Basement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost Seattle
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Basement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost Seattle
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Basement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost SeattleBasement Waterproofing Cost Seattle
Basement Waterproofing Cost in Seattle, WA
Detailed pricing guide with local market adjustments and material comparisons
Seattle Average
$2,600–$13,000
Market Tier
Major Metro
Cost Breakdown
Basement Waterproofing Cost in Seattle
Major MetroLowAverageHigh
$2,600$7,800$13,000
Market Tier
Major Metro (1.3x)
Major metropolitan area with high demand and cost of living
Material Cost Comparison
Interior drainage channel(Budget)
$1,950–$9,750Waterproofing membrane(Mid-Range)
$2,600–$13,000Sump pump and basin(Premium)
$3,640–$18,200Factors that affect your cost
- Interior vs exterior waterproofing
- Linear footage of affected walls
- Sump pump installation included
- French drain installation
- Foundation crack repair needed
- Exterior excavation required
- Dehumidifier addition
Get Quotes in Seattle
Seattle Housing Market
Median Home Price
$758,880
Homes for Sale
1,055
Price per Sq Ft
$596
Local Pros
560
Home Service Professionals Near Seattle
multimedia_specialist 90lender 79Flooring 75Inspectors 69Cleaners 65Painters 63Landscapers 60Roofers 59
Median Household Income
$121,984
Median Home Value
$912,100
Median Rent
$1,998/mo
Homeownership Rate
44.2%
Population
741,440
Median Year Built
1974
Source: U.S. Census Bureau, ACS 2023 5-Year Estimates
Track Your Costs
Renovation
Basement Waterproofing
Date
April 2026
Cost
$7,800
Vendor
Your local pro
Warranty
25-year material warranty
Seattle average: $2,600–$13,000
Before
Issue documented with photos
After
Repair completed, area sealed
Materials Used
Interior drainage channelWaterproofing membraneSump pump and basinHydraulic cement
Warranty Details
25-year material warranty
Auto-Checkup Created
"Basement Moisture Check" — every 12 months
Added by youApril 2026
Property Health Score
Good
88
foundation category +15 pts(73 → 88)
Documentation19/25
Maintenance20/25
Warranty22/25
Investment21/25
Your health score is calculated based on documentation completeness, maintenance currency, warranty coverage, and investment tracking.
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I found several contractors in your area. Here are the top results:
SM
Smith & Sons
Connectedcontractor
4.9(47)
BookQuote
JR
J&R Home Services
contractor
4.7(23)
From $95/hr
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Title:contractor
Category:contractor
Date:2026-04-07
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Cost FAQ
What is the average cost of basement waterproofing in Seattle?
The average cost of basement waterproofing in Seattle, WA ranges from $2,600 to $13,000. The final price depends on Interior vs exterior waterproofing, Linear footage of affected walls, Sump pump installation included.
What factors affect basement waterproofing cost?
Key factors include: Interior vs exterior waterproofing, Linear footage of affected walls, Sump pump installation included, French drain installation, Foundation crack repair needed, Exterior excavation required, Dehumidifier addition. In Seattle, local labor rates and material availability also influence pricing.
How do I get accurate quotes for basement waterproofing in Seattle?
Get at least 3 quotes from licensed professionals in Seattle. Use Fizbo SmartSearch to find and compare local contractors, read reviews, and request estimates — all in one place.