CubeSmart Self Storage - Diamond Bar

Anthony Cervantes

I stopped by CubeSmart in Diamond Bar the other day not expecting much. I was greeted by workers Jacob and Roland who were very kind and helpful making my storage needs very simple and efficient. I was a little skeptical at first but their customer service is what sealed the deal for me. 10/10 would recommend

Marlon Barrera

Great customer service and the price was fantastic. Extremely friendly and helpful. This is my first time getting a storage so Delia absolutely have me tips on how to stack and organize my stuff. I rented a15ft I haul and the 10x10 I got should be perfect for it. Thank you! Highly receiving this place!

Dodi Schauer

This CubsSmart is located in a nice, safe area of Diamond Bar! Roland and his staff take impeccable care of the grounds. He was very accomodating and professional. I like the security ideas and the, "going above and beyond" feel you get from this business. Thank you! I we appreciate it!

Sam

December 18, 2025

DO NOT STORE YOUR BELONGINGS HERE!!! There are NO security cameras, NO locks on the doors, NO empathy from the staff! Our unit was broken into and we were not notified that this happened until we visited and our keys did not fit the lock. The woman at the front desk made us wait at the unit for 30 minutes while she spoke with someone else. Waited to see if our things had been stolen, and they were! She had no idea what happened and said there were no notes on our account. We have only been here for 6 months and now we are dealing with tens of thousands of dollars of stolen belongings. She also would not help or answer our questions, all the woman kept saying was “the store manager is on vacation”. Okay, well, this is an emergency at his facility and the police are involved, so he should be contacted. On December 3rd, we were there and had an issue with mice eating through our belongings. Her solution was “get more bags to cover your things”. And that was it. The lack of empathy and customer service from this facility is absolutely absurd! If you have an issue, good luck getting any questions answered or getting someone to care. And we still have to pay for this unit while we’re dealing with all of this!! All you have to do is follow a vehicle through the gate and you’re in the clear to steal. This place is pathetic. The customer service is pathetic. The prices are pathetic. Save your money and go elsewhere!!

Winston Wells

My girlfriend Laura has a storage here. And honestly, we love it here. The manager, rowland, is always very friendly and helpful. The grounds are always clean. If you need a good spot this is it