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Downspout & Water Drainage Systems – Spokane, WA

Uncontrolled surface water can cause severe property damage—fast. Without proper drainage, water will always find the path of least resistance, often leading to foundation issues, soggy lawns, basement flooding, and erosion. At Landsite Development, we provide proven drainage solutions in Spokane, Spokane Valley, Liberty Lake, and the South Hill designed to redirect water safely and protect your property long-term.

With over 50 years of experience in the Inland Northwest, we understand the unique drainage challenges caused by sloped properties, rocky soils, and heavy spring runoff—especially in hilly areas like Spokane’s South Hill and neighborhoods near waterways such as the Spokane River and Little Spokane River.

Downspout Drainage Systems

Improper downspout drainage is one of the most common causes of foundation water damage in Spokane homes. When gutter downspouts release water too close to your house, water seeps back toward basements and crawl spaces—particularly in older neighborhoods like Manito, Lincoln Heights, and Five Mile Prairie.

We design and install underground downspout extensions that carry roof water safely away from structures using:

  • Buried downspout drain lines

  • Pop-up drainage emitters

  • Drain basins and catch basins

  • PVC or corrugated pipe systems

  • Downspout redirection to safe runoff zones

Every system is built to handle Spokane’s freeze–thaw cycles, heavy rain, and fast snowmelt.

French Drains & Subsurface Drainage

French drains are used to collect and redirect surface and groundwater before it enters your home or damages your yard. These are ideal for:

  • Water pooling near foundations.

  • Sloped yards (South Hill, Moran Prairie, Dishman Hills)

  • Lawns that stay wet after rain

  • Crawl space or basement moisture

  • Protecting retaining walls and patios

A French drain uses a perforated drain pipe surrounded by drain rock and filter fabric to collect water and move it to a safer discharge area on your property.

Why Choose Landsite Development?

  • Over 50 years solving drainage problems in Spokane

  • Drainage systems designed for clay soils and freeze–thaw winters

  • Permanent solutions—not temporary fixes

  • Professional-grade equipment and installation

  • Locally trusted, locally owned

Landsite_Development_AFTER_WaterDrainage

Dry Wells & Drain Basins

In many Spokane drainage problems, dry wells and drain basins are innovative and affordable solutions. These systems collect stormwater and disperse it slowly into the subsoil.

✅ Works great for homes near river bluff areas
✅ Stops downspout water from pooling
✅ Perfect for tight lot drainage in Spokane Valley and Mead
✅ Reduces erosion and runoff

Yard Grading & Slope Corrections

Sometimes drainage problems can be solved without pipes by reshaping ground levels to move water naturally. We use precision grading to create drainage flow that protects your foundation and prevents yard flooding.

This service is often performed with our Site Preparation equipment and is especially effective for:

  • Fixing the negative drainage slope toward your home

  • Repairing builder grading issues

  • Improving lawn or backyard runoff

  • Correcting hillside drainage on South Hill properties

Permeable Paver Drainage Systems

Permeable pavers allow water to flow through the surface instead of pooling. These systems are ideal for drainage problem areas and are also environmentally friendly.

Perfect for:

  • Driveways that slope toward garages

  • Patios in poorly drained yards

  • Areas near Liberty Lake or Little Spokane River

  • Parking pads with frequent runoff

Permeable pavers are installed using a layered drain rock base that filters and temporarily stores water before releasing it into the soil.

    Get a Drainage Evaluation

    If you’re dealing with standing water, erosion, or foundation moisture, drainage is not a problem to ignore. Let us diagnose the real issue and build the right solution.

    👉 Call (509) 448-1008 for a free drainage consultation in Spokane and surrounding areas.

    Our Work Speaks Volumes

    We’ve collaborated with an array of wonderful clients on the most rewarding (and award-winning) projects.

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