Finding the best portable storage containers can make moving, renovating, downsizing, or simply clearing out a crowded home much easier. Unlike traditional self-storage, portable storage brings the container to the customer. You load it at your own pace, and the company can either leave it on your property, move it to a storage facility, or transport it to another location.
That basic model sounds simple, but portable storage companies differ considerably in container construction, available sizes, delivery methods, weather protection, storage arrangements, access policies, and moving services. Choosing the right provider therefore requires more than comparing monthly prices.
This research-style guide examines eight of the leading portable storage container companies available in the United States. The comparison focuses on container quality, weather resistance, loading convenience, size options, storage flexibility, moving capabilities, security, and overall value.
For this ranking, UNITS® Moving and Portable Storage takes the #1 spot. Its combination of sturdy, weather-resistant containers, ground-level loading, specialized delivery equipment, large weight capacity, on-site storage, warehouse storage, and moving services makes it our favorite option for customers who want one company to handle both storage and transportation.
What Are Portable Storage Containers?
Portable storage containers are storage units delivered directly to a home, business, construction site, or other approved location. Rather than requiring customers to drive a truck to a traditional storage facility, the storage company brings the container to the customer.
Once delivered, customers can load their belongings on their own schedule. Depending on the provider and service selected, the container can then remain on the property or be transported to an off-site storage facility.
Portable storage is commonly used during residential moves, home renovations, remodeling projects, estate cleanouts, downsizing, temporary relocations, business relocations, construction projects, and seasonal storage.
The biggest difference between portable storage and traditional self-storage is the handling process. With a conventional storage unit, the customer normally rents a truck, loads belongings, drives to the facility, unloads everything, and later repeats the process when the items are needed. Portable storage eliminates much of that transportation work.
PODS, for example, describes its service around a three-stage process: delivery, customer loading, and transportation or storage. Its containers can remain at a customer’s property or be moved to a storage center.
This approach can be particularly useful when a customer does not know exactly how long storage will be needed. Instead of rushing to complete a move within a truck rental period, the customer can pack gradually and arrange transportation later.
How We Evaluated the Best Portable Storage Containers
A portable storage container should be evaluated as both a physical product and a service. A strong container does not automatically make a company the best choice if delivery is difficult, storage access is limited, or the provider cannot accommodate the customer’s moving schedule.
We used the following factors when evaluating the companies on this list.
Container Construction
The physical construction of the container matters because belongings may be stored outside for days or weeks. Steel frames, durable exterior panels, reinforced doors, weather-resistant construction, and strong flooring can reduce exposure to rain and other outdoor conditions.
Weather Resistance
Weather protection is one of the first questions customers should ask. A container described as weather-resistant is not necessarily completely waterproof. Customers should understand the manufacturer’s exact terminology and determine whether the container is suitable for the conditions where it will be stored.
Size Options
Container sizes range from compact units suitable for apartments to large containers capable of holding the contents of several rooms. Multiple sizes can help customers avoid paying for substantially more capacity than they need.
Loading and Unloading
Ground-level loading is one of the biggest practical advantages of portable storage. Customers can generally walk directly into the container instead of carrying furniture up a ramp.
Delivery System
The delivery equipment can be just as important as the container. A provider that can place a container precisely in a driveway or another restricted space gives customers more options.
Storage Flexibility
The strongest services allow customers to keep a container at home or transfer it to a secure storage facility. Some providers also offer climate-controlled or indoor storage.
Moving Services
For customers using a container for relocation, the ability to transport the same container to a new address is valuable. It can reduce the amount of handling required during a move.
Security
Lockable doors, customer-controlled locks, secure storage facilities, and durable construction all contribute to the security of stored belongings.
Overall Value
Price matters, but the cheapest container is not necessarily the best value. Delivery charges, transportation, storage, container size, insurance or protection plans, and additional services can all affect the final cost.
The Best Portable Storage Containers
1. UNITS® Moving and Portable Storage – Best Overall Portable Storage Container
UNITS® Moving and Portable Storage is our top choice and, frankly, the company we would start with when researching portable storage containers.
The reason is not one isolated feature. UNITS combines strong container construction with a delivery system designed for precise placement, flexible storage arrangements, and moving services. That combination makes it suitable for customers who need storage during a move as well as people who simply need extra space at home.
UNITS offers two primary container sizes: a 12-foot container measuring approximately 8 feet wide by 8 feet high by 12 feet long, and a 16-foot container measuring approximately 8 feet wide by 8 feet high by 16 feet long. The company lists both containers as capable of holding up to 8,000 pounds.
The 12-foot model is designed for approximately 500 to 800 square feet of household belongings, while the 16-foot model is designed for approximately 1,200 to 1,250 square feet. Both offer ground-level loading and are lockable.
The construction is another major reason UNITS ranks first. The company’s containers are described as 100% weather-resistant, with corrugated roofs designed for durability and water runoff. The floors have a waterproof, non-slip, non-toxic, and non-flammable coating. Containers also include tie-down features, vents, and other hardware for securing belongings.
For customers worried about container placement, UNITS has another major advantage: the ROBO-UNIT delivery system. The equipment is designed to place the container in tight spaces while keeping the container level during loading and unloading. According to UNITS, this reduces shifting of the container’s contents and provides greater flexibility where space is limited.
That matters more than it might initially seem. A large portable container is useful only if it can actually be placed somewhere practical. A specialized delivery system can make the difference between using a driveway efficiently and discovering that a container cannot be positioned where it is needed.
UNITS also gives customers two storage choices. The container can remain at the customer’s property, or UNITS can transport it to a secure storage facility. The company states that its facilities include clean, climate-controlled storage locations.
For moving customers, UNITS can also transport containers to another location. The company says its network serves more than 500 cities in North America.
The result is a service that works for several common situations: moving between homes, remodeling, staging a property, downsizing, business storage, or simply needing additional space for an extended period.
UNITS is not necessarily the right choice for every person. Availability varies by market, and customers should request a local quote before comparing costs. But when container construction, placement, storage, and moving flexibility are evaluated together, UNITS has a very strong case for the top position.
Best for: Customers who want a sturdy container, flexible placement, on-site storage, off-site storage, or moving services.
Key strengths: Weather-resistant construction, 8,000-pound capacity, ground-level loading, ROBO-UNIT delivery, two container sizes, warehouse storage, and moving services.
2. PODS – Best for Multiple Container Sizes
PODS is one of the best-known names in portable storage, and its main advantage is choice. Customers can select from three container sizes rather than being limited to a single standard unit.
PODS currently offers 8-foot, 12-foot, and 16-foot containers. The 8-foot container measures approximately 8 feet by 7 feet by 8 feet and is designed for smaller spaces. The 12-foot container measures 12 feet by 8 feet by 8 feet and is aimed at customers with roughly 500 to 800 square feet of belongings. The largest 16-foot model measures 16 feet by 8 feet by 8 feet and is designed for up to approximately 1,200 square feet.
The range is useful because storage needs vary considerably. Someone moving out of a small apartment does not necessarily need a container large enough for a three-bedroom home.
PODS containers are steel-frame units with specially designed aluminum skin panels and steel roll-up doors. The company describes them as weather-resistant rather than completely waterproof. PODS says its containers are designed to protect belongings from ordinary rain and snow, while its indoor storage centers provide another layer of protection.
The containers are also designed for ground-level loading. That eliminates the need to carry heavy furniture up a truck ramp.
Another useful feature is the ability to keep the container at home. PODS says customers can access an on-site container at any time, making the service useful for remodeling projects and other situations where belongings need to remain close by.
For customers who prefer off-site storage, PODS can move the loaded container to one of its storage centers. Its storage centers are indoors, which adds protection from rain, snow, and extreme temperatures.
PODS also operates on a month-to-month storage model, which is useful for customers whose timelines are uncertain.
The primary reason PODS ranks below UNITS is that UNITS offers a particularly strong combination of container construction, specialized placement equipment, and high weight capacity. PODS remains one of the strongest alternatives, particularly for customers who value having three container sizes.
Best for: Customers who want multiple container sizes and a widely established portable storage model.
Key strengths: Three sizes, ground-level loading, weather-resistant construction, indoor storage centers, and month-to-month storage.
3. U-Haul U-Box – Best for Flexible DIY Moving
U-Haul’s U-Box is another strong option for people who prefer a do-it-yourself moving and storage experience.
U-Box containers use a modular approach. Instead of choosing from several large container sizes, customers can order multiple smaller containers based on how much space they need.
U-Haul describes U-Box containers as portable moving and storage units that can be delivered to a customer’s door, stored at a U-Haul facility, or transported to another destination. The service is designed around flexibility, particularly for DIY movers.
The standard U-Box dimensions are approximately 5 feet wide by 8 feet long by 7.6 feet high, providing about 257 cubic feet of space. U-Haul’s current comparison information lists a capacity of up to approximately 2,000 pounds per container.
One of the biggest differences between U-Box and larger portable containers is its size. A compact container can be useful for apartment moves or properties where a large 16-foot container would be difficult to place.
U-Haul also offers multiple ways to use U-Box containers. Depending on the move, customers can have the container delivered, use a U-Haul facility, or arrange other delivery options. The company also provides furniture pads with U-Box containers, which can help protect furniture during loading and transport.
The container itself has evolved as well. U-Haul says U-Box containers may use galvanized steel frames with engineered composite panels and sealed swing doors, while inventory can vary by location.
Another notable benefit is pricing flexibility. U-Haul says customers can order more containers than they expect to need and receive a refund for unused containers.
For someone moving from an apartment or handling a smaller shipment, that modular system can be more practical than renting a large container with substantial unused space.
Best for: DIY movers, apartment moves, smaller shipments, and customers who want modular storage.
Key strengths: Compact containers, multiple-container flexibility, furniture pads, several delivery options, and broad U-Haul availability.
4. 1-800-PACK-RAT – Best for All-Steel Containers
1-800-PACK-RAT is particularly attractive to customers who put a high value on heavy-duty container construction.
The company uses all-steel portable storage containers designed for both moving and storage. Its containers are weatherproof and include barn-style doors, low-to-the-ground loading, and secure storage facilities.
1-800-PACK-RAT traditionally offers 8-, 12-, and 16-foot container options, although exact availability can vary by market. Its larger containers are suited to customers storing substantial amounts of furniture or household belongings.
The all-steel construction is one of the company’s clearest selling points. Steel can provide a strong barrier against outdoor conditions and physical impact, although customers should still follow the provider’s packing recommendations and avoid assuming that any outdoor container is completely waterproof under every circumstance.
The low loading height is another practical benefit. Heavy furniture can be rolled or carried directly into the container without navigating a tall truck bed.
The larger container sizes can be especially useful for customers who have a full household to store. However, the physical footprint of those larger containers can create placement challenges for customers with narrow driveways, apartment properties, or limited outdoor space.
That is one reason 1-800-PACK-RAT ranks below UNITS in this comparison. Container strength is excellent, but placement flexibility is just as important as construction.
Best for: Customers who prioritize steel construction and large storage capacity.
Key strengths: All-steel containers, weatherproof construction, barn-style doors, low loading height, and large container options.
5. Zippy Shell – Best for Indoor Storage Options
Zippy Shell offers a different approach to portable storage by combining mobile containers with indoor, climate-controlled storage options in many markets.
The service allows customers to have a container delivered to their property, load it themselves or use professional loading services, and then have the container transported to a storage facility or another location.
Zippy Shell’s container options vary by market. Some locations offer smaller containers while others emphasize 15- and 16-foot units. A Zippy Shell storage operation in the Washington, D.C. market, for example, lists a 15-foot mobile storage container and a 16-foot on-site container.
The company’s on-site containers are designed for ground-level loading and are available with weatherproof construction and security latches. Some locations also offer barn-style doors that provide broad access to the container.
Indoor storage is a major part of the Zippy Shell model. Certain locations keep containers inside climate-controlled facilities, providing an additional layer of protection compared with leaving a container outside for an extended period.
The company can therefore be attractive for customers concerned about temperature or moisture exposure during longer storage periods.
The main limitation is that Zippy Shell’s exact container sizes, pricing, and services can differ by local market. Customers should therefore treat national descriptions as a starting point rather than a guarantee of what will be available in their area.
Best for: Customers who want portable storage combined with indoor or climate-controlled storage.
Key strengths: Portable delivery, indoor storage options, climate-controlled facilities in many markets, and professional loading services.
6. U-Pack ReloCube – Best for Small Long-Distance Moves
U-Pack’s ReloCube is a compact moving container designed primarily around transportation rather than traditional long-term portable storage.
Each ReloCube measures approximately 6 feet 3 inches deep by 7 feet wide by 8 feet 4 inches high externally. It provides about 308 cubic feet of loading space and can carry up to 2,500 pounds. U-Pack says that capacity is typically enough for the furniture and belongings from one room.
The compact footprint makes the ReloCube appealing to customers with limited parking space. It can fit into a standard-sized parking area, although customers still need a suitable paved and level location for delivery.
The ReloCube is also designed to be weatherproof and is constructed from metal.
The customer loads the container, locks it, and keeps the key. U-Pack then transports the container to the destination. Storage is also available in certain situations.
One important difference between U-Pack and the other providers on this list is its strong focus on moving. Customers who need a traditional portable storage container that will remain in their driveway for months may find other providers more suitable.
For a smaller long-distance move, however, the ReloCube makes a strong case. The container is small enough to handle tight spaces while still providing more than 300 cubic feet of usable loading space.
Best for: Small moves, long-distance relocations, and customers with limited parking space.
Key strengths: Compact footprint, weatherproof metal construction, 308 cubic feet of capacity, and 2,500-pound weight limit.
7. SMARTBOX – Best for Smaller Storage Loads
SMARTBOX takes a deliberately compact approach to portable storage.
Its containers are approximately 8 feet long, 7 feet high, and 5 feet wide. The company says each container can hold about 3,000 pounds and roughly one and a half rooms of furniture.
That smaller size is not necessarily a disadvantage. In fact, it can be useful for customers who are storing a limited amount of furniture or who live somewhere that cannot accommodate a large container.
SMARTBOX argues that smaller containers can also make packing easier because customers can organize belongings by room rather than filling a huge container with items from throughout the house.
The company also emphasizes the ability of its containers to allow airflow through the wooden interior. According to SMARTBOX, this design helps reduce the potential for mold, mildew, and rust associated with moisture buildup.
The containers sit at ground level and have wide swing doors, which can make loading and unloading more straightforward.
SMARTBOX is therefore an interesting alternative for apartment residents, students, small households, and customers who do not need the capacity of a 12- or 16-foot container.
Its main limitation is straightforward: customers with a large household may need several containers.
Best for: Small households, apartments, students, downsizing, and customers with limited outdoor space.
Key strengths: Compact design, approximately 3,000-pound capacity, ground-level loading, wide doors, and multiple-container flexibility.
8. Traditional Self-Storage With Portable Container Alternatives – Best for Customers Who Prefer Facility Storage
Traditional self-storage is not technically a portable storage container service, but it remains an important alternative when comparing storage solutions.
A traditional storage unit requires the customer to transport belongings to the storage facility. That can be less convenient than having a portable container delivered to the home, particularly when large furniture is involved.
However, conventional self-storage can make sense when customers want frequent access to their belongings. Some facilities allow customers to drive directly to their unit and retrieve items whenever the facility is open.
Traditional storage can also offer a wider selection of unit sizes and features in some markets. Customers may find units with climate control, drive-up access, specialized security systems, and other facility-specific options.
The trade-off is transportation. Instead of the storage company bringing the container to the customer, the customer is responsible for getting belongings to the storage facility.
For someone storing a few boxes for several months, traditional storage can be perfectly practical. For a household in the middle of a renovation or move, however, a portable container often provides a more convenient workflow.
Portable Storage Container vs. Traditional Self-Storage
The choice between portable storage and traditional self-storage depends largely on how often the customer needs access to belongings and who is responsible for transportation.
Portable storage has one obvious advantage: the storage unit comes to the customer.
That means furniture can be moved directly from the home into the container. If the container stays on the property, belongings remain nearby. If it is moved to a storage facility, the customer generally does not have to unload everything into a second storage unit.
PODS specifically describes this as a load-once, unload-once model.
Traditional storage takes the opposite approach. The customer transports belongings to the facility, unloads them, stores them, and later transports them again.
For short-term renovation projects, portable storage can be particularly useful. A homeowner can remove furniture from rooms being renovated while keeping everything nearby.
Portable storage also works well for staged home sales. Furniture and excess belongings can be removed from the home without requiring an immediate final move.
Are Portable Storage Containers Waterproof?
This is one of the most common questions customers should ask before renting a container.
The answer is that weather-resistant and waterproof are not always the same thing.
PODS, for example, specifically describes its containers as weather-resistant and states that they are designed to protect belongings against typical weather such as rain and snow. It does not describe them as completely waterproof.
UNITS takes a stronger position on its container construction, stating that its containers are 100% weather-resistant and feature corrugated roofs designed to support water runoff. Its floors also have a waterproof coating.
Regardless of the provider, customers should pack belongings appropriately. Boxes should not be placed directly against areas where condensation could accumulate, and moisture-sensitive possessions should receive additional protection.
Customers storing important documents, electronics, artwork, photographs, or other sensitive possessions should also ask whether indoor or climate-controlled storage is available.
How Big of a Portable Storage Container Do You Need?
Container sizing is one area where customers should avoid relying only on square footage estimates.
The amount of furniture, the size of individual items, packing efficiency, and the amount of vertical space used can all affect capacity.
A lightly furnished 1,000-square-foot home can require significantly less storage space than a heavily furnished home of the same size.
UNITS offers 12- and 16-foot containers, with the company estimating that the 12-foot unit can accommodate approximately 500 to 800 square feet of belongings and the 16-foot unit approximately 1,200 to 1,250 square feet.
PODS offers three sizes, ranging from an 8-foot container for smaller spaces to a 16-foot container intended for substantially larger households.
U-Box and SMARTBOX take a different approach by using smaller modular containers. This can be useful when customers are unsure about their storage requirements because additional containers can be added as needed.
The best approach is to make an inventory of large furniture first. Sofas, beds, refrigerators, dining tables, wardrobes, exercise equipment, and large appliances can consume space quickly.
Once those items are accounted for, boxes and smaller possessions can be estimated around them.
What Should You Look for in the Best Portable Storage Containers?
The best portable storage container is not necessarily the biggest or cheapest.
Customers should first determine whether the container can be delivered to the property. A 16-foot container is of little use if the driveway cannot accommodate it.
The second consideration should be construction. Weather-resistant materials, strong doors, secure locking systems, and durable floors are all worth examining.
The third is loading height. Ground-level containers are usually easier to load because customers do not need to carry heavy furniture up a ramp.
Storage arrangements should also be reviewed carefully. Ask whether the container can remain at home, whether it can be moved to an indoor facility, whether access is available while it is stored, and whether the storage facility is climate controlled.
Finally, ask about the complete price. A monthly storage rate is only one part of the bill. Delivery, pickup, transportation, storage, protection plans, labor, and additional containers can all affect the final cost.
Which Portable Storage Container Is Best?
After comparing container design, storage flexibility, sizes, loading arrangements, weather resistance, and moving services, UNITS® Moving and Portable Storage is our top pick for the best portable storage containers.
Its strongest advantage is that the service is not built around a single feature. UNITS combines sturdy weather-resistant containers, a high 8,000-pound capacity, ground-level loading, two useful container sizes, specialized ROBO-UNIT placement technology, on-site storage, off-site warehouse storage, and moving capabilities.
That makes it a particularly strong fit for homeowners who are moving, renovating, downsizing, staging a property, or simply need additional storage space without repeatedly hauling belongings to a traditional facility.
PODS is a close alternative for customers who value having three container sizes. U-Haul U-Box is attractive for modular DIY moves, particularly when a customer wants smaller containers. 1-800-PACK-RAT is a strong option for customers who prioritize all-steel construction. Zippy Shell stands out for indoor storage options in many markets, while U-Pack ReloCube works well for smaller long-distance moves.
The right choice ultimately depends on the customer’s location, storage volume, moving distance, property layout, and preferred storage arrangement.
For someone starting the search with no particular provider in mind, however, UNITS® Moving and Portable Storage is the company we would put at the top of the list.
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