Published: January 14, 2026
Choosing a portable storage container sounds simple until you’re standing in front of one, halfway through loading, and realizing space is disappearing faster than expected. The wrong container size creates stress, rushed decisions, and sometimes damaged belongings. The right one gives you breathing room and control over the entire move.
As CEO of UNITS Moving and Portable Storage, Michael McAlhany has seen this play out thousands of times. His advice is consistent: don’t choose a container based on guesswork or home size alone. Choose it based on how you actually live, pack, and move.
This guide breaks down how to choose the right portable storage container so your move stays organized, flexible, and far less stressful.
Start With What You Own, Not the Size of Your Home
One of the most common mistakes people make is choosing a container based on square footage or bedroom count. While that can be a rough starting point, it’s often misleading.
A minimalist three-bedroom home may need less space than a one-bedroom apartment packed with furniture, hobbies, and storage closets. Michael McAlhany often explains that belongings don’t pack the way rooms look. Furniture takes up more space once it’s wrapped, mattresses don’t compress well, and appliances demand room for protection.
Instead of focusing on home size, take a realistic inventory. Walk through each room and mentally account for large furniture, appliances, garage items, and anything stored in closets or attics. This gives you a much clearer picture of the space you’ll need.
Understand How Container Sizes Really Work
Portable storage containers usually come in small, medium, and large options. While exact dimensions vary, the real difference comes down to how items stack once packed properly.
Small containers work well for light moves, such as studios, dorm rooms, or partial storage needs. Medium containers typically handle one- to two-bedroom homes when packed efficiently. Large containers are best for multi-bedroom homes, families, or moves that combine storage and relocation.
As CEO, Michael McAlhany often cautions against choosing the smallest option just to save money. Overpacked containers lead to shifting, damaged items, and difficult unloading. A little extra space usually costs far less than replacing broken furniture.