Bathroom Remodel Permit in Danville, IL (2026)

Research by DoINeedAPermit Research Team · Updated May 2026

The Short Answer

A full bathroom remodel in Danville requires a permit if you relocate any plumbing fixture, add electrical circuits, install a new exhaust fan, or move walls. Surface-only work — like tile replacement or in-place vanity swap — does not need a permit.

Danville's Building Department enforces Illinois Plumbing Code and the current International Residential Code (IRC) adoption, but Danville has a notably faster plan-review process than many Illinois municipalities of similar size — most bathroom permits receive over-the-counter approval or a quick 5-7 day review rather than the 2-3 week standard elsewhere in the state. This speed depends on submitting complete, code-compliant plans upfront; incomplete applications kill the timeline advantage. Danville also requires GFCI protection on all bathroom circuits per IRC E3902, and any shower or tub relocation must include a certified waterproofing assembly (cement board + membrane or equivalent) with detail drawings — a detail that trips up many DIY applicants. The city's frost depth is 36-42 inches depending on location within Vermilion County, which affects any work that touches foundation drainage or crawl-space plumbing. Pre-1978 bathrooms may trigger lead-paint disclosure rules if you're planning to sell soon. Owner-builders can pull permits for owner-occupied homes, but the city requires the homeowner to be present at all inspections — a rule that saves money but adds scheduling complexity.

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

Stop-work orders cost $250–$500 in Danville fines, plus you'll owe double the original permit fee when re-pulling — total damage $400–$1,500 depending on scope.
Insurance claims for water damage from unpermitted plumbing work are routinely denied; you absorb the cost yourself, often $5,000–$25,000 for mold remediation and structural repair.
Selling your home triggers a TDS (Transfer Disclosure Statement) requirement in Illinois; unpermitted work must be disclosed, kills buyer confidence, and can kill the sale or drop your price 10-15%.
Lenders and home-equity lines won't refinance or advance credit on a house with unpermitted bathroom work; you're locked out of leverage for years.

Danville bathroom remodel permits — the key details

Danville's Building Department, administered through the City of Danville, adopts the Illinois Plumbing Code and enforces the 2021 IBC (verify current adoption year with the city, as adoption cycles vary). The core rule for bathroom remodels is straightforward: any work that changes the drain line, water-supply line, or vent-stack configuration requires a plumbing permit. IRC P2706 governs drainage fittings and trap sizing; if you're relocating a toilet or moving a vanity drain, the new trap arm cannot exceed 42 inches horizontally (unless a larger arm is approved in writing). Danville inspectors enforce this strictly because Illinois groundwater is often high in hard-water minerals, and improper trap geometry causes slow drains and maintenance callbacks. If your remodel adds an exhaust fan or upgrades existing ventilation, IRC M1505 requires the duct to terminate to the exterior (not the attic, not a soffit that's enclosed) — this is a common failure point. For electrical, IRC E3902 mandates GFCI protection on all 15- and 20-amp circuits serving bathroom receptacles, and any new circuit requires a separate permit and rough-electrical inspection. Pressure-balanced or thermostatic shower valves are required by code if you're installing a new valve; mixing valves must limit max temperature to 120°F to prevent scalding. Danville's permit portal is available online, but staff often recommend calling ahead (build relationship with the permit tech — they will answer quick questions over the phone and save you a trip).

Waterproofing is where Danville gets specific. Any new or relocated shower or tub must use a certified waterproofing assembly: cement board plus a membrane (kerdi, RedGard, or equivalent), or solid-surface pre-fabricated panels. Danville plan reviewers require a detail drawing showing the assembly — not a description, an actual cross-section. This rule comes from the 2021 IBC Chapter 23 and IRC R702.4.2, but Danville staff will ask for it explicitly on the first submission if missing. Budget an extra 3-5 days for resubmission if your first set omits this detail. Pre-1978 homes trigger lead-paint rules: if you're disturbing painted surfaces, you must either assume lead and follow containment/clearance rules, or conduct EPA-certified lead testing. Danville does not enforce lead paint testing itself, but buyers' inspectors will flag it, and selling without disclosure is a federal violation (and a lawsuit magnet). If you're planning to sell within 1-2 years, do the testing upfront — $300–$600 — and keep the results; it's your insurance against buyer walkaway.

GFCI and AFCI requirements in Danville are non-negotiable. Every bathroom branch circuit must be GFCI-protected; any new circuit added to the bathroom must be on its own GFCI breaker or protected by a GFCI outlet. If you're adding dedicated circuits for a heated towel bar, ventilation fan, or new lighting, each typically requires a separate breaker. Danville inspectors ask to see a one-line electrical diagram (even a hand sketch is acceptable) showing circuit locations, breaker sizes, and GFCI placement before rough-electrical inspection. Arc-fault (AFCI) protection is required on all bedroom circuits in modern code, but bathrooms per se do not require AFCI unless the circuit feeds bedroom outlets; most bathroom-only circuits need GFCI only. Confusion here causes re-inspections; clarify with the city electrician during plan review if you're unsure.

Frost depth and drainage are Danville-specific details that affect hidden work. Danville is in Vermilion County, where frost depth ranges from 36 inches (southern portion) to 42 inches (northern), depending on exact location. If your bathroom includes any work below the frost line — new drain or supply lines in a basement or crawl space — those lines must be pitched and supported to code. Illinois Plumbing Code requires a minimum 1/4-inch slope per foot on horizontal drains, and no drain can depend on siphonage or backpressure. Glacial till soil in the area is heavy and drains poorly; if you're working near an existing sump pit, coordinate with the city inspector about grading and sump discharge. Most Danville homes built before 1990 have clay-tile drains or cast-iron stacks that are deteriorating; if your remodel touches the main stack, the inspector will likely require replacement of rotted sections or, in some cases, whole-stack replacement. Budget $2,000–$8,000 if hidden work reveals stack issues.

Timeline and fee reality in Danville: a typical full bathroom remodel permit costs $250–$600 depending on estimated valuation (usually 2-3% of the project cost). Danville's online portal lets you submit plans, but many permit techs recommend walking in with a complete set and getting same-day feedback; this saves resubmissions. Plan review typically takes 5-7 business days for a complete, code-compliant submission. Once approved, you have one year to start work. Inspections are required at rough plumbing, rough electrical, framing (if walls move), and final. If you're owner-building, Danville requires you to be present at each inspection and sign off; this is non-negotiable and can delay scheduling if you have a day job. Contractors on Danville jobs must provide proof of license and insurance; unlicensed work (DIY owner-builder electrical work beyond very limited scope) can result in failed inspection and fines. Danville does allow owner-builders to perform plumbing and electrical on owner-occupied homes, but scope limits apply — consult the city before pulling a permit if you plan to do electrical work yourself.

Three Danville bathroom remodel (full) scenarios

Scenario A

In-place vanity and toilet replacement, new tile floor — Bowman Avenue bungalow

You're keeping the existing plumbing rough-in locations (toilet flange, vanity drain, supply lines unchanged). You're removing the old vanity and toilet and setting identical new fixtures in the same spots, then tiling the floor. No new drains, no new supply lines, no electrical changes. Under IRC and Danville code, this is surface-only work and does not require a permit. You do not need to call the Building Department. However, if you're living in a pre-1978 home and removing painted drywall or trim, you should either assume lead and follow containment rules (plastic sheeting, HEPA vacuum, wet wipes) or conduct a lead test first ($300–$600). The vanity swap itself is exempt, but the dust control is legally required if you don't test. Timeline: no permit timeline — work at your own pace. If you decide to upgrade the trim or add a medicine cabinet in a new location, that's still exempt. If you decide to move the vanity to the opposite wall, add an exhaust fan, or relocate the toilet, you'll need a permit — resubmit with new plans.

Scenario B

Relocate toilet to opposite wall, new drain line, upgrade plumbing rough-in — downtown Danville condo

You're moving the toilet 8 feet to the opposite wall, which requires breaking the existing drain line and running a new 3-inch drain line (with a new trap) to the main stack. This triggers a plumbing permit. The new drain must slope 1/4 inch per foot horizontally, and the trap arm cannot exceed 42 inches. Your condo is in a pre-war brick building, so the stack is likely old cast iron; the inspector will check for deterioration. You'll need a plumbing plan showing the new drain routing, trap location, vent connection, and slope. Danville's Building Department will review the plan in 5-7 days and issue the permit. Cost: $300–$500 for the permit (2-3% of estimated plumbing cost). You must schedule a rough-plumbing inspection after the new line is installed but before you close it up in walls. The inspector will verify slope, trap integrity, vent connection, and support. If the existing stack shows deterioration (common in older Danville condos), the inspector may require repair or replacement before approval — this adds $1,500–$4,000 and 2-3 weeks to your timeline. You cannot demo the existing toilet until the new line is roughed and inspected. If you also plan to add a new exhaust fan with a duct run, that's on the same plumbing permit (one permit covers all plumbing and vent work). Timeline: 5-7 days plan review, 1-2 weeks for inspection after rough-in complete. Total plumbing + permit cost: $4,000–$8,000.

Scenario C

Convert old tub to walk-in shower, new exhaust fan, dedicated 20A electrical circuit — East Main renovation

You're gutting the existing bathtub alcove and installing a large walk-in shower with a custom tile surround. This requires a plumbing permit (new drain line to relocate the tub drain to the shower pan location), an electrical permit (new 20-amp circuit for the exhaust fan and future heated floor mat or heated towel bar), and coordination with waterproofing. Danville's Building Department requires you to submit a waterproofing detail drawing for the shower: cement board (or equivalent) bonded to the studs, sealed with a membrane (Kerdi, RedGard, or similar), with weep holes and proper slope to the drain. This is not optional — the plan reviewer will request it if missing, adding a resubmission cycle. The new exhaust fan must duct to the exterior, not the attic. A typical bathroom exhaust fan pulls 50-80 CFM; you'll need a 4-inch or 5-inch duct, insulated if it runs through cold space (attic in winter). New electrical circuit: you're adding a dedicated 20-amp, 240V (or 120V, depending on the fan) circuit from the panel to the fan with a proper switch and GFCI protection. If you're adding a heated floor or towel bar, that's a second circuit or a sub-panel upgrade. Danville requires a one-line electrical diagram showing the new circuit, breaker size, and location. Permits: one plumbing permit ($350–$600) and one electrical permit ($250–$400). Plan review: 7-10 days. Inspections: rough plumbing, rough electrical, drywall (if walls are rebuilt), and final. Timeline: 3-4 weeks from permit issuance to final inspection. If the existing tub drain connects to a failing stack or if the floor framing is soft (wet subfloor), the inspector may require structural repair ($1,000–$3,000). Budget: plumbing + electrical + materials $8,000–$15,000; permits $600–$1,000; timeline 4-5 weeks.

Every project is different.

Get your exact answer →

Takes 60 seconds · Personalized to your address

Waterproofing in Danville bathrooms: the detail that fails most remodels

Danville's Building Department and plan reviewers cite IRC R702.4.2 and the 2021 IBC Chapter 23 on waterproofing, but the rule is enforced at the detail level. You cannot simply write 'waterproofing per code' on your plan; you must draw or specify the exact assembly. The standard is cement board (1/2-inch minimum) bonded to the studs with thin-set mortar, then a liquid membrane (Kerdi, RedGard, Aqua Defense, or equivalent) applied to the entire shower surround and floor. The membrane must extend at least 8 inches up the wall from the floor, and it must have weep holes at the base of the shower pan to allow water to escape to the drain. Many Danville DIY remodelers skip the membrane step or use drywall instead of cement board, thinking paint is enough; inspectors reject this immediately.

The logic: Danville's glacial-till soil and variable frost depth (36-42 inches) mean groundwater is close, especially in basements and crawl spaces. Moisture wicks upward through cast-iron and clay-tile drains. A bathroom with poor waterproofing will leak into the rim joist, causing mold and wood rot within 2-3 years. Danville sees a lot of pre-1950 homes with wood frame and stone foundation, where moisture problems compound quickly. That's why inspectors are strict on the waterproofing detail.

Practical submission: Include a 1:2 scale cross-section drawing of your shower wall assembly. Show the studs, rim board, cement board thickness, membrane location, and drain pan detail. Label the membrane product by name (not 'liquid waterproofing'), and note the thickness of application (per the product datasheet, usually 2-4 mils). Note the slope of the shower pan (minimum 1/8 inch per foot toward the drain). If you're using a prefab shower pan (acrylic or fiberglass), note its certification to ANSI Z124.1 and whether you're using a liner or a set-in method. A clear detail drawing takes 20 minutes and saves you a resubmission cycle worth 1-2 weeks.

Danville's permit portal and over-the-counter review: how to save 2 weeks

Danville's online permit portal accepts PDF submissions, but the city's staff has strong opinions about quality: incomplete submissions (missing details, poor drawing clarity, no waterproofing details) get rejected in batch reviews, meaning you wait 7-10 days to find out there's a missing page. Walking in with a complete, printed set and speaking to the permit tech face-to-face often nets same-day or next-day approval for straightforward remodels. The building office is in downtown Danville, typically open Monday-Friday 8 AM-5 PM, though hours vary seasonally. Call ahead (search 'Danville IL building permit phone') to confirm and ask if your specific project qualifies for over-the-counter review.

Why walk-in beats online: The permit tech can eyeball your plans, spot missing details in 10 minutes, and tell you exactly what's needed. If you're submitting online, each resubmission cycle costs 7-10 days. One walk-in conversation can collapse a 3-week plan-review timeline to 5 business days. Danville staff are not combative; they want you to succeed. They'll tell you if your trap-arm slope is questionable or if your GFCI placement needs adjustment. Bring three printed sets (one for review, one for your file, one for the inspector). Bring a USB drive with PDFs as backup.

One caution: if your remodel involves structural work (removing walls, sistering joists, replacing rim board), or if the building is pre-1950 and potentially affected by historic-district overlay rules, the city may route your permit to a plan-review committee, which adds 2-3 weeks. Danville does not have a city-wide historic district, but some neighborhoods have local historical society oversight. Verify before you submit; the permit tech can tell you in 2 minutes if your address is affected.

City of Danville Building Department
Danville City Hall, Danville, IL (confirm current location and hours with city)
Phone: Search 'Danville IL building permit phone' or call Danville City Hall main line to reach the Building Department | https://www.danvilleil.org (check for 'Permits' or 'Building Department' link; exact URL varies)
Monday-Friday, 8 AM-5 PM (verify with city; hours may vary seasonally)

Common questions

Do I need a permit to replace my bathroom faucet or toilet in Danville?

No, if you're replacing the faucet or toilet in the same location with the same type (toilet for toilet, faucet for faucet). This is surface-only work and exempt under IRC and Danville code. If you're relocating the toilet to a new wall or moving the vanity drain, you'll need a plumbing permit. Lead paint dust containment may be required if your home was built before 1978.

Do I need a permit for a new exhaust fan in my Danville bathroom?

Yes. Any new or relocated exhaust fan requires a plumbing/vent permit (typically $250–$400) and an electrical permit ($200–$350) if you're adding a new circuit. The duct must terminate to the exterior, not the attic or soffit. The fan must be sized to the bathroom square footage (typically 50-80 CFM for a standard bathroom). Danville inspectors verify duct termination and duct support during rough inspection.

What's the cost of a bathroom remodel permit in Danville?

Permit fees are typically $250–$600 for a plumbing permit, $200–$400 for electrical, and $150–$300 for a general construction permit (if walls move or structural work is done). Fees are based on the estimated valuation of the work (usually 1-3% of the project cost). A full bathroom remodel with fixture relocation, new electrical, and waterproofing runs $600–$1,200 in combined permits. Call the Building Department or check the permit portal for the exact fee schedule.

Can I do the electrical work myself on a bathroom remodel in Danville?

Danville allows owner-builders to pull electrical permits on owner-occupied homes, but the scope is limited and the homeowner must be present at all inspections. A simple 20-amp circuit for an exhaust fan is typically within scope; complex panel upgrades or circuits that feed other areas of the house are not. Consult the Building Department before pulling the permit if you plan to do electrical work yourself.

How long does it take to get a bathroom remodel permit approved in Danville?

Plan-review time is typically 5-7 business days for a complete, code-compliant submission (one with waterproofing details, electrical one-line diagram, and plumbing slope shown). Walking in with printed sets and speaking to the permit tech often speeds approval to same-day or next-day. Once approved, you have one year to start work. Inspection timeline (rough plumbing, electrical, final) typically spans 2-4 weeks depending on contractor schedule.

Do I need a waterproofing detail drawing for my Danville bathroom shower remodel?

Yes. Danville's plan reviewers require a cross-section drawing showing the shower assembly: cement board, membrane (Kerdi, RedGard, or equivalent), studs, rim board, and drain pan slope. The membrane must extend at least 8 inches up the wall and have weep holes at the base. A missing or vague waterproofing detail is the most common reason for resubmission. A clear one-page detail drawing (1:2 scale) takes 20 minutes and prevents a 7-10 day delay.

What happens if I remodel my bathroom without a permit in Danville?

If plumbing work is discovered unpermitted, a stop-work order ($250–$500 fine) is issued, and you'll owe double the original permit fee plus any fines. Insurance may deny claims for water damage if work is unpermitted. When you sell, unpermitted work must be disclosed on the TDS, which often kills buyer confidence or drops price 10-15%. Lenders will not refinance or issue home-equity lines on unpermitted bathroom work.

Are there any lead-paint rules for bathroom remodels in Danville pre-1978 homes?

Yes. If your home was built before 1978 and you're disturbing painted surfaces (walls, trim, cabinets), you must either assume lead and follow EPA containment rules (plastic sheeting, HEPA vacuum, wet wipes) or conduct EPA-certified lead testing ($300–$600). The Building Department does not enforce lead paint itself, but buyers' inspectors will flag it, and selling without disclosure is a federal violation. For remodels, lead testing is often cheaper and cleaner than full containment.

What's the frost depth in Danville, and does it affect my bathroom remodel?

Danville's frost depth is 36-42 inches depending on exact location in Vermilion County (36 inches south, 42 inches north). If your bathroom includes work below the frost line (basement drain, new supply lines in crawl space), those lines must be properly pitched and supported per Illinois Plumbing Code. Danville's glacial-till soil drains slowly, so proper slope (1/4 inch per foot on horizontal drains) is critical to prevent backups. If your remodel touches the main drain stack and the stack is deteriorating, the inspector may require repair or replacement ($2,000–$8,000).

Can I pull a bathroom remodel permit as an owner-builder in Danville?

Yes, for owner-occupied homes. Danville allows owner-builders to pull plumbing and electrical permits, but you must be present at all inspections and sign off on the work. The city does not allow unpermitted work, and any unlicensed contractor work on your job may void the permit. Owner-builder permits are cheaper (no contractor markup) but require your time and attendance; budget time for scheduling inspections around your day job.

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 Danville 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
Danville, Illinois?