How Much Does French Drain Installation Cost in Seattle, WA?
Seattle pricing is 30% above the national average. Updated for 2026.
Based on local labor rates, oceanic climate conditions, and Seattle's tech-aerospace-trade economy.See our methodology
French Drain Installation Pricing in Seattle, WA
Seattle is a high-cost market where french drain installation runs about 30% above the national average. The city's tech-aerospace-trade economy supports higher wages, which translates to elevated contractor rates. With a population of 735K, competition among providers exists but demand keeps prices firm.
Local climate plays a direct role in french drain installation costs here. Persistent rain creates moisture management challenges for roofing, siding, and foundations; mild temperatures reduce HVAC extremes.
Market-specific factors matter in Seattle: tech economy drives premium pricing; green building requirements may add cost; high minimum wage affects labor rates.
Seattle has strict permitting requirements. Budget an additional 5-15% for permits, inspections, and code compliance when planning your french drain installation project. Licensed contractors familiar with local codes can navigate this process efficiently.
Seattle vs National Average
What Affects French Drain Installation Cost in Seattle?
Type
Interior: $40-$100/linear ft. Exterior: $60-$120/linear ft. Full perimeter: $5,000-$12,000
Additions
Sump pump: $500-$1,200. Drain tile: $20-$40/linear ft. Channel drain: $30-$75/linear ft
Seattle Market Conditions
tech economy drives premium pricing; green building requirements may add cost; high minimum wage affects labor rates
Local Climate Impact
persistent rain creates moisture management challenges for roofing, siding, and foundations; mild temperatures reduce HVAC extremes
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Tips to Save on French Drain Installation in Seattle
- 1.Interior French drains are cheaper ($40-$100/linear ft) than exterior ($60-$120/linear ft)
- 2.DIY is possible for simple exterior drains
- 3.Address grading issues first — sometimes regrading alone solves drainage
- 4.Bundle with waterproofing for better pricing
- 5.In Seattle, verify your contractor handles local permits — the permitting process here is more involved than average and DIY permit applications can cause delays.
📈 French Drain Installation in Seattle Cost Trends (2020–2024)
Prices have increased +17.8% over the last 5 years
| Year | National Avg | YoY Change |
|---|---|---|
| 2020 | $5,520 | — |
| 2021 | $5,752 | +4.2% |
| 2022 | $6,126 | +6.5% |
| 2023 | $6,298 | +2.8% |
| 2024 | $6,500 | +3.2% |
Based on national averages adjusted for annual inflation. Actual costs vary by location and project scope.
💬 What Did You Pay?
Real costs reported by homeowners for French Drain Installation in Seattle
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Frequently Asked Questions
Do French drains really work?
Yes. A properly installed French drain is one of the most effective solutions for redirecting groundwater. They typically last 30-40 years with minimal maintenance.
Why does french drain installation cost different in Seattle than other cities?
Seattle's costs reflect local labor rates driven by the tech-aerospace-trade economy, oceanic climate conditions that affect materials and scheduling, and strict permitting requirements. The expensive labor market also influences competitive pricing.
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