Affordable, Secure, and Always Accessible Storage for Your Home, Toys & Business
Choose from a wide range of storage options, including indoor boat and RV storage, as well as spacious shop-style, heated 20×50 units. Our facility is conveniently located just off Interstate I-90 for easy access.
24/7 Self Storage in Box Elder, SD
B-21 Storage is your trusted storage solution in Box Elder, SD, where more space means more possibilities. Whether you're clearing out clutter, storing seasonal items, or protecting valuable belongings, we offer smart solutions designed to fit every lifestyle. Our climate-controlled units and secure indoor storage options make it easy to store with confidence year-round, while our convenient 24/7 access ensures your items are always within reach.
Exceptional Storage Solutions Designed for All Your Needs
Proudly serving Box Elder, Rapid City, Rapid Valley, and Black Hawk, SD, we provide convenient storage solutions for residents, businesses, ad outdoor enthusiasts. Our facility is just minutes from key landmarks, including Ellsworth Air Force Base, Mount Rushmore, The Black Hills, The Badlands, Western Dakota Technical College, and the South Dakota School of Mines & Technology, making it the perfect choice for secure, accessible storage.
24-Hour Access
Climate-Controlled Storage
Indoor RV/Boat/Vehicle Storage
Drive-Up Storage Units
Extra High Ceilings
On-Site Manager
Video Surveillance
Fully Fenced & Gated Premises
Keypad Gate Access
Clean, Well-Lit Facility
Wide Aisles for Large Trucks
Dollies & Handcarts Available
Business Deliveries Accepted
Affordable Rates
Month-to-Month Rentals
Military Discounts
Online Bill Pay & Rentals
Secure Indoor Boat, RV, and Vehicle Storage in the Black Hills
Need space for your big investments? We’ve got you covered. B-21 Storage specializes in indoor RV, boat, and vehicle parking, giving your recreational vehicles the protection they deserve from weather, wear, and theft. Enjoy peace of mind with our fenced and gated facility, advanced security cameras, and power-equipped units, perfect for those who expect more from their storage experience.
Convenient Drive-Up Storage Units
Convenience is key, and we’ve designed our facility to make storing simple from start to finish. With drive-up access, dollies and handcarts, and fast online bill pay, moving in and managing your unit is a breeze. Whether you're upgrading your space, relocating, or storing gear between adventures, B-21 Storage at 2120 N Elk Vale Rd, Box Elder, SD delivers clean, secure storage with unbeatable convenience.
More space. More security. More possibilities - only at B-21 Storage.
Trusted Customer Feedback
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Nikki Gast on 10/13/2025
Exceptional Experience — Clean, Safe, and Hassle-Free!
I couldn’t be more impressed with this storage facility. From the moment I arrived, it was clear how much pride the owners take in maintaining the property. The entire site is spotless — the units are clean, the grounds are well-kept, and everything feels organized and cared for.
James is incredibly responsive and genuinely invested in making the rental process smooth and stress-free. Any questions I had were answered quickly and thoroughly, which gave me total peace of mind.
Security is clearly a top priority here. The well-lit property, secure access, and overall sense of safety made me feel confident storing my belongings.
Renting a unit was quick and easy — I was able to complete all my documents quickly online. If you’re looking for a storage solution that’s clean, safe, and professionally managed, this is the place. Highly recommend!“
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Sanne Onestein on 09/15/2025
Nicest storage management I have ever encountered. I have had both regular and climate controlled here. Both were great!“
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brian buck on 09/04/2025
These guys are great. They keep a very clean and safe environment. I recommend this place to anyone looking for a storage place.