Guide · updated
Bigger units cost less per square foot
The smallest unit costs $1.76 per square foot. The largest costs $0.84 — 52% less for the same cubic space.
Every unit carries the same fixed overheads: a door, a lock, a slice of corridor, a line in the security system, the staff time to rent it. Those costs barely change between a locker and a garage, so they land far more heavily on a small unit. The result is a price curve that falls steadily with size.
- 5x5 · 25 sq ft $1.76
- 5x10 · 50 sq ft $1.31
- 5x15 · 75 sq ft $1.26
- 10x10 · 100 sq ft $1.14
- 10x15 · 150 sq ft $0.97
- 10x20 · 200 sq ft $0.89
- 10x25 · 250 sq ft $0.78
- 10x30 · 300 sq ft $0.84
| Size | Sq ft | Observations | Typical monthly | Per sq ft |
|---|---|---|---|---|
| 5x5 | 25 | 7,626 | $44 | $1.76 |
| 5x10 | 50 | 10,193 | $66 | $1.31 |
| 5x15 | 75 | 4,252 | $94 | $1.26 |
| 10x10 | 100 | 10,273 | $114 | $1.14 |
| 10x15 | 150 | 7,304 | $146 | $0.97 |
| 10x20 | 200 | 7,076 | $178 | $0.89 |
| 10x25 | 250 | 2,270 | $196 | $0.78 |
| 10x30 | 300 | 3,898 | $253 | $0.84 |
Where the trend breaks. It is not perfectly monotonic: the 10x30 costs more per square foot than the size below it. The likely reason is supply — the largest units are rare, held by fewer facilities, and scarcity outweighs the overhead effect. We are reporting it rather than smoothing it, because a curve that is clean everywhere usually means someone cleaned it.
How to use this. The per-square-foot figure is not a reason to rent a bigger unit than you need — paying more in total for a lower unit rate is still paying more. It is a reason to check the next size up when you are close to the boundary. Going from 5x5 to 5x10 doubles your space for 50% more money, which is the single best value step in the range.
It is also a reason to be suspicious of splitting your belongings across two small units. Two 5x5 units cost more than one 5x10 and give you the same floor area, two doors to unlock and two sets of paperwork.