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CubeSmart Self Storage - Diamond Bar

275 S Prospectors Rd, Diamond Bar, CA 91765
Rating Badge
4.5
(44)
Rating Badge
4.7
(441)
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5% Military discount
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5% Military discount (applies to active-duty only)

Available Storage Units (19)

5x10

$1.56 / sqft
small storage unit
Features
Upstairs via ElevatorInterior

25% OFF

$78.00
$104.00
Reserve Now, Pay LaterYou will not be charged until move-in

5x10

$1.68 / sqft
small storage unit
Features
1st FloorInterior

25% OFF

$84.00
$112.00
Reserve Now, Pay LaterYou will not be charged until move-in

5x10

$1.70 / sqft
small storage unit
Features
Upstairs via ElevatorInterior

25% OFF

$84.75
$113.00
Reserve Now, Pay LaterYou will not be charged until move-in

8x10

$1.31 / sqft
medium storage unit
Features
Upstairs via ElevatorInterior

25% OFF and Half Off First Month

$105.00
$140.00
Reserve Now, Pay LaterYou will not be charged until move-in

5x17

$1.66 / sqft
medium storage unit
Features
1st FloorInterior

40% Off and First Month Free

$141.00
$235.00
Reserve Now, Pay LaterYou will not be charged until move-in

10x10

$1.21 / sqft
medium storage unit
Features
Upstairs via ElevatorInterior

25% OFF and Half Off First Month

$120.75
$161.00
Reserve Now, Pay LaterYou will not be charged until move-in

10x10

$1.30 / sqft
medium storage unit
Features
Upstairs via ElevatorInterior

25% OFF and Half Off First Month

$129.75
$173.00
Reserve Now, Pay LaterYou will not be charged until move-in

10x12

$1.09 / sqft
medium storage unit
Features
Upstairs via ElevatorInterior

40% Off and First Month Free

$131.40
$219.00
Reserve Now, Pay LaterYou will not be charged until move-in

10x12

$1.18 / sqft
medium storage unit
Features
Upstairs via ElevatorInterior

40% Off and First Month Free

$141.60
$236.00
Reserve Now, Pay LaterYou will not be charged until move-in

10x20

$1.30 / sqft
medium storage unit
Features
Drive Up AccessOutdoor Access

25% OFF

$260.25
$347.00
Reserve Now, Pay LaterYou will not be charged until move-in

10x22

$1.42 / sqft
large storage unit
Features
Drive Up AccessOutdoor Access

40% Off and First Month Free

$313.20
$522.00
Reserve Now, Pay LaterYou will not be charged until move-in

10x22

$1.54 / sqft
large storage unit
Features
Drive Up AccessOutdoor Access

40% Off and First Month Free

$337.80
$563.00
Reserve Now, Pay LaterYou will not be charged until move-in

10x25

$1.35 / sqft
large storage unit
Features
Drive Up AccessOutdoor Access

40% Off and First Month Free

$337.20
$562.00
Reserve Now, Pay LaterYou will not be charged until move-in

10x25

$1.45 / sqft
large storage unit
Features
Drive Up AccessOutdoor Access

40% Off and First Month Free

$363.60
$606.00
Reserve Now, Pay LaterYou will not be charged until move-in

10x28

$1.21 / sqft
large storage unit
Features
Drive Up AccessOutdoor Access

40% Off and First Month Free

$337.80
$563.00
Reserve Now, Pay LaterYou will not be charged until move-in

10x30

$1.14 / sqft
large storage unit
Features
Drive Up AccessOutdoor Access

25% OFF and Half Off First Month

$342.75
$457.00
Reserve Now, Pay LaterYou will not be charged until move-in

10x32

$1.34 / sqft
large storage unit
Features
Drive Up AccessOutdoor Access

40% Off and First Month Free

$428.40
$714.00
Reserve Now, Pay LaterYou will not be charged until move-in

10x38

$1.20 / sqft
large storage unit
Features
Drive Up AccessOutdoor Access

40% Off and First Month Free

$457.20
$762.00
Reserve Now, Pay LaterYou will not be charged until move-in

20Long

Vehicle unit
Features
Outdoor-uncovered

40% Off and Second Month Free

$219.00
$365.00
Reserve Now, Pay LaterYou will not be charged until move-in

Complete Amenities & Features

About CubeSmart Self Storage - Diamond Bar

CubeSmart Self Storage is committed to providing our customers with excellent products, facilities, and customer service. Our customers enjoy many perks including moving services, packing & shipping supplies, storage customization, and business services - along with the best discounts in the industry

ACCESS

  • Electronic gate accessElectronic gate access
  • Handcarts or dolliesHandcarts or dollies

SECURITY

  • Video cameras onsiteVideo cameras onsite
  • Fenced + LightedFenced + Lighted
  • Resident ManagerResident Manager

OFFICE HOURS
SundayClosed
Monday9:30 AM – 6:00 PM
Tuesday9:30 AM – 6:00 PM
Wednesday9:30 AM – 6:00 PM
Thursday9:30 AM – 6:00 PM
Friday9:30 AM – 6:00 PM
Saturday8:30 AM – 5:00 PM
ACCESS HOURS
Sunday6:00 AM – 10:00 PM
Monday6:00 AM – 10:00 PM
Tuesday6:00 AM – 10:00 PM
Wednesday6:00 AM – 10:00 PM
Thursday6:00 AM – 10:00 PM
Friday6:00 AM – 10:00 PM
Saturday6:00 AM – 10:00 PM

VEHICLE STORAGE REQUIREMENTS

  • Requires titleRequires title
  • Requires registrationRequires registration
  • Requires insuranceRequires insurance
  • Must be drivableMust be drivable

PROPERTY COVERAGE

  • Insurance requiredInsurance required
  • Insurance available for purchaseInsurance available for purchase
  • Homeowners or renters insurance acceptedHomeowners or renters insurance accepted

PAYMENTS

  • CashCash
  • Credit cards accepted: Visa, Mastercard, AMEX, DiscoverCredit cards accepted: Visa, Mastercard, AMEX, Discover
  • CheckCheck

BILLING

  • Email invoicing availableEmail invoicing available
  • Automatic payments availableAutomatic payments available
  • Rent due on same day each month per lease startRent due on same day each month per lease start

MISCELLANEOUS

  • Bilingual managerBilingual manager
  • Mail or packages acceptedMail or packages accepted
  • Moving supplies for saleMoving supplies for sale
  • Paperwork can be done remotelyPaperwork can be done remotely

Customer Reviews

4.5(44)
Verified (44)Google (441)

Rental of storage unit

by JoAnne Hoffman

May 3, 2025

5.0

Clean facility, security cameras, friendly professional staff

very good

by weiping Hu

April 7, 2025

5.0

Convenient, reasonable price, good service

Good custom service

by Fred

March 17, 2025

5.0

Great facility only thing is there is no light in the locker so be sure to bring a flashlight

Itテ「竄ャ邃「s Excellent!

by Jing Lih Ko

October 7, 2024

5.0

I had a great experience and the manager was very helpful.

good unit

by kayla

June 9, 2024

5.0

good unit all went well, owner was great

Tom Wood's profileTom Wood
June 1, 2026

Super friendly and caring staff. I had a great customer experience with this location. Pricing is very reasonable too. I would definitely recommend this place to anybody who has storage needs.

Marlon Barrera's profileMarlon Barrera
October 29, 2025

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's profileDodi Schauer
October 17, 2025

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's profileSam
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's profileWinston Wells
October 31, 2025

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

How to Rent a Storage Unit With Storage.com

There are two easy ways to secure a unit at this storage facility

1You can complete your rental process online today and go straight to your unit when you plan to move in.
2You can make a reservation today with no payment until you sign your lease at your move-in date.
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