Does Naperville require whole-house fixture upgrades like California?

No. Illinois has not adopted California's §1101.4. A Naperville bathroom permit requires only the permitted work to comply with current code — no obligation to upgrade fixtures in other bathrooms or throughout the house.

Who provides electricity in Naperville?

Naperville operates its own municipal electric utility (Department of Public Utilities — Electric), not ComEd. Contact Naperville Electric Operations at (630) 420-6181 for service-related coordination. Nicor Gas provides natural gas.

Do I Need a Permit for a Bathroom Remodel in Naperville, IL?

Q: What is the Naperville Electrical Contractor registration?

Naperville requires electricians to register as Electrical Contractors with the City's Community Services Department — separate from state licensing. Verify registration before hiring any electrician for Naperville bathroom work. Call (630) 420-6100 to verify contractor status.

Q: How long does a Naperville bathroom remodel permit take?

Trade permits (plumbing, electrical): typically a few business days. Building permits with structural scope: 1–2 weeks. File all permits concurrently at project start. Call (630) 420-6100 for inspection scheduling.

Naperville bathroom permits follow the standard Midwest IRC pattern: tile, paint, and fixture swaps at existing locations are permit-free; the moment you move a drain, add a circuit, or open a wall, the applicable trade permit is required. Unlike California, no whole-house fixture upgrade mandate is triggered. Unlike Springfield MA, homeowners can pull their own permits for owner-performed work.

Research by DoINeedAPermit.org Updated April 2026 Sources: Naperville Building Permits, Naperville Civic Access portal, 2024 ICC (effective April 1, 2026)

It Depends on Scope

Cosmetic updates (tile, paint, fixture swaps at same locations) need no permit. Plumbing relocation, new circuits, and structural changes each require their respective permits through the Civic Access portal.

In Naperville: replacing tile, painting, swapping vanity or toilet at the same rough-in location, or updating light fixtures on existing wiring requires no permit. Moving a drain, adding circuits, installing an exhaust fan requiring new exterior penetration, or removing a wall requires the applicable permit (building, plumbing, or electrical) through the Civic Access portal or with Naperville's online permit types. Permits: (630) 420-6100 or buildingpermits@naperville.il.us. TED Business Group, 400 S. Eagle St., Mon–Fri 9 a.m. No California §1101.4 whole-house fixture upgrade mandate. Electrical permits require a contractor registered as an Electrical Contractor with Naperville. 2024 ICC codes apply to permits submitted April 1, 2026 and later.

Every project and property is different — check yours:

Naperville IL bathroom remodel permit rules — the basics

Naperville's building permit process is administered through the TED Business Group, and bathroom remodel permits are applied for through the Civic Access portal online. The portal allows homeowners and contractors to apply for building, plumbing, and electrical permits. A comprehensive bathroom remodel with plumbing relocation, new circuits, and structural wall removal would require three separate permit applications — building, plumbing, and electrical — all filed concurrently through the same portal account. The Civic Access portal allows payment by credit card or eCheck.

One distinctive Naperville requirement that differs from most other Illinois municipalities: electrical contractors performing electrical work within Naperville must be registered as an Electrical Contractor with the City through the Community Services Department. This is a separate Naperville registration requirement in addition to any state licensing. Verify that any electrical contractor you hire for bathroom remodel work holds current Naperville Electrical Contractor registration before signing any contract. The Civic Access portal handles electrical permit applications through the city's online system.

Naperville is served by its own municipal electric utility — the Department of Public Utilities — Electric — rather than Commonwealth Edison (ComEd) as in most of the surrounding DuPage County area. This means for any bathroom remodel work that requires service coordination with the electric utility (service upgrades related to panel work, for example), you contact Naperville Electric at (630) 420-6181 rather than ComEd. For most standard bathroom electrical permit work — new circuits, outlet additions — no utility coordination is needed, and the permit process is the same as in any other city. Natural gas in Naperville is provided by Nicor Gas.

Illinois has not adopted California's Civil Code §1101.4 whole-house plumbing fixture upgrade mandate. A bathroom remodel permit in Naperville requires only that the permitted work itself comply with the Illinois Plumbing Code and the 2024 IRC (for permits submitted April 1, 2026 and later, or 2018 IRC for earlier submissions). No obligation exists to upgrade fixtures in other bathrooms or throughout the house. This is a meaningful difference from California markets where a bathroom permit triggers a comprehensive house-wide fixture compliance audit.

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Three Naperville bathroom remodel scenarios

Scenario A

Full bathroom gut-and-replace: new tile, new vanity, new toilet (same locations), new shower valve — no plumbing relocation

A homeowner is completely renovating a 1980s hall bathroom — removing all tile, replacing the tub/shower surround, new vanity cabinet and sink at the existing vanity rough-in location, new toilet at the existing flange, and a new shower valve and trim. The shower valve replacement at the same shower connection location (same supply connections, no drain relocation) is cosmetic maintenance on the existing plumbing rough-in. No plumbing permit is required for this scope if the rough-in locations are unchanged. No electrical permit is required if existing lighting, outlets, and exhaust fan circuits are left as-is (just fixtures being swapped). No building permit is required since no walls are being altered structurally. The entire scope is permit-exempt cosmetic work under Naperville's code consistent with Illinois's adopted IRC. This is the most common bathroom remodel situation in Naperville's 1980s–1990s subdivision homes. Total project cost: $8,000–$22,000 for a quality gut-and-replace with no trade permit costs. Note: even without permits, work must comply with Illinois code if deficiencies are created — for example, a new shower waterproofing installation must use appropriate waterproofing systems even without a permit, because improper waterproofing will result in costly moisture damage.

No permit required (cosmetic work, no rough-in changes); same locations for all plumbing; no electrical changes; work must still meet code standards; project cost $8,000–$22,000

Scenario B

Converting a tub/shower to a walk-in shower with relocated drain and new heated floor circuit

A master bathroom renovation converts the existing tub/shower combination to a custom walk-in shower. The drain is relocated from the tub drain location to a new shower drain position approximately 3 feet away. A new exhaust fan is installed in a different ceiling location, requiring a new exterior penetration. A heated floor system is added, requiring a new 240V circuit. This scope requires: (1) a plumbing permit for the drain relocation — the existing PVC drain stub-out is relocated and a new shower floor drain rough-in installed; rough-in inspection required before shower pan and tile cover the drain; (2) an electrical permit for the new heated floor circuit and the new exhaust fan circuit — registered Naperville Electrical Contractor required; (3) a building permit may be required if the walk-in shower conversion involves any wall removal or significant structural modification; confirm with TED Business Group at (630) 420-6100. Total permit package for this scope: approximately $200–$500 in permit fees. The shower waterproofing inspection (before tile installation) is the most critical quality checkpoint for this scope — a walk-in shower without proper waterproofing membrane installation is the single most common source of bathroom-related moisture damage in DuPage County homes.

Plumbing permit (drain relocation) + electrical permit (heated floor + exhaust fan circuit); Naperville Electrical Contractor registration required; shower waterproofing inspection critical; permit fees $200–$500

Scenario C

Adding a new half-bath in unfinished basement space — all permits required

A homeowner wants to add a new half-bath (toilet and sink) in currently unfinished basement space. This scope requires all three trade permits: (1) building permit for the new bathroom walls, framing, and door; (2) plumbing permit for the new drain/waste/vent rough-in and supply lines — a critical consideration for basement bathrooms is whether the existing sewer line is below the floor level allowing gravity drain, or whether an ejector pump is needed; in Naperville's DuPage County location with glacially flat terrain, many basement slab elevations are close to or below the main sewer line elevation, making ejector pumps a common necessity; (3) electrical permit for bathroom lighting, GFCI outlet circuit, and exhaust fan circuit — registered Naperville Electrical Contractor required. The plumbing contractor must assess the basement slab-to-sewer line elevation relationship before designing the drain system. If an ejector pump is required, that adds $1,500–$3,000 to the project cost and additional permit scope. Total project cost for a basement half-bath addition in Naperville: $8,000–$20,000 depending on whether an ejector pump is needed and finish level. Building permit plan review includes confirming the new bathroom meets egress and ventilation requirements for habitable basement space under the 2024 ICC.

Building + plumbing + electrical permits all required; ejector pump assessment critical for Naperville basements (DuPage County terrain); Naperville Electrical Contractor registration required; project cost $8,000–$20,000

Bathroom work type	Permit required in Naperville, IL?
Tile, paint, fixture swaps at same locations	No permit. Cosmetic work with no plumbing relocation, electrical changes, or structural alterations. No California-style whole-house fixture upgrade triggered.
Moving a drain or supply line	Plumbing permit required. Rough-in inspection before shower pan and tile cover the drain work. Illinois-licensed plumber required for contracted work.
New circuits or exhaust fan	Electrical permit required. Registered Naperville Electrical Contractor required (separate from state license — Naperville requires city registration). GFCI on all bathroom outlets.
Wall removal or structural change	Building permit required. 2024 ICC applies to permits submitted April 1, 2026 and later. Framing rough-in inspection before drywall.
No whole-house fixture mandate	Illinois has not adopted California's §1101.4. Naperville bathroom permit requires only the permitted work to comply with current code — no obligation to upgrade other bathrooms or fixtures in the house.
Basement bathroom (ejector pump check)	Plumbing contractor must assess slab-to-sewer elevation before designing drain system. DuPage County's relatively flat terrain means many Naperville basements require ejector pumps for below-grade waste drainage.

Naperville electrical permits require city-registered Electrical Contractors — not just any licensed electrician.

Which permits your scope needs. Naperville Electrical Contractor registration verification. Civic Access application checklist.

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Common questions about Naperville IL bathroom remodel permits

Does Naperville require a whole-house fixture upgrade when I remodel a bathroom, like California does?

No. Illinois has not adopted California's Civil Code §1101.4 whole-house plumbing fixture upgrade mandate. A bathroom remodel permit in Naperville requires only that the permitted work itself comply with the Illinois Plumbing Code and current building code. You are not required to upgrade toilets, faucets, or showerheads in other bathrooms throughout the house as a condition of your permitted bathroom work. This is a significant and homeowner-friendly difference from California bathroom permit requirements, where a permit in one bathroom can trigger obligations to upgrade fixtures throughout the entire house.

What is the Naperville Electrical Contractor registration and why is it required?

Naperville requires electricians performing electrical work within the city to be registered as Electrical Contractors through the City's Community Services Department — this is separate from and in addition to any Illinois state electrical licensing. The registration allows the City to maintain a current list of qualified electrical contractors working within Naperville and ensures those contractors are accountable to the city's permitting and inspection process. Before hiring any electrician for bathroom remodel work in Naperville, confirm that they hold current Naperville Electrical Contractor registration, in addition to verifying any applicable state-level electrical licensing. Contact TED Business Group at (630) 420-6100 to verify a specific contractor's Naperville registration status.

Who provides electricity and gas in Naperville?

Naperville operates its own municipal electric utility — the Department of Public Utilities — Electric — serving most residential properties within the city limits. This is different from most of the surrounding DuPage County area, which is served by ComEd. For any project requiring utility coordination (service upgrades, new service, or temporary disconnection), contact Naperville Electric Operations at (630) 420-6181 or naperville.il.us/dpue. Natural gas is provided by Nicor Gas (nicorgas.com) for most Naperville residential properties. For bathroom work involving gas appliances (gas-fired water heaters adjacent to the bathroom, gas radiant heat), Nicor Gas is the contact for any gas service changes.

How long does a Naperville bathroom remodel permit take to process?

Standard bathroom trade permits (plumbing, electrical) through the Civic Access portal are typically processed within a few business days. Building permits for scopes involving structural work (wall removal) may take 1–2 weeks for plan review. Inspections are scheduled through TED Business Group at (630) 420-6100; inspection requests require advance notice. Total from permit application to final inspection for a standard plumbing-and-electrical bathroom scope: approximately 2–4 weeks, with construction timeline accounting for most of the window. File all applicable permits concurrently at the start of the project to avoid sequential delays.

TED Business Group — Naperville Building Permits 400 S. Eagle St., Naperville, IL 60540
(630) 420-6100 · buildingpermits@naperville.il.us
Hours: Monday–Friday 9 a.m.
Online: Civic Access portal at naperville.il.us

Naperville Electric Operations (DPU-E): (630) 420-6181
Nicor Gas: nicorgas.com · 1-888-642-6748

General guidance based on City of Naperville sources as of April 2026. Permits submitted April 1, 2026 or later are reviewed under 2024 ICC. For a personalized report, use our permit research tool.