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

Addison bathroom remodel permits — the key details

The Illinois Building Code (based on 2021 IBC/IRC) requires a permit for any bathroom remodel that involves fixture relocation, new electrical circuits, wall changes, or plumbing modifications. The most common trigger is moving a toilet, sink, or shower to a new location — even 18 inches away — because IRC P2706 limits how far a toilet's trap arm can extend from the main drain stack (typically 6 feet maximum), and inspectors will verify this during rough plumbing inspection. A full tub-to-shower conversion is also a permit trigger under IRC R702.4.2, which mandates a specific waterproofing assembly (cement board + liquid membrane, or a pre-fabricated pan with sealed seams); inspectors treat this as a change to the building envelope and require detailed shop drawings. Adding a new exhaust fan or replacing an existing one with a duct termination change requires a permit under IRC M1505, which specifies that the duct must terminate to the exterior (not the attic) and cannot exceed 8 feet in length without a booster fan. If you're adding a new bathroom circuit or upgrading the electrical panel, NEC 210.12 mandates AFCI protection on all 15- and 20-amp circuits in the bathroom area; Addison inspectors are strict on this and will reject rough-electrical if the AFCI devices aren't correctly labeled on the plan.

Addison's Building Department does not allow permits to be pulled online; you must submit plans in person at City Hall (120 S. Addison Road, Addison, IL 60101) or by mail with a completed application form. This is a significant difference from nearby Elmhurst or Naperville, which offer e-permit portals that speed up initial review. When you file, you'll need two sets of floor plans showing fixture locations (with dimensions), a plumbing schematic showing drain-line routes and trap-arm slopes, and an electrical one-line diagram if circuits are being added. For a tub-to-shower conversion, you must include a waterproofing specification sheet (e.g., Schluter Systems, Wedi, or equivalent cement-board-and-membrane system) or a product data sheet for a pre-fab shower pan. Addison's plan-review team typically takes 3–5 weeks because they coordinate with the DuPage County Health Department if the bathroom is near a septic system (though most Addison homes are on municipal sewer). Once approved, you'll receive a permit card good for 180 days; any work beyond that timeline requires a renewal ($50–$100).

Inspections for a full bathroom remodel in Addison follow a standard sequence: rough plumbing (after drain lines are in but before walls are closed), rough electrical (after all wiring is run but before drywall), drywall (optional if no framing changes), and final. Each inspection costs $150–$200 and must be scheduled 24 hours in advance by calling the Building Department. Inspectors will verify that toilet trap arms don't exceed 6 feet horizontally, that shower/tub waterproofing is installed per specification, that exhaust ducts terminate to the exterior with a damper, and that all GFCI/AFCI outlets are correctly installed and labeled. If your home was built before 1978, the rough-plumbing inspection will also check for lead in copper solder or brass fittings; lead-free solder (SAC alloy) is required by state law. Common rejection points include: (1) missing waterproofing detail for a new shower (Addison inspectors require a one-page shop drawing even for standard cement-board systems); (2) bathroom circuits that aren't AFCI-protected on the electrical plan; (3) exhaust duct routed through the attic instead of terminating outside; and (4) drain-line slope that's less than 1/4 inch per foot or greater than 3 inches per foot (IRC P3005.1). Plan for 2–3 site visits; each rejection adds 1–2 weeks to your timeline.

If you're in Addison's designated floodplain (check the DuPage County GIS map for your address), bathroom fixtures must be elevated to at least 1 foot above the 100-year flood elevation. This doesn't kill the project but requires a Floodplain Development Permit (issued by the DuPage County Stormwater Management Department) in addition to your building permit — allow an extra 2–3 weeks and $100–$250 in county fees. Addison also enforces Illinois's Lead Disclosure Law; if your home was built pre-1978, you must provide a lead-hazard disclosure form before any work begins. This isn't a permit prerequisite — you'll get your permit regardless — but if you're selling the home within a year, the buyer will ask questions, and failure to disclose can result in fines up to $16,000 under state law. For electrical work, Addison requires that any new subpanel or circuits be designed by a licensed electrician and signed by a Professional Engineer (PE) if the load exceeds 20% of the existing panel capacity. This is more strict than some neighboring municipalities and can add $300–$500 to your electrical engineering costs.

Timeline and next steps: File your permit application at Addison City Hall (120 S. Addison Road) during business hours (Mon–Fri, 8 AM–5 PM, phone 630-629-2313 to confirm current hours). Bring two sets of floor plans, a plumbing schematic, and an electrical plan (if circuits are new). Expect plan review to take 3–5 weeks; you'll be notified of approval or rejections by mail or email. Once approved, you have 180 days to start work; request the first inspection (rough plumbing) at least 24 hours before it's needed. The total permit cost (application + inspections) typically runs $400–$800 depending on project scope. If you're doing the work yourself, you can pull the permit as an owner-builder, but Addison requires that you sign an affidavit stating you occupy the home; if a licensed contractor is doing the work, they'll often pull the permit and include the fee in their bid. Keep the permit card on site at all times; inspectors will ask to see it before proceeding.

Three Addison bathroom remodel (full) scenarios

Addison's in-person permit filing process: what to expect and how to speed it up

Unlike Elmhurst or Carol Stream, Addison does not offer an online e-permit portal; all bathroom permits must be filed in person or by mail at the Building Department (120 S. Addison Road, Addison, IL 60101). This means no self-service document upload, no same-day status checks, and no email-based plan reviews — you'll receive communications by mail or phone. Call ahead (630-629-2313) to confirm office hours before visiting; the typical window is Mon–Fri 8 AM–5 PM, but it's worth verifying because staffing can affect availability. When you arrive, bring two complete sets of plans (one stays with the department, one is marked and returned), your completed application form (available at City Hall or online), a check or card for the permit fee (calculated by the counter staff based on estimated project valuation), and your homeowner ID if you're pulling an owner-builder permit.

Plan-review timelines in Addison run 3–5 weeks for a typical bathroom remodel, slower than nearby municipalities with e-permit systems (Naperville, Downers Grove average 1–2 weeks). The delay stems from two factors: the Building Department coordinates with the DuPage County Health Department if your property is within 300 feet of a septic system (rare in Addison, which is almost entirely municipal sewer, but the review happens anyway), and inspectors manually mark up plans by hand rather than using a digital markup tool. To speed things up, submit your plans complete and clear: use a 1/4-inch scale, label all dimensions in feet and inches (not decimals), show fixture locations with a clear floor plan, include a plumbing schematic with slopes and trap-arm lengths, and provide a one-page product data sheet for any new fixtures (fan, valve, waterproofing system). Missing details will trigger a rejection and a re-submission cycle, adding 1–2 weeks.

Once your permit is approved, you have 180 days to begin work; if you exceed this timeline, you'll need to renew the permit ($50–$100). The permit card must be kept on site and shown to inspectors at each visit. To request an inspection, call the Building Department at least 24 hours in advance; inspectors are typically available Mon–Fri 8 AM–4 PM. If you miss a scheduled inspection or the work is not ready, you'll pay a no-show fee ($50–$75) and must reschedule. Addison Building Department does not offer weekend or evening inspections, which can be a constraint if you're coordinating with a contractor's schedule.

Waterproofing, GFCI, and common Addison inspection rejections

Addison inspectors are particularly strict on bathroom waterproofing specifications because Illinois's high water table and glacial-till soils (common in DuPage County) create moisture intrusion risks. If you're converting a tub to a shower or installing a new shower, IRC R702.4.2 mandates a waterproofing assembly consisting of a substrate (typically cement board rated ASTM C1288), a liquid or sheet-membrane barrier (Schluter Kerdi, Wedi, or equivalent), and sealed seams. Inspectors will request a one-page installation detail showing how the membrane is applied to the subfloor, curb, and walls; a product data sheet alone is not sufficient. Common rejection: submitting a generic Schluter brochure instead of a site-specific detail sketch showing seam locations and overlap. To avoid this, create a simple hand-drawn or digital sketch labeled with the membrane type, seam locations, and overlap width (typically 2–3 inches per product). Pre-fabricated shower pans (one-piece fiberglass or acrylic) skip this requirement if they're sealed per manufacturer specs, but Addison rarely accepts them for full custom remodels.

GFCI and AFCI protection are another common rejection point in Addison. NEC 210.12 requires all 15- and 20-amp circuits in the bathroom to be AFCI-protected (either via a breaker or a combination GFCI/AFCI outlet). Inspectors will review your electrical plan and verify that you've specified AFCI protection; if the plan shows a standard outlet or a GFCI-only outlet (GFCI provides shock protection but not arc-fault protection), the rough-electrical inspection will be rejected. To avoid this, coordinate with your electrician to confirm whether the bathroom circuit will use an AFCI breaker in the panel or a combination GFCI/AFCI outlet; label this clearly on the electrical plan. A second common miss: failing to upgrade bathroom outlets to GFCI if they already exist. If your bathroom has a 20-year-old 15-amp circuit with two standard outlets, Addison code requires that you either install GFCI outlets or upgrade to an AFCI breaker; a simple 'we're just adding one fixture' argument won't fly.

Trap-arm length and slope are a third rejection category, especially for toilet relocations. IRC P2706 and P3005.1 limit the horizontal distance from a toilet trap to the main stack to 6 feet; if your plumbing schematic shows 7 feet, inspectors will reject it and require rerouting or a pump-assisted drain. Slope must also fall between 1/4 and 3 inches per foot; anything outside this range is a rejection. To avoid problems, have your plumber measure the actual drain route on site and provide a dimensioned schematic before submitting; this costs $100–$200 but prevents a costly rejection and re-design. Finally, exhaust-fan duct termination is frequently overlooked: the duct must terminate to the exterior (not the attic), with a roof-mounted damper, and the total duct length (including elbows) cannot exceed 8 feet without a booster fan. Inspectors will check this during both rough-electrical and final inspections; a photo of the roof-termination point is often requested as part of final sign-off.

Common questions