Reviewed 7 September 2026

10x15 storage unit cost: the step-up size

The 10x15 is the 2-bedroom default and the commonest upgrade from a 10x10: 150 square feet, roughly 1,200 cubic feet. Half again the floor of a 10x10, for a good deal less than half again the rent. This page no longer carries a national dollar band or a city price table, because neither was sourced. What it carries is why the step up usually pays for itself, and how to get the two quotes that prove it at your own site.

Floor area

150 sqft

Usable volume

1,200 cu ft

BLS index, July 2026

185.5

Year on year

+1.4%

What changed here on 7 September 2026

A national monthly band, a ten-city price table and a per-square-foot figure came off this page. All were hand-typed with nothing behind them, and the basis they claimed was a sample of operator listing pages, which those operators' terms do not permit us to collect or republish. The size-up argument stays, because it never depended on those numbers. It depends on a fact about how storage facilities are costed, and you can test it in one phone call.

Why the step up from a 10x10 is cheap

A 10x15 is 150 square feet at the standard 8 foot ceiling, so about 1,200 cubic feet of usable volume. Half again the floor of a 10x10, and at every facility we are aware of, considerably less than half again the rent.

The reason is that a storage unit's costs are not proportional to its floor. It needs one door, one lock, one light and one stretch of aisle frontage whatever its size, and the facility spends roughly the same securing, insuring, cleaning and administering a small unit as a large one. Those costs land once per unit. Add 50 square feet and you are buying floor at close to the marginal cost of the slab, not at the average cost of the unit you already have. That is the whole reason the price-per-square-foot curve slopes down as sizes get bigger, and it is why the marginal square foot on this step is cheaper than the average square foot you were already paying for.

The far more expensive mistake is the other one: taking a 10x10 you will outgrow, then adding a second small unit in three months. That duplicates the administration charge, the cover and the agreement, and puts you back on the steepest part of the per-square-foot curve for the second unit. If your inventory is genuinely near the boundary, the cost of being wrong is asymmetric, and it points at sizing up.

We are not going to tell you what the step costs, because it varies by site and by month and nobody publishes it. We will tell you how to find out: ask for the 10x10 and the 10x15 in the same call, both quoted as the month-two rate rather than the introductory offer, and you have the number that actually decides this.

Where storage pricing has actually gone

Two free public sources survive on this site, and both are worth knowing before you take a quote. The first is the US Bureau of Labor Statistics producer price index for miniwarehouse and self-storage unit operators, series PCU531130531130, base December 2003 = 100, not seasonally adjusted, read on 2026-09-13 through St. Louis Fed (FRED).

July 2026

185.5

Up 1.4% on July 2025, when the index read 182.9.

Peak, December 2023

200.6

Pricing is still 7.5% below the top of the cycle.

January 2020

149.0

Up 24.5% since, on this measure.

It is an index, not a dollar figure, and we do not convert it into one: that needs a per-square-foot assumption we would be inventing. It is also national and size-blind, so it says nothing about a 10x15 specifically.

The second source is an annual report. Public Storage's Form 10-K, FY2025 (filed 12 February 2026, period ending 31 December 2025) reports realized annual rent of $22.54 per occupied square foot across its Same Store Facilities, against $22.43 a year earlier, at 92.0% average occupancy. Do not multiply it by 150. It blends every size and market the company operates in, and large units sit below that blend while small ones sit above it, so the arithmetic goes wrong in a direction that depends on the size you are pricing.

Sources: US Bureau of Labor Statistics, series PCU531130531130 and SEC EDGAR, Public Storage Form 10-K, FY2025 (read 6 September 2026).

What fits in a 10x15

2-bedroom apartment full contents

King bedroom set plus guest queen set

Living room plus dining room furniture

Refrigerator plus washer plus dryer

30 to 40 medium boxes plus furniture

Three pickup-truck loads

Full home office: 2 desks + 4 chairs + bookshelves

Single-car garage plus 1-bedroom apartment combined

The 10x15 is the size where 2-bedroom apartment moves stop feeling like Tetris. There is room for full-size furniture stacked properly (mattress on edge along the 15-foot wall, sofa stood vertically, dining table broken down flat against the back). You can fit two king bedroom sets, a complete living room, dining room, and three appliances with room to walk down the centre. For a typical 1,200 sqft 2-bedroom apartment full contents, the 10x15 is the right call most of the time.

When it is not, the inventory is heavier than the apartment dimensions suggest: large sectional sofas, oversized dining tables, multiple appliances, dense book or document storage. The deciding item is usually the dining table. A 6-seater rectangle with bench seats and a buffet pushes you toward a 10x20. A small round 4-seater fits comfortably in the 10x15.

For renovation storage during a remodel, the 10x15 is the standard recommendation for a single-floor strip-out (kitchen, living, dining and half bath). For full-house renovations above about 1,500 sqft, look at 10x20 or 10x25.

10x10 vs 10x15 vs 10x20

10x10

100 sqft

1-bedroom apartment, single-car garage equivalent. The most-rented size.

10x15 (you are here)

150 sqft

2-bedroom apartment full contents, single-floor renovation storage.

10x20

200 sqft

3-bedroom partial, 2-car garage equivalent. Vehicle-storage compatible.

Each step to the right buys floor more cheaply per square foot than the step before it, so the question at the counter is never what one size costs. It is what two adjacent sizes cost in the same breath, on the month-two rate. If your inventory sits genuinely close to a boundary, size up: renting a second unit later, or paying someone to come and reorganise an overstuffed one, both cost more than the marginal rent on the larger size.

Getting a number that is about you

Ask three sites, in the same week, the same four things

What is the 10x15 rate today, and what does it become in month two once any introductory offer ends?
What is the 10x10 at the same site, quoted the same way? The gap is the decision.
What is compulsory on top of the rent: cover on the goods, a lock, an administration charge?
When is the first rate review likely, and how much notice do I get?

Take the answers in writing where you can. A national average is not a comparison; three sites in one week is.

10x15 storage FAQ

How much does a 10x15 storage unit cost per month?

We do not publish a figure. The national band and the ten-city table this page used to carry came off on 7 September 2026, because they were hand-typed with no source and the basis they claimed was a sample of operator listing pages we should not have been collecting. No free primary source publishes US rates by unit size. What is checkable is direction: the US Bureau of Labor Statistics producer price index for self-storage operators stood at 185.5 in July 2026, 1.4 percent above a year earlier and 7.5 percent below its December 2023 peak. Ring three local sites in the same week and compare the month-two rate.

What can fit in a 10x15 storage unit?

A 10x15 holds the contents of a full 2-bedroom apartment or a partial 2-bedroom house. Realistic: king mattress and box spring plus guest bed, full living room set (sofa, loveseat, chair, coffee and end tables), dining table with six chairs, refrigerator and washer or dryer, plus 30 to 40 boxes. It is also the right size for a small home renovation requiring everything-out storage of a single floor.

Is the 10x15 worth the upgrade from a 10x10?

If you have anything more than a 1-bedroom apartment of contents, usually yes, and the reason is structural. The fixed costs of a storage unit, its door, lock, light, aisle frontage and share of the security and administration bill, land once per unit and do not scale with the floor. So 50 percent more floor never costs 50 percent more rent, and the marginal square foot on the step up is cheaper than the average square foot you are already paying for. It is also far cheaper than the alternative of taking a second small unit later, which duplicates the administration charge, the cover and the agreement. Ask for both sizes quoted in the same call and you will see the gap for yourself.

10x15 standard vs climate-controlled, when worth it?

For a 2-bedroom move, climate control is usually the safer call. Inventories at this size almost always include wood furniture, electronics, photos and mattresses, all of which suffer in humidity and temperature swings. The premium varies with how much of a given building was constructed as climate space, so ask for both prices at the same site rather than assuming an uplift. If your inventory is mostly storage-tolerant items (plastic bins, sports gear, tools), standard is fine.

Can a 2-car garage fit in a 10x15?

Not the cars themselves, but yes for the contents of a typical 2-car garage clear-out. A 10x15 holds two motorcycles, four bicycles, a riding lawnmower, full toolset, garden equipment, and 15 to 20 boxes of garage overflow with room to walk. For storing actual vehicles, a 10x20 is the minimum (single car), or look at dedicated vehicle storage facilities.

How long can I keep a 10x15 unit?

Indefinitely. All standard self storage agreements are month-to-month with no minimum or maximum term. What changes over a long tenancy is the rate. Public Storage's FY2025 10-K says it typically increases rates to tenants who have been with it at least five months every six to twelve months, and that it sizes those increases by weighing the extra revenue against the risk of the tenant moving out. So expect a review roughly twice a year, and expect the argument that works to be a specific competing quote nearby plus a credible willingness to move.

10x15 vs 10x10 plus 5x10, which is cheaper?

The single 10x15 wins almost every time. Two units mean two administration charges, two lots of cover, two locks and two agreements, and the same fixed-cost effect that makes small units expensive per square foot works against you twice over. The exception is a site running a promotion on smaller units only, which can flip the first month or two and rarely survives past that. Get all three quoted on the month-two rate before deciding.

10x10 storage unit cost

The size below, and the most-rented one

10x20 storage unit cost

The size above, and vehicle-compatible

All storage unit sizes

5x5 through 10x30 with comparisons

Moving between homes

Duration and unit-size math

Climate-controlled premium

When the uplift is worth paying

What the filings say

The rent numbers you can check yourself