Extra Space Storage - 3939 Castro Valley Blvd, Castro Valley, CA 94546

4.8/5 - 586 Reviews
Location:
3939 Castro Valley Blvd, Castro Valley, CA 94546
Office hours:
24/7 ACCESS
  • Mon-Sun: 6 a.m. - 10 p.m.
24/7 ACCESS

Extra Space Storage - 3939 Castro Valley Blvd, Castro Valley, CA 94546

  • Climate-Controlled

    Protect belongings from temperature changes and humidity

  • Indoor

    Units are located indoors for added protection and convenience

  • 24 hour access

    Access your unit any time, day or night, when available

    Not sure which size you need? Check our size guide to find the perfect fit.
    9x10 Self Storage 90 Sq. Ft.
    Climate-Controlled Elevator
    $406/mo
    9x10 Self Storage 90 Sq. Ft.
    $325/mo
    8x10 Self Storage 80 Sq. Ft.
    Climate-Controlled
    $274/mo
    8x10 Self Storage 80 Sq. Ft.
    Climate-Controlled Elevator
    $251/mo
    8x9 Self Storage 72 Sq. Ft.
    $301/mo
    8x9 Self Storage 72 Sq. Ft.
    Climate-Controlled Elevator
    $116 - $235/mo
    8x8 Self Storage 64 Sq. Ft.
    Climate-Controlled Elevator
    $214/mo
    7x14 Self Storage 98 Sq. Ft.
    Climate-Controlled Elevator
    $440/mo
    7x10 Self Storage 70 Sq. Ft.
    $295/mo
    7x10 Self Storage 70 Sq. Ft.
    Climate-Controlled
    $248/mo
    7x8 Self Storage 56 Sq. Ft.
    Climate-Controlled
    $209/mo
    7x7 Self Storage 49 Sq. Ft.
    $232/mo
    7x7 Self Storage 49 Sq. Ft.
    Climate-Controlled
    $189/mo
    7x7 Self Storage 49 Sq. Ft.
    Climate-Controlled Elevator
    $175/mo
    6x10 Self Storage 60 Sq. Ft.
    Climate-Controlled Elevator
    $205/mo
    6x6 Self Storage 36 Sq. Ft.
    Climate-Controlled Elevator
    $139/mo
    6x4 Self Storage 24 Sq. Ft.
    Climate-Controlled Elevator
    $103/mo
    5x7 Self Storage 35 Sq. Ft.
    $179/mo
    5x7 Self Storage 35 Sq. Ft.
    Climate-Controlled
    $74 - $148/mo
    5x6 Self Storage 30 Sq. Ft.
    Climate-Controlled Elevator
    $121/mo
    5x5 Self Storage 25 Sq. Ft.
    Climate-Controlled
    $57/mo
    5x5 Self Storage 25 Sq. Ft.
    Climate-Controlled Elevator
    $52/mo
    4x10 Self Storage 40 Sq. Ft.
    Climate-Controlled
    $163/mo
    4x10 Self Storage 40 Sq. Ft.
    Climate-Controlled Elevator
    $151/mo
    4x8 Self Storage 32 Sq. Ft.
    Climate-Controlled Elevator
    $128/mo
    4x7 Self Storage 28 Sq. Ft.
    $174/mo
    4x6 Self Storage 24 Sq. Ft.
    Climate-Controlled
    $112/mo
    4x6 Self Storage 24 Sq. Ft.
    Climate-Controlled Elevator
    $103/mo
    4x5 Self Storage 20 Sq. Ft.
    Climate-Controlled
    $98/mo
    4x5 Self Storage 20 Sq. Ft.
    Climate-Controlled Elevator
    $90/mo
    16x9 Self Storage 144 Sq. Ft.
    Climate-Controlled Elevator
    $577/mo
    10x16 Self Storage 160 Sq. Ft.
    Climate-Controlled
    $624/mo
    10x16 Self Storage 160 Sq. Ft.
    Climate-Controlled Elevator
    $606/mo
    10x14 Self Storage 140 Sq. Ft.
    $457/mo
    10x10 Self Storage 100 Sq. Ft.
    $501/mo
    9x16 Self Storage 144 Sq. Ft.
    Climate-Controlled Elevator
    $577/mo
    9x12 Self Storage 108 Sq. Ft.
    Climate-Controlled
    $466/mo
    9x12 Self Storage 108 Sq. Ft.
    $376/mo
    8x22 Self Storage 176 Sq. Ft.
    $540/mo
    8x20 Self Storage 160 Sq. Ft.
    $503 - $586/mo
    8x19 Self Storage 152 Sq. Ft.
    $487/mo
    8x18 Self Storage 144 Sq. Ft.
    Climate-Controlled Elevator
    $577/mo
    8x16 Self Storage 128 Sq. Ft.
    Climate-Controlled Elevator
    $532/mo
    8x16 Self Storage 128 Sq. Ft.
    $427 - $503/mo
    8x14 Self Storage 112 Sq. Ft.
    $379/mo
    8x13 Self Storage 104 Sq. Ft.
    Climate-Controlled Elevator
    $453/mo
    15x20 Self Storage 300 Sq. Ft.
    $982/mo
    10x25 Self Storage 250 Sq. Ft.
    Climate-Controlled Elevator
    $606/mo
    No units are currently available.

    Amenities & features

    • Climate-Controlled
    • Indoor
    • 24 hour access
    • Drive-Up Access
    • Retail Available
    • Onsite Manager
    • Security Camera
    • Gate
    • Credit Cards Accepted
    • Elevators
    • Multi-Level Storage
    • Online Payment

    Customer reviews

    4.8/5
    Average rating
    586
    Number of reviews

    Read some helpful reviews of Extra Space Storage, shared by real renters with genuine experiences and honest opinions.

    Always clean and easy to use. The staff were helpful quickly with any questions we had. The elevators occasionally go out in the building I was using but I always received a notification if they are out and when they're back in order so I can plan accordingly. At one point I switched to a smaller unit and the staff were very helpful in that process. Definitely will use this facility again! ... Read more
    Heather J. - 16 January 2026
    I'm not impressed by this place they were charging my mother ( a senior ) almost $300 a month for their smallest unit. And there's not even anyone there on Sunday. When I trying to get my mother's stuff out. Would not recommend ... Read more
    KC K. - 26 September 2025
    Place is kept clean, and a person is usually on duty in the office. Very well maintained and feels safe. I would recommend this company, we used two different storage companies before.we moved our things to CV. Both prior storage facilities were not a good experience, but since changing we are super satisfied. N&J of San Leandro ... Read more
    Judi V. - 22 September 2025
    Love this extra storage. Love the fact that all I had to do was call and help was right there when I got lost the first time trying to find the correct storage area Thank you so much love the prices also ... Read more
    Sandra W. - 22 September 2025
    Stephan Has help Alma with a new storage. He help me with all the requred Info. Very gentlemen. Epg For all the unit that i had rented informent I would recommend this storage building in castro valley. I'm very lucky to have a unit here.i thank the company for having Stephan here to help With all needed info ... Read more
    Gloria W. - 23 August 2025
    Steven S. - 21 June 2025
    Came here after a break in at Public Storage and the service was so much better. We really appreciate the help the staff gave us with moving in quickly and the fact that someone lives on property really does give that little bit of extra security that we definitely needed at the time. ... Read more
    Sakkari H. - 9 May 2025
    I am so happy I chose Extra Space, It is very convenient because I live next door, so I can back and forth easily. But the storage facility is amazing, very clean, well lit. The process to rent, was very easy also. I would definitely recommend them. ... Read more
    elmy k. - 4 April 2025
    AM - 3 April 2025
    The facility is well-maintained. Though I have experienced a break in since renting a space here, this was the only incident. As with many corporations I have noticed corporate greed set into this facility. The unnecessary and often rent hikes have made me wonder why I am storing anything in the first place. ... Read more
    Ricky L. - 5 January 2025
    Renting a storage space here is fast and easy. Customer service is great, Stephan was helpful and answered all of our questions. He helped us price out units at a few of their nearby sites, but we decided to go with CV because of the pricing, convenient location, and the facilities are clean and well-maintained. ... Read more
    Betty T. - 29 May 2024
    I’ve been to extra space storage a few times over the last 25 yrs. Recently I went back to inquire about renting a new space. Stephan at CV office was so helpful and courteous. He took me out to show me size differences and locations of each space. He was very knowledgeable and delightful. Even though the CV office didn’t have the available space I needed, he helped me find a different location that did. I will be renting soon but can’t recommend these people and this company highly enough. They truly care about you and not just renting a space. Stephan went above and beyond and I’m truly grateful! ... Read more
    Carla H. - 24 May 2024

    About this facility

    Located at 3939 Castro Valley Blvd in Castro Valley, CA, this Extra Space Storage facility offers a variety of unit sizes, including small, medium, and large, to accommodate diverse storage needs. Whether you're decluttering your home, downsizing, or seeking extra space for business inventory, you'll find options tailored to your requirements.

    This facility provides climate-controlled units, ideal for protecting your belongings from the Bay Area's fluctuating temperatures. With indoor access, drive-up access, and even elevators for multi-level storage, convenience is a priority here. The property is equipped with security cameras and features an onsite manager, ensuring a secure and reliable storage experience. You'll appreciate the 24-hour access, letting you get to your items whenever you need them.

    For added convenience, this facility accepts credit card payments and offers online payment options. Retail supplies for moving are also available onsite, making it a one-stop solution for your storage needs. This Extra Space Storage facility is an excellent choice for Castro Valley residents and businesses looking for secure, flexible, and accessible storage solutions.

    Price comparison

    See how this facility's unit prices compare to others in Castro Valley, broken down by size.

    Small $187/mo
    Location minimum Location maximum
    $41/mo $440/mo
    Medium $505/mo
    Location minimum Location maximum
    $179/mo $624/mo
    Large $794/mo
    Location minimum Location maximum
    $250/mo $1197/mo

    Location & walkability

    This storage facility is in a highly accessible area with excellent walkability and public transit options.

    77

    out of 100

    Walk Score

    Very Walkable

    Most errands can be accomplished on foot

    42

    out of 100

    Transit Score

    Some Transit

    A few nearby public transportation options

    53

    out of 100

    Bike Score

    Bikeable

    Some bike infrastructure

    Walk Score®: 77, Transit Score®: 42, Bike Score®: 53

    Neighborhood highlights

    Located near shopping, car wash stations, and other local conveniences, this storage facility helps you make the most of every visit.

    • The Burrito Shop

      Food & Drinks 0.13 miles

    • Top Thai

      Food & Drinks 0.14 miles

    • Castro Valley Park and Ride

      Transportation 0.26 miles

    • Crossroads Specialty Foods

      Grocery Stores 0.26 miles

    • BLVD Burger

      Food & Drinks 0.26 miles

    • Center Street & Ravenwood Place

      Transportation 0.27 miles

    • The Drycleaner

      Shopping 0.28 miles

    • Domino's

      Food & Drinks 0.28 miles

    • Center Street Park And Ride

      Services 0.29 miles

    Frequently Asked Questions

    The right storage unit size depends on what you plan to store and how much space you need to move around your items.

    5x5 or 5x10 units are great for smaller loads, such as chairs, lamps, small furniture pieces, boxes, books, and documents.

    10x10 or 10x15 units work well for larger furniture, bicycles, appliances, and the contents of a small apartment.

    10x20 or 10x30 units can typically fit the contents of a three-bedroom home, including large furniture and multiple appliances.

    If you’re unsure which size is best, a unit size calculator can help estimate the right fit based on the items you’re planning to store – helping you avoid paying for more space than you need.

    Climate-controlled storage units maintain consistent temperature and humidity levels, helping protect items from damage caused by heat, cold, or excess moisture.

    You may want climate control if you’re storing items that can be sensitive to temperature changes, such as furniture, clothing, appliances, paperwork, photographs, artwork, electronics, or wood and leather goods. These units are especially useful for long-term storage or in areas with hot summers, cold winters, or high humidity.

    If you’re storing durable items like tools or outdoor gear, a standard unit may be sufficient. When in doubt, climate control offers added protection and peace of mind.

    The facility at 3939 Castro Valley Blvd offers 24/7 access, allowing you to visit your unit at your convenience.

    To open your storage unit door, start by unlocking it, whether it uses a traditional padlock or a Bluetooth-enabled smart lock. Once unlocked, grab the bottom handle and lift or pull up the roll-up door until it’s fully open.

    If you’re using the unit for the first time, make sure the lock is properly removed before opening the door to avoid damage.

    Security helps protect your belongings while they’re in storage and gives you peace of mind between visits. Many self storage facilities use a combination of features such as video surveillance, gated access, on-site management, and well-lit premises to help deter unauthorized access.

    At Extra Space Storage - 3939 Castro Valley Blvd, available security amenities may include Security Camera, Gate, Onsite Manager, designed to help keep your items protected.

    Yes, most standard vehicles can be stored in self storage units. A 10x20 unit typically provides enough space for a car, while outdoor or designated parking areas may be available for larger vehicles.

    For safety reasons, most self storage facilities restrict certain items. These commonly include:

    • Hazardous, flammable, or toxic materials
    • Perishable food
    • Live plants or animals
    • Cash, firearms, or irreplaceable valuables

    Always check with the facility at 3939 Castro Valley Blvd for specific restrictions and recommendations.

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