Basic
$973 – $2,920 each
Single-tank 32,000-grain softener with timer-based control head, brine tank, bypass valve and air-gapped drain line

Photo: Muselsom · CC BY-SA 4.0 · Source
Supply and install one whole-house water softener (unit and plumbing labor); complex/whole-home RO or dual-tank systems run higher.
Water Softener in Seattle, Washington typically costs $1,145 to $3,435 each as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Prices in Seattle are 19.0% higher than the national average for water softener.
National average: $1,000 – $3,000 each
$973 – $2,920 each
Single-tank 32,000-grain softener with timer-based control head, brine tank, bypass valve and air-gapped drain line
$1,145 – $3,435 each
Single-tank 40,000-grain softener with demand-metered control head, brine tank, bypass valve and air-gapped drain
$1,431 – $4,294 each
Single-tank 48,000-grain high-efficiency metered softener with fine-mesh resin, sediment pre-filter, bypass loop
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $468 – $1,404 | each |
| Labor | labor | $469 – $1,407 | each |
| Supplies & Other | supplies | $125 – $374 | each |
| Equipment & Disposal | equipment | $83 – $250 | each |
Finished water filter and softener installation with copper piping in a basement
Photo: William Herron · CC BY-SA 2.0 · Source
Find a pro to do thisWater softener brine tank filled with salt pellets
Photo: Muselsom · CC BY-SA 4.0 · Source
Find a pro to do thisLabor costs in Seattle run proportionally higher than materials, which may favor material-heavy solutions.
Connect with local water softener contractors in Seattle for personalized quotes based on your specific project.