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Thornton Self Storage - 3685 East 121st Avenue, Thornton, CO 80241

Self Storage 25 - 375 Sq. Ft.
4/5 - 88 Reviews
Location:
3685 East 121st Avenue, Thornton, CO 80241
All units
Small
Medium
Large
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Units Availability
Small Storage Unit
5x15
Self Storage
75 Sq. Ft.
$124/mo
Small Storage Unit
5x10
Self Storage
50 Sq. Ft.
Climate-Controlled
$99/mo
Small Storage Unit
5x10
Self Storage
50 Sq. Ft.
$94/mo
Small Storage Unit
5x5
Self Storage
25 Sq. Ft.
Climate-Controlled
$64/mo
Small Storage Unit
5x5
Self Storage
25 Sq. Ft.
$59/mo
Medium Storage Unit
10x15
Self Storage
150 Sq. Ft.
$189/mo
Medium Storage Unit
10x10
Self Storage
100 Sq. Ft.
Climate-Controlled
$154/mo
Medium Storage Unit
10x10
Self Storage
100 Sq. Ft.
$149/mo
Medium Storage Unit
5x20
Self Storage
100 Sq. Ft.
$134/mo
Large Storage Unit
15x25
Self Storage
375 Sq. Ft.
$289/mo
Large Storage Unit
15x20
Self Storage
300 Sq. Ft.
$259/mo
Large Storage Unit
15x15
Self Storage
225 Sq. Ft.
$239/mo
Large Storage Unit
10x25
Self Storage
250 Sq. Ft.
$259/mo
Large Storage Unit
10x20
Self Storage
200 Sq. Ft.
$229/mo

Amenities

  • Climate-Controlled
  • Indoor
  • Drive-Up Access
  • Retail Available
  • Onsite Manager
  • Truck Rentals
  • Security Camera
  • Gate
  • Credit Cards Accepted

What customers are saying

4/5 - 88 Reviews

Read some helpful reviews of Thornton Self Storage at 3685 East 121st Avenue, shared by real renters with genuine experiences and honest opinions.

John M. - 29 September 2025
Worst place ever they took my money and then said they didn't ..plus they screwed up by giving me an indoor unit when I asked for a drive up. Plus the area on E. 121st Ave is really a shady place... because the area isn't the best place to go by yourself even during the daylight... I never used the facility because of the mistake of the inside unit, and they said they don't give refunds for any circumstances...what a crappy way of doing business...when they messed up!! ... Read more
Paula Y. - 4 January 2025
I run a local small business and I have had to make storage reservations as well as rent U-Hauls all over Thornton, Northglenn, Broomfield, Westminster etc - This is by far THE BEST location I work with. I highly recommend - John is very helpful and the owner Alex Is as well. Plus they have a cool shop inside. 5 of 5 good job ... Read more
Captain A. - 28 October 2024
This place will most likely try to scam you like they did with me. Be careful. Paid twice the amoumt I agreed upon, with a second charge a day later. There's so many U-Haul dealers! Go somewhere else !! ... Read more
Mike R. - 11 August 2024
Called to get an estimate for a 10x15 or 10x20 and the first person that answered phone was the most disrespectful person I have ever met and couldn’t figure out basic math and when asked for a manager he came up with 45 seconds worth of every reason to not place me on hold til a manager was available. Once I address again I wanted to speak to a manager I heard the first line person yelling and screaming at the manager about the situation and I address I wanted to make sure I had enough money available at the time the owner gave me rough estimate….. I’d never go threw the first person if it was the last storage place in Colorado ... Read more
Chris M. - 7 August 2024
Great storage for a reasonable price and convenient to rent and return the u-haul truck I used for the transition. Had to store my things for longer than expected, but that was no issue and I experienced no raise in rates while I needed my unit! ... Read more
Derek “. - 6 June 2024
Karen F. - 12 August 2023

Overview

Located at 3685 East 121st Avenue, this Thornton Self Storage facility provides convenient storage solutions in Thornton, Colorado. With small, medium, and large unit sizes available, this facility offers flexibility for a variety of storage needs, whether you're decluttering, moving, or storing business inventory.

This facility is well-equipped with climate-controlled units, ideal for protecting sensitive items like electronics, wooden furniture, or documents from Colorado’s fluctuating temperatures. For easy access, choose from indoor storage or drive-up access units that allow you to load and unload directly from your vehicle. Security is a top priority here, with features such as a gated entry, security cameras, and an onsite manager ensuring peace of mind.

For added convenience, this facility accepts credit card payments, has a retail shop for moving supplies, and even offers truck rentals to simplify your move. Perfect for both residential and business customers, this Thornton Self Storage location combines convenience, security, and flexibility for a seamless storage experience.

Storage units in nearby cities

Want to see how Thornton, CO, compares to other places? There are plenty of great options nearby. Northglenn, CO, 3 miles away, has 3 self storage facilities with rents starting from $51/month. Or you could drive to Federal Heights, CO, just 6 miles distant to find other options, where the cheapest units in the 4 facilities there can be rented for $15/month. In Broomfield, CO, just 7 miles away, there are 9 facilities available, offering rents as low as $24/month. Further out, Commerce City, CO (8 miles away), and Erie, CO (10 miles away), have 6 and 9 facilities, with minimum rents of $57 and $35, respectively.

Storage units in Northglenn, CO Within a 3-mile radius
3 Facilities
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Storage units in Federal Heights, CO Within a 6-mile radius
4 Facilities
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Storage units in Broomfield, CO Within a 7-mile radius
9 Facilities
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Storage units in Commerce City, CO Within a 8-mile radius
6 Facilities
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Storage units in Erie, CO Within a 10-mile radius
9 Facilities
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Storage units in Lafayette, CO Within a 10-mile radius
2 Facilities
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Storage units in Brighton, CO Within a 10-mile radius
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Storage units in Louisville, CO Within a 11-mile radius
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Storage units in Superior, CO Within a 12-mile radius
1 Facility
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Storage units in Wheat Ridge, CO Within a 14-mile radius
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Storage units in Glendale, CO Within a 16-mile radius
1 Facility
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Storage units in Boulder, CO Within a 18-mile radius
7 Facilities
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Storage units in Longmont, CO Within a 19-mile radius
15 Facilities
From $30/mo
Storage units in Sheridan, CO Within a 20-mile radius
3 Facilities
From $60/mo
Storage units in Golden, CO Within a 21-mile radius
6 Facilities
From $40/mo
Storage units in Greenwood Village, CO Within a 22-mile radius
1 Facility
From $42/mo
Storage units in Englewood, CO Within a 22-mile radius
14 Facilities
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Storage units in Platteville, CO Within a 23-mile radius
1 Facility
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Storage units in Ken Caryl, CO Within a 26-mile radius
5 Facilities
From $30/mo
Storage units in Berthoud, CO Within a 27-mile radius
4 Facilities
From $28/mo

Check out storage units in trending cities

Still looking for the ideal storage unit? For more great self storage options you wouldn't have to cross the state border: units can be leased in Denver, CO and Colorado Springs, CO, starting from $12 and $9, respectively. Even more storage is available and with low starting rents, in Aurora, CO ($20), Fort Collins, CO ($29) and Lakewood, CO ($20).

Storage units in Denver, CO
59 Facilities
From $12/mo
Storage units in Aurora, CO
39 Facilities
From $20/mo
Storage units in Fort Collins, CO
26 Facilities
From $29/mo
Storage units in Lakewood, CO
13 Facilities
From $20/mo
Storage units in Arvada, CO
20 Facilities
From $24/mo
Storage units in Westminster, CO
5 Facilities
From $16/mo
Storage units in Pueblo, CO
33 Facilities
From $34/mo
Storage units in Greeley, CO
16 Facilities
From $36/mo
Storage units in Centennial, CO
6 Facilities
From $32/mo
Browse storage units in all Colorado cities.

Frequently Asked Questions

There is a wide array of amenities available for the storage units that Thornton Self Storage - 3685 East 121st Avenue has to offer. These amenities include Climate-Controlled, Indoor, Drive-Up Access, Retail Available, Onsite Manager, Truck Rentals, Security Camera, Gate and Credit Cards Accepted. Most of these amenities can prove to be very useful depending on what you need to store. For example, climate-controlled units can come in handy for keeping sensitive items, drive-up access can make your loading and unloading process easier, and extra security measures will ensure your items are kept safe at all times.

The storage units offered by Thornton Self Storage - 3685 East 121st Avenue can satisfy all of your storage needs. Different sizes here range from 25 to 375 square feet. You can go for smaller units if you don't have a lot of items to store, while choosing a larger space is recommended in case you need to store a lot of furniture, bigger items or even vehicles.

The unit size that you should choose obviously depends on how much stuff you need to store. On the one hand, you should think of smaller units (5'x5' or 5'x10') as closets – they can be used to store chairs, lamps, moving boxes and sports equipment, along with smaller pieces of furniture, books and documents.

On the other hand, the 10'x10' and 10'x15' spaces are good for storing larger items of furniture, bicycles and a larger number of possessions. If you need even more space, then 10'x20' and 10'x30' units can easily accommodate the contents of an entire 3- or 4-bedroom house.

Storage units offered by Thornton Self Storage - 3685 East 121st Avenue come at a variety of prices, starting from $59 per month for typically smaller units. However, larger spaces can set you back up to $289 a month.

We know that when it comes to self storage, there is nothing more important than quickness and accessibility. Drive-up access is an extremely convenient amenity, as you can park your vehicle right next to your unit, making it significantly easier to load and unload the items you will use storage for. However, drive-up storage units tend to be outdoors, so you might consider indoor storage spaces with climate control if you're looking to keep temperature-sensitive items in peak condition.

Yes, you might, depending on what you need to put in storage. Climate-controlled spaces keep temperatures and humidity levels consistent all the time, which means they are perfect for storing sensitive items. Seeing that a whole host of things can be damaged by varying temperatures and excessive moisture, many people choose to rent climate-controlled units for personal items such as documents, photographs, paintings, collectibles, electronics, wooden furniture, antiques and even vehicles. If you're looking to store such items that are valuable to you, consider renting a climate-controlled unit!