What Size Storage Unit Do I Need? Start With Your Home, Not the Chart

Almost every storage size guide online is the same chart. A 5×10 is a studio apartment. A 10×10 is a one-bedroom. A 10×20 is a three-bedroom house. Pick your row and book it.

The problem is that the chart assumes you are storing an entire household, and most people are not. They are storing the contents of a garage during a renovation, or the furniture from one bedroom, or everything they own for six weeks between closings. Those are completely different volumes, and picking off a chart is how people end up paying for months of space they never used or standing in front of a unit that will not close.

Here is a more useful way to work it out.

Start With What Is Actually Going In

Before looking at any dimensions, sort your items into three groups.

Large furniture. Sofas, beds and mattresses, dressers, dining tables, desks, bookcases, appliances. These set your floor space requirement, because most of them cannot be stacked on top of each other safely.

Boxes and bins. These stack, so they consume vertical space rather than floor space. Storage units are typically eight feet tall, and people routinely forget they can use all of it.

Awkward items. Mattresses that need to stand on edge, mirrors and artwork that cannot have weight on them, bicycles, exercise equipment, lawn equipment. These waste space in ways that are hard to predict, and they are the main reason estimates come up short.

The ratio matters more than the total. Fifty boxes and two pieces of furniture needs far less floor space than ten boxes and a full bedroom set, even though the second one sounds smaller.

The Standard Sizes, For Reference

Most self-storage facilities use a common set of dimensions. Worth knowing what they hold, whether or not you end up renting one:

5×5 (25 sq ft). A small closet. Seasonal decorations, a few boxes, sports equipment. Not enough for furniture.

5×10 (50 sq ft). A large walk-in closet. A mattress set, a dresser, and roughly fifteen to twenty boxes. Works for a studio if you are not storing much furniture.

10×10 (100 sq ft). Half a one-car garage. The realistic ceiling for a one-bedroom apartment, or a tight fit for a lightly furnished two-bedroom.

10×15 (150 sq ft). A large bedroom. A two-bedroom apartment or a small home, with room for appliances.

10×20 (200 sq ft). A standard one-car garage. A three-bedroom house, or a vehicle.

10×30 (300 sq ft). A large garage. Four or more bedrooms, or commercial inventory.

Use these as a mental reference point rather than a decision. The next section is the part that actually determines what you need.

Estimate From Your Situation, Not Your Address

Storing one or two rooms during a renovation. Almost everyone overbuys here. A single bedroom’s furniture plus its boxes fits comfortably in something around 100 to 120 square feet. A kitchen being renovated is mostly boxes, which stack, so it needs far less floor space than the room itself suggests.

Storing a garage or basement. This is the category people underestimate most. Garages hold lawn equipment, tools, sports gear, seasonal items, and paint that cannot go in storage at all. Most full garages need the equivalent of a 10×15, not a 10×10.

Bridging between two homes. Here you are storing an entire household, and the standard chart is genuinely useful. Match your home size and then go one step up if you have a full garage, a finished basement, or an attic. Those three are what break the estimate.

Downsizing. You are storing what did not fit, plus what family members have not collected yet. Estimate generously and plan to reduce, because the whole point of downsizing is that the volume shrinks over time rather than all at once.

Storing a business inventory or office contents. Measure rather than estimate. Commercial storage volume is usually more predictable than household, and getting it wrong is more expensive.

Four Things That Wreck a Storage Estimate

Mattresses. A queen or king mattress standing on edge eats a surprising amount of floor space and cannot have anything stacked against it without bowing. Plan around it rather than fitting it in last.

Sofas that will not stand upright. Sectionals and reclining sofas often cannot be stood on end, which means they occupy their full footprint. A regular three-seat sofa standing vertical saves a meaningful amount of room.

Appliances. A refrigerator, washer, and dryer together take roughly the floor space of a small bedroom set, and none of them stack.

The ceiling you did not use. Units are usually eight feet tall. If your boxes are stacked four feet high, you are paying for space you are not using. Heavy boxes on the bottom, light on top, and a clear aisle down the middle so you can reach the back.

Should It Be Climate-Controlled?

In Indiana, more often than people expect. The state swings from humid summers well into the nineties to winters below freezing, and unheated storage tracks those swings.

Climate control is worth it for: wood furniture, which cracks and warps with humidity cycling; upholstery and mattresses, which hold moisture and grow mildew; electronics; photographs, documents, and books; artwork; musical instruments; and anything leather.

You can skip it for: outdoor equipment, tools, plastic bins of non-sensitive items, and anything already built to live outside.

The practical test is whether the items are hard to replace. A mildewed sofa and a warped dresser cost more than the climate-control difference over almost any storage period.

What Move Indy Offers

We run two unit sizes, both climate-controlled and video-monitored, with flexible in-and-out scheduling.

8×15 (120 sq ft), $150/month. Comfortably handles a one-bedroom apartment, a two-bedroom if you are not storing much furniture, a full garage clear-out, or one to two rooms during a renovation. This covers the majority of the storage we book.

8×25 (200 sq ft), $250/month. Handles a two to three-bedroom home, or a smaller home with a full garage or basement included.

$18/day, either size. For short bridges between closings where a monthly rate does not make sense. This is the option most people do not realize exists and it is often the right one, because a genuine two-week gap should not cost a full month.

If you are unsure between the two, tell us what is going in and we will size it. We handle this often enough to estimate it accurately, and a unit that is slightly too large costs less than a second trip because the first one did not close.

Practical Tips Before You Load

Get the boxes right. Uniform box sizes stack far better than mismatched ones, which is worth more space than most people realize. Our packing supplies page covers box sets, and our guide on where to get moving boxes covers the free and cheap options.

Disassemble what you can. Bed frames, table legs, and shelving units take dramatically less space broken down. Keep the hardware bagged and taped to the piece it belongs to.

Leave an aisle. If you will need anything before you empty the unit, you need to be able to reach the back. Load with the things you will want first nearest the door.

Cover upholstery, do not seal it. Sheets or breathable covers rather than plastic. Sealed plastic traps moisture against fabric and causes exactly the problem you were trying to prevent.

Clear out first. Storing things you are going to throw away in six months is paying rent on a decision you have already made. Junk removal before you load is almost always cheaper than a larger unit.

Move Indy Offers Climate-Controlled Storage Across Central Indiana

Our climate-controlled storage serves Indianapolis, Hendricks County, Hamilton County, and Johnson County, available by the month or by the day with flexible scheduling.

Because we also do the moving, we can load your unit as part of your local move rather than making it a separate project, and handle packing on the way in if you would rather not. Our full rates are on the pricing page.

Not sure which size fits? Call 317-520-1473 or request a free quote, tell us what is going in, and we will size it for you.