Granny Units are no longer just for Granny. Many clients are looking at ways to use their property to provide additional income. Many are converting garages or sheds to Granny units, also known as an Accessory Dwelling Unit or ADU. Our clients in Sonoma purchased property that had an old 5,000 SF Milking Barn on it. It is no longer in use but still had some good bones. We were hired to help them convert one side of the 3 tiered barn to become a one bedroom apartment "Granny Unit" that they could rent out.