How much does it cost to repipe a house?

Repiping an entire home typically runs $2,000–$15,000, with most homeowners spending around $7,500. By square footage, that works out to roughly $1–$8 per sq ft — PEX pipe lands at the low end, copper at the high end, with the number of fixtures and how hard the pipes are to reach moving it in between.

PEX vs. copper — which costs less to repipe with?

PEX costs meaningfully less than copper, both for the pipe itself (roughly $0.40–$2 per linear foot vs. $2–$8 for copper) and for labor, since it's flexible enough to snake through existing walls without opening them up as much. Copper lasts longer and resists bacteria and UV better, but most residential repipes today use PEX because the price gap is significant on a whole-house job.

Why is labor most of the repiping cost, not the pipe itself?

Labor typically runs about 70% of a repiping bill. The material — a few hundred to a couple thousand dollars in pipe — is a small piece next to the time it takes to access pipes behind walls, under floors, or in a slab, run the new lines, pressure-test the system, and patch up whatever had to be opened.

Do I need a permit to repipe a house?

In most areas, yes — a whole-house repipe changes plumbing that inspectors need to verify, and permits typically run $50–$500 depending on your city. A licensed plumber usually pulls the permit as part of the job and schedules the required inspection.

How do I know if my house needs to be repiped?

Watch for discolored or rusty water, a noticeable drop in water pressure, recurring leaks you keep patching, or pipe older than 50 years — especially galvanized steel, lead, or polybutylene, none of which are considered safe or worth repairing long-term. A plumber can inspect the accessible pipe to confirm before you commit to a full repipe.

Whole-house repipe cost in Seattle

Whole-house repipe in Seattle costs about $2,400 to $17,700 (typically $8,900) — local prices run about 18% above the national average.

These figures adjust our national whole-house repipe range to Seattle's local cost level — see the method and sources below.

Low

$2,400

Typical

$8,900

High

$17,700

About $1.18 – $9.44 per sq ft of home, installed

How we localized this

We start from our national whole-house repipe range of $2,000–$15,000 and adjust it for Seattle, where costs run about 18% above the national average. Seattle is one of the more expensive U.S. metros for home-improvement work. A cost-index comparison frames Seattle renovation pricing as about 28% above the national average, while the multiplier it actually applies to project estimates is 20% above; other local remodeling guides put the range as high as 25–50% above, largely citing tech-sector wage competition for skilled trades. Mortenson's quarterly index shows Seattle's recent cost growth running below the national pace, which points to a market absorbing pressure rather than one still accelerating — but the underlying level remains high. We apply about 18% above national, close to the more conservative of the cited multipliers. Materials are priced roughly nationally, so treat this as an approximation — your actual price depends on your home, contractor, and project specifics.

Seattle cost sources (2)

Seattle Home Improvement Costs (2026) — Cost to Renovate
Construction Cost Index for Seattle — Mortenson

Tech-sector wage competition pulls up pay for skilled trades across the metro, and strong, steady demand leaves many contractors with little scheduling downtime. The Seattle Department of Construction and Inspections (SDCI) processes permits online, but timelines vary widely — simple permits often clear in 2–4 weeks, while structural work or an accessory dwelling unit (ADU) can take 3–6 months. Seattle's wet climate makes roofing and decking material choices matter more than in drier regions; composite decking and metal roofing cost more upfront but hold up better against sustained rainfall than wood or standard asphalt. ADU construction is especially active here, driven by the region's housing shortage and comparatively permissive local rules.

Estimate your Seattle whole-house repipe

Estimate by home size, pipe material, and access. The estimate starts from our published per-square-foot range.

Your area

Adjusts the estimate to local cost levels. Pick a metro or leave on national.

Home size: 2,000 sq ft

Pipe material

Pipe accessibility

Pipes under a slab or behind finished walls take far longer to reach than an open crawlspace or basement.

Additional work

Estimated cost for your options in Seattle

$2,400 – $18,900

Typical: $8,900

Adjusted for Seattle — costs there run about 18% above the national average.

How we got this

Starts from our published whole-house repipe range (per sq ft × 2,000), adjusted for:

Pipe material: PEX (most common today)×1
Pipe accessibility: Open access (crawlspace/basement)×1
Additional work: Repipe only×1
Area: Seattle×1.18

These figures are planning estimates compiled from public cost data on the dates shown — not quotes, bids, or guarantees. Real prices vary widely with your home, location, materials, permits, and contractor. Always get itemized written quotes from licensed local pros before budgeting or hiring.

What changes the price

Home size — Raises cost
More square footage means more fixtures and longer pipe runs — repiping is priced mainly by the size of the home.
Pipe material — Varies
PEX is the least expensive and most common choice today; CPVC costs a bit more, and copper runs several times more for the same job.
Accessibility — Raises cost
Pipes reachable through a crawlspace or basement are far cheaper to replace than pipes under a concrete slab, behind finished walls, or on upper floors.
Number of fixtures — Raises cost
Each sink, toilet, shower, and appliance connection adds its own run and labor time.
Drywall & wall repair — Raises cost
Opening walls or floors to reach old pipes means patching them afterward, often billed separately from the plumbing work itself.
Permits & inspection — Raises cost
Most jurisdictions require a permit and inspection for a whole-house repipe, built into a licensed plumber's quote.

Get real quotes for your Seattle whole-house repipe

Our ranges are for planning. The only way to know your real price is itemized quotes from licensed local pros — always get at least three before you hire.

Tip: search for licensed, insured Seattle whole-house repipe contractors in your area, check reviews and references, and compare written itemized bids — not just bottom-line numbers.

Whole-house repipe cost — FAQ

How much does it cost to repipe a house?: Repiping an entire home typically runs $2,000–$15,000, with most homeowners spending around $7,500. By square footage, that works out to roughly $1–$8 per sq ft — PEX pipe lands at the low end, copper at the high end, with the number of fixtures and how hard the pipes are to reach moving it in between.
PEX vs. copper — which costs less to repipe with?: PEX costs meaningfully less than copper, both for the pipe itself (roughly $0.40–$2 per linear foot vs. $2–$8 for copper) and for labor, since it's flexible enough to snake through existing walls without opening them up as much. Copper lasts longer and resists bacteria and UV better, but most residential repipes today use PEX because the price gap is significant on a whole-house job.
Why is labor most of the repiping cost, not the pipe itself?: Labor typically runs about 70% of a repiping bill. The material — a few hundred to a couple thousand dollars in pipe — is a small piece next to the time it takes to access pipes behind walls, under floors, or in a slab, run the new lines, pressure-test the system, and patch up whatever had to be opened.
Do I need a permit to repipe a house?: In most areas, yes — a whole-house repipe changes plumbing that inspectors need to verify, and permits typically run $50–$500 depending on your city. A licensed plumber usually pulls the permit as part of the job and schedules the required inspection.
How do I know if my house needs to be repiped?: Watch for discolored or rusty water, a noticeable drop in water pressure, recurring leaks you keep patching, or pipe older than 50 years — especially galvanized steel, lead, or polybutylene, none of which are considered safe or worth repairing long-term. A plumber can inspect the accessible pipe to confirm before you commit to a full repipe.

Cost data compiled July 26, 2026.

Sources (3)

How Much Does It Cost to Repipe a House? [2026 Data] — Angi
How Much Does It Cost to Install or Replace Plumbing? (2026) — HomeGuide
How Much Does It Cost to Repipe a House in 2025? — HomeAdvisor

National range and per-sq-ft unit synthesize Angi, HomeGuide, and HomeAdvisor into one low–typical–high band rather than reproducing any single source's table. HomeAdvisor's own headline 'Normal Range' widget on this article ($372–$2,119, avg $1,246) directly contradicts its own per-square-foot body table on the same page (~$4.50/sq ft, i.e. $9,000+ for a 2,000 sq ft home) — read as a template/data mismatch on their end and NOT used; their per-square-foot table was used instead. Labor (~70% of the bill per both Angi and HomeAdvisor) is the dominant cost driver, not the pipe material. Metro-level breakdowns are coming as we verify local data.

Compare other locations

See all Seattle plumbing costs on the Seattle plumbing page.

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