PMHI offers 8 prefabricated granny flat kits ranging from 600 sq ft to 1200 sq ft. Within the PMHI granny flats collection, we have multiple options with up to 2 bedrooms and 2 bathrooms. Pacific Modern Homes Inc. manufactures superior prefab flat houses with a modern aesthetic that meets the needs of both DIY home builders and general contractors. Explore our 1-story granny flat kits below and find the perfect plan for you.