The Mother Lode ADU Plans Gallery provides property owners interested in building an ADU with an easy way to compare and select from dozens of plans – including modular/prefab and site built – saving you both time and money. Like many online shopping experiences, you can filter by the kind of ADU you want (number of bedrooms, square footage, features) then view photos, floorplans, and details of all the designs you like. You can then connect directly with the designer or company.