A new self storage facility opens with every unit empty and has to fill itself one customer at a time. This part of Storage 101 explains how long that takes, what it costs while it is happening, and how lenders and buyers underwrite a property that is not yet full.

Key takeaways

• Lease-up is the period between a self storage facility opening its doors and reaching stabilized occupancy, which the industry commonly defines as roughly 85 to 90 percent of units physically occupied and holding at that level.
• Lease-up ran about 24 to 36 months through most of the 2010s, compressed to 12 to 18 months in some markets during the 2020 to 2022 demand surge, and stretched back out to 36 to 48 months in oversupplied Sunbelt metros in the 2024 to 2026 period.
• Absorption is measured in net move-ins per month, and a 700-unit facility absorbing 15 net units a month needs roughly 40 months to reach 85 percent occupancy.
• Most new facilities cover operating expenses and debt service somewhere between 55 and 70 percent occupancy, and every month below that line is funded by an operating deficit reserve, an interest reserve, or additional equity.

What lease-up means, and what stabilization means

Lease-up is the phase in which a newly built or newly expanded self storage facility fills up. It begins on the day the property opens with an empty rent roll and ends when the facility reaches stabilized occupancy. Unlike an apartment building, where one tenant takes a whole unit for a year, a storage facility rents month to month to hundreds of separate customers, so the fill happens in small increments over a long stretch of calendar time.

Stabilization is the point at which the property is considered a normal operating asset rather than a development project. There is no single official definition, but the industry convention is roughly 85 to 90 percent physical occupancy sustained for a period, often three to six consecutive months, at rates the operator considers market rather than promotional. Physical occupancy is the share of units that are occupied. It is not the same as economic occupancy, which measures actual revenue against the revenue the property would collect if every unit were rented at full asking rate, and the gap between the two is widest during lease-up because discounts are heaviest then. Facilities rarely run at 100 percent, since even a mature property holds back vacancy so it can push rates, which is why stabilization is defined in the high 80s rather than at the top of the range.

How long lease-up takes, and why the benchmark keeps moving

Through most of the 2010s, a well-located new facility in a decent US market was underwritten to reach stabilization in roughly 24 to 36 months. That range became the default assumption in development pro formas, lender underwriting, and appraisal reports.

The 2020 to 2022 period broke that pattern. A surge in household moves, remote work, and home renovation pushed demand up sharply while deliveries slowed, and some new facilities in high-growth metros filled in 12 to 18 months at rates well above pro forma. The compressed timeline was then widely treated as the new normal and written into underwriting for projects that would not open until 2024 or later.

By the 2024 to 2026 stretch, the picture had reversed in much of the Sunbelt. Heavy deliveries in metros such as Dallas-Fort Worth, Austin, Houston, Phoenix, Atlanta, and Nashville landed at the same time that housing turnover slowed, and lease-up in the most saturated submarkets stretched to 36 to 48 months, sometimes longer. In those markets the binding constraint is not marketing effort but the number of competing new facilities chasing the same monthly pool of movers, a dynamic explored in the article on Sunbelt oversupply recovery timelines. Lease-up duration is a function of local supply and demand at the time of opening, not a fixed property of the asset class.

Absorption math: net move-ins per month

Absorption is the unit lease-up is measured in. It is net move-ins per month, meaning move-ins minus move-outs, and it is the most useful number in any lease-up report. Gross move-ins flatter a property, because a facility can sign 30 new customers in a month and still gain only 12 occupied units if 18 existing customers leave.

The arithmetic is simple and unforgiving. A 700-unit facility targeting 85 percent occupancy needs about 595 occupied units. At 15 net move-ins per month, that takes roughly 40 months, or a little over three years. At 20 a month it takes about 30 months, and at 10 a month nearly five years. Small differences in absorption translate into very large differences in how long the equity is exposed, which is why underwriters test a project at several absorption rates rather than one.

Absorption does not arrive evenly. The first months often produce a burst of move-ins from customers already looking, then a slower middle period, then a plateau as remaining vacancy concentrates in the unit sizes hardest to rent. Seasonality compounds this, since most US markets produce far more move-ins in late spring and summer than in winter.

Break-even occupancy and the cash burn

Break-even occupancy is the level at which rental revenue covers operating expenses and debt service. Below that line the property loses money every month regardless of how well it is run. Operating expenses at a new facility include property taxes, insurance, payroll or remote management fees, utilities, repairs, and marketing, and most of those costs are close to fixed whether the building is 20 percent full or 80 percent full. In Texas and Oklahoma the property tax line is often the largest single expense, and new facilities are frequently assessed on the completed improvement rather than on actual income.

For a typical new US self storage facility, break-even lands in the 55 to 70 percent occupancy range, with the exact point driven mostly by leverage. A lightly levered project can cover its costs near the bottom of that band, while a highly levered one with a floating-rate construction loan may not break even until it approaches 70 percent.

Break-even, not stabilization, is therefore the first milestone that matters. A 700-unit facility absorbing 15 units a month reaches roughly 60 percent occupancy in about 28 months, meaning it burns cash for well over two years before it funds itself, and only then begins the slower climb to stabilized.

What lease-up costs

That cash burn has to be funded, and in a properly capitalized project it is budgeted before construction starts. The two standard line items are an operating deficit reserve, a pool of cash covering the gap between revenue and operating expenses during lease-up, and an interest reserve, an allocation within the loan that pays interest until the property can service the debt from its own income. A project that underestimates either one runs out of money when occupancy is still low and no lender wants to refinance it.

Marketing spend during lease-up is also materially heavier than at a stabilized property. A mature facility might spend a low single-digit percentage of revenue on marketing, while a facility in lease-up spends several times that against a much smaller revenue base.

The subtler cost is discounting. First-month-free offers and low introductory rates are standard tools for pulling customers into a new building, and they work. What they also do is set a low starting point for in-place rent. A customer who moves in at 40 percent below street rate has to be walked up over time through existing customer rate increases. Two facilities can reach 85 percent occupancy on the same day with very different in-place rent rolls, and the one that bought its occupancy cheaply will take longer to reach the income assumed in the pro forma.

How lenders underwrite a facility in lease-up

Lenders treat a lease-up facility as construction risk rather than income risk, because there is no income history to underwrite. The common structures are a construction loan with a built-in interest reserve, a construction-to-permanent loan that converts to longer-term financing once the property hits agreed occupancy and debt service coverage tests, and SBA financing for smaller owner-operators. Each carries covenants the borrower must meet on a schedule, and missing them can trigger a cash sweep, a required paydown, or a default even while the property is still filling.

Equity requirements are higher for ground-up projects than for stabilized acquisitions, and they rose further as lease-up timelines lengthened. Where a stabilized facility might be financed at 60 to 70 percent of value, a development loan now commonly requires the sponsor to fund a substantially larger share of total project cost, including the reserves, and lenders in oversupplied submarkets increasingly size the loan to their own absorption assumption rather than the borrower’s. The mechanics of these loan types are covered in part nine of this series.

The pricing dilemma and the machinery that fills units

Every lease-up forces a choice between two defensible strategies. One is to fill fast at low introductory rates, get past break-even sooner, and rely on existing customer rate increases to bring the rent roll to market over the following year or two. The other is to hold rate, accept slower absorption, and preserve a higher in-place rent from the start. The first shortens the cash burn but depends on executing rate increases without triggering move-outs. The second protects revenue quality but extends the period during which reserves are drawn down.

Which choice makes sense depends on the competitive set. In a submarket with three other new facilities in lease-up, holding rate usually means watching customers rent next door; in a supply-constrained submarket it is far more viable. Neither strategy rescues a mislocated project, which is why site selection is treated at length in part six of this series.

Practically all of the demand a new facility captures now arrives through digital channels. Customers search online, compare nearby options on price and reviews, and often reserve without speaking to anyone, so paid search visibility and a credible review profile now matter more than street presence at most sites. Third-party listing aggregators supply additional volume in exchange for a share of the rent or a referral fee, and the large REITs run third-party management platforms that give independent owners national marketing spend, revenue management systems, and brand recognition for a management fee. Those platforms have become a common answer for developers who can build but cannot fill, and the tradeoffs are examined in part eight of this series.

New competition mid-lease-up, and buying a facility that is still filling

The most common way a lease-up goes wrong is that another facility opens nearby before the first one stabilizes. A new competitor with an empty building has every incentive to price aggressively, which flattens absorption at the incumbent and forces it to match discounts it had planned to withdraw. A facility absorbing 18 units a month can drop to 8 or 10 within a quarter. Checking the local permitting pipeline before committing is the only real defense, and the broader supply picture is set out in part three of this series.

Facilities in lease-up appear on the market regularly, usually because a developer has run through the reserve, and they are almost always offered on pro forma income rather than trailing income. The asking price reflects what the property is projected to earn at stabilization, not what it earns today. Reading such a deal starts with the absorption history for every month since opening rather than an average, because the shape of the curve reveals whether the property is accelerating, flat, or stalling.

Three other checks follow. The first is the gap between physical and economic occupancy, which shows how much occupancy was purchased with discounts. The second is the concession history by month, which shows whether absorption held up when discounts were pulled back. The third is the competitive pipeline, because a pro forma assuming 24 more months of clean absorption is worthless if two more facilities are scheduled to open in that window. A buyer taking on a lease-up is buying the remaining absorption risk, and the price should reflect that rather than the seller’s projection of a finished building.

What this means for a newcomer

Lease-up is where most self storage development losses occur. Construction is usually the predictable part. The unpredictable part is how many customers walk through the door each month once the building is standing, and that number is set by local supply and demand rather than by effort. Any project that is not already stabilized should be tested by asking what happens to returns if absorption comes in at two thirds of plan.

The two questions worth asking about any lease-up are how long the money lasts and what the rent roll looks like when the building is full. Reserves sized for a 24-month lease-up in a market delivering 40-month lease-ups will run out, and a facility filled on deep discounts will carry a below-market rent roll into its first refinancing. Both problems are visible in advance to anyone who examines monthly absorption and concession data instead of the summary occupancy figure.

For buyers who do not want that exposure, the alternative is a stabilized facility with a real operating history and a lower projected return in exchange for known income. The premium paid for stabilized assets over lease-up assets is, in effect, the market price of not having to guess at absorption.

This is part 7 of the Storage 101 series. Previous: Development vs. Conversion vs. Acquisition. Next: Operations 101: Staffed, Remote and Hybrid Management. See the full series at Storage 101.