Extra Space Storage - 3939 Mexico Road, Saint Peters, MO 63376

4.9/5 - 637 Reviews
Location:
3939 Mexico Road, Saint Peters, MO 63376
Office hours:
24/7 ACCESS
  • Mon-Fri: 9:30 a.m. - 6 p.m.
  • Sat: 9 a.m. - 5:30 p.m.
24/7 ACCESS

Extra Space Storage - 3939 Mexico Road, Saint Peters, MO 63376

  • 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.
    15x5 Self Storage 75 Sq. Ft.
    Climate-Controlled
    $104/mo
    10x5 Self Storage 50 Sq. Ft.
    $83/mo
    10x5 Self Storage 50 Sq. Ft.
    Climate-Controlled
    $69/mo
    10x5 Self Storage 50 Sq. Ft.
    Climate-Controlled Elevator
    $61/mo
    5x10 Self Storage 50 Sq. Ft.
    Climate-Controlled
    $69/mo
    5x10 Self Storage 50 Sq. Ft.
    Climate-Controlled Elevator
    $61/mo
    5x10 Self Storage 50 Sq. Ft.
    $49 - $83/mo
    5x5 Self Storage 25 Sq. Ft.
    $46/mo
    5x5 Self Storage 25 Sq. Ft.
    Climate-Controlled
    $40/mo
    5x5 Self Storage 25 Sq. Ft.
    Climate-Controlled Elevator
    $37/mo
    20x5 Self Storage 100 Sq. Ft.
    Climate-Controlled
    $142/mo
    15x10 Self Storage 150 Sq. Ft.
    Climate-Controlled
    $180/mo
    15x10 Self Storage 150 Sq. Ft.
    Climate-Controlled Elevator
    $162/mo
    15x10 Self Storage 150 Sq. Ft.
    $151/mo
    10x15 Self Storage 150 Sq. Ft.
    $203/mo
    10x15 Self Storage 150 Sq. Ft.
    Climate-Controlled
    $180/mo
    10x15 Self Storage 150 Sq. Ft.
    Climate-Controlled Elevator
    $162/mo
    10x10 Self Storage 100 Sq. Ft.
    Climate-Controlled
    $142/mo
    10x10 Self Storage 100 Sq. Ft.
    $128 - $153/mo
    10x10 Self Storage 100 Sq. Ft.
    Climate-Controlled Elevator
    $123/mo
    20x20 Self Storage 400 Sq. Ft.
    $358/mo
    20x10 Self Storage 200 Sq. Ft.
    Climate-Controlled
    $257/mo
    15x15 Self Storage 225 Sq. Ft.
    $261/mo
    15x15 Self Storage 225 Sq. Ft.
    Climate-Controlled
    $257/mo
    10x40 Vehicle 400 Sq. Ft.
    Parking RV Storage
    $160/mo
    10x30 Self Storage 300 Sq. Ft.
    Climate-Controlled
    $329/mo
    10x30 Vehicle 300 Sq. Ft.
    Parking RV Storage
    $137 - $342/mo
    10x25 Vehicle 250 Sq. Ft.
    Drive-up Access Parking RV Storage
    $288/mo
    10x20 Self Storage 200 Sq. Ft.
    Climate-Controlled
    $257/mo
    10x20 Self Storage 200 Sq. Ft.
    Climate-Controlled Elevator
    $257/mo
    10x20 Vehicle 200 Sq. Ft.
    Car Storage Parking
    $109 - $232/mo
    No units are currently available.

    Amenities & features

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

    Customer reviews

    4.9/5
    Average rating
    637
    Number of reviews

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

    Jenny has been fantastic to work with during the construction and remodeling process. Great communication and cooperation from her and her team. Have a lot of respect of how her and her team treat and speak to customers. Highly recommend this facility for your storage needs. ... Read more
    Joe P. - 4 February 2026
    Raised my rent after the 2nd month by 30 dollars and 3 months later doubled it to 150 a month for a little 3x15 space. Ridiculous. I do not recommend unless you enjoy getting screwed over. I understand an increase because of market changes but to double from 75 to 150 is absurd. The only good thing I can say is 24 hour access was convenient for a person who works nights but doesn't outweigh the constant price increases ... Read more
    Gregg B. - 23 January 2026
    I had an indoor, second floor unit at Extra Space Storage on Mexico Road in St. Charles for almost two years and overall had a great experience. The facility was always clean, carts were consistently available for moving heavy items, and it was never crowded. There is a door right by the elevator that you can pull up to, which made loading and unloading into my vehicle very easy. Every time I interacted with the office staff they were pleasant and helpful. Jenny Pinkston truly stood out. She was kind, professional, and went above and beyond to make the move out process smooth and stress free. Her customer service made a lasting impression and really reflects well on this location. All of my belongings came out exactly as they went in, clean with no mold, bugs, or dirt/dust. I had zero issues the entire time I was there and would absolutely recommend this location to anyone looking for a reliable, clean, and well managed storage facility. ... Read more
    Ammiel V. - 8 January 2026
    This company has been great since ive used them to store my belongings. The units are nice and secure. The staff is always kind and helpful. Jenny in the office is great, very pleasant, kind, and helpful to work with. ... Read more
    cleo b. - 16 December 2025
    Mary H. - 5 September 2025
    The best Storage locker I’ve ever had 24 hour access if inquired climate controlled indoor lockers if needed. I got a 10 x 15 and I love the Storage locker. It is one of the best I’ve ever seen. Staff is very friendly and kind. Unlike a lot of store lockers I’ve been to before ... Read more
    Dustin E. - 8 August 2025
    Jenny was amazing and very professional throughout the whole process in getting me the right storage unit I need. I have never had one before until now and she was extremely helpful during the whole encounter, thank you ! ... Read more
    Ravin P. - 25 July 2025
    Big Shout Out to Genny, she saved me from another day of searching and disappointment. All day I tried every storage place for car storage to no avail. I came home and searched the internet for a place lo and behold I found the last one at this EZ Space. Finally, I could take this off my plate so I relaxed when I found a place to store my car. Genny said I could do it right now to ensure I got the spot, of course, I said Please I'd love to take it. So with that done, I could now relax after this stressful day. The price was so reasonable and it's right off the highway which makes it easier for me considering I live in South City and they're in St.Peters. So happy to work with Genny she was so friendly and helpful in getting my mission accomplished after trying the entire day. Great asset to this company for sure! ... Read more
    Rose - 9 July 2025
    OMG!!! Extra Storage is the most professional and helpful and polite staff and overall safest option when it comes to your belongings! HUGE thank you to Jenny (the store manager) for making it such a smooth and pleasant experience! I would highly recommend this location specifically! Seriously! ?? ... Read more
    Incredible J. - 3 July 2025
    Jenny The manager was extremely great to work with. She not only returned my phone calls promptly when I was calling to inquire, but was Great to work with when I became a customer as well. I have never rented a unit before and she was very patient, thorough, knowledgeable, professional, and was just an all-around great experience for my company and I, I can tell she's a great asset for the company as well. Thank you Jenny! ... Read more
    Axel P. - 19 May 2025
    Melissa M. - 15 March 2025
    Mallory is the best She goes above and beyond all the time! This young lady needs a raise in pay; honestly. I look forward to her attentiveness on location and she is very patient and sincerely is the definition of above and beyond. I’m giving her her flowers each and every time! She truly made my day so much better and I want her to be recognized for that. I’ve been a customer many years and I really will tell you guys she’s a keeper! Please do not overlook her because that would be a horrible mistake! She’s a gem ???????????????????????????????????? ... Read more
    Stephanie N. - 28 February 2025
    I’ve had my items in storage at Life Storage since 2012 and am very pleased with their service. It’s climate controlled, and there was never any problems with my items molding or becoming broken down in any way. My experience with Life Storage was a very good one! ... Read more
    Rita G. - 25 February 2025
    We are very pleased with Extra Space Storage! Chris was very efficient and friendly when we reserved our unit, and Don was very helpful and friendly on our welcome/move in day. The buildings and units are spotless, well lit, and there are carts to help the process. We’re happy we chose Extra Space Storage! ... Read more
    John A. - 3 December 2024
    The best Storage locker I’ve ever had 24 hour access if inquired climate controlled indoor lockers if needed. I got a 10 x 15 and I love the Storage locker. It is one of the best I’ve ever seen. Staff is very friendly and kind. Unlike a lot of store lockers I’ve been to before ... Read more
    Dustin E. - 21 November 2024

    About this facility

    Located on Mexico Road in Saint Peters, MO, this Extra Space Storage facility offers a range of unit sizes, including small, medium, and large options, making it an ideal choice for various storage needs. Whether you're storing a few personal items or an entire home's worth of belongings, the versatility in unit sizes ensures flexibility for residents and businesses in the area.

    This facility provides climate-controlled units, which are especially useful for protecting sensitive items from Missouri's fluctuating temperatures and humidity. For added convenience, there are elevators in the multi-level storage building, as well as indoor access units for comfortable loading and unloading, regardless of the weather. If you prefer quick access, the drive-up access units are a practical option. The facility also offers parking and dedicated RV storage, accommodating oversized vehicles and recreational gear.

    With around-the-clock security cameras, a gated entrance, and an onsite manager, your belongings stay secure. This Extra Space Storage location also features 24-hour access, contactless renting, and online payment options to simplify your storage experience. For those who need moving supplies, a retail section is available onsite. This facility is an excellent choice for Saint Peters residents seeking secure, convenient storage with modern amenities.

    Price comparison

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

    Small $62/mo
    Location minimum Location maximum
    $11/mo $155/mo
    Medium $157/mo
    Location minimum Location maximum
    $54/mo $354/mo
    Large $243/mo
    Location minimum Location maximum
    $35/mo $599/mo

    Location & walkability

    This storage facility is in an area with moderate walkability and some public transit options. A personal vehicle may be needed for certain trips.

    54

    out of 100

    Walk Score

    Somewhat Walkable

    Some errands can be accomplished on foot

    37

    out of 100

    Bike Score

    Somewhat Bikeable

    Minimal bike infrastructure

    Walk Score®: 54, Bike Score®: 37

    Neighborhood highlights

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

    • Mexico Road and Muegge Road

      Transportation 0.09 miles

    • QuikTrip

      Services 0.11 miles

    • Culver's

      Food & Drinks 0.12 miles

    • All Stars Bar

      Food & Drinks 0.17 miles

    • Mario’s Donuts And Gyros

      Food & Drinks 0.17 miles

    • Saullo’s Restaurant

      Food & Drinks 0.18 miles

    • Denny's

      Food & Drinks 0.18 miles

    • Conoco

      Services 0.19 miles

    • Regions Bank

      Services 0.2 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 Mexico Road 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 Mexico Road, 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 Mexico Road for specific restrictions and recommendations.

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