• Union City4400 Horner Street 94587-2552

    Phone: (510) 489-4747
    Fax: (510) 489-4788
    Hours:
    Directions/Map


    Union City's First and Largest Storage Center!

    Safety and security of your valuable belongings is our #1 priority. Our facility is not only clean and well managed, but also provides state of the art security, which includes; A 24-hour resident manager, individual alarms on each unit, an electronic gate, fire protection for each unit, and a 24-hour taped video monitoring system, which not only ensures the security of our site, but also qualifies us to offer Insurance through Deans & Homer, the Insurance provider for self-storage facilities. We look forward to giving you the peace of mind of knowing your valuable belongings are being stored safely and securely.



  • Brentwood175 Guthrie Lane 94513-4002

    Phone: (925) 516-2700
    Fax: (925) 516-0400
    Hours:
    Directions/Map


    Welcome to the Web Site of Diamond Mine Mini-Storage, Inc.

    Our first facility was opened in Union City in 1980. It was Union City's first self-storage facility, and remains its largest. In 1995 we opened our Brentwood facility. It is operated on the same concept as the storage site which is so successful in Union City: Our facilities are extremely clean and well managed; the convenience and peace-of-mind of our customers is our utmost concern; we utilize state of the art equipment to ensure the safety and security of our customer's valuable belongings.

    A 24-hour resident manager, individual alarms on each unit, an electronic gate, fire protection for each unit, and a 24-hour taped video monitoring system not only ensure the security of our site, but also qualify us to offer Insurance through Deans & Homer, the Insurance provider for self-storage facilities.