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(303) 321-3055

Mini U Storage - 3900 East 45th Avenue, Denver, CO

Self Storage 30 - 400 Sq. Ft.
4.8/5 - 504 Reviews
(303) 321-3055
Location:
3900 East 45th Avenue, Denver, CO 80216
All units
Small
Medium
Large
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Units Availability
Small Storage Unit
5x15
Self Storage
75 Sq. Ft.
Drive-up Access
First Floor Access
$131/mo
Small Storage Unit
5x10
Self Storage
50 Sq. Ft.
Drive-up Access
First Floor Access
$98/mo
Small Storage Unit
5x6
Self Storage
30 Sq. Ft.
Drive-up Access
First Floor Access
$87/mo
Medium Storage Unit
10x15
Self Storage
150 Sq. Ft.
Drive-up Access
First Floor Access
$197/mo
Medium Storage Unit
10x10
Self Storage
100 Sq. Ft.
Drive-up Access
First Floor Access
$157/mo
Large Storage Unit
10x40
Self Storage
400 Sq. Ft.
Drive-up Access
First Floor Access
$483/mo
Large Storage Unit
10x30
Self Storage
300 Sq. Ft.
Drive-up Access
First Floor Access
$417/mo
Large Storage Unit
10x25
Self Storage
250 Sq. Ft.
Drive-up Access
First Floor Access
$307/mo
Large Storage Unit
10x20
Self Storage
200 Sq. Ft.
Drive-up Access
First Floor Access
$274/mo

Amenities

  • Drive-Up Access
  • Retail Available
  • Onsite Manager
  • Truck Rentals
  • Security Camera
  • Gate
  • Parking
  • Credit Cards Accepted
  • First Floor Access
  • Online Payment

What customers are saying

4.8/5 - 504 Reviews

Read some helpful reviews of Mini U Storage at 3900 East 45th Avenue, shared by real renters with genuine experiences and honest opinions.

I have had the best experience here at this location! Andrea is the greatest!! I am from Texas here on business, Andrea has helped me every step of the way, and this is hands down one of the cleanest places I have ever visited or done business with. 10/10 recommended to anyone who is needing to store anything! ... Read more
Chance V. - 24 February 2026
Paul at Mini U Storage was fantastic to work with. He was friendly, knowledgeable, and made the entire process quick and stress-free. The facility is clean, secure, and well-run, and Paul’s customer service really stands out. Highly recommend ... Read more
John V. - 24 February 2026
Andrea is an amazing woman! It's so great to know that I can get the best customer service possible. Her staff is so great. Maintenance is awesome! It's a great location for a great price and amazing staff!! ... Read more
Julia P. - 23 February 2026
Ethan W. - 23 February 2026
????? Andrea is the reason this place deserves five stars. She went above and beyond—walked me through everything, personally showed me the unit, had it cleaned again just to be extra thorough, let me set my own gate PIN, and even offered supplies. Nothing felt rushed, nothing felt transactional—just genuinely supreme customer service. If you’re considering Mini U Storage in Denver, ask for Andrea. Absolute rockstar. ... Read more
Bubblegum G. - 24 January 2026
Jonathan L. - 28 August 2025
This has been the best experience I've had with a storage facility. They have great customer service and are willing to work with you. I would recommend to anyone e I know that needs a storage. Thank you Andrea and Tavon keep up the great work! ... Read more
Secrets K. - 28 June 2025
This was a great place to store additional stuff prior to a move. The location is very convenient and easy to access. The biggest perk of this place is their customer service. Great customer service is hard to come by these days, and I'm shocked whenever people are accommodating and kind. Every person I've talked to at this site has been kind, respectful, and super helpful! I would totally use this place again! ... Read more
Sukhmeet S. - 23 June 2025
Christina M. - 17 June 2025
The managers made the rental experience so easy and convenient for us. Having a truck rental to help move our things was a huge benefit as well. We appreciated the great customer service a lot! We highly recommend this facility for storage. ... Read more
Renee B. - 31 March 2025
Excellent Customer Service! They were very professional an helpful! I would definitely recommend to anyone! Andrea & Mike did ~~RAISE~~ WORTHY exemplary work!! I was blown away by their hospitality an kindness! ... Read more
Miranda - 31 March 2025
Sarah R. - 25 March 2025
Gigi - 4 March 2025
Chris L. - 28 October 2024

Storage units in nearby cities

Here is how Denver, CO, compares to other nearby cities. Overall, there are many other great self storage opportunities in the area. Glendale, CO, is just 6 miles away and has 1 storage facility. Monthly rents there start at $56. However, you could also drive to Federal Heights, CO, which is 10 miles away and which also offers storage units for as little as $15. Northglenn, CO is also just 11 miles distant. Listings there show no less than 3 facilities, with unit prices starting from $55. Looking a bit further away, storage facilities in Greenwood Village, CO, and Englewood, CO, have multiple types of units available, with monthly costs starting at $38 and $27, respectively.

Storage units in Glendale, CO Within a 6-mile radius
1 Facility
From $56/mo
Storage units in Federal Heights, CO Within a 10-mile radius
4 Facilities
From $15/mo
Storage units in Northglenn, CO Within a 11-mile radius
3 Facilities
From $55/mo
Storage units in Greenwood Village, CO Within a 11-mile radius
1 Facility
From $38/mo
Storage units in Englewood, CO Within a 12-mile radius
14 Facilities
From $27/mo
Storage units in Sheridan, CO Within a 12-mile radius
3 Facilities
From $60/mo
Storage units in Wheat Ridge, CO Within a 12-mile radius
4 Facilities
From $40/mo
Storage units in Lone Tree, CO Within a 17-mile radius
2 Facilities
From $32/mo
Storage units in Ken Caryl, CO Within a 19-mile radius
5 Facilities
From $30/mo
Storage units in Superior, CO Within a 19-mile radius
1 Facility
From $65/mo
Storage units in Louisville, CO Within a 20-mile radius
2 Facilities
From $67/mo
Storage units in Lafayette, CO Within a 20-mile radius
2 Facilities
From $79/mo
Storage units in Erie, CO Within a 21-mile radius
9 Facilities
From $35/mo
Storage units in Golden, CO Within a 22-mile radius
6 Facilities
From $40/mo
Storage units in Evergreen, CO Within a 31-mile radius
2 Facilities
From $80/mo
Storage units in Platteville, CO Within a 33-mile radius
1 Facility
From $49/mo
Storage units in Berthoud, CO Within a 39-mile radius
4 Facilities
From $20/mo
Storage units in Johnstown, CO Within a 39-mile radius
6 Facilities
From $39/mo
Storage units in Evans, CO Within a 43-mile radius
4 Facilities
From $40/mo
Storage units in Windsor, CO Within a 50-mile radius
5 Facilities
From $56/mo

Check out storage units in trending cities

If you want to see how your city compares to others, you can start by checking out other facilities in trending cities. A wide array of storage units can be leased in Colorado Springs, CO, Aurora, CO and Fort Collins, CO, where sizes and amenities may vary. Monthly rents for units in these cities are as low as $10, $22 and $30, respectively.

Storage units in Aurora, CO
39 Facilities
From $22/mo
Storage units in Fort Collins, CO
26 Facilities
From $30/mo
Storage units in Lakewood, CO
13 Facilities
From $22/mo
Storage units in Thornton, CO
11 Facilities
From $27/mo
Storage units in Arvada, CO
20 Facilities
From $32/mo
Storage units in Westminster, CO
5 Facilities
From $22/mo
Storage units in Pueblo, CO
33 Facilities
From $39/mo
Storage units in Greeley, CO
16 Facilities
From $36/mo
Storage units in Centennial, CO
6 Facilities
From $23/mo
Storage units in Boulder, CO
7 Facilities
From $24/mo
Storage units in Longmont, CO
15 Facilities
From $29/mo
Storage units in Castle Rock, CO
8 Facilities
From $36/mo
Storage units in Loveland, CO
17 Facilities
From $21/mo
Storage units in Broomfield, CO
9 Facilities
From $24/mo
Storage units in Parker, CO
8 Facilities
From $20/mo
Storage units in Littleton, CO
29 Facilities
From $25/mo
Storage units in Brighton, CO
8 Facilities
From $12/mo
Browse storage units in all Colorado cities.

Frequently Asked Questions

Storage units available at Mini U Storage - 3900 East 45th Avenue include the following amenities: Drive-Up Access, Retail Available, Onsite Manager, Truck Rentals, Security Camera, Gate, Parking, Credit Cards Accepted, First Floor Access and Online Payment. Depending on what you need to put away in storage, you can discover there are some things you absolutely need, so make sure you check with the facility manager that you'll find everything you need on site.

This particular storage facility provides self storage units of different sizes, ranging from 30 to 400 square feet. Space is not an issue! If you have more belongings to store, or simply bulkier items or even vehicles, you should go for larger storage units.

You already know how much stuff you need to put in self storage, so figuring out the unit size you need is the next step. Smaller units such as 5'x5' or 5'x10' spaces can usually be filled with the amount of items you would normally store in a closet: a few chairs and lamps, sports equipment, garden tools and some boxes.

Moving on to larger sizes, imagine the 10'x10' and 10'x15' units as similar to a bedroom or a living room – larger pieces of furniture, sturdier equipment and bicycles can fit here. Finally, a 10'x20' unit has enough space for the contents of a 3-bedroom house, while the larger 10'x30' space easily accommodates the contents of a loaded semi-truck.

Monthly prices for units offered by Mini U Storage - 3900 East 45th Avenue start from $87 and can go up to $483 for larger spaces.

Accessibility and quickness are key when it comes to storage, so drive-up storage units are generally regarded as very convenient. Pull your car right up to your storage space, load, unload, and you're good to go! However, if you're mostly storing temperature-sensitive items, you should rather consider indoor storage units.

Climate-controlled units maintain consistent temperatures and humidity levels all year round, making them perfect for all your sensitive items. Moisture and varying temperatures can damage a whole host of things, and that is why a lot of people choose to use climate-controlled units to store items like wooden furniture, electronics, artwork, documents and photographs, collectibles, antiques, etc. If the belongings you're storing are important to you, you should consider renting a climate-controlled unit.