Bathroom Remodel Permit in Batavia, IL (2026)

Research by DoINeedAPermit Research Team · Updated May 2026

The Short Answer

A full bathroom remodel in Batavia requires a permit if you relocate plumbing fixtures, add electrical circuits, install a new exhaust fan, convert tub-to-shower, or move walls. Surface-only work — tile, vanity, or fixture replacement in the same location — is exempt.

Batavia follows Illinois Building Code and the 2021 IRC, but unlike some neighboring municipalities that have adopted faster plan-review streamlining, Batavia's Building Department maintains a traditional full-review workflow for bathroom permits — that means 2–5 weeks before you can begin, not over-the-counter same-day approval. Batavia's permit portal (available through the city website) requires online filing, and the department is strict on waterproofing documentation for tub-to-shower conversions; they will reject any shower assembly plan that doesn't specify the membrane system (cement board + liquid membrane, schluter edge-banding, or comparable) upfront. Batavia is in ICC Climate Zone 5A (northern), which triggers 42-inch frost depth considerations if any new drain lines extend below grade — a detail many homeowners overlook on basement-bath remodels. Owner-builder permits are allowed for owner-occupied homes, but you must pull the permit yourself (you cannot have a contractor pull it in your name unless they're licensed). The fee typically runs $300–$600 for a standard full remodel, plus $50–$100 per inspection.

What happens if you skip the permit (and you needed one)

Stop-work orders cost $500–$1,500 in fines, plus you'll owe double the original permit fee and cannot legally continue work until the permit is pulled retroactively.
Insurance denial: if there's a water leak or electrical fire traced to unpermitted plumbing or wiring, your homeowner's policy can deny the claim — a $50,000+ bathroom flood can become your liability alone.
Home sale disclosure: Illinois requires written disclosure of unpermitted work; buyers can void the deal or demand $10,000–$25,000 credit at closing.
Lender refusal: if you refinance or take out a HELOC, the lender's appraisal or title search may flag unpermitted work and block the loan.

Batavia bathroom remodel permits — the key details

Batavia's Building Department requires a permit for any bathroom work that involves fixture relocation, new electrical circuits, exhaust fan installation, wall removal, or tub-to-shower conversion. IRC R405.2 mandates that any relocated plumbing fixture must comply with minimum trap-arm length (40 inches max from trap to vent, measured horizontally) and slope requirements (1/4 inch per foot minimum). If your bathroom is on an upper floor and the drain stack is in the exterior wall, Batavia's 42-inch frost depth (per Illinois frost-depth tables) may require the drain to be insulated or re-routed — this is often discovered during rough-plumbing inspection and can delay the job by 2–3 weeks if not planned ahead. The permit application requires a site plan showing the bathroom's location, a floor plan with fixture locations and dimensions, and electrical/plumbing layout sheets if circuits are being added or fixtures moved. Online submission through Batavia's permit portal is the default; phone submission is not allowed. Plan-review fees are typically included in the permit fee ($300–$600), but if the reviewer requires revisions, a $50–$100 re-review fee may apply per resubmission.

Electrical work in bathrooms triggers strict NEC and Illinois requirements. IRC E3902.10 requires all receptacles within 6 feet of a sink or tub to be GFCI-protected; if you're adding a new vanity location, a new circuit with GFCI breaker or GFCI outlet is required. Batavia's electrical inspector will not sign off a rough-electrical inspection without a clear notation on the electrical plan showing which circuits are GFCI-protected and which outlets are AFCI-protected (arc-fault, required for sleeping-area circuits if the bathroom is adjacent). Many homeowners assume a single GFCI outlet protects all downstream outlets on that circuit — it does, but the plan must show this explicitly, and a spare receptacle for ventilation fan control cannot be on the GFCI-protected circuit (it must have its own dedicated or shared circuit with other non-GFCI loads). If you're upgrading the exhaust fan or adding a new one, IRC M1505.2 requires a minimum 80 cfm continuous fan or 20-minute timer; ductwork must be unsupported and insulated if it passes through unconditioned space (attic, crawlspace) and must terminate outside with a damper, not in an attic or crawlspace. Batavia's plan-review checklist explicitly calls out exhaust duct termination location; if your plan shows the duct ending in the attic or soffit, it will be rejected.

Waterproofing for tub-to-shower conversions is the #1 rejection reason in Batavia. IRC R702.4.2 requires a water-resistant or waterproof membrane behind all shower walls; Batavia's building code interpretation requires the membrane to be one of: cement board (at least 1/2 inch) with a liquid-applied waterproof membrane (like Hydro Ban or Aqua Defense), or a pre-formed system like Schluter-KERDI or equivalent. The permit application must include the brand/model of the waterproofing product and the installation method — simply writing 'cement board and sealant' is not enough and will trigger a rejection letter. If you're relocating the shower valve (mixing valve) to a different wall, the rough-plumbing inspection must verify that the valve is pressure-balanced (per IRC P2722) and that the trim ring alignment allows for proper access after tile installation. Some homeowners attempt DIY tile-and-mortar waterproofing without a membrane; Batavia's inspector will stop the job on-site and require removal and re-installation with approved membrane. If the tub-to-shower conversion involves structural changes (removing a wall or widening the opening), a second inspection tier is triggered: framing, then drywall (if applicable), then final. This adds 1–2 weeks to the timeline.

Lead-paint hazard rules apply to all Batavia homes built before 1978. If your bathroom was constructed before 1978, the permit application must include a Lead Paint Disclosure (Illinois Environmental Protection Act). The contractor must be EPA RRP-certified (Renovation, Repair, and Painting) if disturbing more than a small area of paint; failure to comply triggers $500–$2,500 per-day fines from the EPA, separate from Batavia's permit enforcement. Many homeowners skip this step because they think tile work doesn't count — it does if you're cutting, sanding, or removing substrate (even drywall behind tiles). Batavia's building permit fee covers permit issuance and one final inspection; additional inspections (rough-plumbing, rough-electrical, framing, drywall) are typically included in the permit, but a re-inspection for a failed inspection is $50–$100 each. Owner-builder applicants must pull the permit in their own name and must be present or represented at all inspections; a licensed contractor cannot sign off as 'responsible charge' on an owner-builder permit.

Timeline and practical next steps: Once you submit the permit application online (or by phone if Batavia allows — confirm with the department), expect 5–7 business days for initial plan review. If the reviewer approves without comments, you'll receive the permit the same day and can schedule rough-plumbing inspection. If revisions are required, you'll receive a rejection letter with specific items (typically missing waterproofing detail, electrical plan clarity, or fixture-location dimensions); resubmit within 2 weeks to stay on track. Once the permit is issued, you have 180 days to begin work; if the job extends beyond that, you must request an extension (usually granted once). Inspections in order are: rough-plumbing (before walls close), rough-electrical (after plumbing), framing (if walls are moved), drywall (optional if not full gut), and final (after all trim, fixtures, and tile). Each inspection must be requested 24 hours in advance via phone or portal; Batavia's inspector typically responds within 2 business days. Final inspection sign-off is required before the permit is closed and before you obtain a Certificate of Occupancy (or in this case, a Certificate of Compliance for interior remodel). Budget 6–10 weeks total from permit pull to final approval, assuming no major revisions or failed inspections.

Three Batavia bathroom remodel (full) scenarios

Scenario A

Vanity and tile swap in existing locations, new GFCI outlet added — Batavia historic district

You're replacing the existing vanity with a new one of the same width in the same location, retiling the shower surround with matching dimensions, and adding a GFCI outlet above the vanity for a heated towel rack. This is a partially-exempt project: the vanity swap and tile refresh are surface-only (no permit needed), but the new GFCI outlet requires a permit because it involves adding a new electrical circuit. Batavia's historic district overlay (homes on Main Street, Spring Street, and surrounding blocks circa 1890–1950) adds a wrinkle: if your bathroom is in a designated historic structure, the Historic Preservation Commission may review exterior elements (soffit vent for exhaust fan, if visible from street), which adds 1–2 weeks. In this case, you're only adding an outlet, so HPD review is unlikely unless the circuit routing is visible. File a bathroom-remodel permit with electrical add-only scope; the application is minimal (2–3 pages, floor plan showing new outlet location, electrical schematic). Permit fee is $250–$350 (lower tier because it's electrical-add only, not full remodel). Expect 5–7 days plan review. One rough-electrical inspection (30 minutes). Total timeline: 2–3 weeks. Rough-plumbing inspection is not required because the drain/vent stack is untouched. Lead-paint disclosure required if pre-1978 home, but only the vanity and tile area are disturbed, so RRP contractor certification likely not required (check with the city — rules vary by disturbance area). Cost estimate: $250–$350 permit, $100–$200 for inspection trip, vanity $600–$2,000, tile/labor $3,000–$8,000, electrical outlet $200–$500, total project cost $4,000–$10,500.

Scenario B

Tub-to-shower conversion with relocated valve, new exhaust fan duct — Batavia suburb (West Side)

You're gutting a 1980s bathroom on the second floor of a ranch home, converting the tub to a walk-in shower with a relocated mixing valve (moving it 4 feet to a new wall), and upgrading the exhaust fan duct from a passive wall vent to an active dampered duct exiting the roof. This is a full-permit project because all three elements trigger code review: tub-to-shower conversion (waterproofing assembly change), fixture relocation (plumbing), and new exhaust duct (mechanical). The second-floor location adds complexity because the drain stack must navigate the 42-inch frost depth and potential rim-joist challenges; if the house is built on a frost wall or piers (common in Batavia's older suburbs), the new drain rough-in must be verified by a plumber familiar with Illinois frost depth rules. Batavia's Building Department requires a full-remodel permit application: site plan, floor plan with old/new fixture locations and dimensions, electrical plan (GFCI/AFCI notation), plumbing plan (trap-arm length, vent routing, mixed valve pressure-balance spec), and mechanical plan (exhaust fan CFM rating, duct size, insulation, termination detail). Waterproofing plan is critical — you must specify the exact product (e.g., Schluter-KERDI plus primer, or cement board model + Aqua Defense brand, with installation sequence). Plan review typically takes 7–10 days; one resubmission is common (usually to clarify exhaust duct routing or waterproofing product). Once approved, inspections in order: rough-plumbing (vent-stack positioning, drain slope, trap-arm length), rough-electrical (GFCI circuit, exhaust fan switch/timer), framing (if walls are modified), drywall, and final. Total timeline 5–8 weeks (assuming no major rejections). Permit fee $500–$700 (higher because of full-remodel scope and multiple trades). Lead-paint disclosure required if pre-1978; RRP contractor certification needed if paint is disturbed during demo. Cost estimate: $500–$700 permit, $400–$600 inspections (4 trips), tub removal and demo $1,500–$3,000, shower base/walls/tile $8,000–$15,000, plumbing relocation $2,000–$4,000, exhaust fan duct upgrade $800–$1,500, electrical circuit/GFCI $500–$1,000, total project $13,000–$25,000.

Scenario C

Wall removal to open bathroom, new half-bath fixture location — Batavia owner-builder, single-family

You're an owner-occupant removing a non-load-bearing wall between the master bath and a closet to expand the bathroom, relocating the toilet and sink to new locations, and adding a new vanity on the opened-up wall. This is the most complex permit scenario: wall removal (structural review), fixture relocation (plumbing), and likely electrical circuit changes (new GFCI). Batavia requires owner-builder permits to be filed by the owner, not a contractor, and the owner must be present at all inspections. The permit application must include a structural engineer's letter confirming the wall is non-load-bearing (or a structural plan if it is load-bearing and requires a beam), floor plans with old/new fixture locations, plumbing schematic, electrical plan, and framing detail for any new structural support. If the wall is load-bearing, you must hire a structural engineer ($500–$1,500 for the letter and plan), and Batavia's framing inspection becomes more rigorous — the inspector verifies beam sizing, bearing points, and joist hangers per IRC R502. The plumbing portion requires a detailed plan showing trap-arm lengths for both relocated fixtures (max 40 inches each), vent routing (must re-tie to existing stack or run new vent), and new GFCI circuit for the relocated sink location. Many homeowners in this scenario discover mid-project that the existing drain stack is in an exterior wall at frost depth (42 inches), and rerouting requires insulation or re-location — this can add $2,000–$5,000 and 2–3 weeks if discovered during rough-plumbing inspection. Batavia's Building Department is strict on this point because Illinois frost-depth rules are enforced statewide. Permit fee $600–$900 (highest tier due to structural involvement). Plan review 10–14 days (structural engineer review adds time). Inspections: framing (before drywall), rough-plumbing, rough-electrical, drywall, final. Total timeline 8–12 weeks. Owner-builder status means no contractor insurance is required, but the owner is liable for code compliance; if an inspection fails, the owner must correct it or hire a licensed contractor to do so. Cost estimate: $600–$900 permit, $600–$1,500 structural engineer, $1,000–$2,000 wall removal/framing, $3,000–$6,000 plumbing relocation and new rough-in, $1,500–$3,000 electrical, drywall/tape/mud $1,500–$3,000, fixtures/tile $8,000–$15,000, total project $16,000–$32,000.

Owner-builder permit (owner must pull and attend inspections) | Structural review required for wall removal | New plumbing fixture locations (trap-arm and vent re-routing) | Frost-depth considerations (exterior wall stacks) | Permit fee $600–$900 | 6 inspections (framing, plumbing, electrical, drywall, final) | 8–12 week timeline | Structural engineer letter/plan $500–$1,500 | No contractor insurance required (owner liable)

Every project is different.

Get your exact answer →

Takes 60 seconds · Personalized to your address

Batavia's online permit portal and plan-review workflow

Unlike some Illinois municipalities that allow walk-in permit pulls or phone submissions, Batavia's Building Department routes all bathroom-remodel permits through their online portal (accessible via the city website). The portal requires account registration, PDF file uploads (floor plan, electrical schematic, plumbing plan, waterproofing spec if applicable), and online payment. The system generates an auto-confirmation email with a permit number and file ID; this is not your approved permit, only a receipt. A plan reviewer then examines your submission within 5–7 business days and either approves it (permit is issued same day) or sends a rejection letter via email detailing required revisions. The portal does not accept phone calls or in-person submissions for remodels, though you can call the department to ask clarification questions on a rejection letter. Re-submissions after rejection typically take another 5–7 days for review (no expedited re-review option). If your resubmission has minor edits (e.g., clarifying waterproofing product), approval is likely; if major items are missing (e.g., no electrical plan at all), another rejection cycle occurs. Pro tip: before uploading, call the Building Department at least once to confirm the exact file format and content required for your project type — missing one item causes a full rejection, not a partial approval. The portal is most reliable accessed on desktop, not mobile; uploads frequently fail on mobile devices.

Batavia's Building Department staff are generally responsive to clarification emails sent through the portal, but response time is 2–5 business days. If you're under time pressure (e.g., contractor starting in 2 weeks), get ahead by submitting your application early and being ready to revise within 24 hours of receiving feedback. The department's FAQ page (on the city website) explicitly states that full-remodel permits require complete electrical and plumbing schematics; if you submit a minimal sketch, expect rejection. Conversely, over-detailed plans (100-page engineering drawings) slow down review because the inspector must comb through irrelevant detail. Aim for clarity: 8.5x11 floor plan, labeled fixture locations with dimensions, plumbing schematic with trap-arm measurements and vent routing, electrical plan with GFCI notation, and one-page waterproofing detail if applicable. Color-coded drawings (blue for plumbing, red for electrical) help the reviewer and reduce rejection risk.

Waterproofing requirements and common rejection triggers in Batavia

Batavia's interpretation of IRC R702.4.2 is stricter than some downstate Illinois municipalities. The code requires a water-resistant or waterproof membrane behind shower walls, but Batavia's building official has clarified (via FAQ and past permit rejections) that the membrane must be a discrete, tested product — not field-applied mud or drywall. Approved systems include: cement board (1/2 inch minimum, per manufacturer install guide) plus a liquid-applied waterproof membrane (Hydro Ban, Aqua Defense, RedGard, or equivalent); pre-fabricated waterproof panels (Schluter-KERDI, Wedi board, or equivalent); or vinyl membrane liners (older standard, less common now). The permit application must specify the exact product name and model; writing 'waterproof membrane' alone will be rejected. If you're unsure which product to use, call the Building Department or ask your tile contractor — they usually know which products the local inspector accepts. Common rejection scenario: homeowner submits plan saying 'cement board and caulk'; inspector rejects it because caulk is not waterproof and not a tested membrane per code. The corrected plan must specify the liquid-applied membrane product, installation sequence, and curing time. Another common trigger: the waterproofing plan doesn't show how the membrane extends into the valve area and handles the mixing-valve trim ring — if the trim ring is mounted over the membrane (correct) or behind it (incorrect), the rejection letter will point this out. Batavia's inspector also verifies that waterproofing extends 6 inches up the wall above the showerhead (IRC R702.4.2), so the plan must show this dimension. If you're converting a tub to a walk-in shower, the base/curb area is the trickiest detail — many DIYers assume grout alone is sufficient; it's not. The slope toward the drain, the membrane's extension under the base, and the sump area (if used) must all be specified. One more catch: if the shower walls will be tiled, the tile grout must be epoxy or urethane (not sanded grout), and this should be noted in the waterproofing plan so the inspector knows to check grout type during final inspection.

Batavia's historical rejection data (shared by the building department upon request) shows that 40% of bathroom-remodel rejections cite incomplete waterproofing documentation. To avoid this, include a one-page waterproofing detail sheet with your permit application that shows: (1) the membrane product name and model, (2) where it begins and ends (e.g., 6 inches above showerhead, full width of back wall), (3) installation sequence (order of application), (4) curing time before tiling, and (5) how it handles penetrations (valve, grab bars, etc.). If you're hiring a contractor, ask them to prepare this sheet before you submit; if doing it yourself, consult the manufacturer's installation guide or the Tile Council of North America's waterproofing guidelines. Batavia does not require a third-party waterproofing inspector, but the rough-in inspection (before drywall or tile) may include a photo of the membrane so the permanent record shows it was installed. Once the plan is approved and you've passed rough inspection, do not deviate from the approved waterproofing method — if you decide mid-project to use a different product or skip the membrane in one corner, the final inspection will fail and the work must be redone.

City of Batavia Building Department
100 N. Island Avenue, Batavia, IL 60510 (or check Batavia city website for exact address and hours)
Phone: Call City of Batavia main number and ask for Building Department; permit portal available online via city website | https://www.batavia.il.us (look for 'Permits' or 'Building Permits' link)
Monday–Friday, 8:00 AM–5:00 PM (verify via website; hours may vary)

Common questions

Do I need a permit if I'm just replacing my toilet, sink, and vanity in the same locations?

No, if all three fixtures remain in their existing locations and you're not adding any electrical circuits or changing vent routing. This is cosmetic-only work. However, if the sink is relocating even a few feet (to accommodate a new vanity width), or if you're adding a new electrical outlet for the vanity lights, a permit is required. The gray area is vanity replacement — if the new vanity has the same drain/supply rough-in points, it's exempt; if the plumbing connections shift location, it's not.

How much does a bathroom-remodel permit cost in Batavia?

Permit fees range from $250 (electrical or cosmetic additions only) to $900 (full remodel with structural changes). The fee is based on the project's valuation (estimated cost of work). For a $15,000 remodel, expect $400–$600. The fee typically includes the permit issuance and one final inspection; additional inspections (rough-plumbing, rough-electrical, framing, drywall) are usually bundled in, but re-inspections for failed inspections cost $50–$100 each. Call the Building Department to get an exact quote based on your scope and estimated cost.

What if I'm converting a tub to a shower — do I absolutely need an approved waterproofing product, or can I just use good grout and caulk?

You absolutely need an approved waterproof membrane behind the shower walls. Batavia's code (per IRC R702.4.2) requires a discrete, tested product — grout and caulk alone are not sufficient. Approved systems include cement board plus liquid-applied waterproof membrane (Hydro Ban, Aqua Defense, RedGard, etc.), or pre-fabricated waterproof panels (Schluter-KERDI, Wedi board). If you submit a plan without this, it will be rejected. Once approved, the inspector will verify the membrane is installed during rough inspection before drywall or tile covers it.

I'm an owner-builder — what are the rules for pulling a bathroom-remodel permit in Batavia?

Owner-builder permits are allowed for owner-occupied homes in Batavia. You must pull the permit in your own name (a contractor cannot pull it for you or sign it). You must be present or represented at all inspections. You are liable for code compliance — if an inspection fails, you must correct the issue or hire a licensed contractor. Owner-builder permits have the same fee and timeline as contractor permits. You do not need contractor's insurance or a business license, but you may face higher insurance liability if something goes wrong.

How long does plan review typically take in Batavia, and can I start work before approval?

Plan review takes 5–7 business days for initial review; if revisions are required, add another 5–7 days. You cannot legally start any work until the permit is issued and approved — starting before approval can trigger stop-work orders and fines ($500–$1,500). Once the permit is issued, you have 180 days to begin work; if you need more time, request an extension (usually granted once). Keep the issued permit on-site during all work.

What's the difference between a bathroom remodel and a bathroom addition — do they have different permit paths?

Yes, they are different. A remodel is work inside an existing bathroom (moving fixtures, converting tub to shower, changing walls). An addition is creating a new bathroom where one did not exist (new walls, new plumbing stack, new electrical service). Additions require a separate permit, often a full addition permit, and may involve zoning review (setbacks, lot coverage), structural review, and utility line extensions. Remodels are simpler because they work within existing infrastructure. This article focuses on remodels; if you're adding a bathroom, contact Batavia's Building Department for a different permit scope.

If my house was built before 1978, do I have special lead-paint rules for a bathroom remodel?

Yes. Illinois Environmental Protection Act requires a Lead Paint Disclosure for homes built before 1978. When you file the permit, you must include the disclosure. If your remodel disturbs more than a small area of paint (e.g., removing drywall, sanding substrate), the contractor must be EPA RRP-certified (Renovation, Repair, Painting). RRP-certified contractors follow containment and cleanup protocols to minimize lead dust. Violations carry EPA fines of $500–$2,500 per day, separate from permit fines. Ask your contractor if they're RRP-certified; if not, they may not be qualified for your project.

What inspections do I need for a full bathroom remodel in Batavia, and how do I schedule them?

Inspections depend on scope. For a basic remodel with fixture relocation and new exhaust duct: rough-plumbing (vent/drain positioning), rough-electrical (GFCI/AFCI circuits), and final (all work complete). For a remodel with wall removal: add framing (after walls are framed) and drywall (before tile). Request inspections 24 hours in advance via the permit portal or by phone to the Building Department. The inspector typically responds within 2 business days with an appointment. Each inspection takes 30 minutes to 1 hour. Re-inspections (if the prior inspection failed) cost $50–$100 each.

Can I do the bathroom work myself, or does a licensed contractor have to do it?

In Illinois, owner-builders can do their own work if they pull an owner-builder permit for an owner-occupied home. However, some work (plumbing, electrical) may require licensed subcontractors depending on Batavia's local rules — call the Building Department to clarify. Plumbing and electrical rough-ins must often be inspected, and some inspectors require the licensed plumber/electrician to be present at inspection, even if the homeowner performed the work. If you hire a contractor, they must have a valid Illinois license and a Batavia business license. Always verify contractor licenses via the Illinois Department of Financial and Professional Regulation.

What happens if I finish the bathroom without scheduling an inspection or getting a final sign-off?

The permit remains open and unpaid. The city can issue a violation notice and require you to bring in the inspector for a final walkthrough before the permit closes. If you attempt to sell the house without a final sign-off, the title company may require a retroactive inspection or letter from the building official, which adds cost and delay. Insurance claims (water damage, electrical fire) may be denied if the work is unpermitted. Refinancing or appraisals may flag unpermitted work as a defect. Always request the final inspection once work is complete.

Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current bathroom remodel (full) permit requirements with the City of Batavia Building Department before starting your project.

More permit guides

National guides for the most-asked homeowner permit projects. Each goes deep on code thresholds, common rejections, fees, and timeline.

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