Whether you’re downsizing to a smaller home or residence, renovating, or needing extra space solutions, self-storage facilities offer several convenient options—and many top moving companies provide temporary and long-term storage. With so many storage unit sizes available, how do you navigate and determine which capacity is right for you? We answer all your questions about storage unit size below.

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Common Storage Unit Sizes

Storage units come in various sizes, from small 5-by-5-foot units to extra-large, 400-square-foot units. Choosing the right size will ensure you have enough room to store your belongings without paying for more space than you need. Here’s an overview of the most common sizes and what they’re used for (keep in mind that square footage may vary):

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Small Storage Units

A small storage unit is perfect if you only need to store a few items or the contents of a small space, such as a closet. Small storage units typically range from 5-by-5 to 5-by-10 feet.

5′ x 5′ Storage Units

This size storage unit can hold the contents of a walk-in closet or a few small pieces of furniture, such as a mattress or a stack of chairs. This size is ideal for temporarily storing a few items during a move or for storing seasonal items, such as sports equipment or holiday decorations.

5′ x 10′ Storage Units

This size storage unit has enough space to accommodate the contents of a single room. It is ideal for temporary storage during a move or renovation. This size unit can hold small furniture, such as a loveseat and a dresser, plus several boxes or bins of smaller items.

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Medium Storage Units

If you have a moderate number of belongings to store, opt for a medium-size storage unit. Medium storage units range from 10-by-10 to 10-by-15 feet and provide ample space for larger items, such as furniture and major appliances.

10′ x 10′ Storage Units

This size storage unit is a popular choice for those who need to store the contents of a two- to three-bedroom house. This size unit can hold larger items, such as a washer and dryer, a dining room set, and multiple boxes or bins of smaller items. It’s ideal for those who need extra space for short-term storage.

10′ x 15′ Storage Units

This size storage unit can accommodate the contents of a three-bedroom house. It can hold larger furniture, such as a sectional sofa, multiple mattress sets, and several boxes. It’s ideal for temporary storage during a move or multi-room renovation.

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Large Storage Units

If you have many items to store, such as the contents of a larger home, you’ll need a large storage unit. Large storage units range from 10-by-20 to 10-by-25 feet and have enough space for oversized furniture, large appliances, and even vehicles.

10′ x 20′ Storage Units

This size storage unit is ideal for those who need extra space for their belongings during a full-home renovation or who need to store a car. It can hold the contents of a four- to five-bedroom home, including large appliances and furniture. It can also store patio furniture, large tools, ATVs, and other recreational vehicles.

10′ x 25′ Storage Units

This storage unit resembles a large garage. It can also serve as inventory storage for a small business. This size unit can hold a vehicle or several large items, such as sectional couches or multiple beds, along with several boxes and bins.

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Extra-Large Storage Units

Extra-large storage units range from 10-by-30 to 20-by-20 feet—this size is impractical for most people with modest storage needs but perfect for those who need to store inventory or longer vehicles that will not fit in the 10-foot by 20-foot unit.

10′ x 30′ storage units

This storage unit is great for long-term business storage or short-term storage for the contents of a five-bedroom house. This unit can hold large furniture, such as sectional sofas and multiple bedroom sets, plus stacked boxes. This size is also ideal for boat or RV storage. You could also use this size unit as a workshop or studio space.

20′ x 20′ storage units

This storage unit is the largest standard size available and is best for those with unique storage requirements. This size unit can hold the contents of an oversized garage or a small business, making it an excellent commercial storage solution. Additionally, this unit size is perfect for those needing a large area for equipment, a studio, or a workshop.

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How To Choose the Right Size Storage Unit

To choose the right storage unit size for your needs, start by identifying the items you need to store. Measure each item’s length, width, and height, starting with the largest. Then, use those measurements to estimate the total square footage you need. 

Next, consider whether any items can be stacked to save space and adjust your estimate accordingly. Most storage units are 8 feet tall. The exception to this is for larger vehicles; in those instances, there may be a 10-foot ceiling. Using that vertical space will help you fit your stuff into a smaller, and therefore cheaper, space.

Finally, think about accessibility. If you plan to access the unit frequently, factor in extra space for aisles and pathways. Choose a size that will allow you to navigate the space and reach your belongings easily.
Consider oversized items like pianos. Consult a storage unit professional to properly guide you.

If you have already calculated what size moving truck you need, you can use that information to select a storage unit size. U-Haul, for instance, has an FAQ page for each storage unit size it offers based on what size moving truck you need. Other storage and moving companies include similar information in their storage unit size guides.

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How To Maximize Your Storage Space

Here are some storage tips and techniques that will help you make the most of your storage unit:

• Make use of vertical space: Use the full height of your storage unit by stacking boxes or bins or installing shelves or hanging racks.
• Pack and stack strategically: When placing and packing items in your storage unit, put larger and heavier items in the back and lighter items in the front. Similarly, stack lighter items on top of heavier ones. Store frequently used items toward the front for easy access. 
• Disassemble furniture: Save space by disassembling bed frames, tables, and other furniture and stacking the pieces on top of each other. Be sure to wrap the pieces in protective material to avoid damage.
• Use shelving and other organizational tools: Shelving units, plastic bins, and other organizational tools can help you make the most of your space. Be sure to label all of your bins and boxes so you can easily find what you’re looking for. Make sure to pack clothes appropriately to avoid damage from insects and climate.
• Get creative: Look for creative solutions to avoid wasted space. For example, you can hang bikes from the ceiling with hooks or pulleys and stand mattresses on their side to save floor space.

Make sure to read through any contracts and policies carefully before you begin filling your storage unit. Just as there are things that movers won’t move, storage facilities may place limits on what you can store and how you can use their units.

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Storage Unit Costs

Self-storage unit costs vary widely depending on several factors, including the location and unit size. For example, storage facilities located in metropolitan areas are typically more expensive than those located in suburban or rural areas. Climate-controlled units will also cost more; at least $25 to $50 more per month. Local supply, demand and availability affect prices, so you may see vastly different prices even from two facilities in the same city.

To give you a rough idea of costs, we gathered quotes and averaged them together in the chart below.

If you are renting a storage unit for an upcoming move, factor the cost into your overall moving budget and compare prices from multiple facilities. Many top long-distance moving companies have their own storage facilities, and some even include a free month of storage with certain moves. As you shop around for movers, ask each company about their storage options so you can compare prices and features.

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Our Conclusion

Choosing the right size storage unit and maximizing your storage space can significantly affect your storage and moving costs. Follow the tips in this guide to assess your storage needs and choose the best unit size. Remember to consider accessibility, climate control, and cost as you weigh your options. With the right organizational techniques, you can ensure that your belongings are easily accessible and secure for as long as you need them stored.

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FAQ About Storage Units

Can I change the size of my storage unit after I’ve rented it?

Yes, most storage facilities allow you to change the size of your storage unit after you’ve rented it. If your storage needs change, simply contact the facility and ask about transferring to a different unit.

How long can I rent a storage unit for?

You can rent a storage unit for as little as one month or as long as several years. Most storage facilities offer flexible rental agreements that allow you to rent on either a short- or long-term basis.

Are my items insured while in storage?

Your items may be insured while in storage. Some companies, such as U-Haul, require proof of insurance and offer affordable self-storage insurance through a third-party company. Your homeowners insurance may also cover your items through its off-premises personal property coverage.

Can I access my items in storage whenever I need to?

Many storage facilities offer 24/7 access, which means you can access your items in storage whenever you need to. However, access hours and policies may vary by company and location, so be sure to check with the facility before arriving.

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