What if that ADU you’ve always wanted to toss in your backyard could be made with prefabricated pieces you fit together like Legos, according to your design and space needs, with pitched roofs and modern, light-filled interiors? Or maybe you’re more enthralled by a custom 10-by-30-foot Craftsman idyll with a wine bar for two?

At just over a year old, Mark Dearing’s Mini Mansions is one of the newest makers on the block: Dearing’s a carpenter by trade who turned his skills at high-end cabinetmaking for spacious homes to fitting out smaller structures with the same detail and craftsmanship—down to built-in walnut wine racks. At 10 feet by 30 feet, his creations are slightly larger than the norm for something “tiny,” but the extra space allows for full appliances and a bedroom that can fit a king-size bed, creating what he calls “a more livable, more practical way to downsize.” 

Meanwhile, Studio Petretti has made custom ADUs since 2015. The studio came up with the Stuga (named after the Swedish word for cottage): design-forward, prefabricated modules that can be an ADU all by themselves, or pieced together in various configurations to suit the space and design needs of individual clients.

The results are sleek, light-filled spaces with warm woods and clean lines. Bonus? Studio Petretti is doubling down on sustainability, using low-VOC paints, rockwall insulation, and a roof pitch that’s optimized for gathering solar energy.