Duplex Cabin Features Two Tiny Homes in One

Finding foundation homes under 400 square feet is rare, but many communities now welcome in-law apartments and ADUs. These spaces let families share a property while maintaining independence, making duplex plans an ideal solution for in-laws or grown kids needing their own space.

This duplex design features two 340-square-foot tiny homes joined seamlessly to resemble a single-family house. Each unit includes a living room, kitchen, bathroom, downstairs bedroom, and loft. With sleek, modern finishes and large windows for natural light, this setup is both practical and stylish. Could it be the perfect fit for your family?

Two Tiny Homes in One

Two Units in One! This 680-sq.-ft. Cabin is perfect for renting out one side while living in the other—or turning it into a cozy family retreat.

Cabin Details:

• Total Size: 680 sq. ft. (two suites)
• Per Suite: 1 bedroom, 1 bathroom, 1 loft, 340 sq. ft.
• Dimensions: 20’ x 38’ with 9′ wall height
• Construction: 2×6 R-21+ walls, trussed R-49+ roof, insulated slab foundation
• Utilities: Mini-split heating & cooling, tankless water heater, optional wood or gas fireplace
• Standards: IRC compliant
• Extras: Instant PDF download and single build license

This flexible design is perfect for dual living or renting out one unit while enjoying the other!

Images via Small House Catalog

Learn more

• See more plans from Small House Catalog