How to Keep an Inventory of Your Storage Unit
Updated August 1, 2026
To inventory a storage unit, photograph and number every box and large item as it goes in, and record what each container holds so you can find things without unpacking the unit. It matters for two reasons: you are paying monthly for things you cannot remember owning, and the facility's insurance usually covers the building rather than your belongings, so a claim after fire, flood, or break-in needs your own record of what was inside.
A storage unit is where possessions go to become invisible. You pay every month, the direct debit stops registering, and after a year or two you genuinely cannot say what is in there — only that it seemed worth keeping. Cataloguing a unit fixes two separate problems at once: it tells you whether the unit is still worth its rent, and it gives you the record you would need if anything ever happened to it.
The insurance assumption that catches people out
Most people assume the storage facility insures their belongings. Generally it does not — the facility's cover protects the building, and your contract usually makes the contents your responsibility. Some home contents policies extend to goods in storage, often at a reduced limit; some require a specific endorsement; and facilities frequently sell their own contents cover. Whichever applies to you, every one of those routes ends the same way at claim time: you have to say what was in there and what it was worth.
Catalogue as it goes in, not after
The right moment is while you are packing, because you are handling everything anyway. Once boxes are stacked three deep in a unit, cataloguing means unloading it into the corridor. Ten extra seconds per box during the move saves an entire afternoon later, and it is the difference between a real inventory and a vague intention.
Number the boxes and record the contents
- Give each box a number or a label, and write it where you can see it from the door
- Photograph the open box before you seal it
- Record roughly what is inside — you do not need every teaspoon, just what matters
- Photograph large items separately: furniture, appliances, bikes, tools
- Note anything valuable or fragile, and where it sits in the unit
Draw the unit, roughly
A crude sketch of where things are stacked is worth more than it sounds. When you need one specific box in eighteen months, knowing it is back-left at shoulder height turns a two-hour excavation into a five-minute visit. A photograph of the unit taken from the doorway once it is packed does most of the same job.
The audit worth doing once a year
Storage costs are recurring, and possessions are not always worth what the rent adds up to. Once a year, look at your list and ask honestly whether the unit still earns its money. A great many units hold a few genuinely valuable things surrounded by items that cost more to store than to replace. You cannot make that judgement without a list — which is a large part of why so few people make it.
If the worst happens
Storage units flood, burn, and get broken into like anywhere else, with one crucial difference: you are not there to notice, and you may not find out for weeks. That makes reconstructing the contents from memory even harder than at home, because you have not seen the things in months. A catalogue made when you packed is the only realistic way to answer what was lost.
Doing it with Stowly
Stowly lets you treat a storage unit as its own room, so the unit's contents stay separate from the house but live in the same inventory. Photograph boxes as you pack them and note what each holds — unlimited items and rooms are free. If you want to find a specific box without opening ten, QR labels let you stick a code on each box and scan it to pull up the contents; that and the exportable PDF come with Plus.
Frequently asked questions
Does the storage facility insure my belongings? Usually not — the facility typically covers its building, and the contract generally makes contents your responsibility. Check your storage agreement and your home contents policy, since some extend to goods in storage at a reduced limit.
How detailed should a box list be? Enough to find things and to claim for them. "Kitchen — pans, utensils, small appliances" is fine; every item individually is not necessary unless it is valuable.
What if the unit is already packed? Do what you can from the door — photograph the visible stacking and list what you can identify — then catalogue properly the next time you have reason to open it.