Selected:
All
small
5 x 10
It fits furnishings of a mid-sized bedroom, including a queen-sized bed, a dresser, a TV and several small to medium-sized boxes. Door Size is 4'W x 8'H
$
64.00
per month
medium
10 x 10
100 SQ FT
It fits the contents of two full bedrooms, including several small to medium-sized boxes, and items such as mattress sets, sofas, chests of drawers, bookcases, and desks.
$
81.00
per month
10 x 15
150 SQ FT
It fits the contents of an entire family room including several small to medium-sized boxes, and items such as mattress sets, sofas, chests of drawers, bookcases, and desks.
$
98.00
per month
large
10 x 20
200 SQ FT
It fits the contents of an entire family room and two full bedrooms, including several small to medium-sized boxes.
$
115.00
per month
12 x 20
It fits the contents of an entire family room and two full bedrooms, including several small to medium-sized boxes.
$
146.00
per month
12 x 25
Ideal for small businesses, hobbyists, or anyone with substantial storage needs, our 12x25 storage units offer 300 square feet of space, equivalent to a large one-car garage. These units are perfect for storing the contents of a multi-bedroom home, large furniture, or even small vehicles and boats. Whether you're looking to store inventory, hobby equipment, or personal belongings, our 12x25 units provide the versatility and room you need to keep everything safe and organized.
$
165.00
per month
12 x 25
Ideal for small businesses, hobbyists, or anyone with substantial storage needs, our 12x25 storage units offer 300 square feet of space with lights and power, equivalent to a large one-car garage. These units are perfect for storing the contents of a multi-bedroom home, large furniture, or even small vehicles and boats. Whether you're looking to store inventory, hobby equipment, or personal belongings, our 12x25 units provide the versatility and room you need to keep everything safe and organized.
$
175.00
per month
xlarge
12 x 30
Our spacious 12x30 storage units provide an ideal solution for those needing to store the contents of a multi-bedroom home. Equipped with motion sensor lighting inside the unit and an outlet for trickle chargers, these units offer convenience and accessibility. The 12x30 size is perfect for accommodating oversized items such as a couch, refrigerator, washer/dryer, and a dining room set, as well as several large boxes. Whether you're moving or simply need extra space, our units ensure your belongings are safely stored with ease.
$
209.00
per month
12 x 50
600 Sq Ft Drive Through Unit with Motion Senser Lights and Outlets
$
300.00
per month
12 x 60
This 12x60 Storage Unit Features 4 Motion Sensor Lights, 2 Outlets and A Door On Each Side Of The Unit.
$
330.00
per month
parking
14 x 50
14x50 700 SQFT HEATED Storage Units – Built for your lifestyle & business needs!
- Fully insulated & powered
- XL drive aisles – Easy access for RVs, boats & trailers
- Perfect for small businesses needing extra space
- No long-term lease – Month-to-month flexibility!
$
600.00
per month
14 x 50
RV Unit 700 SQ FT With Outlet,Lights, Power Overhead Door
$
365.00
per month
20 x 50
20x50 1000 SQFT HEATED Storage Units – Built for your lifestyle & business needs!
- Fully insulated & powered
- XL drive aisles – Easy access for RVs, boats & trailers
- Perfect for small businesses needing extra space
- No long-term lease – Month-to-month flexibility!
(Gas and Power will need to be put in Tenants Name)
$
900.00
per month
small
5 x 10
It fits furnishings of a mid-sized bedroom, including a queen-sized bed, a dresser, a TV and several small to medium-sized boxes. Door Size is 4'W x 8'H
$
64.00
per month
medium
10 x 10
100 SQ FT
It fits the contents of two full bedrooms, including several small to medium-sized boxes, and items such as mattress sets, sofas, chests of drawers, bookcases, and desks.
$
81.00
per month
10 x 15
150 SQ FT
It fits the contents of an entire family room including several small to medium-sized boxes, and items such as mattress sets, sofas, chests of drawers, bookcases, and desks.
$
98.00
per month
large
10 x 20
200 SQ FT
It fits the contents of an entire family room and two full bedrooms, including several small to medium-sized boxes.
$
115.00
per month
12 x 20
It fits the contents of an entire family room and two full bedrooms, including several small to medium-sized boxes.
$
146.00
per month
12 x 25
Ideal for small businesses, hobbyists, or anyone with substantial storage needs, our 12x25 storage units offer 300 square feet of space, equivalent to a large one-car garage. These units are perfect for storing the contents of a multi-bedroom home, large furniture, or even small vehicles and boats. Whether you're looking to store inventory, hobby equipment, or personal belongings, our 12x25 units provide the versatility and room you need to keep everything safe and organized.
$
165.00
per month
12 x 25
Ideal for small businesses, hobbyists, or anyone with substantial storage needs, our 12x25 storage units offer 300 square feet of space with lights and power, equivalent to a large one-car garage. These units are perfect for storing the contents of a multi-bedroom home, large furniture, or even small vehicles and boats. Whether you're looking to store inventory, hobby equipment, or personal belongings, our 12x25 units provide the versatility and room you need to keep everything safe and organized.
$
175.00
per month
xlarge
12 x 30
Our spacious 12x30 storage units provide an ideal solution for those needing to store the contents of a multi-bedroom home. Equipped with motion sensor lighting inside the unit and an outlet for trickle chargers, these units offer convenience and accessibility. The 12x30 size is perfect for accommodating oversized items such as a couch, refrigerator, washer/dryer, and a dining room set, as well as several large boxes. Whether you're moving or simply need extra space, our units ensure your belongings are safely stored with ease.
$
209.00
per month
12 x 50
600 Sq Ft Drive Through Unit with Motion Senser Lights and Outlets
$
300.00
per month
12 x 60
This 12x60 Storage Unit Features 4 Motion Sensor Lights, 2 Outlets and A Door On Each Side Of The Unit.
$
330.00
per month
parking
14 x 50
14x50 700 SQFT HEATED Storage Units – Built for your lifestyle & business needs!
- Fully insulated & powered
- XL drive aisles – Easy access for RVs, boats & trailers
- Perfect for small businesses needing extra space
- No long-term lease – Month-to-month flexibility!
$
600.00
per month
14 x 50
RV Unit 700 SQ FT With Outlet,Lights, Power Overhead Door
$
365.00
per month
20 x 50
20x50 1000 SQFT HEATED Storage Units – Built for your lifestyle & business needs!
- Fully insulated & powered
- XL drive aisles – Easy access for RVs, boats & trailers
- Perfect for small businesses needing extra space
- No long-term lease – Month-to-month flexibility!
(Gas and Power will need to be put in Tenants Name)
$
900.00
per month
Why Choose B-21 Self Storage in Box Elder, South Dakota?
Every unit is secured with gated access, bright lighting, and modern surveillance so you can store with confidence. Located just off I-90 near Ellsworth Air Force Base, our storage solutions are convenient for military families, Rapid City commuters, and local residents. From household storage to business inventory, B-21 Self Storage delivers secure, accessible, and affordable options close to home.
Added Value
- Month to Month Rentals
- Military Discounts
Accessibility
- 365 Gate Access
- Moving Carts and Dollies
- Wide Aisles for Large Trucks
Storage Units
- Drive-Up Storage
- Extra High Ceilings
- Extra Large Doors
Security
- Video Cameras
- Keypad Access
- Electric Gate
- Fully Fence Property
Vehicle Storage
- Uncovered Car Storage
- Enclosed Car Storage
Business
- Deliveries Accepted
Storage For Rent in Box Elder, SD – Near Rapid City & Ellsworth Air Force Base
Whether you’re relocating with the Air Force, decluttering your home, or need extra space for your business, B21 Storage has you covered. Our facility offers drive-up access, climate-controlled options, and a range of unit sizes designed for real life. With easy access to Rapid City and the Black Hills, plus flexible month-to-month rentals, storing your belongings has never been easier—or closer to home.
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B-21 Storage
2120 N Elk Vale Rd, Box Elder, SD 57719
Office Hours
Sunday
:
Closed
Monday
:
10 AM to 3 PM
Tuesday
:
10 AM to 3 PM
Wednesday
:
10 AM to 3 PM
Thursday
:
10 AM to 3 PM
Friday
:
10 AM to 3 PM
Saturday
:
Closed
Gate Access
Daily
:
24 Hours
“Cleanest units ive ever rented from and great pricing feels safe to store my products here and other house overflow items”
– Thor Bragg
“Great clean facility. Staff are super friendly and helpful. I Never have to worry if my trailers are being messed with, and always feel that my property is secure with them. Best storage facility I’ve ever used by far!”
– Darren Cundall
“Nice new and clean modern facility. James the owner/manager is great to work with and we LOVE his dog Dixie! The prices are reasonable and competitive. Good location right off the interstate and near the suburban commercial shopping district.”
– Roy Munson
“Always great experiences with James. I couldnt remember my lock comno and he got it for me immediately. Love this storage place. Clean and friendly.”