Extra Space Storage 2580 Monument Blvd, Concord, CA94520 Extra Space Storage is a storage facility that offers competitive prices. It is a AAA participant and a member of the…More Chamber of Commerce. Entry to units require entering a code in order to pass through the gate. If ever in a jam while visiting there's a courtesy phone next to the rental office that connects you directly to a customer service rep. One of the perks of setting up with Extra Space Storage is that the staff will receive packages for its customers. Gate hours are 6am - 10pm.