Bathtub installation cost in Seattle typically lands between $1,500 and $8,000 including the tub, based on 2026 cost data — with most straightforward tub-for-tub swaps coming in around $2,000 to $4,500. The spread is wide because the tub itself runs anywhere from $300 for a basic alcove model to several thousand for cast iron or freestanding styles. Everything here is an estimate; your bathroom and tub choice set the real number.
We remodel bathrooms across Seattle, King County, and Snohomish County, and tub replacements are steady work for us — usually a cracked fiberglass tub, a stained 40-year-old cast iron unit, or a homeowner who wants a real soaking tub back after years of a cramped one. Here’s what the job costs and where the money goes.
Bathtub Replacement Cost Breakdown (2026 Estimates)
| Item | Estimated cost |
|---|---|
| New tub | $300 – $3,000+ |
| Installation labor | $400 – $2,000 |
| Old tub removal & disposal | $150 – $750 |
| Plumbing modifications | $200 – $700+ |
| New faucet / valve | $200 – $600 |
| Wall repairs (if needed) | $200 – $700 |
| Permits (if required) | $50 – $250 |
Estimates compiled from 2026 national cost guides (HomeGuide; Angi, updated July 2026 — national average $5,917, typical range $2,100–$9,738). Seattle labor runs at the higher end of national ranges.
Cost by Tub Type
Standard alcove tub — roughly $1,500–$2,000 installed (estimate). The three-wall tub most Seattle homes already have. Cheapest to swap because the plumbing stays put.
Tub-shower combo — about $2,000–$4,500 installed. Add a new surround ($500–$2,000) if the old walls come out with the tub — and in our experience they usually should.
Freestanding or clawfoot — around $2,200–$5,000 installed. Beautiful in the right bathroom; we covered the install process in our freestanding tub guide.
Jetted / whirlpool — roughly $3,000–$8,000. Needs dedicated electrical (GFCI), which adds an electrician to the job.
Walk-in tub — about $3,000–$15,000. The unit itself is most of that; worth it for aging-in-place plans.
What Drives the Price in Seattle
The old tub. A lot of Seattle housing stock — Ballard, West Seattle, Wedgwood — still has the original cast iron tub. They weigh 300+ pounds, they don’t go quietly, and sometimes they have to be broken up in place. Removal and disposal of a heavy tub costs noticeably more than pulling a fiberglass unit (estimates: $150 for light tubs, $300+ for cast iron haul-away, per 2026 guides).
What’s behind the walls. The tub is the one fixture that hides its problems. Once it’s out, we regularly find slow-leak damage to the subfloor or studs. Minor repairs run $200–$700 (estimate); real rot costs more. This is the main reason quotes carry a contingency — nobody can see behind your tub surround until it’s open.
Plumbing changes. Keeping the drain and valve where they are is the single biggest money-saver. Moving lines for a different tub configuration adds roughly $400–$1,900 (estimate).
Subfloor reinforcement. Heavy tubs — cast iron, stone, big soakers full of water — can need $300–$800 of framing reinforcement (estimate). We check joist condition before quoting, not after.
Do You Need a Permit in Seattle?
A like-for-like tub swap with no plumbing changes is largely cosmetic work. Once supply or drain lines are altered or fixtures move, a plumbing permit comes into play — and jetted tubs bring an electrical permit with them. Permit costs are modest (roughly $50–$250, estimate); we handle permitting on our projects, so this lands on our side of the table, not yours.
Replace the Tub, or Rethink the Bathroom?
Three honest questions we walk homeowners through:
Refinish instead? If the tub is structurally sound and just ugly, reglazing costs a few hundred dollars (2026 estimates: $330–$630). It’s temporary — a few years, not decades — but it’s the budget move.
Convert to a shower instead? If nobody has taken a bath in years, a conversion often serves the household better. Costs and trade-offs are in our tub-to-shower conversion cost guide — just keep one tub in the house for resale.
Full bathroom remodel? If the vanity, tile, and tub are all from the same decade, replacing them together costs less than doing each one separately over three years. Start with our bathroom remodel cost guide and our vanity replacement guide.
Worth noting: national Realtor data puts cost recovery on bathroom renovations around 71% — and a clean, current bathroom is one of the first things Seattle buyers look at.
How Long Does It Take?
A straight swap takes 1 to 3 days: day one is demo and any surprise repairs, day two is set and plumb, day three is surround and finish work. Tile surrounds, moved plumbing, or discovered rot extend that.
Frequently Asked Questions
How much does it cost to install a bathtub in Seattle?
Most Seattle bathtub installations run $1,500–$8,000 including the tub, per 2026 cost data — with simple alcove swaps around $2,000–$4,500 installed. Tub choice and what’s found behind the walls drive the final number. These are estimates.
How much does it cost to replace a bathtub without remodeling the bathroom?
A tub-for-tub swap keeping the same plumbing layout is the cheapest version of the job — roughly $2,000–$4,500 in 2026 estimates, covering the tub, labor, removal, and a basic surround. No tile work, no moved fixtures.
Is it cheaper to refinish or replace a bathtub?
Refinishing costs a few hundred dollars ($330–$630, 2026 estimates) versus thousands for replacement — but it’s a surface fix that lasts a few years. Cracked, leaking, or rusted-through tubs need replacement.
Do I need a permit to replace a bathtub in Seattle?
Not for a true like-for-like swap with no plumbing changes. Altering supply or drain lines, relocating the tub, or adding a jetted tub’s electrical triggers permits. We handle permits on our jobs.
How long does a bathtub last?
Acrylic and fiberglass tubs last roughly 10–15 years; enameled steel and cast iron much longer. If your tub is leaking into the floor below, that’s past the point of patching — water damage costs more than the tub.
Get a Real Number for Your Bathroom
We’ll look at your tub, tell you whether replacement, refinishing, or a conversion makes the most sense, and give you a firm written quote. BB-Builders Pro is a licensed and insured general contractor serving Seattle, King County, and Snohomish County. Call 206-851-4233 or request your free estimate.
