Basement Waterproofing Cost in Washington
$2,800 – $17,800We estimate basement waterproofing in Washington at $2,800 to $17,800 for interior drainage along part or all of a basement. The national estimate is $2,450 to $15,500. Washington carpenter pay is 22% above the national median, ranking 5 of 51.
| Part of the job | Low | High |
|---|---|---|
| Parts and materials (our assumption) | $1,000 | $5,000 |
| Labor hours (our assumption) | 20 | 80 |
| Billed labor rate per hour | $89 | $161 |
| Estimated total | $2,800 | $17,800 |
Our estimate, not a quote. Billed rate is the Washington median wage from BLS (2025, $35.67 an hour) times 2.5 to 4.5 to cover payroll costs, overhead, travel and profit. How we estimate
What other publishers report
| Publisher | Low | High | Scope |
|---|---|---|---|
| This Old House | $12,447 | $14,833 | 1,000 square foot basement. Page dated March 2026. |
| Bob Vila | $2,300 | $7,575 | Overall, citing Angi. Page dated June 2024. |
| Fixr | $3,000 | $10,000 | Overall. Page dated February 2026. |
Cities in Washington
| Metro area | Median wage | Low | High |
|---|---|---|---|
| Seattle | $36.74 | $2,850 | $18,200 |
Who can legally do this in Washington
Washington requires all construction contractors to register with the Department of Labor & Industries.
Compared with neighboring states
Other carpenter jobs in Washington
Basement Waterproofing cost in every state · Washington home repair guide
Sources
General information, not professional advice. Conditions, codes and prices vary. Turn off power, gas or water before any work, and hire a licensed professional when in doubt. Cost figures are our estimates, not quotes.