Storage Unit Cost Calculator by Size
Self-storage costs $40–$400 per month in 2026 depending on unit size. A 5x5 runs $40–$75, a popular 10x10 runs $95–$170, and a large 10x20 runs $160–$280. Climate-controlled units add a 25–50% premium over standard outdoor units.
Monthly Storage Cost = Base Rate (by Unit Size) × Climate-Control Multiplier (1.0–1.5) + Insurance + Admin Fee
Self-storage pricing is driven almost entirely by unit size, measured in square feet of floor space. The most common units range from a closet-sized 5x5 up to a one-car-garage-sized 10x20 or larger. Rates also vary by location, climate control, and ground-floor versus upper-floor access. According to U.S. Census economic data, self-storage is one of the fastest-growing real-estate sectors in the United States, with demand pushing average monthly rents steadily upward.
This calculator estimates your 2026 monthly storage cost based on the unit size you need and whether you require climate control. Whether you are bridging a gap between moves, decluttering, or storing seasonal items, picking the right size avoids paying for empty space — or cramming belongings into a unit that is too small. If your storage need is tied to a relocation, also verify any mover handling the items at FMCSA.gov.
What This Means
Your estimate reflects the typical 2026 monthly rent for the selected unit size, with a higher range for climate-controlled units and premium metro markets. Most facilities also charge a one-time admin fee ($20–$30) and require insurance ($8–$15/month) or proof of an existing policy. Remember that advertised "first month free" promotions often reset to the full street rate after the introductory period — confirm the long-term monthly rate before signing a lease.
Storage Unit Cost by Size (2026 National Averages)
Storage units are priced per square foot of floor space, so the single biggest factor in your monthly bill is the unit size you rent. The table below shows 2026 national average monthly rates for standard (non-climate-controlled) units, along with the approximate household contents each size holds:
| Unit Size | Floor Area | What Fits | Monthly Cost |
|---|---|---|---|
| 5x5 | 25 sq ft | A closet's worth of boxes, small furniture, seasonal items | $40–$75 |
| 5x10 | 50 sq ft | Studio or one-bedroom contents, a mattress set, several boxes | $60–$110 |
| 10x10 | 100 sq ft | Two-bedroom apartment, appliances, furniture sets | $95–$170 |
| 10x15 | 150 sq ft | Three-bedroom home minus large appliances | $130–$220 |
| 10x20 | 200 sq ft | Full three- to four-bedroom home, contents of a one-car garage | $160–$280 |
| 10x30 | 300 sq ft | Large four- to five-bedroom home, vehicle plus household goods | $225–$400 |
These ranges reflect typical 2026 street rates across U.S. markets. Coastal metros (New York, San Francisco, Boston) sit at the top of each range or above, while smaller inland markets sit at the bottom.
Climate-Controlled Storage: Is the Premium Worth It?
Climate-controlled units keep temperature and humidity within a stable range, typically 55–80°F. They cost 25–50% more than standard outdoor drive-up units of the same size. The chart below compares average 2026 monthly costs for standard versus climate-controlled units across common sizes:
Climate control is worth the premium when you store items vulnerable to heat, cold, or moisture:
- Wood and leather furniture that can warp, crack, or develop mildew
- Electronics and appliances sensitive to condensation
- Photos, documents, and artwork that degrade in humidity
- Musical instruments that go out of tune or crack
- Anything stored long-term (more than a few months) in a humid or extreme-climate region
For short-term storage of durable items — tools, patio furniture, plastic-bin goods — a standard drive-up unit usually makes more financial sense.
How to Save on Storage
Storage costs add up quickly over months, so a few smart choices meaningfully lower your bill:
- Right-size the unit. Renting one size larger "just in case" wastes $40–$80/month. Pack tightly and stack vertically to fit a smaller unit.
- Skip climate control for durable goods. Save 25–50% when items can tolerate temperature swings.
- Compare facilities. Rates for identical sizes can differ 20–40% within the same city. Get at least three quotes.
- Negotiate or use promotions. Many facilities offer a free first month or discounted long-term rates, especially for slow seasons.
- Consider a portable container instead. For move-related gaps, a PODS container can combine storage and transport in one cost — see our PODS calculator.
If your storage need is part of a relocation, coordinate the unit size with the number of boxes from our moving box calculator so you rent exactly the space you need.
Frequently Asked Questions
How much does a 10x10 storage unit cost per month?
A 10x10 storage unit costs $95–$170 per month in 2026 for a standard, non-climate-controlled unit. Climate-controlled 10x10 units run roughly $120–$215 per month. A 10x10 holds the contents of a two-bedroom apartment, including furniture and appliances. Prices sit at the high end of the range in coastal metros and at the low end in smaller inland markets.
What size storage unit do I need for a 2-bedroom apartment?
A 10x10 unit (100 sq ft) typically holds a two-bedroom apartment, including a sofa, mattress sets, a dining set, and several boxes. If you have large appliances or a lot of furniture, step up to a 10x15. Pack vertically and disassemble bed frames and tables to maximize the floor space you are paying for.
Is climate-controlled storage worth the extra cost?
Climate-controlled storage costs 25–50% more but is worth it for wood and leather furniture, electronics, documents, photos, artwork, and musical instruments — anything that can warp, mildew, or degrade in heat and humidity. For durable items like tools and plastic-bin goods stored short-term, a standard drive-up unit is the better value.
Are there hidden fees with storage units?
Yes. Beyond the monthly rent, expect a one-time admin fee ($20–$30), required insurance ($8–$15/month or proof of an existing policy), and a lock purchase ($10–$20). Many facilities also raise the rate 8–15% after a 3–6 month introductory period. Always ask for the all-in monthly cost and the renewal rate before signing.
How can I get the cheapest storage unit?
Right-size the unit rather than over-renting, skip climate control for durable goods, and compare at least three facilities since rates for the same size can vary 20–40% in one city. Take advantage of first-month-free promotions and ask about discounted long-term rates. For move-related storage, a portable container may bundle storage and transport more cheaply than a unit plus a separate move.