Hillside Stabilization In Greater Seattle

Protect your property with permanent slope stabilization solutions.

What Is Hillside Sloping?

Hillside sloping, also known as soil creep or slope movement, is the gradual shifting or downward sliding of soil and rock on a sloped landscape. While it may start subtly, over time it can lead to serious structural issues—cracked foundations, unstable retaining walls, and even the collapse of entire sections of hillside. Rain, erosion, poor drainage, and gravity all contribute to this movement, making properties built on or near slopes especially vulnerable.

Left unaddressed, hillside sloping poses safety risks, reduces property value, and can lead to costly damage. It’s not just an eyesore—it’s a warning sign of deeper instability beneath the surface.

How Sejant Northwest Solves It—Permanently

At Sejant Northwest, we specialize in hillside stabilization solutions engineered for long-term peace of mind. Our team uses a combination of soil nail walls, helical anchors, shotcrete facing, and advanced drainage systems to reinforce the slope and eliminate movement at its source. Each project is custom-engineered to the specific conditions of the site, ensuring maximum strength and stability.

Unlike temporary fixes, our stabilization methods are designed to be permanent. We don’t just patch symptoms—we resolve the underlying problem. Backed by years of geotechnical experience and precision construction, Sejant Northwest delivers slope stabilization solutions that protect your investment and restore your confidence in the ground beneath your feet.

Our hillside stabilization process is designed to stop slope movement at its source—permanently. From thorough site assessment to engineered solutions and precision installation, we handle every step with expertise and care. By anchoring your hillside to stable ground and reinforcing the surface with a shotcrete wall, we protect your property, restore peace of mind, and ensure long-term stability for years to come

Step 1: Assessment

“Our first step is to schedule an on-site assessment. We take the time to walk the property with you, listen to your concerns, and look closely at signs of slope movement—like soil cracks, drainage issues, or leaning structures. This helps us understand the current conditions and identify the root causes before we recommend a solution.”

Step 2: Present Findings

“After the site visit, we walk you through our findings in plain language so you understand exactly what’s happening on your property. We explain the root causes of the slope instability, discuss the potential risks, and present tailored solutions for remediation. From there, we outline the next steps—whether that’s engineering design, permitting, or scheduling the work—so you know what to expect moving forward.”

Step 3: GeoTech and Structural Enginner

Next, we collaborate with our trusted geotechnical and structural engineers to develop a site-specific stabilization plan. They analyze soil conditions, slope angle, and the direction and severity of movement to determine the most effective approach. Based on their calculations, we receive precise recommendations on how many piles or anchors are needed, where they should be placed, and how deep they should go to permanently stabilize your hillside.”

Step 4: Permitting 

Once we receive the engineered drawings, we begin the permitting process. Any hillside stabilization work requires a permit, and we make it a priority to apply as early as possible to avoid delays. We handle the paperwork, ensure the design complies with local building codes, and work directly with the municipality on your behalf. If homeowner involvement is needed at any point, we guide you through the process to make it as simple and stress-free as possible.

Step 5: Drive Piles

“With permits approved, we move into construction. Following the engineered plans and geotechnical reports, our crew installs helical piles or pin piles—steel rods designed to anchor your hillside to stable ground. Each pile is driven deep into the earth until it reaches refusal—the point where it can no longer be advanced, indicating it has hit solid, load-bearing soil. This ensures a secure, permanent foundation that resists further movement.”

Step 6: Shotcrete Wall

The final step is to install a shotcrete wall—a reinforced concrete facing that holds the surface soil in place and prevents future erosion. Once this wall is in place, your hillside is permanently stabilized. Barring a major natural disaster, you won’t see any further movement