Self storage rents small, unfinished spaces by the month and turns them into one of the most durable income streams in commercial real estate. This first article in the Storage 101 series explains where the revenue comes from, what it costs to run a facility, and who owns the industry.

Key takeaways

• Self storage is the business of renting small, unfurnished spaces on month-to-month leases to households and small businesses, with the operator keeping no responsibility for the goods stored inside.
• Unit rent is the largest revenue source, but tenant protection plans, administrative and late fees, retail sales, and vehicle parking commonly add 5 to 10 percent on top of rental income.
• A stabilized self storage facility in the United States typically runs operating expenses of roughly 30 to 40 percent of effective gross income, with property tax usually the single largest line item.
• Roughly 50,000 self storage facilities operate across the United States, and although publicly traded REITs own the best-known brands, most facilities are still owned by small independent operators.

What a self storage facility actually sells

A self storage facility rents small, unfinished, individually secured spaces to households and businesses on a month-to-month basis, and almost nothing else. A typical property holds between 300 and 800 rentable units ranging from a 5 foot by 5 foot closet to a 10 foot by 30 foot space large enough for a household of furniture, spread across roughly 50,000 to 90,000 net rentable square feet. The tenant supplies the lock, the contents and the insurance; the operator supplies four walls, a roof, a door, lighting, gate access and a month-to-month agreement that either side can end on short notice. Because nothing is built out for a particular tenant and nothing is stored on the operator’s behalf, the same unit can be re-rented within hours of being vacated.

That simplicity is the whole point. An office landlord signs a seven-year lease and spends heavily getting a suite ready for one tenant; a storage operator signs a one-page agreement, sweeps the unit and rents it again the same week. Newcomers moving over from apartments, retail or industrial should expect a set of unfamiliar terms, from net rentable square feet to economic occupancy to street rate, which are covered in Self Storage Terminology Every Newcomer Should Know.

Where self storage revenue comes from

Unit rent is the foundation, usually somewhere between 85 and 95 percent of total revenue at a stabilized property. Rent is quoted monthly and varies enormously by unit size, by whether the space is climate controlled, by floor level and by drive-up access. A 10 foot by 10 foot non-climate unit renting for $90 a month in a rural Texas market might rent for $180 in inner-loop Dallas, and priced per square foot per year it will often out-earn the industrial building next door.

The second revenue engine, and the one newcomers most often underestimate, is the rate increase applied to tenants already in place, known in the industry as an existing customer rate increase or ECRI. Because the lease is month to month, an operator can raise a sitting tenant’s rent with proper notice, and mature operators do so on a rolling schedule, often every 6 to 12 months per tenant, in increments that have commonly run from 8 to 15 percent or more. New customers are frequently quoted a discounted street rate or a first-month promotion to fill the building, and the economics only work because those tenants are stepped up toward market over the following year. A facility can therefore show flat move-in pricing and still grow same-store revenue.

Everything else falls under ancillary income, which typically adds 5 to 10 percent on top of rental revenue and carries very high margins. The largest piece is the tenant protection plan, a limited contents coverage product sold at move-in for roughly $10 to $30 a month, of which the operator retains a substantial share. Administrative fees charged at move-in, late fees and lien-processing fees add more, and delinquency handling is itself a meaningful revenue and risk item, examined in the article on delinquency aging and lien sales. Retail sales of locks, boxes and packing supplies, commissions from truck rental partnerships, and outdoor parking rented to boats, recreational vehicles and work trailers round out the picture. Vehicle and RV parking in particular can be a quiet profit center on land that would otherwise sit empty.

What it costs to run a self storage facility

Operating expenses at a stabilized facility generally land between 30 and 40 percent of effective gross income, and the spread within that range says a great deal about the quality of the operator and the tax jurisdiction. Payroll is usually the largest controllable line, covering a manager and part-time relief staff at a traditionally staffed store; remote and hybrid staffing models have compressed that number at many properties, a trade-off explored in the operations article later in this series. Property tax is usually the single largest expense line of any kind, and in states without an income tax it can be brutal.

Texas is the clearest example. Combined city, county, school district and special district rates commonly exceed 2 percent of assessed value, and county appraisal districts routinely reassess a facility upward the year after it sells, using the purchase price itself as evidence. A buyer who underwrites the seller’s historical tax bill rather than the reassessed figure can lose a large share of projected net operating income in year one. That mechanic, along with the protest and appeal process, is treated in detail in the article on self storage operating expenses and property tax appeals in Texas and Oklahoma.

The remaining lines are smaller but add up. Property and liability insurance has risen sharply across the Sunbelt, particularly in coastal and hail-prone counties. Marketing is dominated by paid search and listing placement, because most tenants find a facility online within a few miles of home. Utilities are modest at a drive-up property and material at a climate controlled one, where heating and cooling run year round. Repairs and maintenance cover doors, gates, asphalt, roofs and pest control. Management software, call center coverage and merchant processing fees are recurring technology costs, and a third-party management contract typically runs about 5 to 6 percent of gross revenue plus fees for call handling and marketing.

Why tenants stay far longer than the lease implies

On paper, every tenant can leave in 30 days. In practice they do not. Industry surveys have long put average length of stay well past a year, with a meaningful share of tenants staying more than three years and a long tail that stays for a decade. The result is a lease structure with the legal flexibility of a hotel room and the practical duration of an apartment.

Three forces explain the gap. The first is friction: moving out requires renting a truck, recruiting help and finding somewhere else to put the contents, which is far more work than absorbing a $15 rent increase. The second is that the monthly bill is usually small relative to household income and set to autopay, so it stops being a decision and becomes a background expense. The third is emotional. A storage unit frequently holds the belongings of a deceased parent, the contents of a marriage that ended, or a business’s records, and the decision to empty it is one people postpone. The durability of storage cash flow rests on tenant inertia as much as on tenant satisfaction.

Who actually rents storage units

The customer base splits roughly into households and commercial users, with households making up the large majority. Household demand is driven by life events, summarized in the industry by the four Ds: death, divorce, downsizing and dislocation, the last covering job relocation and any move between homes. A fifth informal category, simply having more possessions than closet space, accounts for a great deal of long-tenure demand in newer suburbs where garages fill up quickly.

Commercial tenants are a smaller share of units but often a better one. Contractors store tools and materials in drive-up units near job sites, sales representatives store samples, small e-commerce sellers store inventory, and local service businesses store seasonal equipment and records. Business tenants tend to rent larger units, stay longer, pay on time and complain less about rate increases, which is why operators in industrial-heavy submarkets often court them. Demand also does not depend purely on home sales; when the housing market slows, transfers between units and business use pick up part of the slack, a dynamic examined in storage demand without the housing market.

Why the sector holds up through economic cycles

Self storage earned its reputation during the 2008 downturn and reinforced it in the years after 2020, and the reasons are structural rather than lucky. Capital expenditure is low because there is little to wear out beyond roofs, doors, asphalt and paint, and there are no tenant improvements or leasing commissions when a space turns over. The tenant base is granular: losing 20 tenants out of 600 is a rounding error, whereas losing one anchor tenant in a shopping center is a crisis. Month-to-month leases that look like a weakness in a downturn are in fact the mechanism that lets rents reprice upward quickly when demand returns.

That resilience is not the same as immunity. Supply is the sector’s recurring problem, because a facility can be permitted and built in 18 to 24 months and new construction clusters in exactly the growth markets that look most attractive. Several Sunbelt metros, including parts of Dallas-Fort Worth, Houston, Austin, Phoenix and Atlanta, have absorbed heavy development waves that pushed street rates down for years. Occupancy, rate trends and the national picture are covered in The US Self Storage Market Explained.

How US self storage is owned

The United States has roughly 50,000 self storage facilities, more than the combined store counts of the largest fast food chains, and ownership is unusually fragmented. Publicly traded real estate investment trusts, including Public Storage, Extra Space Storage and CubeSmart, own and manage the best-known portfolios and set the tone for industry pricing, technology and disclosure. Their quarterly results are the closest thing the sector has to a public scoreboard, which is why operators read them closely; recent themes are summarized in the note on Q2 2026 REIT earnings.

Below the REITs sits a tier of large private operators and institutional funds, many of which use third-party management contracts to run facilities under a national brand without owning them. Even so, the majority of American self storage facilities are still owned by independent operators with one to a handful of properties, frequently people who bought land decades ago, built in phases, and manage the business themselves. That fragmentation is the reason acquisitions are still available to individual buyers and small partnerships, and it is also why financial records vary so widely in quality from one deal to the next.

What this means for a newcomer

The attraction of self storage is easy to state: a simple physical product, thousands of small tenants instead of a few large ones, low capital expenditure, and the ability to reprice the entire rent roll within a year. Those features are real, and they explain why the sector has drawn capital from investors leaving office and retail. They also mean the business is operated rather than owned passively, because revenue depends on daily pricing decisions, collections discipline and marketing spend rather than on a signed long-term lease.

The risks are equally specific. New supply within a three-mile radius can erase years of rate growth. Reported occupancy can look strong while economic occupancy, the rent actually collected against what the space could earn, lags badly because of discounts and delinquency. Post-sale property tax reassessment can quietly remove a large slice of net operating income in a buyer’s first year. None of these show up in a broker’s marketing package as clearly as the headline occupancy figure does.

A useful way to hold all of this is that self storage is a retail operating business wearing a real estate costume. The land and buildings matter, but the returns come from how tightly the operation is run: how quickly units are re-rented, how consistently rates are raised, how aggressively delinquent tenants are pursued, and how accurately expenses are forecast after a sale rather than before it. The rest of this series works through those pieces one at a time, starting with the vocabulary.

This is part 1 of the Storage 101 series. Next: Self Storage Terminology Every Newcomer Should Know. See the full series at Storage 101.