Walk-in Shower Installation Guide for Washington Homeowners
A walk-in shower is the single most popular bathroom upgrade for homeowners in King County, Snohomish County, and Skagit County. Whether you're converting a bathtub, replacing an old shower stall, or building from scratch — this guide covers costs, materials, timelines, and what to expect from the installation process.
What Is a Walk-in Shower?
A walk-in shower is a shower enclosure with a low-threshold or zero-threshold entry — no tub to climb over. They typically feature:
- A flat or nearly-flat entry (curbless or low-curb)
- Tile, stone, or composite wall surfaces
- A glass enclosure or open design
- A linear or center drain
- Built-in niches for storage
Walk-in showers are popular because they're safer, easier to clean, more accessible, and look more modern than traditional tub/shower combos.
How Much Does a Walk-in Shower Cost in King and Snohomish County?
Based on projects we've completed in 2025-2026:
By Material Type
| Shower Type | Cost Range | Timeline |
|---|---|---|
| Composite/solid-surface panels | $5,000 – $8,000 | 2-4 days |
| Standard tile (subway, ceramic) | $8,000 – $14,000 | 5-6 days |
| Large-format tile (24"x48"+) | $12,000 – $18,000 | 5-7 days |
| Natural stone (marble, travertine) | $15,000 – $25,000+ | 6-8 days |
| Custom mosaic/pattern tile | $14,000 – $22,000 | 7-10 days |
What's Included in These Prices
- Demo of existing tub or shower
- Plumbing modifications (moving drain, adding valves)
- Waterproofing (Kerdi membrane or equivalent)
- Subfloor/wall prep
- Material and installation
- Shower pan (tile-ready or prefab)
- Glass enclosure (frameless standard)
- Fixtures (showerhead, valve, handle)
- Cleanup and haul-away
What Adds to the Cost
| Add-on | Additional Cost |
|---|---|
| Tub removal (vs. shower-to-shower) | $500 – $1,500 |
| Moving plumbing (drain relocation) | $800 – $2,000 |
| Heated floor in shower | $500 – $1,200 |
| Built-in bench | $400 – $800 |
| Extra niches (beyond 1) | $200 – $400 each |
| Rain-head + handheld combo | $300 – $800 |
| Body jets | $500 – $1,500 |
| ADA grab bars | $150 – $400 |
| Curbless/zero-threshold entry | $500 – $1,500 |
Tub-to-Shower Conversion: What's Involved
Converting a bathtub to a walk-in shower is our most common project. Here's what it requires:
Plumbing Changes
- The drain moves from the tub position to the shower position (usually center or linear)
- The valve height may need adjustment (tub valves are lower than shower valves)
- Supply lines may need rerouting
Structural Changes
- The tub alcove walls get opened up for waterproofing
- The subfloor gets reinforced for the new shower pan
- A new shower pan (mortar bed or prefab) gets installed
- Walls get waterproofed with membrane before tile
Timeline
A typical tub-to-shower conversion takes 4-6 days:
- Day 1: Demo tub, rough plumbing
- Day 2: Shower pan, waterproofing
- Day 3-4: Tile walls
- Day 5: Tile floor, grout
- Day 6: Glass, fixtures, trim
Choosing Your Shower Materials
Wall Materials
Composite/Solid-Surface Panels
- Pros: Fast install (1-2 days), no grout to maintain, seamless look
- Cons: Limited design options, can look "prefab"
- Best for: Budget projects, rental properties, quick turnarounds
Ceramic/Porcelain Tile
- Pros: Endless design options, durable, classic look
- Cons: Grout maintenance, longer install time
- Best for: Most homeowners who want a custom look
Large-Format Tile (24"x48" and larger)
- Pros: Minimal grout lines, modern/luxury appearance, easier to clean
- Cons: Harder to install (requires experienced installer), more expensive
- Best for: Homeowners who want a high-end, contemporary look
Natural Stone
- Pros: One-of-a-kind appearance, timeless elegance
- Cons: Requires sealing, more expensive, heavier
- Best for: Luxury remodels, statement bathrooms
Floor Materials
- Mosaic tile (2"x2" or smaller) — provides grip, classic look, more grout to clean
- Pebble tile — natural look, excellent grip, harder to clean
- Large-format with texture — modern look, fewer grout lines, must have slip-resistant finish
- Linear drain with large tile — allows full-size tile on floor, sleek modern look
Fixtures
Showerheads:
- Fixed rain-head (ceiling or wall mount)
- Handheld on slide bar
- Combination (rain-head + handheld)
- Body jets (multiple wall-mounted sprays)
Valves:
- Pressure-balance (standard, prevents temperature spikes)
- Thermostatic (premium, maintains exact temperature)
Finishes:
- Chrome (classic, cheapest)
- Brushed nickel (popular, hides water spots)
- Matte black (modern, shows water spots)
- Polished brass/gold (luxury, trending)
The Installation Process
Before We Start
- Consultation — Fain visits your home, measures the space, discusses your vision
- Quote — You receive a detailed written quote with line-by-line pricing
- Material selection — You choose tile, fixtures, and glass (we help guide this)
- Scheduling — We wait until ALL materials arrive before starting
During Installation
Day 1: Demo
- Remove existing tub/shower
- Open walls to studs
- Inspect for water damage or mold (fix if found)
- Rough plumbing modifications
Day 2: Prep
- Install new shower pan (mortar bed or prefab)
- Waterproof walls and floor with membrane
- Install cement board on walls
- Flood-test the pan (fill with water, check for leaks)
Day 3-4: Tile
- Install wall tile from bottom up
- Cut around niches, fixtures, and corners
- Install floor tile with proper slope to drain
Day 5: Finish
- Grout all tile
- Install fixtures (showerhead, valve trim, drain cover)
- Seal grout
Day 6: Glass + Final
- Install glass enclosure
- Caulk all joints
- Final inspection and cleanup
- Walk-through with homeowner
After Installation
- Wait 24 hours before using (grout and caulk need to cure)
- Seal grout after 2 weeks (we provide sealant)
- Clean glass weekly to prevent hard water buildup
Common Walk-in Shower Mistakes
1. Inadequate Waterproofing
The #1 cause of shower failure. Every surface behind the tile must be waterproofed — not just "water-resistant." We use Schluter Kerdi membrane or equivalent on every project. This is non-negotiable.
2. Improper Slope
The shower floor must slope toward the drain at 1/4" per foot. Too little slope = standing water. Too much = uncomfortable footing. This requires a custom mortar bed — prefab pans handle this automatically.
3. Wrong Tile for the Floor
Floor tile must have a slip-resistant rating (DCOF ≥ 0.42). Large smooth tiles on a shower floor are a safety hazard. We always verify slip ratings before installation.
4. Insufficient Niche Planning
Niches (built-in shelves) must be planned before tile goes up — they're built into the wall structure. Adding one after the fact means ripping out tile. We recommend at least one niche per shower user.
5. Cheap Glass
Thin glass (3/8") flexes and feels flimsy. We use 3/8" minimum for framed enclosures and 1/2" for frameless. The glass is the most visible element — don't cheap out here.
Walk-in Shower Accessibility Options
Walk-in showers are inherently more accessible than tubs. For homeowners planning for aging-in-place or mobility needs:
Curbless Entry
- Zero threshold — wheelchair and walker accessible
- Requires careful floor slope engineering
- Adds $500-$1,500 to the project
Built-in Bench
- Fold-down or fixed tile bench
- Supports seated showering
- Adds $400-$800
Grab Bars
- Installed into blocking behind tile (must be planned before tiling)
- Available in matching fixture finishes (not just hospital chrome)
- Adds $150-$400 per bar
Handheld Showerhead on Slide Bar
- Adjustable height for seated or standing use
- Standard inclusion in most of our projects
Frequently Asked Questions
How long does a walk-in shower installation take?
2-4 days for composite panels. 5-6 days for standard tile. 7-10 days for complex custom tile work. We don't rush — but we don't waste time either.
Can I keep my bathtub and add a walk-in shower?
If you have space for a separate shower (typically 36"x36" minimum), yes. If you're converting the tub space into a shower, the tub goes. Most homeowners in homes with 2+ bathrooms keep one tub for resale value.
Do I need a permit for a shower remodel?
In most cases, no — cosmetic remodels (tile, fixtures, glass) don't require permits. If we're moving plumbing or making structural changes, permits may be required. We handle this if needed.
Will a walk-in shower increase my home value?
Yes. According to the National Association of Realtors, bathroom remodels return 50-70% of their cost at resale — higher for cosmetic refreshes, lower for full gut renovations. Walk-in showers specifically appeal to buyers because they signal "updated" and "accessible."
What if you find mold or water damage during demo?
We fix it. This is actually one of the most important reasons to hire a professional — hidden water damage behind old tile is extremely common. We address it properly before building the new shower on top.
Can I supply my own tile and fixtures?
Yes. Buy your materials anywhere — tile showrooms, Floor & Decor, online retailers. We install whatever you choose with no markup on customer-supplied materials.
Why Homeowners Choose Us
We're not a franchise that sends a different crew every day. Fain — 38 years in the trade, zero claims against his bond — personally builds every shower.
- We only take 1-2 projects at a time — your job gets full attention
- We work with any materials you choose — no locked-in suppliers
- Detailed written quotes — line-by-line, no surprises
- Licensed, bonded, insured — WA State contractor license
Get Started
Use our free shower estimator to get a price range in 60 seconds. Or call Fain directly at (855) 797-4321.
We serve King County, Snohomish County, and Skagit County — including Snohomish, Everett, Marysville, Lake Stevens, Bothell, Kirkland, Bellevue, and surrounding areas.