Basic
$284 – $548 per project
Tank pumped out through the access lid, sludge and scum removed, waste hauled to a licensed disposal site
How Much Does Clean Septic Tank Cost in Seattle, Washington?
Pump out and clean a standard residential septic tank (about 1,000 gallons), including disposal.
Clean Septic Tank in Seattle, Washington typically costs $334 to $645 per project as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Clean Septic Tank in Seattle, Washington
$334 – $645
per projectPrices in Seattle are 19.0% higher than the national average for clean septic tank.
National average: $292 – $564 per project
What you get at each price level
Standard
$334 – $645 per project
Tank pumped with solids broken up and back-flushed, inlet and outlet baffles checked, sludge levels noted, licensed disposal
Premium
$418 – $807 per project
Tank pumped and back-flushed until clear, baffles checked, outlet effluent filter cleaned if fitted, condition photos, licensed disposal
Cost Breakdown in Seattle
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $137 – $263 | job |
| Labor | labor | $137 – $262 | job |
| Supplies & Other | supplies | $38 – $72 | job |
| Equipment & Disposal | equipment | $23 – $48 | job |
Prices adjusted for Seattle local market conditions.
Cost Factors in Seattle, Washington
What Affects Pricing
- Materials ($131.40-$253.22 per project)
- Labor ($102.20-$195.67 per project)
- Supplies & Other ($36.50-$69.06 per project)
- Equipment & Disposal ($21.90-$46.04 per project)
Local Price Adjustments
Material costs4.0% above avg
Labor costs34.0% above avg
Labor costs in Seattle run proportionally higher than materials, which may favor material-heavy solutions.
Frequently Asked Questions
References
- Septic & Well Pro: Septic Tank Pumping Cost 2026, septicandwell.com, retrieved Nov 2026
- Construction wages by metro and rural area, used for the labor adjustment by ZIP code, U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025
- Regional price parities for goods, used for the materials adjustment by ZIP code, U.S. Bureau of Economic Analysis, 2024
Get Free Estimates in Seattle
Connect with local clean septic tank contractors in Seattle for personalized quotes based on your specific project.