Clean, covered, and secure indoor storage – right when you need it.
At Cornerstone Self Storage, our indoor storage units offer a practical solution for storing furniture, household goods, business inventory, seasonal items, and more. Whether you’re moving, decluttering, or just short on space, our clean and covered units keep your belongings safe and organized.
Why Choose Our Indoor Self Storage?
All of our indoor units are located at ground level inside a clean, well-maintained building—providing added protection from:
- ❄️ Snow and ice
- 🌧️ Rain and moisture
- ☀️ Direct sunlight
- 🐜 Pests and rodents (seasonal pest control included)
In winter, we clear snow in front of every unit door after each snowfall—so you’re never left digging to get inside.
Secure, Convenient, & Local
We’re a family-owned storage facility serving Sartell, Minnesota with pride. Our location just off Highway 10 features:
- 24/7 HD video surveillance
- Bright LED lighting
- Gated access
- Optional tenant insurance
- Friendly, responsive local support
Flexible & Transparent Pricing
- Month-to-month leases—no long-term commitment
- Online reservations and automatic payments
- No hidden fees or rate hikes—you’ll always pay the same as new customers renting the same unit type.
⭐ What Our Customers Say
“Super clean units, helpful staff, and no price games. Best place I’ve rented from!”
— Five-Star Google Review from Sue J
“Love the snow removal! Always easy to get in during winter.”
— Five-Star Google Review from Franky
📞 Call 320-250-8588 or check availability here on our website to reserve your indoor storage unit today.
Contact Cornerstone Self Storage Today!
FAQs About Indoor Storage
Winters in our region are long and brutal, so when you need a safe place to store your belongings, it’s important to find a facility that offers indoor storage solutions. At Cornerstone Self Storage, we provide a wide range of indoor units that are built to shield your items from the elements year-round. Whether you’re storing furniture, seasonal items, or anything in between, we’re here to make it easy.
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What sizes of indoor storage units do you have available?
Our indoor units range from 10×10 to 12x42x14. We also have 10×20, 10×24, 10×30, 10×40, 12×15, 12×25, and 12×40 options to perfectly suit your unique storage needs.
Are your indoor units protected from pests?
Absolutely. We take pride in maintaining a clean, well-lit, and secure facility, and pest management is a crucial part of our maintenance routine.
How do you handle snow removal in winter?
We know that getting to your unit in the middle of a Minnesota winter can be a challenge, so we make it a priority to clear snow in front of every unit door after each snowfall. We’ll ensure that you can easily access your belongings, no matter the season.
Is there lighting inside the storage facility?
Yes, our facility is equipped with bright LED lighting throughout, so visibility is never an issue when you’re loading or unloading. Our extra-large 12x42x14 storage option also includes a light inside the unit itself.
Are there any hidden fees I should know about?
Nope! There are no hidden fees, contracts, surprise rate hikes, or other gimmicks. You pay your monthly rent plus a one-time admin fee when you first sign up (which covers your combination lock), and rent will remain consistent from month to month.
Contact Cornerstone Self Storage Today!
At Cornerstone Self Storage, we offer indoor storage solutions for those in Sauk Rapids, Sartell, and St. Cloud, Minnesota.
10x10
Ground floor drive-up
Door 9’Wx8’H
$45/Month
$90
50% off First 2 Months
This unit is roughly half the size of a standard one-car garage. It can hold the content of two bedrooms or an entire living room.
10x20
Ground floor drive-up
Door 9’Wx8’H
$55/month
$110
50% off First 2 Months
This unit is the size of a standard one-car garage. It can store and hold a three bedroom house.
10x24
Ground floor drive-up
Door 9’Wx8’H
$65/month
$130
50% off First 2 Months
This unit can store a fully furnished three bedroom home, a small RV, or a boat.
10x30
Ground floor drive-up
Door 9’Wx8’H
$150/month
This unit is similar to the space of a one-and-a-half-car garage. You could store a full house in this unit!
10x40
Ground floor drive-up
Pass Thru – A door on each end
Door 9’Wx8’H
$220/month
It can hold the contents of a large 4-5 bedroom house, including multiple rooms of furniture, large appliances, and even some recreational vehicles or small boats.
12x15
Ground floor drive up
Door 10’W x 8’H
$100/month
12x25
Ground floor drive up
Door 10’W x 8’H
$165/month
Perfect for a Boat –
It can handle the furnishings of a two bedroom apartment
12x40
Ground floor drive-up
Pass Thru – A door on each end
Doors 10’W x 8’H
$260/month
Great for Personal Storage or Commercial Storage
Extra Large Inside Storage (12x42x14)
Ground floor drive up
Door 10.6’W x 14’H
Electricity included in rent
Light inside unit
$295/month
Great for RV, Commerical Storage or if you need lots of storage space
Outside Storage
Outside Storage Space.
One Unit Up to 40Ft