No. 33 - Cascadia Cottage Accessory Dwelling Unit

1 bedroom wheelchair accessible house plan, ADA compliant.

Designed by M Prochot & S. Dehner

 An Affordable Backyard Retirement Cottage

The Cascadia Cottage is a client designed backyard retirement accessory dwelling unit. This is a free downloadable PDF plan. 


  • Bedrooms: 1 
  • Bathrooms: 1
  • Floors: 1
  • Conditioned space: 560 sq. ft.
  • Overall dimensions:  20' x 28' with 6' x 12' covered porch
  • Foundation type: insulated slab
  • Print size: 24" x 36"
  • Immediate PDF download with license
  • Design criteria: International Residential Code; Seattle Residential Code; Washington State Energy Code.
  • Partially ADA compliant
  • A modifiable SketchUp Model is available for this plan.

Floor plan (click to enlarge)

For accurate cost estimating try BUILDING-COST.NET, a *FREE* online tool. Material costs can be obtained by visiting a local building supply center with your plans and requesting a free "take off" for your project.

Notes & features: Super-insulation capacity, full size eat-in kitchen, covered porch, 2x6 + 2 wall construction, easy alternate foundation possibilities, including basement. 

Renderings are approximate and are not literal representations of the designs. Designs are subject to change without notice.