Antioch, CA Storage Units at 815 Sunset Dr West Coast Self-Storage Antioch (formerly Antioch Mini Storage) is the most trusted storage business in Antioch, CA. Since 1978, we've offered the best combination of affordability, security, and convenience in the East Bay area. Our newly remodeled storage facility is located at 815 Sunset Dr, just north of CA-4 and west of Hillcrest Ave. For reference, we're right next door to NAPA Auto Parts. Click the button below to view our storage units and reserve or rent one in just a few minutes!