Do I need a permit for a full bathroom remodel in
Rock Island, Illinois?

Rock Island full bathroom remodels — the key details

The foundational rule for Rock Island is this: if you move a toilet, sink, or tub — or if you add any electrical circuit (including new GFCI outlets) — you must pull a permit and pass inspections under the 2021 IRC, Section P2706 (drainage and vent sizing) and E3902 (ground-fault circuit protection for bathrooms). The Rock Island Building Department does not have a 'minor alteration' carve-out for plumbing relocation; even a toilet moved 2 feet triggers the requirement. This is different from, say, the Village of East Moline just across the river, which allows some fixture swaps within the same wall cavity without review. Electrically, any new circuit — whether it's a dedicated 20-amp for a heated towel rack or a relocated outlet — must be shown on a signed electrical plan and inspected before drywall closes. The bathroom must have GFCI protection on all outlets within 6 feet of a sink, tub, or shower (NEC 210.52(D)); a missed GFCI requirement is one of the top reasons Rock Island inspectors return plans for revision. Lead paint rules (40 CFR 745) also apply to any pre-1978 homes; if you're disturbing painted surfaces during demolition or reframing, you must use lead-safe work practices or hire a certified contractor, or the permit can be flagged.

Waterproofing and shower/tub conversions are where Rock Island inspectors focus most carefully. If you're converting a tub to a walk-in shower (or vice versa), IRC R702.4.2 requires a sealed assembly: typically cement board (not drywall) plus a membrane (redguard, Schluter, or equivalent) behind all tile. Your permit application must specify the waterproofing system — vague language like 'standard shower surround' will trigger a plan-review rejection. Rock Island's Building Department requires you to name the product and cite the manufacturer's installation manual, ideally with a labeled section drawing. This is not optional. Similarly, if you're adding an exhaust fan duct, IRC M1505 requires 4-inch minimum diameter ducts (rigid or semi-rigid, not flexible), a damper at termination, and a termination point outside the home (not into the attic, crawl space, or soffit return — a common violation). Many Rock Island homeowners assume they can vent into the attic; inspectors will catch it and require rework. The duct route must be labeled on your framing plan, and the CFM rating of the fan must match the bathroom square footage (typically 50 CFM for rooms under 50 sq ft, 1 CFM per sq ft for rooms over 50 sq ft, or higher if you have a tub and shower combo).

Plumbing trap arms and drain sizing are the third major review point. If you're relocating a toilet or sink, the new drain line must comply with trap-arm length limits: IRC P3005.1 limits trap arm horizontal runs to 24 inches for a toilet and 24 inches for a lavatory, before the arm drops to the vent (vent sizing per P3114). Oversized or undersized vent lines are common rejections. Rock Island's inspectors will also verify that any new drain lines slope at 1/4 inch per foot (IRC P3105.1) and that cleanout locations are accessible. If you're tying into an existing main stack, the inspector will verify the existing stack size is adequate to handle the added load (too many drains on an undersized 2-inch vent can cause slow drains and trap seal loss). The frost depth in Rock Island is 36–42 inches depending on location; this matters if any new drain or vent penetrates the foundation or exterior wall below grade — those penetrations must be sealed and sloped to prevent ice damming or water intrusion. Most bathroom remodels don't involve foundation work, but if you're relocating a floor drain or adding a new one (e.g., for a steam shower), you need to plan for below-grade sealing.

Electrical and GFCI specifics are non-negotiable in Rock Island. NEC 210.52(D) requires GFCI on all receptacles within 6 feet of sinks, tubs, and showers; this includes the outlet behind the vanity. Many contractors assume a single GFCI outlet at the vanity covers all the nearby outlets — incorrect. Rock Island inspectors want to see every outlet labeled on the electrical plan as either 'GFCI-protected' (either by a GFCI outlet or by a GFCI breaker upstream) or 'not within 6 feet of water source.' If you're adding radiant floor heating, new lighting circuits, or ventilation fans, those also need to be shown and approved. Bathrooms also require AFCI protection (Arc-Fault Circuit Interrupter) on all 120-volt, single-phase circuits per NEC 210.12(B), which means AFCI breakers or outlets in the panel or in the circuit. Your electrician must specify this on the plan. Failure to show GFCI/AFCI details is the #1 reason for electrical-plan rejections in Rock Island — the inspector will not approve the rough-in inspection until the plan is corrected and resubmitted.

Timeline and inspection sequence: Rock Island's typical bathroom remodel permit takes 3–4 weeks for plan review (submitted digitally through the city portal). Once approved, you'll schedule a rough-in inspection (plumbing rough-in, electrical rough-in, and framing/wall changes if applicable) before you can drywall or tile. If you're moving walls, you may also need a framing inspection and, if structural, a structural engineer stamp (unlikely for bathroom walls, but possible). After rough inspections pass, you can close walls, install tile/fixtures, and schedule a final inspection. Total timeline from permit issuance to final is typically 4–8 weeks depending on contractor pacing and re-inspection needs. Rock Island does not offer expedited review; standard review is standard. If the inspector finds violations (missed GFCI, incorrect vent routing, waterproofing detail missing), you'll need to correct and re-inspect, adding 1–2 weeks. Permit fees are $300–$700 depending on the valuation: Rock Island typically charges 0.5–1.5% of the estimated project cost, so a $25,000 remodel pays roughly $375–$375 in permit and plan-review fees. Owner-builder work is allowed for owner-occupied single-family homes, but electrical work must still be inspected and signed by a licensed electrician in Illinois.

Three Rock Island bathroom remodel (full) scenarios

Waterproofing and shower conversions in Rock Island's climate

Rock Island is in a humid continental climate (Köppen Dfb on the northern edge, transitioning to Dfa southward), which means cold winters (average low 10°F in January, frost depth 36–42 inches) and humid summers (dew point regularly 60°F+). A poorly waterproofed shower in this climate leads to condensation inside walls, mold, and structural rot within 2–3 years — which is why IRC R702.4.2 waterproofing is not a gray area. If you're converting a tub to a shower, you must use a sealed assembly: cement board (not drywall or foam-core) as the substrate, plus a liquid or sheet membrane (Redguard, Hydro Ban, Schluter KERDI, etc.). The membrane must extend 6 inches up the walls from the shower pan lip and fully envelope the pan threshold. Many Rock Island homeowners think painting drywall with waterproof paint is sufficient — it is not, and inspectors will reject it.

The waterproofing detail must be shown on your permit plans. Vague language ('standard tile surround') will cause plan rejection and require resubmission. Instead, specify: 'Cement board substrate, all seams taped and sealed with mesh. Liquid-applied waterproofing membrane (Redguard Fast Track, 1/32 inch thick, coverage per manufacturer) applied to all surfaces within shower zone. Pan drain weir and threshold sealed per manufacturer detail.' Include a cross-section drawing showing the membrane layer location. This detail, when submitted, typically takes 1 extra week in plan review because the inspector must verify it meets IRC standards. Once approved, the inspector will want to see the actual waterproofing work during rough inspection before tile is installed — inspect the membrane, verify seams are sealed, check pan drain is operable. Many contractors install tile first and tell the inspector the membrane is 'under the tile' — this will fail inspection and require tile removal and remedial waterproofing, a costly setback.

Condensation control is also important in Rock Island's humid climate. Your exhaust fan must be sized correctly (IRC M1505: minimum 50 CFM for bathrooms up to 50 sq ft, 1 CFM per sq ft for larger) and ducted continuously to the exterior, not into an attic, crawl space, or soffit return. The ductwork should be insulated (R-4 or higher) to prevent condensation within the duct itself, which can drip back into the bathroom or create ice damming in winter. If the duct runs through an unconditioned attic, insulation is critical; many Rock Island contractors skip insulation and cause 'ghosting' (dark streaks) or water damage around duct penetrations. Your permit plan should specify duct insulation; the inspector will likely verify this during rough-in. A properly installed exhaust system in Rock Island's climate will dramatically reduce mold risk and extend shower-tile life.

GFCI, AFCI, and electrical plan requirements in Rock Island

Rock Island's adoption of the 2021 NEC (via the Illinois Building Code) mandates GFCI protection for all 120-volt receptacles within 6 feet of a sink, tub, or shower — and AFCI (Arc-Fault Circuit Interrupter) protection on all 120-volt, single-phase circuits in the bathroom, including lighting and ventilation circuits. This dual requirement is commonly missed by DIYers and even some contractors, causing plan rejections and failed inspections. GFCI protection can be achieved two ways: (1) a GFCI outlet (costs ~$15, protects downstream outlets on the same circuit) or (2) a GFCI breaker in the main panel (costs ~$50–$75, protects the entire circuit). AFCI protection must be a dedicated AFCI breaker in the panel (or AFCI outlets, but breaker is simpler). Many Rock Island homeowners assume one GFCI outlet near the vanity covers everything — incorrect. If you have outlets on both sides of the vanity, behind the toilet, or near a tub, each must be labeled on the electrical plan as either GFCI-protected or outside the 6-foot protection zone.

Your electrical plan for Rock Island Building Department must show a floor plan with all outlet locations, a panel schedule listing breaker sizes and types (AFCI yes/no, GFCI yes/no), and circuit paths. This level of detail is required before plan review is complete; partial or vague electrical plans will be rejected. If you're adding a new 20-amp circuit for heated towel racks, radiant floor heating, or a new exhaust fan, show the breaker type (AFCI), wire size (12-gauge for 20-amp), and circuit path from the panel to the fixtures. If you're relocating outlets (not in original locations), show both old and new locations on the plan. Rock Island does not allow owner-builders to do electrical work; a licensed electrician must sign the electrical plan, pull the permit (or co-permit with the homeowner), and pass the inspection. This is a state-level Illinois requirement, not unique to Rock Island, but it's worth emphasizing because many homeowners attempt DIY electrical work thinking they can get away with it — they cannot, and unpermitted electrical work is a top lender and insurer red flag.

Common electrical rejections in Rock Island: (1) GFCI/AFCI not shown on the plan (most common), (2) vent-fan circuit not labeled AFCI, (3) Outdated two-prong outlets near sinks (must be three-prong GFCI, per NEC 406.4), (4) Light switches too close to tub edge (NEC 210.21 requires minimum 60-inch horizontal distance in some cases; check with inspector), (5) Receptacles within 12 inches of sink edge must be GFCI-protected (IRC E3902.2). When you submit your electrical plan, double-check against these rules. If in doubt, ask the Rock Island Building Department directly during pre-permit consultation (many departments offer free 15-minute office consultations) — a quick call can save weeks of plan rejections.

Common questions