Self Storage Units in Ontario, CA

Mountain Avenue Self Storage at 112 South Mountain Avenue

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Drive-up units, 4k digital security cameras, and more. Find a storage unit you can trust with us on S Mountain Ave!

Online Payments

Elevator Access

Pest Control

Well-Lit Facility

Live-In Manager


Family Owned and Operated

Excellent Customer Service

Storage Units at S Mountain Ave & Holt

Find the right self storage unit or parking space for you!

Mountain Avenue Self Storage, located near the intersection of S Mountain Ave and Holt Blvd, offers a variety of self storage units and parking spaces for the Ontario, California, community. 

We are right by Brooks Street, easily reachable from throughout the area. With online rentals and drive-up self storage units, finding the perfect storage unit and accessing it is as easy as could be!

Start renting online now to lock in a fair monthly rate for the self storage unit that will solve your space issues. Renting is easy, and accessing your unit is even easier. 

Our on-site management is here and ready to help, and you can also learn how to contact us online, too! Find your storage unit now to get started.

Our Storage Units in Ontario, California

Find the storage units you deserve right here in Ontario

Indoor Storage Units

These storage units feature indoor access, allowing you to stay out of the elements while working at your unit. Whether you’re moving items in or searching for something you boxed up, stay out of the rain and sun!

Drive-Up Storage Units

Drive-up units allow for the easiest loading and unloading of items. In addition to the convenience of moving your items in or out, these units also feature longer access hours.

Month-to-Month Rentals

Not sure how long you’re going to need your storage unit? We get it. Renovations can stretch on. You may not get through the waiting list at that new apartment for months. That’s okay; we’ve got you covered.

Vehicle Storage in Ontario, California

A place to keep your personal vehicles

In addition to an unbeatable value on local self storage units, Mountain Avenue Self Storage also offers parking for personal cars and trucks. These parking spaces are rented month-to-month like our storage units. 

They are all uncovered spaces and are not suitable for larger vehicles (such as RVs). They benefit from the same great security as the rest of our facility, and our on-site management is happy to assist with your vehicle parking needs!

Ontario Self Storage Questions & Answers

Find the answers you need before storing your items

Whether you have questions about how self storage works or about Mountain Avenue Self Storage specifically, our team is happy to help. We’ve put together these FAQs to help you get started, but feel free to reach out to our facility’s on-site management if you need more information or assistance!

Where can I find storage units in Ontario?

Mountain Avenue Self Storage offers a variety of storage units right here in Ontario at Brooks and S Mountain Ave. This places us just by Holt.

How much does a storage unit cost at Mountain Avenue Self Storage?

Our storage units range in size and amenities, and the price will vary as a result. Check out our available units right here to find the monthly rate for what you need.

Can you help me move into my storage unit?

Moving in is easy at Mountain Avenue Self Storage! We offer free moving carts to help you move your heavy items, and you can even rent a drive-up unit to make it even more convenient.

What areas does your facility serve?

We serve a variety of communities around our facility, including Ontario, Narod, Montclair, and more!

Do you offer any regular specials for military personnel?

Military, police, and firefighters get 10% off storage units at our facilities.