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How Much Does Yard Drainage Cost in Seattle, WA? [2026 Data]
Lawn irrigation costs depend on your project and location. Check with a local pro for your specific job.
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Cost Insights
Installing a new yard drainage system in Seattle, WA, costs $3,385 on average for most local homeowners.
Your final project price depends heavily on the specific system type, your yard size, and property accessibility.
You should also budget for common additional materials like catch basins, which cost $60 to $560 each.
Hiring a local yard drainage pro in Seattle, WA provides reliable help with your project and saves you time.
This article was created using automation technology and thoroughly fact-checked and edited by an Angi Editor in accordance with our AI policy.
Your yard drainage cost in Seattle, WA, runs $3,385 on average, but ranges from $1,934 to $4,889. The total price depends on the specific yard drainage system you choose, the slope of your property, and local labor rates. Before starting this project, understanding the cost helps you plan a budget that protects your lawn and home from water damage.
Yard Drainage Cost Factors
When you hire a drainage specialist in Seattle, WA, several key elements determine your final bill. The type of system you choose and the size of your property drive the overall price for this essential home improvement.
System Type
The specific drainage solution you install dictates the amount of digging, piping, and labor required for the project. In Seattle, WA, the rainy, overcast weather and mild wet winters demand effective water management to protect your property. Installing a French drain costs $25 to $60 per linear foot, making it a reliable choice for redirecting groundwater away from your foundation. If you need to manage surface water in low spots, adding a catch basin runs $60 to $225 per unit. You must also factor in sump pump installation costs to actively move water away from the home.
| System Type | Local Average Cost per Linear Foot | National Average Cost per Linear Foot | Local Average Cost | National Average Cost |
|---|---|---|---|---|
| French drain | $25–$60 | $20–$50 | $2,230–$7,780 | $2,000–$7,000 |
| Trench drain | $35–$80 | $30–$70 | $2,780–$8,890 | $2,500–$8,000 |
| Dry well | $335–$1,120 (per unit) | $300–$1,000 (per unit) | $1,120–$4,450 | $1,000–$4,000 |
| Catch basin | $60–$225 (per unit) | $50–$200 (per unit) | $670–$2,230 | $600–$2,000 |
| Swale | $10–$20 | $5–$15 | $890–$3,340 | $800–$3,000 |
| Surface drain | $15–$45 | $10–$40 | $1,340–$5,560 | $1,200–$5,000 |
Size
The total square footage of your property and the length of the required drainage lines directly impact your final price. Homeowners in Seattle, WA spend an average of $3,385 for a complete system to handle the area's constant drizzly conditions. Projects fall between $1,934 and $4,889, but outfitting a small yard under 500 square feet costs $890 to $2,230. Conversely, comprehensive systems for large properties over 2,000 square feet range from $5,560 to $13,400. Combining this project with routine lawn aeration helps improve soil permeability across your entire lot.
| Yard Size (Sq. Ft.) | Local Average Cost | National Average Cost |
|---|---|---|
| Small (under 500) | $890–$2,230 | $800–$2,000 |
| Medium (500–2,000) | $2,230–$5,560 | $2,000–$5,000 |
| Large (over 2,000) | $5,560–$13,400 | $5,000–$12,000 |
Materials
Upgrading to premium fabrics and durable pipes increases your upfront material expenses but extends the life of your system. Managing the heavy runoff in Seattle, WA requires reliable components like perforated pipe, which costs $5 to $10 per foot. You also need proper filtration to keep the system clear during wet winters, and drainage gravel runs $35 to $70 per ton. Keeping your roof runoff flowing smoothly with regular gutter cleaning prevents excess water from overwhelming these underground materials.
| Material Type | Local Cost per Unit | National Cost per Unit | Notes |
|---|---|---|---|
| Perforated pipe | $5–$10 per foot | $1–$5 per foot | Higher for longer runs |
| Gravel | $35–$70 per ton | $30–$60 per ton | Influences drainage effectiveness |
| Geotextile fabric | $0.15–$0.60 per sq. ft. | $0.15–$0.60 per sq. ft. | Premium fabrics cost more |
| Catch basin | $60–$560 each | $50–$500 each | Needed for low spots |
| Sump pump | $170–$670 each | $150–$600 each | Adds cost for powered drainage |
| Connectors/fittings | $5–$15 each | $2–$10 each | Required for complex systems |
Labor
Paying a skilled drainage specialist or landscaper ensures your system functions correctly and meets local building codes. In Seattle, WA, labor rates reflect the local cost of living and the expertise needed to navigate challenging terrain. Contractors charge higher rates for properties with steep slopes or rocky soil, especially since the region carries a risk of landslides. Professionals include their hourly or day rates within the total per-foot project estimate.
Prep
Preparing the land involves removing obstacles, leveling the ground, and ensuring safe digging near underground utility lines. The damp soil and dense tree roots common in Seattle, WA require extra equipment and effort to clear before trenching starts during the mild wet winters. Proper grading during this phase directs water naturally and reduces the need for extensive mechanical drainage. Addressing severe grading issues early helps you avoid a massive foundation repair cost down the road.
Tipping
Handing out a tip is never mandatory, but it serves as a great way to thank the installation crew for their heavy lifting. Workers in Seattle, WA dig trenches and haul gravel through drizzly, overcast weather. Providing a flat one-time tip of $20 to $50 per crew member shows your gratitude for their dedication. Offering hot coffee or snacks during the project also keeps the team energized.
Additional Cost Factors
Removing old pipes, restoring landscaping, and pulling permits add extra expenses to your final bill. In Seattle, WA, you must account for the cost of reseeding your lawn or replacing sod after the heavy equipment leaves. Integrating the new setup with existing hardscaping or retaining walls requires extra labor and materials to withstand the rainy climate.
Yard Drainage Pro Costs
Hiring a professional in Seattle, WA, ensures your system functions flawlessly. Local landscapers and drainage specialists charge $50 to $150 per hour for installation. Complex projects on steep slopes or rocky soil demand more time, increasing your total bill. When budgeting, remember to factor in the 10.55% local sales tax rate applied to materials and services in Seattle, WA. We recommend gathering multiple quotes to find the right expert for your yard.
Why You Should Hire a Yard Drainage Professional
Hiring a Seattle, WA, yard drainage pro protects your property from severe water damage, saving you days of heavy labor while adding long-term value to your home.
* Experts use specialized trenching equipment to install French drains efficiently and precisely.
* Contractors know how to navigate underground utility lines to prevent accidents during excavation.
* Professionals calculate the exact slope required to direct heavy runoff away from your foundation.
* A local expert secures the necessary permits and ensures the project meets regional building codes.
How Angi Gets Its Cost Data
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
Lawn irrigation services reviews from real Angi homeowners in Seattle, WA
4.1★ avg. • 103 total reviews
- Michael K.
Ed and Alex provided prompt and courteous service when I contacted them through Angi. My regular sprinkler service company put me in a queue and have yet to contact me with an appointment. I have switched my loyalty to Precision Hardscapes and Irrigation!!
PRECISION HARDSCAPES & IRRIGATION LLC - Ali A.
The team did a great job taming our overgrown lawn. I am really happy with the work they did and would hire them again as they were easy to work with and efficient.
DRLC General Contractor, LLC - Mohamed S.
This guys did lawn fencing and concrete, they did very good jobs i will recommend them.
Express Landscaping - Paul K.
Ceasar and his team thatched and raked our very large lawn. They did a great job at a reasonable price. Paul
Cesar Lawn Maintenance & Landscaping LLC - Ross L.
quick response and bid. came as planned. did the work better than expected. Moved a sprinkler head and tuned the others. lawn is green again!
Precision Waterscapes - Craig T.
They were fantastic, Iâ m so glad I hired them. Damaso explained everything clearly and was very patient with my questions. I didnâ t know much about our irrigation system because we just moved into a new house. He explained everything, made quick repair. Great service.
JRM Landscaping LLC - Francis M.
I was happy with the work they did. They took care of the lawn and even made recommendations of treatments that could be applied to take care of issues like moss and weeds. In one of the instances, they actually built a lawn from scratch
4 Seasons Landscape LLC - Wesley P.
Colton did an excellent job excavating a massive ditch for 100 feet of trees. He was a great communicator and solved problems along the way. He did the work exactly to spec and the irrigation system he designed and installed has kept my trees very happy. I hired him for another job doing some...
- Rachel K.
We decided our landscaping needing a total refresh and we hired Grassland-Synthetic Turf to build three large stone raised planter beds. Clay was my main point of contact and he was wonderful. After making the initial request for a quote, Clay came out quickly to give me an on-site estimate....
Grassland Synthetic Turf, LLC - Barbara S.
They’ve already been out once and did a great job. We’ve hired them for bi-weekly lawn care and look forward to working with them!
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