-pipe sizing and slope; a relocated toilet or lavatory drain must maintain 1/4-inch slope per foot and trap-arm length cannot exceed 6 feet from the vent stack (this is a frequent rejection reason in Hays reviews). IRC E3902 requires GFCI protection on all bathroom outlets within 6 feet of a sink or tub, and AFCI (arc-fault) protection on all 15- and 20-amp circuits serving the bathroom (bedroom circuits too, but not the bathroom circuit itself if it's a dedicated 20-amp bathroom circuit). Shower and tub waterproofing is governed by IRC R702.4.2: you must specify either a cement-board-and-membrane system (Schluter, Kerdi, etc.) or a pan liner with proper slope to drain. Hays does not accept unmembered drywall behind tub/shower—it must be moisture-resistant or cement-based backing. Pre-1978 bathrooms trigger Kansas's lead-safe work practices (dust containment, HEPA vacuuming, lab clearance post-demolition), adding $500–$1,500 to the timeline and cost.

Hays's Building Department does not issue over-the-counter bathroom permits. You must submit plans—at minimum, a rough floor plan showing old and new fixture locations, drain routing with trap-arm lengths marked, electrical layout showing GFCI/AFCI placement, and exhaust-fan duct termination point. The plan does not need to be stamped by an engineer or architect for owner-occupied residential work, but it must be clear enough for the inspector to understand the scope. Typical plan-review turnaround is 2–3 weeks; if the reviewer has comments (e.g., 'Trap arm exceeds 6 feet' or 'GFCI placement not shown on all affected outlets'), you'll revise and resubmit, adding another 1–2 weeks. Once approved, you receive a permit (valid for 6 months; construction must be substantially started within that window). Rough plumbing inspection happens after drain/water-supply rough-in and before drywall closes the walls; rough electrical inspection follows, then drywall, then final plumbing and electrical. Lead-safe work clearance testing (if required) happens before final occupancy.

Exemptions are narrow: surface-only work is permit-free. This means replacing a vanity in the same footprint, installing new tile or flooring, swapping a faucet or showerhead, replacing a toilet or sink in the existing location, painting, and even installing a pre-fabricated shower surround (if no new drains or electrical are involved) do not require permits. The moment you move a drain line, add a circuit, install a new exhaust fan, or cut into walls, you cross into permit territory. Some homeowners assume that patching drywall, running electrical inside existing walls, or adding a vent fan 'isn't a big deal'—Hays inspectors will cite it. Owner-builders are welcome to pull permits for owner-occupied homes; the Building Department will issue them without a contractor license, but the same plans, inspections, and code compliance apply.

Hays's climate and soil create two practical quirks. First, the 36-inch frost depth doesn't affect interior bathroom framing (bathrooms are indoors), but if your remodel includes relocating an exterior wall or adding a door, any new foundation or footer must respect that depth. Second, Hays sits on loess and expansive clay in the east side—settlement can cause cracks in tile or grout after a remodel if the foundation is unstable; inspectors do not approve remodels in homes with visible structural settling without a structural engineer's sign-off. Third, if your vent duct runs through an unconditioned attic in Hays (Zone 5A), it must be insulated to R-8 minimum to prevent condensation during winter; this is a code detail often overlooked in DIY plans but caught in review.

The typical cost for a Hays bathroom remodel permit is $300–$600, calculated as a percentage of the project valuation (1.5–2%). A $25,000 bathroom remodel might carry a $350–$400 permit fee plus $150–$250 inspection surcharges if rough-in re-inspections are needed. Timeline: plan submission to approval is 2–5 weeks, then construction (2–6 weeks depending on complexity), then inspections (1–2 weeks to schedule and complete). Total calendar time from permit pull to certificate of occupancy is typically 6–10 weeks. If the project is straightforward (no structural changes, simple fixture relocation, standard exhaust fan), inspections pass on first attempt, and no lead-safe work is required, you might finish in 5–6 weeks. Complications (rejected plans, lead clearance, foundation issues, three-piece toilet flange, etc.) can push 10–14 weeks. The City of Hays Building Department accepts permit applications in person at City Hall (620 E 10th St, Hays, KS 67601) or may offer online submission via their permit portal; confirm current submission method and inspector contact by calling 785-628-7377 (verify locally, as phone numbers change).

Three Hays bathroom remodel (full) scenarios

Trap-arm length and vent-stack proximity in Hays bathroom remodels

IRC P2706 limits trap-arm length to 6 feet from the vent stack—this is the horizontal distance from the outlet of the trap to the nearest vent. In Hays, the Building Department enforces this strictly because plumbers often underestimate the distance and create undersized vents, leading to slow drains and backups. When you relocate a toilet or vanity, the rough plumbing inspector will measure the trap-arm run and verify it's within code. If your new toilet is 8 feet from the vent stack, you have two options: (1) shorten the run by repositioning the toilet closer to the stack, or (2) install a vent-relief line (a secondary vent that re-vents the trap arm midway). Option 2 adds complexity and cost but allows you to keep the layout you want. Most rejected Hays plans involve a trap-arm that exceeds 6 feet; anticipate this in your plan submission and mark the measurement clearly.

Hays inspectors also verify that vent stacks are sized correctly for the number of fixtures served. A single 2-inch vent can serve one toilet and one lavatory; if you add a shower, you may need a larger vent (3 inches) or a second vent line. This is determined by fixture-unit loading tables in the IRC, but the Building Department will calculate it during plan review. If your plan shows a trap-arm distance that looks borderline, preemptively include a note: 'Trap arm 6 feet from stack per IRC P2706' or 'Secondary vent-relief line installed to accommodate 8-foot run.' Clarity prevents rejections and re-submittals.

Shower waterproofing systems and the Hays inspector's checklist

IRC R702.4.2 requires a certified waterproofing system for any new shower enclosure. Hays inspectors do not accept 'tar paper' or 'standard drywall with caulk'—you must use an engineered system such as Schluter-Kerdi (uncoupling membrane), Wedi (foam board with membrane), a traditional PVC pan liner, or equivalent. The most common choice in Hays is cement board (1/2 inch) + waterproofing membrane (Schluter-Kerdi, Red Guard, etc.) + tile. Your plan must specify the exact product or equivalent code-approved alternative. During rough waterproofing inspection (after drywall is closed but before tile and grout), the inspector checks that (1) cement board is fastened securely with corrosion-resistant fasteners every 8 inches, (2) membrane is applied per the manufacturer's spec (overlaps, sealing at penetrations, etc.), (3) drain is connected with proper slope (1/4 inch per foot) to the P-trap, and (4) under-pan (6-mil poly or shower-pan liner) is in place beneath the floor area to catch any leakage. A frequent issue in Hays remodels is homeowners or contractors using standard drywall (green board) instead of cement board—this fails inspection. Another issue: the membrane is not sealed around the drain fitting, allowing water to bypass it. Hays inspectors will ask you to demonstrate the product's UL or ICC listing before approving the final.

If your shower enclosure is a prefabricated acrylic or fiberglass surround (not tiled), the waterproofing is built into the unit and no separate membrane is required—but the seal between the surround and the wall framing must be caulked with 100% silicone (not paintable caulk), and the plan should note this. Hays's 36-inch frost depth and dry climate mean condensation in showers is less of a winter concern than in northern climates, but exhaust-fan sizing remains critical: a 10x12 bathroom with a shower requires at least 80 CFM of exhaust fan capacity, and the duct must terminate to the exterior (not soffit, not roof, not attic). If the duct is not insulated and runs through an unheated space (rare in a bathroom, but possible if ducting to a soffit), it must be R-8 minimum to prevent condensation and duct breakdown.

Common questions