Storage Unit Sizes: Complete Guide to Choosing the Right Fit |
| STORAGE UNITS SIZE
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Storage units range from 5x5 (25 sq ft) to 10x30 (300 sq ft). Learn what fits in each size, compare dimensions, and find the right unit for your needs.
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S torage units range from 5x5 feet (25 square feet) to 10x30 feet (300 square feet), with the most popular size being 10x10 feet (100 square feet). A 5x5 unit holds closet contents and seasonal items, a 10x10 fits a one-bedroom apartment, and a 10x20 accommodates a three-bedroom home or vehicle storage.
| Key Points: | |
|---|---|
| • | Standard sizes include 5x5, 5x10, 10x10, 10x15, 10x20, and 10x30 feet |
| • | The 10x10 unit (100 sq ft) is the most commonly rented size nationwide |
| • | Prices range from $50 to $300+ monthly depending on size and climate control |
| • | Always leave a 2-foot center aisle for access when loading your unit |
| • | Climate-controlled units cost 25-50% more but protect temperature-sensitive items |
Complete Storage Unit Size Chart
Understanding storage dimensions helps you avoid paying for unused space or cramming belongings into a unit that is too small. According to the Self Storage Association , the average American renter underestimates their storage needs by approximately 20%, leading to either multiple moves or wasted monthly fees.
| Unit Size | Square Feet | Comparable To | Best For |
|---|---|---|---|
| 5x5 | 25 sq ft | Small walk-in closet | Boxes, seasonal decor, small furniture |
| 5x10 | 50 sq ft | Walk-in closet or small shed | Studio apartment, mattress set, dresser |
| 10x10 | 100 sq ft | Half a one-car garage | One-bedroom apartment contents |
| 10x15 | 150 sq ft | Large bedroom | Two-bedroom apartment or home |
| 10x20 | 200 sq ft | One-car garage | Three-bedroom home, vehicle storage |
| 10x30 | 300 sq ft | One-and-a-half car garage | Large home, multiple vehicles, business inventory |
Most facilities maintain 8-foot ceilings, giving you vertical stacking space. A 10x10 unit with standard ceiling height provides approximately 800 cubic feet of storage capacity when properly organized.
How Big Is a 10x10 Storage Unit?
A 10x10 storage unit measures exactly 10 feet wide by 10 feet deep, totaling 100 square feet of floor space. This size represents the industry standard and accounts for roughly 30% of all storage rentals according to Extra Space Storage industry data.
In practical terms, a 10x10 unit holds the contents of a typical one-bedroom apartment: a queen-size bed frame and mattress, a dresser, a small dining set, a couch, several boxes, and miscellaneous items. You can fit approximately 3-4 rooms of furniture when using vertical space efficiently.
Are 10x10 storage units actually 10x10? Interior dimensions may vary by 2-6 inches due to wall thickness and construction methods. A unit advertised as 10x10 typically measures 9 feet 6 inches to 9 feet 10 inches on each interior wall. Always verify exact dimensions before signing a lease if precise measurements matter for your needs.
What Fits in Each Storage Unit Size
5x5 Storage Unit (25 Square Feet)
The 5x5 unit functions like a large closet. This size accommodates 10-15 medium moving boxes, a twin mattress set, small bookcases, outdoor chairs, seasonal decorations, and sports equipment. Western Colorado University students often find this size ideal for summer storage of dorm room essentials.
At Discount Self Storage locations in Gunnison and Crested Butte, 5x5 units start at $95 per month for interior upstairs units. These work well for ski gear, camping equipment, and off-season clothing that mountain residents rotate throughout the year.
5x10 Storage Unit (50 Square Feet)
A 5x10 unit equals a standard walk-in closet or small garden shed. This size holds a studio apartment's contents: a mattress set, small sofa or loveseat, dresser, desk, and 20-25 boxes. The narrow footprint (5 feet wide) means items stack along the walls with a center walkway.
The 5x10 vs 10x5 storage unit question comes up frequently. Both provide 50 square feet, but layout differs significantly. A 5x10 (narrow and deep) works better for long items like skis, lumber, or kayaks. A 10x5 (wide and shallow) offers easier access to all contents without climbing over boxes.
10x10 Storage Unit (100 Square Feet)
The 10x10 remains the most versatile and popular choice. This size accommodates a complete one-bedroom apartment: living room furniture, bedroom set, kitchen appliances, and 30-40 boxes. Small business owners use 10x10 units for inventory, equipment, and document storage.
A 10x10 unit price typically ranges from $100 to $250 monthly depending on location, climate control, and facility features. In the Gunnison Valley, Discount Self Storage offers 10x10 units from $229 to $337 per month, with climate-controlled options at Slate River Storage in Crested Butte.
10x15 Storage Unit (150 Square Feet)
The 10x15 bridges the gap between apartment and house storage. This size fits contents from a two-bedroom home: full bedroom sets, a sectional sofa, dining room furniture, washer and dryer, and 40-50 boxes. Contractors use this size for tools, materials, and equipment that do not fit in work vehicles.
10x20 Storage Unit (200 Square Feet)
A 10x20 equals a standard one-car garage. This size stores a three-bedroom home's contents or provides vehicle storage for cars, trucks, motorcycles, and ATVs. The 20-foot depth accommodates most passenger vehicles with room remaining for boxes and furniture along the walls.
Drive-up 10x20 units at Elk Mountain Storage in downtown Crested Butte feature daily snow removal during winter months, making them practical for vehicle storage in Colorado's mountain climate.
10x30 and Larger Units (300+ Square Feet)
Units sized 10x30 and above serve large homes, business inventory, and oversized vehicles. A 10x30 holds contents from a four-bedroom house or provides space for RVs, boats, and trailers alongside household items.
For RV and boat storage in the Crested Butte area, units up to 19x35 feet (665 square feet) are available at select Discount Self Storage locations. These oversized units eliminate the 30-minute drive to Gunnison for storing recreational vehicles.
What Can Fit in a 7x7 Storage Unit?
A 7x7 storage unit provides 49 square feet, nearly identical to a 5x10. This non-standard size holds a queen mattress set, small dresser, desk, chair, and approximately 15-20 boxes. The square shape offers slightly better maneuverability than the narrow 5x10 layout.
While 7x7 units are less common than standard sizes, they appear at some facilities as converted spaces or specialty units. If choosing between a 7x7 and a 5x10, consider whether the square or rectangular layout better suits your items.
How Much Can a 20x20 Storage Unit Hold?
A 20x20 storage unit provides 400 square feet, equivalent to a two-car garage. This size accommodates a five-bedroom home's complete contents, including major appliances, multiple bedroom sets, living and dining room furniture, and 100+ boxes.
Business applications for 20x20 units include retail inventory storage, contractor equipment depots, and document archiving. At standard 8-foot ceiling height, a 20x20 unit offers 3,200 cubic feet of storage volume.
Climate-Controlled vs. Standard Storage Units
Climate-controlled units maintain temperatures between 55 and 80 degrees Fahrenheit year-round. Standard units experience temperature fluctuations matching outdoor conditions, which in Colorado can range from below zero to above 90 degrees Fahrenheit.
| Item Category | Climate Control Needed? | Why |
|---|---|---|
| Electronics | Yes | Condensation damages circuits |
| Wood furniture | Yes | Warping and cracking from humidity changes |
| Photographs and documents | Yes | Paper degrades in heat and moisture |
| Metal tools | Optional | Rust prevention with proper preparation |
| Seasonal decorations | No | Most materials tolerate temperature swings |
| Camping and outdoor gear | No | Designed for outdoor conditions |
All units at Slate River Storage in Crested Butte are heated, protecting belongings through Colorado's harsh mountain winters where temperatures regularly drop below zero.
Drive-Up vs. Interior Storage Units
Drive-up units allow vehicle access directly to your unit door, similar to a garage. Interior units are located inside a building, accessed through hallways and sometimes elevators. Each type serves different storage needs.
Drive-up units work best for heavy items, frequent access, and vehicle storage. Loading furniture, appliances, and boxes directly from a truck bed saves significant time and physical effort. Interior units typically offer better climate control and security, making them ideal for sensitive items stored long-term.
Second-floor interior units cost less than ground-floor options at many facilities. If you are storing lightweight items like boxes, seasonal clothing, and small furniture, the savings may outweigh the inconvenience of stairs. Facilities like Discount Self Storage Riverland offer both interior upstairs and drive-up options to match different needs and budgets.
Storage Unit Pricing by Size
Storage costs vary significantly by location, unit type, and facility features. According to Neighbor.com market research, national average monthly rates in 2025 range from approximately $60 for a 5x5 to $200+ for a 10x20.
Climate-controlled units typically cost 25-50% more than standard units of the same size. A standard 10x10 averaging $125 monthly would cost $155-190 with climate control. Mountain communities and resort areas often price 10-30% above national averages due to limited supply and seasonal demand.
Price per square foot decreases as unit size increases. A 5x5 (25 sq ft) at $75 monthly costs $3.00 per square foot, while a 10x20 (200 sq ft) at $200 monthly costs $1.00 per square foot. Renting one larger unit often costs less than two smaller units with equivalent total space.
How to Choose the Right Storage Unit Size
Selecting the correct size requires an honest inventory of what you plan to store. The storage unit size guide from Discount Self Storage recommends listing major furniture pieces first, then estimating box quantities.
Step 1: Inventory large items. Count sofas, beds, dressers, tables, and appliances. Each major furniture piece requires roughly 15-25 square feet of floor space when accounting for irregular shapes and stacking limitations.
Step 2: Estimate box quantities. A typical bedroom generates 10-15 medium boxes. Kitchens produce 15-20 boxes. Home offices and garages vary widely based on accumulation habits.
Step 3: Add 20% buffer space. Leave room for a center aisle and access to items at the back. A completely packed unit becomes inaccessible and risks damage from items shifting.
Step 4: Consider access frequency. If you need regular access to stored items, choose a slightly larger unit that allows walkways and organization. Long-term storage with rare access can be packed more densely.
RV, Boat, and Vehicle Storage Sizes
Vehicle storage requires precise measurements. Standard parking spaces measure 9x18 feet, but RVs, boats, and trailers need significantly more room. Measure your vehicle's length, width, and height before selecting a storage space.
Compact cars fit in 10x15 units. Sedans, small SUVs, and trucks require 10x20 minimum. Full-size trucks, large SUVs, and small boats need 10x25 or 10x30 spaces. RVs and larger boats often require outdoor parking or oversized enclosed units up to 15x40 feet.
In the Gunnison Valley, six Discount Self Storage facilities offer vehicle storage options ranging from standard 10x20 drive-up units to oversized 19x35 spaces for RVs and boats. Outdoor parking is available at the North, Airport, Crested Butte, and Riverland locations.
Business Storage Size Requirements
Small businesses use self-storage for inventory, equipment, documents, and seasonal merchandise. According to Personal Warehouse , approximately 15% of storage unit renters are commercial customers.
A 10x10 unit holds 50-75 medium boxes of documents or approximately $5,000-10,000 in retail inventory depending on product size. Contractors storing tools and equipment typically need 10x15 to 10x20 units. Landscaping and construction businesses with trailers and heavy equipment often require 10x30 or larger.
Business storage benefits from 24-hour access for early morning or late night inventory runs. All Discount Self Storage locations in Gunnison and Crested Butte provide 24-hour access with electronic gate entry, accommodating business schedules that do not fit standard office hours.
Frequently Asked Questions About Storage Unit Sizes
What size storage unit do I need for a one-bedroom apartment?
A 10x10 storage unit (100 square feet) fits most one-bedroom apartment contents. This includes a bed, dresser, small sofa, dining set, and 20-30 boxes. If you have minimal furniture, a 5x10 may suffice.
What size are most storage units?
The 10x10 is the most commonly rented storage unit size, followed by 5x10 and 10x20. These three sizes account for approximately 70% of all storage rentals nationwide.
Is a 5x10 storage unit big enough for a bed?
Yes, a 5x10 unit holds a queen or king mattress set, bed frame, and additional furniture or boxes. The 10-foot depth accommodates mattresses stored on their sides along the back wall.
How do I protect my belongings in storage?
Use sturdy boxes, wrap furniture in moving blankets, and avoid plastic covers that trap moisture. Consider tenant protection plans that cover losses from fire, water damage, burglary, and other incidents.
Should I get climate-controlled storage?
Choose climate control if storing electronics, wood furniture, photographs, documents, musical instruments, or items sensitive to temperature extremes. Standard units work fine for outdoor gear, metal tools, seasonal decorations, and durable household items.
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