Bathroom Remodel Permit in Burien, WA (2026)

Research by DoINeedAPermit Research Team · Updated May 2026

The Short Answer

A full bathroom remodel needs a permit if you're relocating any plumbing fixture, adding electrical circuits, installing a new exhaust fan, converting tub-to-shower, or moving walls. Surface-only updates (tile, vanity swap in place, faucet replacement) typically don't. Burien Building Department enforces King County code with particular rigor on waterproofing documentation and exhaust-fan duct termination — issues that commonly trigger plan rejections.

Burien's Building Department operates under King County code and the 2021 Washington State Building Code (which adopts the IRC with state amendments). The city-specific wrinkle: Burien is in climate zone 4C west, which means lower frost depth (12 inches) and higher rainfall risk — this pushes exhaust-fan compliance and shower waterproofing assembly documentation to the top of the inspector's checklist. Many homeowners and contractors moving from Seattle proper or Tacoma miss that Burien's online permit portal (accessible through the city website) requires a pre-submission sketch showing duct routing and waterproofing details BEFORE a formal plan-review appointment. Plan rejection rates run higher in Burien than in neighboring Des Moines or SeaTac specifically because the city requires a sealed waterproofing specification (cement board + membrane brand, or pre-fabricated shower system) to be named on the plan — generic language gets sent back. Owner-builders can pull permits on owner-occupied homes, but the city strongly recommends having a licensed plumber and electrician sign off on rough inspections. Timeline is typically 2–4 weeks for a straightforward gut remodel, but can stretch to 6 weeks if waterproofing or duct routing requires corrections.

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

King County Code enforcement officers responding to neighbor complaints or post-sale inspections have shut down mid-remodel bathrooms and issued stop-work orders carrying $500–$1,500 fines per violation.
Unpermitted bathroom work voids homeowner's insurance coverage for water damage and mold — a six-figure exposure in the wet Puget Sound climate.
Lenders and title companies block refinancing or sale closings until unpermitted work is removed or retroactively permitted (which costs $300–$600 plus inspection fees).
A non-compliant shower waterproofing or GFCI installation discovered during a home sale triggers a Seller's Disclosure requirement and can kill the deal or cut 3–5% off the final price.

Burien full bathroom remodel permits — the key details

The threshold question: does anything move or does anything new get added? Relocating a toilet, sink, or tub — even six inches — triggers a permit. Adding an exhaust fan where none existed, adding a new electrical circuit, converting a tub to a curbless shower, or moving a wall all require permits. The Washington State Building Code (which Burien enforces) and King County amendments spell this out in the residential chapter. If you're keeping fixtures in place and only replacing the tile, vanity, faucet, or toilet with the same-location same-rough-in equivalent, you're generally exempt. However, Burien Building Department staff have flagged cases where a homeowner thought they were doing a "vanity swap" but actually had to extend the water-supply or drain lines — that small extension pushed the project into permit territory. Call the Building Department with photos and dimensions before starting; a 10-minute clarification call can save weeks of doubt.

Waterproofing is the top reason for plan rejections in Burien. The Washington State Building Code adopted IRC R702.4.2, which requires a continuous waterproofing membrane for shower and tub surrounds. Burien building staff want the SPECIFIC system named on your permit plan: "cement board plus 6-mil polyethylene membrane," or "Schluter-KERDI system," or "pre-fabricated acrylic shower surround," not just "waterproofing per code." If you're relocating a tub or converting a tub to a shower, the waterproofing assembly changes — this is a code trigger. You'll also need a licensed contractor signed onto the project (or a licensed plumber for plumbing, licensed electrician for electrical), or you'll need to be the owner-builder and sign the owner-builder affidavit. Burien does allow owner-builders on owner-occupied homes, but the city inspects more carefully when an unlicensed owner is pulling permits.

Exhaust-fan ventilation is the second common rejection. IRC M1505 requires a minimum 50 CFM continuous exhaust from a bathroom, and the ductwork must terminate outside (not into an attic). Burien inspectors want to see on your plan: the CFM rating of the fan, the duct diameter (typically 4 inch), the run length, and the vent termination location (soffit, gable wall, or roof — with a damper to prevent backflow). If your ductwork run is longer than 20 feet, or has more than two bends, many contractors upsize to 5 or 6 inch ducts to maintain CFM. This detail trips up DIY submissions; don't leave it vague. Include the manufacturer and model number of the fan on your electrical plan.

Plumbing fixture relocations and drain-trap geometry create tricky code compliance issues. If you're moving a toilet from one wall to an adjacent wall and need to extend the 3-inch drain line, you must maintain the proper trap-arm length (the horizontal distance from the trap seal to the vent). IRC P2705 caps trap-arm length based on pipe diameter — a 3-inch toilet drain trap arm cannot exceed 6 feet. If your existing vent stack is far from the new toilet location, you may need to install a new branch vent, a new vent stack, or a wet vent — all of which require plan documentation. Burien Building Department plan reviews catch out-of-spec trap arms regularly. If you're moving a vanity sink, confirm the P-trap rough-in is still accessible and the hot-and-cold supply lines don't exceed 20 feet from the water heater (code requirement for water-heating efficiency). Again, get specifics on your plan.

Electrical code for bathrooms in Burien leans heavily on GFCI protection and AFCI requirements per NEC and the Washington State Electrical Code. Every outlet within 6 feet of a sink (wet areas) must be GFCI-protected. If you're adding new circuits (e.g., a heated towel rack, a new exhaust fan with a 120V switch), you'll need to show the circuit loading, the breaker size, and the wire gauge on an electrical plan. Many older Burien homes have 100-amp or 125-amp service; if your new circuits exceed 20–30% of available capacity, the city may require a service upgrade before final approval. This is not a rejection, but it's a surprise cost. License requirement: you can do cosmetic work (outlet replacement in place) as an owner-builder, but if you're adding new circuits or running new wire, a licensed electrician must sign the work and pull the permit. Burien enforces this strictly.

Three Burien bathroom remodel (full) scenarios

Scenario A

Vanity and toilet swap in place, new tile, exhaust fan in existing location — West Burien 1970s rambler

You're ripping out an old vanity and toilet and installing new ones in the exact same rough-in locations, retiling the walls and floor with cement board backing, and replacing the exhaust fan with a new 50 CFM unit in the same ceiling spot. No plumbing lines move, no new electrical circuits added (the exhaust fan connects to the existing switch and ductwork), and no wall relocation. This is a cosmetic bathroom remodel and does NOT require a permit in Burien. However, there's a gray area: if the old ductwork is disconnected and a new duct run (even to the same soffit vent termination) has to be installed, some inspectors argue that triggers a permit because it's "new ventilation work." To be safe, call Burien Building Department with photos of the existing exhaust setup. If the old ductwork is reusable and you're simply dropping a new fan into the existing collar, no permit. If you're installing new ductwork, even though the termination location doesn't change, you need a permit — and the fee is typically $150–$250 because it's a minor electrical/mechanical permit. Timeline: no permit, no inspections, start whenever. Cost: vanity ($300–$1,500), toilet ($150–$400), tile and labor ($3,000–$8,000), exhaust fan and ductwork ($200–$600). Total $3,650–$10,500 with no permit fees. If ductwork triggers a permit: add $200–$300 in fees and 1–2 weeks for plan review.

Scenario B

Full gut, toilet relocated 8 feet, tub-to-curbless-shower conversion, new vanity wall — Des Moines neighborhood, 1950s brick bungalow

You're gutting the bathroom, moving the toilet to the opposite wall (requiring a new or extended 3-inch drain line and a new vent connection), ripping out a standard alcove tub and installing a curbless walk-in shower with a linear drain (IRC R702.4.2 waterproofing required), replacing the vanity, and adding a new exhaust fan with dedicated ductwork. You're also removing a half-wall between the bathroom and adjacent bedroom to open the space. This is a FULL PERMIT project. The toilet drain will require trap-arm geometry review: if the existing vent stack is 15 feet away, you'll need a new branch vent, which must be shown on a plumbing plan. The shower waterproofing assembly must be specified: cement board plus 6-mil polyethylene, or Schluter-KERDI, or a pre-manufactured curb-less assembly with integrated drain. Burien Building Department will require: a plumbing plan (drain/vent routing, trap configuration, water-supply locations), an electrical plan (new GFCI circuits for fan and any new outlets, AFCI if required), and a framing/wall-removal detail (if the half-wall is load-bearing, it needs a header). Owner-builder is allowed if the home is owner-occupied; otherwise, a licensed plumber and electrician must sign the plumbing and electrical work. Plan review: 3–5 weeks. Inspections: rough plumbing (drain and vent before concrete/wall closure), rough electrical, framing (wall removal), drywall, and final. Timeline: 4–6 weeks from permit issuance to final inspection. The permit application requires a sketch showing duct termination (soffit, gable, or roof) and damper type. Costs: permit $300–$700 (based on $15,000–$25,000 project valuation), plumbing labor and materials $2,500–$5,000, electrical labor and materials $1,000–$2,500, shower waterproofing assembly $800–$2,000, vanity and fixtures $500–$2,000, tile and labor $2,000–$4,000, miscellaneous (drywall, framing, trim) $1,500–$3,000. Total $8,600–$21,200 including permit fees.

Scenario C

In-place sink and toilet refresh, adding heated towel rack circuit and GFCI outlets — Seahurst waterfront, 1980s split-level, owner-builder

You're not moving the toilet or sink, just replacing fixtures in place and upgrading bathroom outlets to GFCI. But you want to add a 120V circuit for a heated towel rack (new branch circuit) and relocate an outlet to accommodate new tile layout. Adding a NEW electrical circuit is a permit trigger, even though the plumbing isn't moving. The outlet relocation is also technically a change (new wire run), so the conservative answer is: you need a permit for the electrical work, typically $150–$300 (minor electrical permit). However, Burien Building Department treats outlet relocation in place (same wall, same circuit, just 12 inches over) as cosmetic if the circuit already serves multiple outlets and you're not exceeding the outlet count. A heated towel rack on a NEW dedicated circuit is unambiguous: it's a permit. As an owner-builder on an owner-occupied home, you can pull the permit yourself, but you must sign the owner-builder affidavit and schedule a rough electrical inspection before closing walls. Some owner-builders skip this and get away with it; others face a code-compliance letter if a future buyer's inspector flags the unlabeled circuit. Best practice: call Burien Building and describe the heated towel rack addition. If they say "minor electrical, $150 permit," pull it. If they say "routine outlet swap, no permit," confirm in writing via email. Timeline: 1–2 weeks if it's a minor permit, or same-day approval if deemed cosmetic. Costs: permit $0–$300, heated towel rack and circuit labor $300–$800, outlet GFCI upgrade $150–$300, tile and labor $1,500–$4,000. Total $1,950–$5,400 depending on permit classification.

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Waterproofing and wet-area assembly — why Burien inspectors are so strict

Burien sits in the heart of the Puget Sound 4C climate zone with 55+ inches of annual rainfall. Water intrusion into walls and structural cavities is a chronic problem in the region, and bathrooms are the #1 leak source. The Washington State Building Code adopted IRC R702.4.2 with Washington-specific amendments that require a "continuous" waterproofing membrane, not just "water-resistant" drywall. Burien Building Department has seen enough mold damage and structural rot in older homes that inspectors now demand specificity: they want the product name and installation method spelled out on the permit plan before the work starts. Generic language like "waterproofing per code" gets rejected.

There are three compliant systems: (1) cement board with 6-mil polyethylene membrane taped and sealed; (2) proprietary liquid or membrane systems (Schluter-KERDI, Wedi, Durock PreSeal); (3) pre-fabricated fiberglass or acrylic shower surrounds with integrated waterproofing. The choice affects your timeline and cost. Cement board plus poly is the cheapest ($300–$600 for materials) but requires careful taping and sealing — it's easy to miss a seam. Schluter-KERDI is a rubber-like membrane that bonds directly to drywall and is more forgiving; it costs $500–$800 and is favored by professional tile contractors. Pre-fab surrounds (typical cost $1,200–$2,500) are the fastest and most foolproof. On your permit plan, you MUST specify which system and include the manufacturer's installation guide (or a summary) as an appendix. Burien inspectors will ask to see it during rough framing inspection.

One more wrinkle specific to Burien: if you're installing a curbless (zero-threshold) shower, the floor must slope toward the drain at a minimum 2% gradient, and the membrane must extend at least 12 inches onto the adjacent floor before the slope transitions. This detail is often missed in DIY plans and triggers a second review cycle. If you're unsure, hire a tile contractor who has pulled permits in King County before — they know the local inspector preferences.

Owner-builder rules and licensing requirements in Burien

Washington State law allows owner-builders to pull residential permits on owner-occupied homes without a general contractor license, but Burien Building Department enforces a stricter-than-average interpretation. An owner-builder can do the work themselves, but if PLUMBING is involved (any drain, vent, or supply-line change), a licensed plumber must sign off on the rough plumbing inspection. Similarly, if ELECTRICAL circuits are added, a licensed electrician must sign off. Non-structural work (tile, painting, fixture swaps in place) can be owner-done. The reason: liability and code compliance. A homeowner who installs a toilet drain trap arm three inches too long or bundles a new 240V line incorrectly has no insurance, and future buyers have no recourse. Burien's inspectors check owner-builder affidavits carefully and often require the licensed plumber or electrician name and license number on the permit application itself.

Practical impact: if you're doing a full bathroom gut with plumbing and electrical changes, you'll almost certainly need to hire a licensed plumber and electrician (or one combo firm that does both). The owner-builder affidavit saves you on the general contractor markup (10–20% of labor), but you still pay the plumber and electrician directly. Cost savings: roughly 10–15% on labor compared to hiring a GC, but the permitting process may take longer because Burien staff vet owner-builder submissions more carefully. Timeline expectation: 4–6 weeks vs. 2–3 weeks with a licensed contractor who knows local inspector preferences. Licensing requirements also apply if you're moving to a new home; you cannot pull a permit as owner-builder on a rental property or a home you don't own or are in the process of closing on — Burien will ask for a proof-of-ownership document (deed or title).

City of Burien Building Department
Burien City Hall, 15200 Ambaum Boulevard SW, Burien, WA 98166
Phone: (206) 242-6350 (verify current number with city) | https://www.burienwa.gov/residents/building-permits (Burien online permit portal; search for
Monday–Friday, 8:00 AM–5:00 PM (closed holidays; confirm online)

Common questions

Do I need a permit if I'm only replacing my bathroom vanity and faucet in the same location?

No permit needed if the vanity and faucet rough-in locations don't change. However, if the new vanity requires re-plumbing (moving water-supply lines or drain lines, even slightly), a permit is required. Call Burien Building Department with photos of the current setup and the new vanity dimensions to confirm; a 5-minute call can save confusion.

What's the cost and timeline for a full bathroom remodel permit in Burien?

Permit fee: $300–$800 depending on project valuation (typically 1.5–2% of estimated cost). Plan review timeline: 2–5 weeks, depending on completeness of your submission and whether the inspector requests changes. Inspection sequence: rough plumbing, rough electrical, framing (if applicable), drywall, and final — typically 4–5 inspections spread over 4–8 weeks. Total time from permit issuance to final sign-off: 6–10 weeks is realistic for a full gut remodel.

Are there any specific waterproofing brands or systems that Burien Building Department prefers?

No single preference, but the inspector wants the specific system NAMED on your permit plan. Cement board plus 6-mil polyethylene, Schluter-KERDI, Wedi shower boards, or pre-fabricated acrylic surrounds are all code-compliant. Include the manufacturer's installation guide or a summary in your permit packet. Don't use generic language like "waterproofing per code" — that gets rejected.

Can I do a full bathroom remodel as an owner-builder without a contractor license?

Yes, if the home is owner-occupied. However, if plumbing or electrical changes are involved, a licensed plumber or electrician must sign off on the rough-in inspections. You can pull the permit as owner-builder, but you'll likely need to hire licensed trades. This saves you the general contractor markup (10–20%) but doesn't eliminate the cost of the skilled labor itself.

What if I'm relocating my toilet to a new wall? What does the plumbing plan need to show?

Your plumbing plan must show: (1) the 3-inch drain line route and length from the toilet to the vent stack, (2) the trap-arm distance (must not exceed 6 feet for a 3-inch line), (3) the vent connection (branch vent, new vent stack, or wet vent), and (4) the distance from the drain to the vent connection. If the new location is far from the existing vent, you may need a new branch vent or vent stack — this adds cost and complexity but is required by code. Burien inspectors catch trap-arm violations regularly.

What happens if the bathroom exhaust fan ductwork run is longer than 20 feet?

For runs over 20 feet, or with more than two bends, you should upsize the ductwork from 4 inches to 5 or 6 inches to maintain the minimum 50 CFM (cubic feet per minute) at the termination. Smaller ducts create backpressure and reduce fan efficiency. Your permit plan should specify the duct diameter, the CFM rating of the fan, and the vent termination location (soffit, gable wall, or roof with a damper). Burien inspectors verify this during the rough electrical inspection.

Is there a difference in permit requirements for a shower conversion vs. a tub-to-shower conversion?

Yes. Converting an existing tub to a shower changes the waterproofing assembly (the shower walls require a continuous membrane per IRC R702.4.2, whereas a tub alcove may have only water-resistant drywall). This assembly change triggers a permit. A straight shower-surround tile replacement in an existing shower stall is cosmetic (no permit). If in doubt, describe the existing setup and your plan to Burien Building — they'll clarify whether a permit applies.

Do I need a permit if I add a heated towel rack or a new exhaust fan switch to my bathroom?

Adding a heated towel rack on a NEW electrical circuit requires a permit (minor electrical, typically $150–$300). If the towel rack ties into an existing circuit with spare capacity, some inspectors may classify it as a fixture addition (no permit), but this is borderline. Replacing an existing exhaust fan with a same-sized, same-location unit is cosmetic (no permit); installing a new fan or new ductwork requires a permit. When in doubt, call Burien Building Department — they can clarify over the phone in 5 minutes.

What happens if my bathroom remodel doesn't pass the Burien building inspection?

The inspector will issue a rejection or conditional approval noting specific code violations (e.g., "trap-arm length exceeds 6 feet," "waterproofing detail not specified," "duct termination not shown"). You'll have 10–30 days to correct the issue and request a re-inspection. Minor corrections (e.g., adding a damper to the vent, sealing a waterproofing seam) can be done without re-submitting plans; major corrections (e.g., relocating a drain line) may require a revised plan and another review cycle. This can add 2–4 weeks to your timeline.

What's the lead-paint disclosure requirement for a bathroom remodel in Burien on a pre-1978 home?

If the home was built before 1978, you must provide a lead-hazard information pamphlet to occupants and disclose any known lead paint before beginning disturbance (EPA Renovation, Repair, and Painting Rule). If you're disturbing paint (tile removal, wall demolition, etc.), a certified lead-safe renovator should supervise or your work must follow lead-safe practices (containment, HEPA vacuuming, cleaning verification). This is not a Burien-specific rule — it's federal — but inspectors in the region are aware and may ask for proof of compliance. Budget $200–$500 for lead-safe practices or certification if your home is pre-1978.

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 Burien Building Department before starting your project.

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