These one-bedroom cottage plans would make an excellent ADU or granny flat. With everything on one floor, the home is easy to move around in, and it includes a flex room that could be used as an office, craft room, or additional storage.
The great room includes the kitchen, dining room, and living room in one space with vaulted ceilings. Finally, there’s a bathroom and a separate laundry room on the other side of the house. In total, you get 540 square feet of living space.
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Open-Plan Cottage w/ One Private Bedroom

Images via Etsy
There are two sets of French doors that could lead to a porch.

Images via Etsy
Exposed beams add character to the main room.

Images via Etsy
An electric fireplace offers some ambiance to the living room.

Images via Etsy
Here are some of the main highlights.

Images via Etsy
This is what you get in the plans.

Images via Etsy
This is the floor plan.

Images via Etsy
Details:
- 1 Bedroom House Plan Set:
- Modern design, suitable for a tiny house, guest house, or granny flat
- Easy-to-build with detailed plans and construction details
- Main living space includes a kitchen, separated from the bedroom
- Includes:
- 1 bedroom with central bed access and wardrobe
- 1 small office for a desk
- Open plan living room with kitchen
- Bathroom
- Laundry/technical room
- Uses:
- Can serve as a guest house, ADU, cabin, or Airbnb unit
- Essential amenities provided
- Basic materials used, adaptable color combinations
- Design and Construction:
- Wooden frame structure
- Designed according to the 2021 International Residential Code
- Trusses can be sourced commercially
- Requires knowledge of wooden frame construction
- Plan Set Includes:
- PDF printable files
- DWG editable files (AutoCAD 2004)
- Architectural and structural models in Sketchup SKP format (2019)
- Customization service available for an additional fee
- Detailed Plans:
- G101: Project cover with general notes
- A101: Foundation plan, floor plan, roof framing plan, roof plan, 4 elevations, door, and window schedule
- A102: Sections, electrical plan, electrical schedule, kitchen elevation, furniture schedule
- A103: Framing elevations, framing components schedule, estimative bill of quantities
- A202: Construction details
- 3D models: Sketchup SKP format (2019)
- Building Dimensions:
- 18 feet (width) x 30 feet (length)
- Total built area: 540 square feet (excluding exterior deck)
- Ground floor only
- Features:
- 1 bedroom (fits Queen size bed)
- 1 bathroom with single vanity and shower
- Open plan living room with kitchen (island by default)
- Small study for one person
- Laundry/technical room
- Wooden frame structure, slab on grade foundation
Learn more:
Related stories:
- 641 sq. ft. Prairie Cottage House Plans
- Yuki: 600 Sq. Ft. Cottage Plans
- 925 sq. ft. Outpost Plus Cabin Plans by Den
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Natalie C. McKee
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