Self-storage Units in Longmont, CO at Castle Keep Storage

Reserve your self-storage unit today! Castle Keep Storage is one of our premier storage facilities in Longmont, CO that offer clean, dry and secure self-storage units. We have multiple sized storage units for your personal storage and moving needs. Ask about climate controlled self-storage units which may be available, priced at some of the lowest storage unit prices on the market.

Storage facilities hours are subject to change however many of our self-storage facilities are open 24hrs and have extended access hours. Depending on your storage need and location, ask about RV storage, boat storage, vehicle self storage and motorcycle storage in Longmont, CO, 80503. Our U-Box portable storage may be a great fit for your moving and storage needs, ask us how we can help!

  • Drive-Up Access
  • Fenced/Walled Perimeter
  • Ground Level Access
  • We do not honor U-Haul 1 month FREE storage coupons
View all features
  • Low cost insurance available
  • Online payments
  • RV/Boat Storage
  • Vehicle Storage
  • Short and long term rentals
  • Total account management
  • Carts and dollies
  • Electronic Gate Access
  • Video Surveillance
  • Boxes & moving supplies
  • U-Haul trucks & trailers

Available Rooms
(all room sizes are approximate)

(Not actual photo)

Outside Drive Up Storage

The quickest way to unload your possessions is to drive right up to the front door of your room. Wide driveways and well-lit exteriors offer both convenience and security.

  • 5' x 5' x 9'

    outside drive up storage roll-up door
    Miscellaneous storage (Up to 2 rooms)
    *All dimensions and sizes are approximate.

    $60.00
    per month

  • 5' x 10' x 9'

    outside drive up storage roll-up door
    1-2 Bedroom Home (Up to 1,200 sq. ft.)
    *All dimensions and sizes are approximate.

    $80.00
    per month

  • 10' x 10' x 9'

    outside drive up storage roll-up door
    2-3 Bedroom Home (1,200 - 1,600 sq. ft.)
    *All dimensions and sizes are approximate.

    $135.00
    per month

  • 10' x 15' x 9'

    outside drive up storage roll-up door
    2-3 Bedroom Home (1,600 - 2,000 sq. ft.)
    *All dimensions and sizes are approximate.

    $160.00
    per month

  • 10' x 20' x 9'

    outside drive up storage roll-up door
    4 Bedroom Home or larger (2,000 sq. ft. & above)
    *All dimensions and sizes are approximate.

    $195.00
    per month

U-Box® Containers for Moving and Storage

We deliver U-Box containers, you pack them up and we store them in our secure warehouse. Load at your own pace! Just give us a call when you want us to pick up or drop off your U-Boxes.

Learn more about U-Box storage containers
  • Five or more U-Boxes

    8' x 5 ' x 7.5'

    Portable storage container.


    per month

Customer Reviews

michael d on

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Stuff is very helpful and answered all my questions

Christopher M on

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Everything went exactly as planned. The staff is courteous and fast. A++++

Eleanor F on

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The owner of this facility met me on a Sunday afternoon and was so helpful in getting me moved in so easily! I appreciated his high level of efficiency and pleasantness. Thank you!

Kaleb S on

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We were informed of a closer storage near our home which was cheaper, great service!

Travis W on

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Facilities are clean. Walk up kiosk is very nice

Mitchell W on

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ck office hour are by appointment

Ellyn B on

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Facility was just what I needed, the manager was very nice and efficient.

Alisyn C on

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The gentleman who was working was very nice and helpful. The facility itself was easy to find, looked very secure, was clean, and well kept. So far, I`m very pleased with Castle Keep.

Dianne M on

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We had a personal family emergency that prevented us from moving at this time.Please refund deposit. We will rent from you in the near future

Ann E on

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Awesome people and place. Very quick response to my online reservation. Friendly, accomodating and very helpful.

Nathan B on

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Paul at Castle Keep was a huge help in getting my storage space setup. Excellent service.

Jennifer T on

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The people at the storage facility have been extremely nice and helpful. The unit was clean, and easy to access. However, Uhaul had promised that the second month would be free, which was not true.

nicole H on

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upon arrival, I was assigned a unit, which I could not get my car into, because of its location. I am in unit 224 now instead of 146

KELLY B on

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Good service