Diamond Mine Mini Storage - Union City

(8 reviews)

Clean, organized, and professional! This storage facility is truly top-tier. As someone who is very…read morecautious about cleanliness and security and admittedly terrified of rodents and cockroaches, I couldn't be happier with my choice. Storewell (Hesperian location) is exactly as advertised: spotless, secure, and well-maintained. I searched extensively across two counties, visiting multiple facilities that either had poor reviews or didn't look anything like their photos. Storewell on Hesperian was the only one that exceeded my expectations and matched its presentation. If you ever need a larger unit, they maintain a waitlist with a transparent process for who gets priority, which makes planning easy and stress-free. I felt confident and relieved knowing my belongings were stored here. Highly recommend!

I have been a customer here for a few years now and always have very good experience when I have to…read moretalk to the staff in the office. I recently rented a storage near my house and was planning on canceling storewell but I feel more Safe and comfortable here so I had my unit upgraded to a bigger one instead. The process to upgrade is quick and easy and the facility is always exceptionally clean. I had the opportunity to meet new employee Aaron and he is already doing an excellent job. Keep up the good work storewell!!

Cal Self Storage & RV Parking

(17 reviews)

I checked out a few places and i have to say Cal Self Storage and RV Parking stood out for a few…read morereasons: 1. Prompt response by David 2. The property is so clean! You can tell the owners and the management take great pride in their environment! 3. Price was so much less than other places!!! Best VALUE! 4. Security!!! There is a manager that lives ONSITE!!! yes, ONSITE!!! 5. Camille was very meticulous with the paperwork and made sure everything added up and was correct! 6. MOST OF ALL, David was incredible. He drove me around, and let me look at multiple units. I notice the exterior lighting an cameras. But most of all, he was so helpful in his advice and knowledge of what size and kind of storage I needed. He knows the business, he knows the place and he knows how to treat customers. Absolutely the best place!

From my online inquiry, to touring in person and to signing the paperwork, this place has been…read moreamazing! They got back to me on Yelp right away with a thorough answer that had all the helpful information needed to make a decision. When I went in person to tour the facility in person because I still was unsure about what size I needed, Dave was phenomenal and absolutely great to work with. He was super patient when I wanted to see multiple units and made signing all the paperwork fun. The facilities overall are well kept, all units were clean and so were the general premises. All the units are drive up and incredibly easy to load and unload to. To top it all off, they are in a great area, have the best pricing and multiple deals to save money as well. I highly recommend this place for all storage needs.

A-1 Armor Self-Storage

(24 reviews)

Ranu was very helpful and friendly, she made a way that I could get the vehicle that I wanted. I…read morehighly recommend their u-haul location.

A1 Armor was quick to respond to our storage needs. Ranu was friendly and allowed us use of their…read moretruck on moving day. She is readily available during work hours and alert to unexpected comings and goings on the property, adding to our sense of security. I recommend A-1 Armor.

A1 Self Storage and Parking

(1 review)

I was looking for a self storage unit for my small business and needed something that was easy for…read moreour big truck to access. I could not find anything in the area with a large enough driveway to access my storage unit until I found this gem of a company! This self storage container had a large drive way and they had the best deal on the container size we needed. Raj was very helpful and they're contactless process was great! I highly recommend this place for self storage needs as a small business owner and I've already referred over two of my friends!

From the owner: A1 Contractor Self Storage and Parking is a reliable and secure storage facility that offers…read moreconvenient solutions for both contractors and individuals. We provide a variety of storage options, including easy drive up access, to accommodate various needs. Our spacious parking area is perfect for storing vehicles, trailers, and equipment. With state-of-the-art security measures, 24/7 access, and flexible leasing options, A1 Contractor Self Storage and Parking ensures peace of mind and easy access to your belongings whenever you need them. Whether you need short-term or long-term storage solutions, A1 Contractor Self Storage and Parking is your trusted partner for reliable, convenient, and secure storage and parking services.

Public Storage

4.0

(47 reviews)

I moved my belongings into this storage facility in September 2025 after closing my business of 10…read moreyears. That alone was devastating. I chose this location because the online rate was $184 -- already a stretch for me while working two jobs and trying to stabilize financially. In January 2026, with almost no notice, they increased my rent by $92 -- bringing it to $276. There was no limited promotion disclosed, no explanation, and no issue with my account. I've paid on time every month. Because of this sudden increase, I now cannot afford the unit and will likely have to sell everything I placed there -- items I stored during one of the hardest transitions of my life. After I left a 1-star review, they offered a $23 "discount" for only three months. That does not fix the issue. It feels insulting. If you rent here, understand that your rate can increase significantly at any time, regardless of payment history. If you need stability or are already financially stretched, reconsider before signing. What they did was opportunistic and incredibly disappointing.

Very Lisa I hope I got it right, helpful when I was setting up my rental. App is awesome.read more

Saf Keep Storage

4.2

(55 reviews)

Had a unit here for over three years and no issues with my stuff at all. I can't speak to storing…read morebigger things here but if you just need a 5 by 5 they're great. I see there aren't that many reviews on Yelp so just giving a shout out to them and verifying that they're still going strong lol. Also, the staff is good and they do get in their patrol carts and go around the lot to keep an eye on things. So it doesn't feel deserted like some storage places do.

I had a great experience with Saf Keep Storage. The facility is clean, well-maintained, and easy to…read moreget to. The staff are very kind and helpful, and the management does an excellent job running the place.I currently rent two units and am planning to rent two more. The reason I need a warehouse is to store my furniture separately, item by item, rather than piling everything together. The current promotion is also a really good deal I didn't expect such a great offer, and it made the decision even easier. Highly recommended.

Security Public Storage

4.4

(88 reviews)

•$$

My parents have had a wonderful experience at this location and they wanted me to reach out on…read moretheir behalf to thank Joaquin for an easy and wonderful encounter. They said he was very helpful and kind in helping them pick what was best suited their needs. Thank you for making their experience an easy and effortless one!:)

I had an issue with the facility accidentally putting a lock on my unit but that has now been…read moreresolved. I like the hours that the gate is open and the facility is pretty clean. The units have lights on timers. Staff overall are friendly. The units are reasonably priced.

Brother Movers

4.8

(1.9k reviews)

They are very efficient. I hired them the first time for my move and they did a great job so I used…read morethem again a couple weeks later for another small move

We had a Great experience. Polite and helpful crew. Strong recommendation. No complaints.read more

Ontrack Moving & Storage

(835 reviews)

Jorge and his crew were professional and accommodating. They went above and beyond to make our move…read moreless stressful: packing things so we could find them easily on the other end, ensuring floors/carpets were protected, and checking in with us when there were decisions to be made. We would definitely use Ontrack again!

I've used Ontrack for a number of moves for clients. Ontrack does a great job!…read more The office staff is always helpful, responsive and friendly. Although we've had different movers each time, every single man has been polite, careful with our stuff and even willing to help with moving and rearranging things once we get to our destination. I will continue to use Ontrack whenever I need movers!

Pronto Furniture Assembly

(207 reviews)

Carlos assembled a sofa sleeper for me. Historically, I would do it myself, however, I have some…read moremusculoskeletal issues that force me to delegate such projects now. Carlos was on time, courteous, careful, considerate, and efficient. All this at a great price. I will call upon Carlos to assistance again.

I had Carlos and his team assemble our European style kitchen cabinets. They were made of finished…read morewood and lacquer cabinets. We sent our kitchen assembly instructions ahead of time to make sure they were aware. My overall sense is that Carlos is fairly capable and experienced but either his team or him are not as careful as we had damages to our finished wood toe kicks and our lacquer cabinets looked like they had been dragged over nails as they were being assembled. I didn't appreciate that they made 0 mention of it at all and I had to point it out. As the homeowner, I essentially had to baby sit them for 5 days through the install since it felt like they were incapable / unwilling to read the kitchen cabinet installation instructions in detail and I caught several mistakes early on during the cabinet assembly that made me hesitant to leave it unattended. Carlos's attitude was particularly bad through the entire experience as well. Always made it seem like we were inconveniencing him or being too nit picky even if we caught some mistakes. At one point, he even threatened to quit after the assembly but before the installation simply because he had underestimated the complexity of the project. We did have a 1 day delay due to some plumbing / electrical issues but that's pretty typical as far as kitchen cabinet installations go AFAIK. In the end, they were able to get all the kitchen cabinets installed, albeit with a lot of effort from my end due to the more custom nature of the project. The price was affordable and the work was solid (minus the scratches) but for me the bad attitude wasn't worth it.

JMV Tree Service

(544 reviews)

Terrific company. Super fast response time. Excellent communication. Crew showed up at the schedule…read moretime on the dot and knocked out the job super quickly. Will call them again the next time I need tree trimming service.

Very skilled in trimming and shaping the trees. They are fast, put everything back in it's place…read moreand clean up very nicely. I've used them 3 times and am very satisfied with the service.

Junky Boys

(114 reviews)

A weight has been lifted! So relieved we found reliable and professional people to remove our…read moreantique grand piano from our place in Fremont. The team was very professional and it went so smoothly! Would definitely request services from here again if ever we need it!

I needed a last-minute curbside trash pickup in Oakland, and Junky Boys came through! They took…read morecare of my junk removal very quickly and professionally. The team was fast, friendly, reliable, and made the entire process easy. I highly recommend them!

Calwest Recycling

3.9

(14 reviews)

I had a few electronic wastes to dispose off (40 inch LCD TV, 2 old PCs, and other stuffs). I tried…read moreto look for a place that would pay me for the junks and found this place from local PennySaver in the mail. On some school e-waste collection events, they even wanted to charge me $10 or $20 for bringing them the junks...no thank you. I was paid $0.35/lb for computers (59 lb) and $0.11/lb for the TV (44 lb). I collect a bit over $25 for the e-waste, which is pretty good. Actually, I brought in two 40 inch LCD TVs and another customer at the parking lot asked to purchase one TV for $10 thinking of trying to repair it. Overall, it's a great experience. Customer service was quick and friendly.

I had a terrible experience at CalWest Recycling. The owner was incredibly rude and unprofessional…read morefrom start to finish. Not only was he cursing at me, but he also called me a "dick," which is completely unacceptable behavior for someone running a business. To make matters worse, I was instructed to unload and move my own pallet of batteries for recycling. After I had already done the work, I was suddenly told I couldn't continue because I was wearing Birkenstocks. If that was actually a safety policy, one of the employees could have easily told me before I started unloading instead of waiting until I was finished. When I was told I had to wait in my car, I simply walked over to my vehicle, and the owner continued insulting me by calling me a "dick" as I left. Customer service and basic professionalism were completely absent. There are plenty of other recycling businesses that treat their customers with respect. I would definitely recommend taking your business elsewhere.

U Junk It We Dump It

(316 reviews)

Very quick response and fast dispatch. The process was…read moreprofessional and chat was friendly. Will hire again

Amazing, fast service!! We moved out of our old house and unfortunately a free bulk pickup date was…read moreonly available after we return the keys, so we went the junk removal route. U Junk It We Dump it provided an estimate and sent someone over within a couple hours. We received a completion photo and were able to pay without being present. Great experience!

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Beth C.

0

22

7

25 days ago

If you are looking for storage come to Diamond Mine Mini Storage. It's secure, gated with camera Managers Timothy and Dianne and Asst Mgr Arnold got excellent customer service. They will help you if you got problems with your storage like if you lost your keys for your storage. Great Team!!! Thank you Agapito Bagon Maria Castro D-1 read more

Dana T.

0

2

0

10 years ago

The people at Diamond Mine Mini Storage all ways are there to go above and beyond to help my needs I've been with them for 2 years and they always help me out and they're very kind people and they always make sure they look out for your best interest read more

Chris J.

0

1

0

14 years ago

Horrible staff, The manager Eva is a terrible person. If your going to rent here good luck. They will leave a foul taste in your mouth

Twinkle O.

0

2

0

9 years ago

I just moved in recently and the managers were very helpful. Excellent customer service!

Diamond Mine Mini Storage - Union City - selfstorage - Updated August 2026

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360 Storage Center

(60 reviews)

Easy to access space. They sell "air conditioned" vs non air conditioned floors. I got to take a…read moretour of the place first. And ended up going without ac because that floor was so chilly, even on the Staff was really nice. Everything felt secure. The only con is access to the storage area closes a bit early.

Remember they require you buy insurance, insurance company did not pay you if they broken in on…read morethe top without damage the lock, insurance company policy won't pay you a dollar.

Storewell Self Storage

(8 reviews)

Clean, organized, and professional! This storage facility is truly top-tier. As someone who is very…read morecautious about cleanliness and security and admittedly terrified of rodents and cockroaches, I couldn't be happier with my choice. Storewell (Hesperian location) is exactly as advertised: spotless, secure, and well-maintained. I searched extensively across two counties, visiting multiple facilities that either had poor reviews or didn't look anything like their photos. Storewell on Hesperian was the only one that exceeded my expectations and matched its presentation. If you ever need a larger unit, they maintain a waitlist with a transparent process for who gets priority, which makes planning easy and stress-free. I felt confident and relieved knowing my belongings were stored here. Highly recommend!

I have been a customer here for a few years now and always have very good experience when I have to…read moretalk to the staff in the office. I recently rented a storage near my house and was planning on canceling storewell but I feel more Safe and comfortable here so I had my unit upgraded to a bigger one instead. The process to upgrade is quick and easy and the facility is always exceptionally clean. I had the opportunity to meet new employee Aaron and he is already doing an excellent job. Keep up the good work storewell!!

Available Self Storage

4.4

(8 reviews)

Discriminatory and horrible customer service. My mom went in today to lease a storage unit and she…read moreis an immigrant that has trouble reading and speaking english. Management refused to allow her to send photos of the lease agreement for me to translate for her and instead refused to lease a unit to her. Poor business practices all around. Avoid this place at all costs.

Looking for a place to store your items for a while. This place is nice and affordable. Ask about…read morethe specials as they may have one available. You can rent at month to month term, which I like. The lady that helped me was very informative as this was all new to me and she guided me through the process and was very patient. Recommend if you are looking for storage in this area.

A-1 Armor Self-Storage

(24 reviews)

Ranu was very helpful and friendly, she made a way that I could get the vehicle that I wanted. I…read morehighly recommend their u-haul location.

A1 Armor was quick to respond to our storage needs. Ranu was friendly and allowed us use of their…read moretruck on moving day. She is readily available during work hours and alert to unexpected comings and goings on the property, adding to our sense of security. I recommend A-1 Armor.

Hayward Self Storage

3.8

(44 reviews)

This place is managed like trash! The guy that works here is really helpful but Ann Nealon is…read moredisrespectful, rude, and absolutely useless. A bunch of units were broken into and all she had to say was " file an insurance claim". no type of sympathy, no type of help, no reassurance that our stuff will be safe, and she thought it was funny! Makes me feel like she had something to do with it. Ive been here for 5 years and NEVER had a problem until she took over. DO NOT COME HERE. Take your money somewhere else!

Last month I needed to rent a small storage unit for my son for one month…read more WOW, I was so IMPRESSED with the Fantastic customer service provided by Ladonna! Ladonna was professional, efficient, completely on top of every detail and has a great way talking with people. If I had my own business, I would hire an employee like Ladonna immediatly! The units are clean, easily accessible to load from your car, well-maintained, secure and the place is easy to find, it's right off the freeway. This was a FANTASTIC experience! Thank you Ladonna!!

Automall Parkway Self Storage