Cascadia Building Company LLC
ADU builder in Seattle, WA · Licensed
1completed ADU permits
1total ADU permits
2009year active on record
$332,555median est. project cost
Washington state license
- License
- CASCABC943L2
- Status
- Licensed
- Type
- CONSTRUCTION CONTRACTOR
- Expires
- 2028-02-04
- Registered in
- SEATTLE, WA
As reported by WA L&I on 2026-10-13. Always re-verify at lni.wa.gov/verify.
Permit record
Every ADU-related permit in covered city records naming this contractor. Links go to each city's official permit portal.
| Permit | City | Issued | Status | Est. cost | Address | Description |
|---|---|---|---|---|---|---|
| 6208280-CN | Seattle | 2009-07-24 | Completed | $332,555 | 9210 MARY AVE NW | Demolish existing Single Family Residence and construct new single family residence with accessory dwelling unit. |
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