Do I need a permit for a full bathroom remodel in
Streamwood, IL?

Streamwood full bathroom remodel permits—the key details

Streamwood's Building Department administers permits under the current Illinois Building Code (IBC 2021 edition as of 2024, though this does shift periodically). The critical dividing line is whether any plumbing fixture location changes, any new electrical circuits are added, or the exhaust fan is replaced with a new duct run. Per IRC P2706 (adopted into IBC), any drain line relocation must maintain a trap-to-vent distance of no more than 3 feet 6 inches measured horizontally along the center line of the pipe—a common rejection point because homeowners underestimate the real estate needed for new drain routing. If you're moving a toilet, sink, or tub, the drain line almost always requires rework, and Streamwood's permit reviewers will demand that your plumber submit a site plan showing the trap arm length and vent location. The permit also triggers a rough-plumbing inspection before any drywall or tile goes up, so you cannot close walls until the inspector signs off. This is not negotiable, and it's where many DIY bathroom projects stall because they've already installed drywall over the plumbing rough-in.

Electrical work in a bathroom is heavily regulated. Per IRC E3902 (and reinforced in Streamwood's adoption of IBC), every outlet and light fixture within 6 feet of a sink, toilet, or tub must be GFCI-protected (ground-fault circuit interrupter). If you add a new circuit (say, a dedicated 20-amp line for a heated mirror or ventilation fan), you must show the GFCI protection on the electrical plan, and the city will inspect it. Many permit rejections occur because applicants submit electrical plans that don't clearly label GFCI devices or show the circuit configuration. Streamwood also enforces the national code rule that bathroom circuits cannot serve any other room—a bathroom circuit must be isolated. If your existing bathroom shares a circuit with a hallway or bedroom outlet, the permit application will flag this as non-compliant, and you'll be required to add a new isolated circuit. This cost varies (typically $400–$800 to run a new circuit from the panel), but it's unavoidable if you want the permit to pass. AFCI (arc-fault circuit interrupter) protection is also required for all 15-amp and 20-amp circuits in bathrooms per NEC 210.12, so your electrician needs to install an AFCI breaker or combination AFCI/GFCI device.

Exhaust ventilation is a common trigger for permits and a common source of confusion. Per IRC M1505, a bathroom exhaust fan must duct to the outside (not into the attic, and not into a soffit if the soffit is less than 10 feet from the roof peak). The duct must be smooth-wall (no flex duct downstream of the damper, per many jurisdictions' interpretations), and termination must be via a wall cap or roof jack with a back-draft damper. Streamwood's plan-review process includes a check of the exhaust duct routing, and the rough-in inspection includes verification that the damper opens freely and the duct does not have excessive elbows (more than two 90-degree bends is a red flag). If you're replacing an old bath fan with a modern one (especially a humidity-sensor model), the permit covers the ductwork change-out. Many homeowners assume a like-for-like fan swap is exempt, but if the duct path or termination changes, it's permit-required. The city's Building Department will also note ventilation-system CFM (cubic feet per minute) requirements: a powder room needs 20 CFM, a full bath needs 50 CFM, and a master bath can require 75+ CFM depending on square footage and whether there's a tub. Your permit application must specify the fan's rated CFM.

Waterproofing and shower/tub assembly changes are core to a full bathroom remodel and trigger code compliance checks. Per IRC R702.4.2, any new shower or tub enclosure must have an approved waterproofing membrane (cement board + liquid membrane, or a pre-fabricated waterproofing pan system). Streamwood requires that your permit application specify the waterproofing method—'cement board' is not specific enough. You need to state whether you're using Schluter, Kerdi, or a brushed liquid membrane system, and the product data sheet must be submitted with the permit. If you're converting a tub to a shower (or vice versa), the waterproofing assembly change is considered a material alteration, and the rough-in inspection will verify that the membrane is properly installed before tile is set. A very common rejection is a shower pan that was tiled over without an approved waterproofing layer, and Streamwood's inspectors will call this out every time. The city also requires a 3-inch dam at the threshold if you're creating a wet room or a threshold-less shower, and the slope of the pan must be verified during the framing or drywall inspection.

Timeline and cost expectations: Streamwood's Building Department typically processes a full bathroom-remodel permit application in 1–2 weeks if the plans are complete and compliant. Plan review takes another 2–3 weeks on average (or longer if the city requests revisions). Once the permit is issued, you have 180 days to begin work, and the permit is valid for 12 months from issuance. Permit fees are based on valuation: a $15,000 bathroom remodel falls into a $200–$400 permit-fee range (roughly 1.5–2% of the estimated valuation, though Streamwood's formula can vary). Inspections are typically four-part: rough plumbing, rough electrical, framing/drywall (sometimes combined with mechanical), and final. Each inspection must be scheduled 24 hours in advance (some municipalities allow online scheduling; verify with Streamwood's portal). If the inspector finds non-compliance, you'll need to correct the issue and reschedule, which can add 1–2 weeks to the timeline. Budget-conscious homeowners should front-load the permit work—get the plans right the first time, and avoid re-submittals.

Three Streamwood bathroom remodel (full) scenarios

Waterproofing and the most common permit rejection

The single most common reason Streamwood Building Department rejects a bathroom-remodel permit application is inadequate or unspecified waterproofing in a shower enclosure. IRC R702.4.2 requires a continuous, approved waterproofing membrane behind all wall surfaces that will be in contact with water in a shower or tub enclosure. The code allows several approved methods: cement board (at least 1/2 inch thick) with a liquid-applied membrane, pre-fabricated waterproofing systems like Schluter Kerdi or Wedi, or traditional tar paper and mortar, but only if the mortar is at least 1 1/4 inches thick. Streamwood's inspectors will call out a shower rough-in if they see only drywall or thin cement board without a membrane, and they will red-tag the permit until the waterproofing is corrected.

Many homeowners and even some contractors assume 'cement board is waterproofing,' but it is not. Cement board is moisture-resistant but not waterproof; it must be paired with a liquid or sheet membrane. When you file your permit, the application must specify the exact waterproofing product or system—'cement board plus Redgard liquid membrane' or 'Schluter Kerdi board,' not just 'waterproofing TBD.' If the specification is vague, Streamwood will request a revision before issuing the permit. Product data sheets are strongly recommended as part of your permit package. This front-loading saves 2–3 weeks of plan-review back-and-forth.

During the rough-in inspection, the inspector will verify that the membrane (whether liquid-applied or sheet) is installed in full contact with the substrate, that seams are sealed per the manufacturer's specs, and that the membrane extends at least 6 inches above the highest water-spray zone. For a shower enclosure without a threshold (a walk-in shower), the membrane must extend to the finished floor and slope toward the drain at a minimum 1/4 inch per foot gradient. If the slope is insufficient or the membrane has gaps, the inspector will fail the rough-in, and the contractor will need to tear out the partially-installed tile and fix the waterproofing—a costly rework. Specifying the system upfront, submitting the manufacturer's installation guide with your permit, and using a contractor experienced with that specific system prevents this.

Electrical GFCI and AFCI requirements in Streamwood bathrooms

Bathrooms are among the highest-risk zones for electrical shock and arc-faults, and Streamwood enforces both GFCI and AFCI protection per the National Electrical Code (NEC) as adopted in Illinois. Per NEC 210.8(A)(1), all 15-amp and 20-amp outlets within 6 feet of a sink must be GFCI-protected. In a typical bathroom, this includes the vanity outlet, any wall outlets near the tub or shower, and often an outlet or two near the toilet (within the 6-foot zone). GFCI protection can be provided either by a GFCI outlet (which has 'TEST' and 'RESET' buttons) or by a GFCI breaker in the electrical panel. A single GFCI outlet can protect downstream outlets on the same circuit, but Streamwood's inspectors prefer to see GFCI outlets at the point of use (the vanity outlet) rather than relying on a GFCI breaker to protect the entire bathroom circuit, because the visual indicator is clearer and the reset is accessible.

AFCI (arc-fault circuit interrupter) protection is required per NEC 210.12(B) for all 15-amp and 20-amp circuits serving bathrooms. This is a separate protection from GFCI and detects dangerous arcing (like a loose wire or damaged insulation that could spark a fire). An AFCI breaker in the panel, or a combination AFCI/GFCI device, satisfies this requirement. Many older Streamwood homes have only simple breakers, so adding an AFCI breaker is often part of the electrical upgrade for a bathroom remodel. During plan review, the city will verify that the electrical diagram clearly shows GFCI and AFCI protection and that the circuits are isolated for bathroom use (not shared with other rooms). If the plan does not label these protection types, Streamwood will request a revision. During the rough electrical inspection, the inspector will verify that GFCI outlets respond correctly to the test button, that AFCI breakers are present and functioning, and that no outlets are missing GFCI protection. This inspection is non-negotiable and will delay the project if protection devices are not in place.

A common mistake is assuming that a bathroom vanity outlet can share a circuit with a hallway or bedroom outlet. It cannot. Per NEC 210.11(C)(2), bathroom circuits must be individual circuits—meaning they serve only the bathroom. This is a 'dedicated circuit' rule. If you have an existing bathroom outlet on a shared circuit, you cannot simply add GFCI protection and consider the work complete. Streamwood's permit review will identify this non-compliance, and you will be required to either (a) add a new isolated bathroom circuit from the panel, or (b) physically disconnect the non-bathroom outlets from the bathroom circuit and reconfigure the wiring. Either approach adds cost and complexity. Budget roughly $400–$800 to add a new dedicated bathroom circuit if one does not exist, and include this cost estimate in your upfront permit planning.

Common questions