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Seattle permit evidence

Soldier pile / tieback walls

Seattle soldier-pile, lagging, anchor, and tieback wall permit evidence with questions for constrained slope sites.

What this work is and when it enters the conversation

Soldier-pile walls use spaced vertical structural members with lagging between them. Anchors or tiebacks may add resistance where cantilever action alone is not appropriate. The system can reduce the excavation width behind a wall, but drilling access, buried utilities, easements, corrosion protection, lagging details, and the location of anchors become central design constraints.

Companies are matched only when a selected permit mentions soldier piles, lagging, tiebacks, tie-rods, or soil anchors. The words show that a specialized system appeared in a past public record; they do not show which subcontractor performed each operation or certify the final installation.

  • Excavation room behind the proposed wall is tightly constrained
  • A failing wall needs a staged stabilization concept
  • Loads or retained height require a designed structural system
  • A geotechnical and structural team identifies piles or anchors as appropriate

Seattle permit and site questions

These walls are engineered work; confirm the required construction permit, special inspection, and geotechnical submittals with SDCI.

Anchors extending beyond a property line raise access and property-right questions separate from permit approval.

A permit exemption is not an engineering conclusion, and a mapped environmental layer is not a property assessment. Confirm the current path with SDCI for the actual address, dimensions, loads, grading, and proposed construction.

Calculated from selected records

What appears in this dataset

4matching companies
5matching permits
5documented neighborhoods
2022–2024issue-year span

Among records with a positive declared cost, the observed range is $24,000 to $300,000. These are permit declarations, not bids, invoices, final costs, or price guidance.

Companies with a matching permit description

The company list is evidence, not endorsement. Each excerpt below is the exact public description used for the match; open the official record to inspect its context.

Groundworks1 matching record

Construct alterations to install push piers helical anchors and tie-rods to support existing retaining wall and foundation of single-family residence per plan.

6953194-CN · Jul 3, 2024 · Fremont · $54,300

Open official Seattle record ↗

What to settle before signing

Comparable words in a permit do not make two properties comparable. Ask bidders to define exclusions and connect their proposed method to the site investigation and approved documents.

  • Design team roles and the assumptions in geotechnical recommendations
  • Pile installation method, vibration, spoils, utilities, and access
  • Anchor geometry, easements, testing, and corrosion protection
  • Inspection records and as-built documentation included at closeout

Re-open the contractor’s current Washington registration, bond, and insurance record before a decision. Confirm that the legal entity and license on the contract match the entity whose evidence you reviewed here.

Continue the research

Project intake

Describe the wall or slope question.

This independent intake is not routed to a particular profile company. Sending it does not create an endorsement or contractor relationship.

By sending, you agree to the privacy notice. For an immediate danger, leave the area and contact the appropriate emergency service.

Official sources

  1. Retaining Walls & RockeriesSeattle Department of Construction & Inspections
  2. Grading PermitSeattle Department of Construction & Inspections
  3. Environmentally Critical Areas CodeSeattle Department of Construction & Inspections