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Seattle permit evidence

Poured concrete cantilever walls

Selected Seattle concrete retaining-wall records and questions about structural design, forming, drainage, and finish scope.

What this work is and when it enters the conversation

A cast-in-place cantilever wall uses a reinforced stem and footing to resist retained soil loads. Excavation width, bearing material, reinforcement placement, concrete access, formwork, joints, waterproofing where relevant, and drainage behind the stem must work together. The finished face reveals only a small part of that assembly.

Public descriptions rarely provide a complete structural section. This evidence set therefore matches only records that explicitly combine concrete with retaining-wall language; it does not infer a cantilever system from generic wall wording. Open the permit link before treating the match as comparable experience.

  • An engineer selects reinforced concrete for the loads and geometry
  • The project can accommodate footing excavation and concrete placement
  • Architectural finish or a narrow exposed face is important
  • Durability, joints, and integration with stairs or structures drive the detail

Seattle permit and site questions

Engineered walls require current SDCI review and inspections defined by the approved documents.

Excavation, grading, surcharge, and environmentally critical area conditions can add review beyond the wall drawings.

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

3matching companies
3matching permits
3documented neighborhoods
2022–2023issue-year span

Among records with a positive declared cost, the observed range is $24,000 to $30,000. 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.

Stabuilt LLC1 matching record

Replace existing concrete retaining wall with keystone block wall accessory to existing single family residence per plan.

6957919-CN · Dec 13, 2023 · Phinney Ridge · $26,855

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.

  • Structural drawings, geotechnical assumptions, and delegated design boundaries
  • Reinforcement inspection, concrete testing, joints, and curing
  • Form finish, tie holes, caps, railings, and adjacent waterproofing
  • Drainage layer, pipe, outlets, backfill, and compaction sequence

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