An ADU (Accessory Dwelling Unit) project in California offers several advantages. These include added property value, potential rental income, and more efficient use of residential space. ADUs can serve as guest houses, rental units, or extended family living spaces, providing flexibility in accommodation. California's recent laws and regulations have become more ADU-friendly, streamlining the approval process and reducing barriers, making it an attractive option for homeowners looking to expand their property's functionality and financial potential.