At Foundation9, we design ADUs that feel intentional, livable, and fully connected to the property they belong to. With extensive experience in accessory dwelling design, we know how to turn limited square footage into spaces that feel comfortable, efficient, and complete.

Whether you need a guest suite, rental unit, home office, or space for family, we help shape the right solution from the start. Our team considers zoning, privacy, natural light, storage, site flow, and constructability so the final design works as well in real life as it does on paper.

Through select partnerships, including Cottage, we pair thoughtful architectural design with efficient delivery. The result is an ADU that adds lasting value, supports the way you live, and looks like it was always meant to be there.