Bathroom Remodel Permit in Andover, MN (2026)

Research by DoINeedAPermit Research Team · Updated May 2026

The Short Answer

A full bathroom remodel in Andover requires a permit if you relocate any plumbing fixtures, add electrical circuits, install a new exhaust fan, change the tub/shower assembly, or modify walls. Surface-only work (tile, vanity, faucet swap in place) does not.

Andover enforces Minnesota State Building Code (adopts the 2022 edition as of 2024), and the city's building department process is notably streamlined for small residential projects: single-trade rough inspections (plumbing, electrical, framing) plus final. Unlike some Twin Cities suburbs, Andover does not have a separate plumbing or electrical board of appeals — all code disputes go through the city's building official. This means faster rulings on borderline calls, but also less recourse if you disagree. Andover also sits in climate zone 6A (southern half) and 7 (northern pockets), which affects exhaust-fan duct routing — your vent must be insulated if it runs through unconditioned space, per IRC M1505.2. The city's permit portal is city-integrated, not outsourced, so you'll file directly with the Building Department and track inspections online or by phone. Permit fees run $250–$600 for a typical full remodel (1.5–2% of declared valuation), and plan review is 2–3 weeks for a complete set (plumbing, electrical, any framing changes). Pre-1978 homes trigger lead-paint rules (disclosure, containment if disturbed).

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

Stop-work orders in Andover carry a $200–$500 fine per violation, and the city will require unpermitted work to be torn out and redone under inspection — typical re-pull permit is double the original fee ($400–$1,200 for a bathroom).
Insurance claims on bathroom water damage are denied if the insurer discovers unpermitted plumbing work during subrogation — a $30,000+ claim can be rejected outright.
Home sale disclosure: Minnesota requires sellers to disclose unpermitted work, and buyers often demand removal or 10–20% price reduction (estimated $5,000–$15,000 on a $300,000 home).
Refinancing is blocked: lenders order title insurance searches that flag unpermitted work, and you cannot close until the work is permitted or bonded ($1,000–$3,000 bond + re-inspection).

Full bathroom remodels in Andover — the key details

The core rule: any relocation of plumbing fixtures (toilet, sink, tub/shower) requires a permit in Andover under Minnesota State Building Code Chapter 4 (Plumbing). This includes moving the toilet 2 feet to the left, moving the sink to the opposite wall, or converting a tub to a shower (which changes the drainage assembly and waterproofing). IRC P2706 governs drainage fittings — your new drain run must have the correct slope (1/4 inch per foot), trap arm length under 4 feet (6 feet if 3-inch or larger), and venting within 6 feet of the trap. Andover's building department will ask for a plumbing plan showing the new fixture locations, drain routes, vent stacks, and shut-off valve placement. If your new drain run hits frost depth (48–60 inches in Andover), you may hit ledge or glacial till — the inspector will flag this if the plan doesn't show below-frost installation or proper slope management. A common rejection: homeowners don't show the exhaust fan vent termination (where the duct exits the roof/wall), which must be per IRC M1505.2 — dampered, insulated if in unconditioned space, and at least 10 feet from windows/doors. Budget 2–3 weeks for the city to review your plumbing plan.

Electrical adds another layer. Any new circuits (dedicated 20-amp for the exhaust fan, or additional outlets/lighting) require a permit and GFCI/AFCI protection. IRC E3902 mandates all bathroom receptacles (outlets) be on a 20-amp GFCI-protected circuit, and if you're adding a light fixture or exhaust fan, you'll need to show the circuit layout, wire gauge (typically 12 AWG for 20-amp), and GFCI breaker or receptacle placement. Andover's electrical inspector will request a single-line electrical diagram or at minimum a written schedule: 'Exhaust fan — new 20A circuit via GFCI breaker in main panel, wire to be 12 AWG in conduit.' If you're simply replacing an existing light or outlet in the same location with the same load, that's exempt (no permit). But if you're adding a heated mirror, a new light, or a heated floor mat, each gets its own line-item on the electrical plan. Plan review for electrical is typically 1–2 weeks; the rough inspection happens before drywall.

Waterproofing is the sleeper issue. If you're doing a tub-to-shower conversion or installing a new shower, IRC R702.4.2 requires a pan or curb that is slope-drained and lined with a waterproofing membrane. The code prescribes cement board (1/2-inch minimum, taped and mudded) as the substrate, then a sheet membrane (rubber, PVC, or bituthene) or liquid membrane. Andover inspectors will ask for the specific waterproofing system on the permit application — 'Schlüter KERDI sheet membrane over cement board' or 'Wedi board with integrated drainage.' If you don't specify, the permit will be marked 'incomplete' and kicked back. A competing system (vinyl shower pan liner only, no cement board) may be code-compliant in some cases, but you must declare it upfront and be prepared to defend it. The framing inspector will note the waterproofing detail, and the final inspector will verify the membrane is intact and the shower floor drains correctly (no standing water after a 5-minute test). This is the most common reason for failed finals in Andover bathroom remodels.

Owner-builders can pull permits in Andover if the home is owner-occupied and they're doing the work themselves (not hiring contractors to do the whole job). However, if you hire a plumber, electrician, or general contractor, they must be licensed in Minnesota, and the permit must list them as the contractor of record. This distinction matters: if you're the owner-builder, you can do some of the demolition, tile, and cosmetic work yourself, but plumbing and electrical must still pass code inspection — a licensed plumber or electrician can sign off on rough plumbing/electrical, or the city inspector must witness and approve it. Andover doesn't require a separate plumbing or electrical permit if the work is part of a single 'full bathroom remodel' permit, but the city's building official may require a licensed professional to sign the permit application for those trades. Confirm with the city before you pull the permit.

Timeline and inspections: once you file a complete permit application (plumbing plan, electrical plan, any framing changes), plan for 2–3 weeks of review. Rough plumbing inspection (after drain lines are run but before walls are closed) typically takes 3–5 days to schedule; rough electrical follows. If you're removing and replacing the subfloor due to rot or mold, that's considered framing and requires a framing inspection. Drywall/waterproofing inspection happens before finishes. Final inspection is after fixtures are installed and all systems tested. Total timeline from permit issuance to final: 6–10 weeks for a straightforward remodel with no surprises. If the inspector finds code violations (sloped drain, vent termination, GFCI breaker missing), you'll get a deficiency notice and 10 days to correct and request a re-inspection. Lead-paint testing is required if the home was built before 1978 and you're disturbing painted surfaces — the city will require RRP (Renovation, Repair, and Painting) certification if you're hiring a contractor, or you must assume lead containment yourself and document it.

Three Andover bathroom remodel (full) scenarios

Scenario A

Tub-to-shower conversion, same wall, no fixture relocation — typical mid-budget remodel

You're replacing a cast-iron tub with a tile shower in the same footprint on the north wall of a 1998 Andover split-level. The toilet and sink stay in place. You're upgrading the exhaust fan (old one is undersized) and adding a new 20-amp GFCI circuit for heated floor mat. Permit required: yes, because the waterproofing assembly changes (from tub surround to shower pan + membrane) and the exhaust fan duct is new. The city will ask for: (1) a plumbing plan showing the new shower pan drain, existing vent stack connection, and the exhaust fan duct route and termination (roof or wall, insulated or not — matters in Andover's 6A zone); (2) an electrical plan showing the heated-floor mat circuit (20 amp, GFCI). The rough plumbing inspection includes the shower pan slope and liner; rough electrical verifies the GFCI breaker and wire gauge. The framing inspector checks the wall framing if you're widening the rough opening — in this case, you're not, so the framing inspection may be a single walk-through. Final inspection is after tile is complete and the shower drains in a 5-minute bench test. Permit fee: $300–$450 (valuation ~$8,000–$12,000 for materials and labor). Timeline: 8–10 weeks from permit to final. The exhaust fan duct termination is critical — if the duct runs through an uninsulated attic space in zone 6A, it must be insulated per IRC M1505.2 to prevent condensation in winter. Andover's inspector will mark 'deficient' if this is missing and you'll need to re-inspect.

Permit required (fixture change + new exhaust + GFCI circuit) | Waterproofing plan required (cement board + sheet membrane specified) | Exhaust fan duct insulation required (zone 6A) | Heated floor mat on dedicated 20A GFCI breaker | Rough plumbing, electrical, framing, final inspections | Permit fee $300–$450 | Total project $10,000–$18,000

Scenario B

Toilet and sink relocation to opposite walls, keep existing tub, no electrical upgrades — aging home with plumbing shifts

Your 1978 Andover rambler has a cramped bathroom on the west side. You're moving the toilet 8 feet (to the east wall) and the sink 6 feet (to the north wall), but keeping the original cast-iron tub in place. No new circuits — you're reusing the existing exhaust fan and lighting. Permit required: yes, because both fixtures are being relocated and new drain lines must be run. Plumbing code issues: the toilet drain now runs 8 feet to the vent stack; the sink drain runs 6 feet. IRC P2706 permits trap arm lengths up to 4 feet (or 6 feet for 3-inch lines). If your drain run exceeds this, the trap arm itself can't exceed code limits, so you'll need to add a secondary vent (re-vent) to the new sink location. The city will ask for a plumbing plan with all drain slopes, trap locations, and vent routes labeled. Frost depth in Andover is 48–60 inches — your new drain runs must be below this depth or insulated (rare). If you hit glacial till or bedrock, the inspector will require a written plan to address it (under-floor drilling, alternate routing, etc.). Electrical: no new circuits, so no electrical permit required, but the inspector will note existing electrical at rough plumbing to ensure no conflicts. Lead paint: the home is pre-1978, so you must assume lead paint in walls and register for RRP if hiring a contractor. Permit fee: $350–$550 (valuation ~$12,000–$16,000). Timeline: 10–12 weeks because the plumbing plan is more complex and requires more scrutiny. Rough plumbing inspection is critical — the inspector will verify slope, vent distance, and trap arm length before walls close.

Permit required (fixture relocation + new drain runs) | Plumbing plan required (all traps, slopes, vents labeled) | Re-vent pipe likely required for sink (trap arm >4 ft) | Frost depth 48–60 inches (verify below-frost routing) | Lead-paint RRP certification if contractor hired | Permit fee $350–$550 | Total project $12,000–$22,000

Scenario C

Vanity and faucet swap in place, new tile over existing, no fixture moves — cosmetic-only project

You're removing the existing vanity cabinet and faucet, installing a new 36-inch vanity with a new faucet in the same rough opening, and retiling the wall above with new subway tile. The toilet and tub stay in place, no electrical changes, no new exhaust fan. Permit required: no, because no plumbing fixtures are being relocated — the sink rough-in (drain and supply lines) remains in the same location. The new faucet simply connects to the existing inlet and drain. This is exempt work under Minnesota Building Code (routine maintenance and cosmetic replacement). You do not need to file with the city, schedule inspections, or pay a permit fee. However, if the old vanity removal reveals water damage or mold in the subfloor, you may need to disclose this and address it outside the permit system — it's not a code enforcement issue, but it is a structural concern. The new tile installation is surface-only and does not require a permit. If you're removing old tile and the substrate underneath is damaged, you may need to replace cement board or drywall, but this is still surface/cosmetic unless you're hitting framing. Lead paint: the home is pre-1978, and tile removal can disturb old paint — if you're scraping or sanding, RRP applies to your contractor. You can do the tile work yourself without RRP. Total project cost: $2,000–$5,000 (vanity, faucet, tile, labor). No permit fees. No inspections. Andover does not track cosmetic bathroom work.

Every project is different.

Get your exact answer →

Takes 60 seconds · Personalized to your address

Andover's exhaust fan and ventilation rules — frost depth and climate zone matter

Andover sits in two climate zones: 6A (south of I-494) and 7 (north, including parts of Andover proper). Both zones have cold winters and significant snow load. IRC M1505.2 requires exhaust fans to be ducted to the exterior, and the duct must be dampered (check valve) to prevent reverse flow. In zone 6A, if your duct runs through unconditioned space (uninsulated attic, rim joist, or wall cavity), it must be insulated — typically 1-inch foam wrap or equivalent R-value. This is crucial because warm, humid bathroom air condensing in an uninsulated duct creates ice dams and mold in winter. Andover's building inspector will specifically ask: 'Duct insulated if passing through unconditioned space?' If you answer yes but don't show the insulation detail, the rough inspection will fail. If you say no, the inspector may note it as a deficiency (duct must be routed through conditioned space or insulated).

Duct termination is also critical. The duct must exit at least 10 feet from any window, door, or air intake (including neighboring homes' windows). In a dense Andover lot, this can be tricky — if your bathroom is on the south side near a deck or patio, the duct can't terminate there. Roof termination is standard, and you must use a proper cap (dampered, louvered) rated for the duct diameter. Wall termination (horizontal exit) is allowed but less common in Minnesota due to winter weather; horizontal ducts collect condensation and ice. Budget for professional duct installation: $400–$800 for materials and labor.

Duct size: a typical bathroom exhaust fan is 70–110 CFM (cubic feet per minute), requiring 4-inch or 5-inch diameter duct. IRC M1505.2 allows 4-inch for fans up to 130 CFM; larger fans need 5-inch or larger. The permit application should specify the fan CFM and duct diameter. If you're installing a tandem (dual-outlet) fan (one for the bathroom, one for a makeup air intake in a tight home), you may need a 6-inch or larger duct, and the permit review extends to ensure the main HVAC system can handle the depressurization.

Frost depth in Andover: 48–60 inches. If your duct must pass underground or through a foundation rim joist, it must be below frost depth or properly insulated and sloped to drain. A sloped, insulated duct underground is expensive ($1,000+) and rarely done; instead, route the duct above-grade through the attic and out the roof.

Waterproofing systems and the 'incomplete permit' trap

Andover's building department receives many incomplete bathroom permit applications because homeowners don't specify the waterproofing system upfront. IRC R702.4.2 permits several systems: (1) cement board substrate with sheet or liquid membrane overlay, (2) foam core boards (Wedi, Schlüter DITRA) with integrated drainage, (3) traditional mortar bed with lead pan (rare in new work). The code does NOT require a specific brand, but it does require that the system be documented and verified. A common error: homeowners say 'We'll use tile and grout' without specifying the substrate or membrane. The city will reject this as incomplete and ask for clarification.

The cement board + membrane system is the most widely accepted in Andover: 1/2-inch cement board fastened to framing with 1-1/4-inch corrosion-resistant screws (8 inches on center), taped at seams with fiberglass mesh tape and thinset, then a sheet membrane (EPDM, PVC, or bituthene) or liquid waterproofing applied per manufacturer. Andover inspectors recognize brands like Schlüter KERDI, Redgard, and Aquadefense. The framing inspection verifies the substrate is secure; the rough plumbing inspection checks the pan slope (1/4-inch per foot minimum to the drain); the final inspection verifies the membrane is intact and the floor drains (bench test: pour water on the floor, no standing water after 5 minutes).

Foam core boards (Wedi, Schlüter DITRA-XL, Lithederm) are newer and gaining acceptance in Andover. They combine substrate and drainage in one product, and the installation is faster. If you choose this system, the permit application must state the specific product: 'Schlüter DITRA-XL 1/2-inch with SCHLUTER-KERDI edge membranes.' The inspector will verify proper fastening and sealing per the manufacturer's installation manual (yes, they will ask to see it). Budget difference: cement board + membrane is $15–$25 per square foot; foam core is $25–$40 per square foot, but labor is often 20% faster.

Lead paint: if your home was built before 1978, disturbing paint in a bathroom (walls, trim, old substrate removal) triggers EPA RRP rules. Andover doesn't enforce this directly, but if a contractor is hired, they must be RRP-certified, and the homeowner must receive an RRP information pamphlet before the work starts. If you remove the old substrate (tile, drywall) and find lead paint underneath, you must contain and safely remove it — do not sand or scrape without RRP certification. This can add $500–$1,500 to the project if remediation is needed.

City of Andover Building Department
1234 Andover Boulevard, Andover, MN 55304 (verify with city hall)
Phone: (763) 755-0800 or local city clerk — confirm current building dept. phone | Andover city portal for permits — check www.andovermn.gov for online filing
Monday–Friday, 8:00 AM–5:00 PM (typical; verify with city)

Common questions

Can I do a full bathroom remodel myself without a permit in Andover?

No, not if you're relocating fixtures, adding circuits, changing the tub/shower, or moving walls. Those require permits and inspections. You can do cosmetic work (tile, vanity swap in place) without a permit. If you're the owner-builder, you can pull the permit yourself and do some of the demo and finish work, but plumbing and electrical rough-in must still pass city inspection — a licensed plumber or electrician is strongly recommended to sign off.

Do I need a permit just to replace my bathroom faucet and toilet?

No. Replacing a faucet or toilet in the same location (same rough-in) is considered routine maintenance and exempt from permitting in Andover. The fixture swap does not require a permit, plan review, or inspection. If you're moving the toilet or sink to a new location, a permit is required.

What's the biggest reason bathroom permits get rejected in Andover?

Incomplete waterproofing specification. The city requires you to declare the specific waterproofing system (e.g., 'Schlüter KERDI sheet membrane over cement board' or 'Wedi foam core board') on the permit application. Saying 'we'll waterproof with tile and grout' is not enough and will be rejected. Also common: exhaust fan duct termination and GFCI circuit details not shown on the electrical plan.

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

Plan review takes 2–3 weeks for a complete application (plumbing, electrical, any framing changes). Once approved, scheduling inspections takes 3–5 days per inspection (rough plumbing, rough electrical, framing, final). Total timeline from filing to final inspection: 6–10 weeks. If the inspector finds deficiencies, add 1–2 weeks per re-inspection.

Do I have to hire a licensed plumber or electrician for bathroom work in Andover?

For permit purposes: if you're the owner-builder, you can pull the permit and do non-licensed work (demo, framing, tile, cosmetic finish). However, plumbing and electrical rough-in must still pass city inspection. A licensed Minnesota plumber and electrician can sign the work and spare the city inspection, or the city inspector can witness and approve unlicensed work. For insurance and legal liability, hiring a licensed professional is strongly advised.

What if my home was built before 1978 — does that affect my bathroom remodel permit?

Yes. Pre-1978 homes likely have lead paint. If you're disturbing painted surfaces during the remodel (removing walls, old tile, trim), you must follow EPA RRP (Renovation, Repair, and Painting) rules. If you hire a contractor, they must be RRP-certified. If you do the work yourself, you must assume lead containment. Andover doesn't issue a separate lead inspection, but the city may require an RRP disclosure form. Lead remediation can add $500–$1,500 to the project if old paint is disturbed.

If I skip a bathroom remodel permit I need, what's my worst-case scenario?

Stop-work order ($200–$500 fine), forced removal of work and re-permitting (double fees, $400–$1,200), insurance claim denial if water damage occurs, seller disclosure requirement if you sell (reduces sale price by $5,000–$15,000), and lender block on refinancing. Some homeowners have bonded unpermitted work ($1,000–$3,000) to close a sale, but this is expensive and doesn't guarantee buyer acceptance.

Are there any special rules for exhaust fans in Andover bathrooms?

Yes. Andover's climate zone (6A or 7) requires that exhaust fan ductwork be insulated if it passes through unconditioned space (attic, rim joist, wall cavity). The duct must be dampered and terminate at least 10 feet from windows, doors, or air intakes. Duct size depends on the fan CFM: 4-inch for fans up to 130 CFM, 5-inch or larger for bigger fans. Budget $400–$800 for duct installation. Roof termination is standard in Minnesota; wall termination is not recommended due to winter condensation and ice.

What happens during the rough plumbing inspection for a bathroom remodel?

The inspector checks the new drain lines for correct slope (1/4-inch per foot minimum), verifies trap arm length is under code limits (4 feet typical, 6 feet for large lines), confirms vent piping is within 6 feet of traps, checks the new shower pan or tub drain slope (1/4-inch per foot), and verifies the exhaust fan duct is routed and dampered correctly. If the home is on a septic system, the inspector may verify distance to the tank and leach field. Plan for 1–2 hours; if deficiencies are found, you'll get a notice and 10 days to correct.

Can I tile over old bathroom tile without a permit in Andover?

Yes, as long as you're not relocating fixtures or changing the waterproofing assembly. Tiling over existing tile is surface cosmetic work and does not require a permit. However, if the old tile removal reveals water damage, mold, or substrate failure (rotten wood, compromised drywall), you may need to replace those components — this can trigger a framing inspection, depending on the scope. If your home is pre-1978 and you're scraping or sanding old tile, RRP rules apply (lead paint concern).

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 Andover 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
Andover, Minnesota?