- Origin program
- Seattle, King County, Washington, USA
- Source
- CAST Architecture plan page
- Last checked
- Aug 11, 2026
- Additional notes
- The program page also describes a larger two-bedroom option; the scalar records the 467-square-foot base design.
Plan record
Cedar Cottage
Cedar Cottage is a pre-approved detached ADU plan from CAST Architecture. The public source lists it as 467 sq ft, 1 bed, and 1 bath. It originated in the Seattle, King County, Washington, USA program. This directory currently shows acceptance in Seattle, King County, Washington, USA. Source context comes from City of Seattle, last checked Aug 11, 2026. Use the linked provider, location, and source records to verify current acceptance before relying on the plan.
Source-backed summary
What public sources list
Cedar Cottage is a pre-approved detached ADU plan from CAST Architecture. The public source lists it as 467 sq ft, 1 bed, and 1 bath. It originated in the Seattle, King County, Washington, USA program. This directory currently shows acceptance in Seattle, King County, Washington, USA. Source context comes from City of Seattle, last checked Aug 11, 2026. Use the linked provider, location, and source records to verify current acceptance before relying on the plan.
- Provider record
- CAST Architecture
- Origin program
- Seattle, King County, Washington, USA
- Accepted location pages
Details
Plan facts
- Plan identifier
- Not listed in source
- Provider
- CAST Architecture
- Origin location
- Seattle, King County, Washington, USA
- Accepted locations
-
- Seattle, King County, Washington, USA (Accepted)
- Status
- Pre-approved
- Size
- 467 sq ft
- Bedrooms
- 1 bed
- Bathrooms
- 1 bath
- ADU type
- Detached
- Construction type
- Not listed in source
- Plan fee
- $1,000
- Estimated cost
- Not listed in source
- Last checked
- Aug 11, 2026
Plan notes
Notes
- Foundation notes
- Not listed in source
- Utility notes
- Not listed in source
- Energy notes
- Not listed in source
- Accessibility notes
- Not listed in source
- Permit fee notes
- Not listed in source
- Cost notes
- Not listed in source
- Additional notes
- The program page also describes a larger two-bedroom option; the scalar records the 467-square-foot base design.
Source and evidence
CAST Architecture plan page
- Publisher
- City of Seattle
- Source type
- Plan catalog
- Reliability
- Official city/county/state government source (5/5)
- Last checked
- Aug 11, 2026
- Accessed
- Aug 11, 2026
Accepted-in locations
Accepted Locations
1 accepted location