Independent and unbiased 2026 pricing data
HouseProjectCalc

Seattle, WA

French Drain Cost in Seattle

Estimated french drain cost in Seattle

$2,300–$6,950

Roughly about 32% above the national average.

High labor rates and wet-climate detailing raise costs.

Estimate your cost

Based on Seattle, WA pricing.

Estimated cost range

$2,300–$6,950

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An estimate for planning, not a quote. Get written quotes from local pros below.

Estimate, not a quote. Local prices vary by contractor and project. These are 2026 estimates for Seattle, WA. Get written quotes from licensed Seattle contractors before you budget.

Quote too high? DIY your french drain

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212 Main Perforated Flexible Drain Pipe, 4" x 25'
212 Main 212 Main Perforated Flexible Drain Pipe, 4" x 25'

$48.85

Corrugated perforated pipe to carry water away from the foundation.

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LAVEVE Landscape Fabric Weed Barrier, 4x100
LAVEVE LAVEVE Landscape Fabric Weed Barrier, 4x100

$29.99

Heavy 3.2oz fabric to wrap the gravel and keep silt out of the pipe.

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MIGHTY109 Grey Pea Gravel, 40 lb
MIGHTY109 MIGHTY109 Grey Pea Gravel, 40 lb

$59.99

Washed drainage rock to bed and backfill the trench.

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NDS 12" Square Catch Basin Drain Kit
NDS NDS 12" Square Catch Basin Drain Kit

$69.75

Catch basin with grate and adapters for surface water collection.

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What to know about french drain in Seattle

Soil movement around Seattle is usually modest, but local soil type still drives the right approach.

What affects french drain cost in Seattle

Beyond the local market, the same factors that drive french drain cost everywhere apply in Seattle:

  • Length and depth of the drain.
  • Type: yard, interior basement, or exterior foundation.
  • Soil conditions and digging difficulty.
  • Landscaping or concrete to remove and restore.

French Drain cost by drain type in Seattle

These figures are adjusted for Seattle pricing (about 1.32x the national average), so they reflect what local homeowners actually pay.

Estimated french drain cost by drain type in Seattle (2026)
Drain type Cost in Seattle Typical total
Surface / yard drain $23.10 to $69.30 /ft About $2,300 to $6,950
Footing / interior basement $46.20 to $139 /ft About $4,600 to $13,900
Exterior foundation $52.80 to $158 /ft About $5,300 to $15,800

French Drain cost in Seattle vs other metros

How a french drain in Seattle compares with nearby and similar-cost metros, using 2026 local estimates.

Metro Estimated french drain cost vs national
Seattle, WA $2,300–$6,950 about 32% above the national average
Spokane, WA $1,850–$5,550 about 6% above the national average
Tacoma, WA $2,050–$6,200 about 18% above the national average
San Diego, CA $2,300–$6,850 about 30% above the national average
Boston, MA $2,300–$6,850 about 30% above the national average
Washington, DC $2,250–$6,700 about 28% above the national average

Frequently asked questions

How much does french drain cost in Seattle?

In Seattle, WA, french drain typically costs $2,300 to $6,950 in 2026 for a standard project, about 32% above the national average. Your exact price depends on size, materials, and scope.

Why does french drain cost more or less in Seattle?

High labor rates and wet-climate detailing raise costs. Labor rates, permit costs, and local demand are the main reasons Seattle prices differ from the national average.

Do I need a permit for french drain in Seattle?

Most french drain projects require a permit. Requirements vary by city and Washington jurisdiction, so confirm with your local building department. A licensed contractor usually pulls the permit for you.

When is the best time of year for french drain in Seattle?

In Seattle, the mild climate means most projects can run year-round, with only the occasional rainy stretch to plan around.

Is french drain cheaper outside Seattle?

Sometimes. Seattle runs about 32% above the national average. Nearby smaller towns with lower labor costs can come in cheaper, while denser urban areas often cost more. Always compare quotes from contractors who serve your specific area.

French Drain cost in other cities

See the national French Drain cost guide