Explore the size ranges, room programs, stories, and features commonly available for each ADU type. Exact internal plan names, source files, and reusable plan-library records are not published.
GC
Garage Conversion ADU
Best when an existing garage envelope can become conditioned living space.
250–800 SF typicalStudio, 1 or 2 bedroomsAttached or detached garage
Configurable features
- Existing width, depth, ceiling height, and fixed conditions
- Garage-door infill, windows, doors, and egress direction
- Kitchenette or full kitchen
- Bathroom, laundry, storage, and material selections
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J
Junior ADU (JADU)
A smaller living unit created within eligible existing residential space.
Up to 500 SFStudio or compact 1 bedroomExisting-space conversion
Configurable features
- Compact living/sleeping arrangement
- Efficiency kitchen
- Bathroom relationship and access
- Storage and utility coordination
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D
Detached Backyard ADU
A separate backyard home configured around the available footprint and program.
400–1,200 SF typicalStudio to 3 bedrooms1 or 2 stories
Configurable features
- Width, depth, ceiling height, and stories
- Bedroom and bathroom program
- Exterior style, roof direction, and openings
- Kitchen, living, laundry, storage, and finishes
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A
Attached ADU
An addition connected to the primary home through a shared wall or conditioned connection.
350–1,000 SF typicalStudio to 2 bedrooms1 or 2 stories
Configurable features
- Shared-wall and access relationship
- Footprint and room program
- Exterior openings and privacy
- Fire separation, utilities, and structural review flags
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