Shower pan replacement cost in Seattle runs about $900 to $4,500 for most homes, and closer to $3,500 to $7,500 when the tile on the lower walls has to come off with it. The spread is wide because “replacing the pan” can mean two very different jobs: dropping in a new acrylic base, or rebuilding a waterproofed tile floor from the subfloor up.
We do a lot of these around Seattle, and the pattern is usually the same. Nobody calls about a shower pan because they want a new one. They call because something is wet that should be dry.
Here is what the work actually costs here, what drives the number, and how to tell whether you need a full replacement or just a repair.
Shower pan replacement cost in Seattle: 2026 price ranges
These are estimates for Seattle-area homes, based on current national cost data adjusted for our labor market. Every bathroom is different, so treat these as a planning range, not a quote.
| What you’re replacing | Seattle estimate (installed) |
|---|---|
| Acrylic or fiberglass pan, drain stays put | $900 – $2,000 |
| Solid-surface or cultured-marble base | $1,500 – $3,000 |
| New tile pan on a bonded waterproof membrane | $2,500 – $4,500 |
| Tile pan plus re-tiling the lower walls | $3,500 – $7,500 |
| Plumbing permit and inspection | $150 – $500 |
For reference, the national average for a shower pan replacement is around $1,620, with most jobs landing between $900 and $2,300. Seattle sits above that. Labor here runs roughly $100 to $175 an hour against a national range of $45 to $150, and that gap is most of the difference.
All prices are estimates for planning purposes. Get a written scope before you commit.
What actually drives the price
The pan material. An acrylic or fiberglass base is a manufactured part. It gets set, plumbed, and sealed, and a good crew can do it in a day. A tile pan is built on site — slope, membrane, curb, drain assembly, then tile. That is two to four days of skilled work, and it is why the price roughly doubles.
Whether the drain moves. This is the single biggest swing factor in older Seattle houses, and it gets its own section below.
What’s under the pan. If the subfloor is soft, that gets fixed first. Nobody should set a new pan over rotted plywood — it will fail again, and you will pay twice.
How much tile comes off. Pulling a pan almost always means cutting the bottom course or two of wall tile so the new waterproofing can tie in behind it. If your tile is discontinued or you have a full-height stone wall, matching it is often impossible, and the job grows into a full shower rebuild.
Access. A second-floor shower over a finished ceiling costs more than a shower on a slab, because the drain work happens from below.
The Seattle drain rule most homeowners don’t know about
Washington’s plumbing code requires a shower waste outlet and tailpiece of not less than 2 inches. Plenty of older homes around here — especially anything with a tub that got converted to a shower years ago — are still running a 1-1/2 inch drain.
There is a narrow exception. If a 2-inch waste isn’t readily available, the code allows 1-1/2 inch when an existing tub is being replaced by a shower, but only with the local inspector’s approval and only where a single showerhead rated at 1.8 gpm is installed.
Why it matters to your budget: once you open the floor, an undersized drain usually has to be brought up to code. In a one-story house that’s straightforward. In a two-story house it means opening the ceiling below, doing the work, then patching and painting. Plan for it before you start, not after.
Do you need a permit in Seattle?
Usually yes, and here is the part people get wrong.
Plumbing permits inside Seattle city limits are not issued by SDCI. They go through Public Health – Seattle & King County, which also covers unincorporated King County. SDCI handles the building permit side. Two different agencies, two different applications.
The rule of thumb: swapping a fixture in place is generally exempt, but installing, replacing, or relocating drain lines is not. Replacing a shower pan touches the drain, so it typically needs a plumbing permit. Seattle also exempts minor repairs and alterations costing $6,000 or less in any six-month period on the building side — but that exemption never covers structural work, and it doesn’t waive plumbing code compliance.
If you’re in Bellevue, Renton, or another incorporated city, the permit goes through that city instead. Any licensed contractor should be pulling this for you and scheduling the inspection. If someone tells you a shower pan doesn’t need a permit, that’s a reason to keep calling.
Signs your shower pan needs replacing
Some of these are obvious. Most aren’t.
- Water stains on the ceiling below the shower. The clearest sign, and the most expensive to ignore.
- The shower floor feels soft or spongy when you stand in it, or moves slightly underfoot.
- A tile rocks or sounds hollow when you tap it — the mortar bed under it has broken down.
- A musty smell that doesn’t clear with the fan running.
- Water showing up at the baseboard or in the flooring just outside the shower. Water travels along the subfloor before it surfaces, so the wet spot is rarely above the leak.
- Grout lines cracking in a consistent pattern along the base, or the floor no longer draining to the center.
A leak doesn’t always mean the pan is done. Sometimes it’s the drain seal, a failed caulk joint at the curb, or a cracked tile with a sound membrane underneath. That’s worth diagnosing properly before anyone starts demolition — a repair is a fraction of a replacement.
Repair or replace?
Repair makes sense when the membrane below is intact, the subfloor is dry and solid, and the problem is localized — a drain assembly, a curb joint, a few cracked tiles.
Replace when the subfloor is wet or soft, the pan has cracked through, the slope was wrong from the start and water pools, or the shower is old enough that the liner has simply reached the end of its life. Older Seattle bathrooms often have a hot-mopped or PVC-lined mud pan, and those don’t last forever.
Our honest take: if we open a floor and find rot, we tell you, we show you, and we price the repair as its own line item before we go further. Nobody should get a surprise on the final invoice.
What the job looks like from your side
Two to five days for most shower pans. Roughly:
- Protect the space, disconnect and demo the old pan, and cut back the lower wall tile.
- Inspect and repair the subfloor and framing. This is when surprises show up.
- Rough plumbing and the drain assembly, then the plumbing inspection if a permit was pulled.
- Build the pan — set the base, or pre-slope, waterproof, and flood-test a tile pan.
- Tile, grout, seal, and reset the door or glass.
The flood test is worth insisting on: plug the drain, fill the pan with a couple of inches of water, and leave it 24 hours before anything gets tiled over. It’s the cheapest insurance in the whole job.
While the floor is open is also the right moment to consider heated bathroom floors — the labor overlaps, so doing both at once costs far less than coming back later.
Related reading
- Waterproofing a bathroom shower in Seattle — how the membrane and pre-slope actually work
- How inspections work for bathroom remodels in Seattle — including the shower pan flood test
- Tub to shower conversion cost in Seattle — if you’re changing the layout, not just the floor
- Hidden costs of bathroom remodeling in Seattle
- Bathroom remodeling in Seattle — our full bathroom service
Frequently asked questions
How much does it cost to replace a shower pan in Seattle?
Most Seattle homeowners spend $900 to $4,500. An acrylic base with the drain staying put lands at the low end; a tile pan with the lower walls re-tiled runs $3,500 to $7,500. Nationally the average is about $1,620, but Seattle labor rates of $100 to $175 an hour push our numbers higher. These are estimates — get a written scope.
Can you replace a shower pan without replacing the tile?
Partly. The pan can’t be removed without cutting back the bottom course or two of wall tile, because the new waterproofing has to tie in behind it. If your tile is still available, we can match it and you’d never know. If it’s discontinued, you’re usually looking at re-tiling the walls, which is what moves the job into the higher price bracket.
Do I need a permit to replace a shower pan in Seattle?
Usually yes. Replacing a pan means working on the drain, and Seattle and King County require a permit to install, replace, or relocate plumbing. In Seattle those plumbing permits go through Public Health – Seattle & King County, not SDCI. Bellevue, Renton, and other cities issue their own.
How long does shower pan replacement take?
Two to three days for a drop-in acrylic base, and three to five days for a tile pan, since the waterproofing has to cure and flood-test before tile goes down. Add time if the subfloor needs repair or the drain has to be moved.
Why does my shower pan keep leaking after it was repaired?
Nine times out of ten, the repair addressed the surface and not the membrane underneath. Caulk and grout are not waterproofing. If water is still showing up below, the liner or the drain connection has failed and the pan needs to come out.
Is a shower pan replacement worth doing, or should I redo the whole shower?
If the walls are in good shape and you like the tile, replacing just the pan is the cheaper, faster fix. If the tile is dated, the layout doesn’t work, or you’re already re-tiling the walls to make the pan tie-in look right, you’re most of the way to a full shower rebuild — and it usually makes more sense to do it once.
Get a real number for your bathroom
Photos and a walkthrough tell us more than any calculator can. We’ll look at what’s under the floor, tell you whether it’s a repair or a replacement, and put it in writing.
Call 206-851-4233 or get in touch here and we’ll get you scheduled.
BB-Builders Pro is a licensed general contractor serving Seattle, Bellevue, Renton, and the greater King and Snohomish County area.
