4400 Horner Street
Union City, CA 94587
510-489-4747 office
510-489-4788 fax
175 Guthrie Lane
Brentwood, CA 94513
925-516-2700 office
925-516-0400 fax


Welcome to the Best and Friendliest Storage in Brentwood since 1995

Diamond Mine Mini Storage is extremely clean, secure and well managed. We provide excellent customer service. The convenience, security and peace of mind of our customers is our utmost concern. We are equipped with state of the art security system to ensure the safety and security of our tenants valuable belongings.

We have 24 hour on-site resident managers, and the facility is located 2/10 of a mile from the Brentwood Police Department in a quiet and safe neighborhood. Our digital surveillance video cameras are constantly recording 24/7. Brochures for insurance are available and optional through Deans and Homer Self Storage Insurance.

  • Office Hours 9am - 6pm
  • Month to Month Lease
  • No Deposit Required
  • All Ground Level Units
  • Individual Door Alarms
  • Every Unit is Fire Protected
  • Computerized Gate
  • Gate Hours 6am - 10:30pm, 365 days per year
  • Personal Gate Access Code
  • 24 Hour Digital Recorded Surveillance
  • Fully Illuminated
  • Resident Managers
  • Senior (55+) and Military Discount (call for details)
  • 24 Hour Access available for Commercial Accounts
  • Full Line of Moving Supplies
  • Various Unit Sizes
  • Private Mail Boxes
  • Boat or Vehicle Garage Space Available
  • FREE truck use with move-in!
    (call for details & Read Here)

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