Renting a storage unit sounds simple until you are standing in the rental office being asked to choose between a 5x10 and a 10x10 with no idea which one swallows your life and which one leaves you paying for empty air. Guess too small and your belongings do not fit, so you scramble for a second unit or leave things behind. Guess too big and you pay every month for space you never use. The good news is that storage sizing follows a predictable logic, and once you know it, picking the right unit takes about two minutes.
Storage units come in standard sizes, and the easiest way to choose is by how many rooms of belongings you have. A 5x5 holds a closet's worth, a 5x10 fits a studio or one-bedroom, a 10x10 suits one to two bedrooms, a 10x15 handles a two to three-bedroom home, and a 10x20 holds a three to four-bedroom house or a car. When you are between two sizes, size up, because a little extra room costs far less than renting a second unit.
Here is how to work out the size you actually need.
Start by thinking in rooms, not measurements
The mistake people make is trying to picture square footage, which almost nobody can do accurately. The reliable method is to think in rooms. Count how many rooms of furniture and boxes you are storing, be honest about the big, bulky items, and match that to a unit size. Storage facilities size their units around exactly this, so a room count gets you to the right answer faster than any tape measure.
Before you book, do a quick inventory. Note the large furniture, the number of boxes, and any awkward items like appliances, bikes or a mattress set. A simple list, or a moving checklist app, keeps you from underestimating, which is the most common sizing mistake.
Storage unit size guide
These are the standard sizes and what each realistically holds. Use them as your starting point.
| Unit size | Roughly holds | Good for |
| 5x5 (25 sq ft) | A large closet | A few boxes, small furniture, seasonal items |
| 5x10 (50 sq ft) | A studio or small one-bedroom | Mattress set, boxes, a dresser, a small sofa |
| 10x10 (100 sq ft) | One to two bedrooms | Contents of a small apartment, appliances |
| 10x15 (150 sq ft) | Two to three bedrooms | A family home's worth, larger furniture |
| 10x20 (200 sq ft) | Three to four bedrooms | A full house, or a car plus boxes |
| 10x30 (300 sq ft) | Four to five bedrooms | A large house, or a vehicle plus household goods |
A helpful rule of thumb: a 10x10 unit is the one most people picture when they think storage, and it comfortably holds the contents of a one to two-bedroom home when packed sensibly. Scale up or down from there by room count.
How packing changes the size you need
Two people with the same amount of stuff can need different unit sizes depending entirely on how they pack. Uniform, sturdy boxes stack tall and square, using the full height of the unit and cutting the floor space you need. Loose, odd-shaped piles waste enormous amounts of room. Good packing with proper boxes can genuinely drop you a unit size, which pays for the boxes several times over. Think vertically, stack heavy on the bottom, and leave a narrow aisle so you can reach the back.
When to size up, and when not to
When you are torn between two sizes, size up. The price difference between adjacent unit sizes is usually modest, while the cost and hassle of discovering mid-move that everything does not fit, and needing a second unit across town, is far greater. A little breathing room also lets you access items without unloading the whole unit.
The exception is if you have inventoried carefully and know your belongings fit the smaller unit with room to spare. There is no sense paying for space you have confirmed you do not need. The goal is the smallest unit that fits everything comfortably with a walkway, not the biggest unit you can afford.
Do you need climate-controlled storage?
Size is only half the decision. The other half is whether your belongings need climate control, and in our region that matters. A standard unit is like a garage, protecting from rain and snow but not from heat, cold or humidity. A climate-controlled unit holds a steady temperature and humidity like your home.
For Vancouver and the North Shore, where the climate swings between cold, damp winters and warm summers with high humidity, that difference is real. Moisture can warp and crack wood, grow mould on fabrics and upholstery, and rust metal, so anything valuable, wooden, electronic, or fabric is far safer in climate control. Our guide to climate-controlled storage explains exactly what it protects and when it is worth it.
Self-storage, mobile containers, or full-service storage
Size is one decision, but the type of storage matters too, and there are three main routes. Self-storage units are the familiar option: you rent a space, you get a key, and you load and access it yourself whenever you like, which suits people who need regular access. Mobile storage containers are dropped at your home, you fill them at your own pace, and they are collected and stored, which removes the trips back and forth. Full-service storage, often offered by movers, means the same team that packs and moves your belongings also stores them securely, so your things are handled once and kept safe until you are ready. For a move where you are between homes, that last option is frequently the least stressful, since nothing changes hands more than it has to.
How long will you need it?
Be realistic about the timeframe, because it shapes both the cost and the type. Short-term storage, a few days to a few weeks, is the classic between-homes or renovation situation, where convenience and easy access matter most. Long-term storage, for months or more, is where climate control and secure, well-padded stacking really earn their place, since your belongings will sit through changing seasons. Storage is usually billed by the month, so a smaller, well-packed unit saves money every single month you hold it, which is another reason not to over-rent, once you have honestly confirmed everything fits.
Get the size right the first time
Choosing a storage unit is not guesswork once you think in rooms, inventory honestly, and factor in how well you pack. Get it right and you pay for exactly the space you use, with everything protected and easy to reach.
Smoother Movers, led by founder Douglas Bensley with over 40 years of local experience, offers secure, climate-controlled storage alongside our moving service, so your belongings are handled and stored by the same trusted team. For help sizing your move and storage, get a free estimate, or call our Vancouver office on 604 682 2232 or our North Vancouver office on 604 987 8655.
Frequently Asked Questions
What size storage unit do I need for a one-bedroom apartment?
A 5x10 unit usually holds a studio or small one-bedroom, and a 10x10 comfortably fits a one to two-bedroom apartment including appliances. If your one-bedroom is well furnished, lean toward the 10x10 so everything fits with room to move.
What fits in a 10x10 storage unit?
A 10x10 unit holds roughly the contents of a one to two-bedroom home, including furniture, appliances and boxes, when packed sensibly. It is the size most people picture when they think of a storage unit and the most commonly rented.
What size storage unit do I need for a whole house?
A 10x20 unit typically holds a three to four-bedroom house, and a 10x30 suits a large four to five-bedroom home. For a full house, count the rooms and lean toward the larger size, especially if you have bulky furniture or appliances.
Should I get a bigger storage unit than I think I need?
When you are between two sizes, yes. The price gap between adjacent sizes is usually small, while renting a second unit because everything did not fit is expensive and inconvenient. A little extra room also makes it easier to reach your things.
Do I need climate-controlled storage in Vancouver?
For anything valuable, wooden, electronic or fabric, it is worth it. Vancouver's damp winters and humid summers can warp wood, grow mould on fabrics and rust metal, and a climate-controlled unit holds a steady temperature and humidity to prevent that.
How can I fit more into a smaller storage unit?
Pack in uniform, sturdy boxes and stack them tall to use the unit's full height, put heavy items on the bottom, disassemble large furniture, and leave a narrow aisle to the back. Good packing can often drop you a whole unit size.
Need storage with your move?
We offer secure, climate-controlled storage handled by the same team that moves you.