A self-storage deal can look great on paper right now. Occupancy across the industry is steady, the big REITs are raising guidance and new construction is slowing. Then you look closer and find that advertised rents have been falling year over year for eight straight months and that most of the occupancy strength comes from tenants who haven’t moved out yet.
That combination makes today’s market unusually easy to misread. The numbers in a broker package or a developer’s projections can be accurate and still point you in the wrong direction.
Here are seven things we’d stress-test on any self-storage acquisition or development in the current market, and why each one matters more in 2026 than it did a few years ago.
1. The gap between in-place rents and street rates
In-place rent is what existing tenants are paying. Street rate is what a new customer would pay to rent the same unit today. In a normal market, those two numbers are reasonably close. Right now they aren’t. Yardi Matrix’s September 2026 report calls the gap historically wide.
The reason is simple. Operators have been raising rents on existing customers while cutting advertised rates to compete for new ones. As long as tenants stay put, the facility collects the higher rent. Every time one moves out, that unit gets re-leased at the lower street rate.
Here’s a simple illustration. These numbers are hypothetical, not from a real deal.
Say a 60,000-square-foot facility is 90% occupied, and tenants are paying an average of $18.00 per square foot per year. That’s about $972,000 in annual rental income. Nearby competitors are advertising $15.50. If 30% of the occupied space turns over in a year and re-leases at street rate, the facility loses about $40,500 in annual income. That’s roughly 4% of revenue. At a 5.5% cap rate, it’s about $736,000 in value.
How to test it: Pull the rent roll and compare it to current street rates at the nearest competitors, unit size by unit size. Then model what happens as a normal share of tenants turns over.
2. Whether occupancy is coming from demand or from low move-outs
Yardi Matrix found that the industry’s year-to-date improvement in 2026 has come entirely from fewer move-outs, not stronger demand. With home sales and migration still slow, tenants are staying longer than usual.
That’s good for current income. It’s a problem if you’re paying for that occupancy as though it’s permanent. When housing activity normalizes, move-outs should rise, and a facility that’s been coasting on long-tenured customers will need to win new ones at today’s prices.
How to test it: Ask for at least 24 months of move-in and move-out data and average length of stay. A facility adding new customers steadily is in a stronger position than one that’s simply losing fewer.
3. Supply in your trade area, not your metro
Nationally, supply is slowing. Yardi projects 2026 completions will fall almost 19% from 2025. But that average hides huge local differences. As of August 2026, Phoenix had an under-construction pipeline equal to 6.2% of existing stock and Orlando was at 4.6%, while Minneapolis and Portland were among the lowest in the country.
Even inside a strong metro, one new facility down the road can change the outcome of a deal. And a facility that opened last year and is still in lease-up is often the most aggressive competitor on price.
How to test it: Map every facility within your trade area, including those under construction, approved or in the planning stage, and note which ones are still leasing up. Check with the local planning department, since not every project shows up in national databases. Our competitive analysis guide walks through how to do this.
4. Rent growth and lease-up assumptions
Projections built in 2021 or 2022 often assumed strong annual rent growth and a fast lease-up. Neither assumption holds up today. National advertised rates fell 1.9% year over year in August 2026, and climate-controlled rates fell 2.3%.
This doesn’t mean a deal can’t work. It means it should work without help from the market.
How to test it: Run a downside case with flat or slightly negative rent growth in the first year or two, higher concessions and a lease-up schedule longer than the one in the broker package or builder’s model. If the deal still meets your return and debt coverage targets, you have a margin of safety. If it only works in the base case, that’s worth knowing before you close.
5. Operating expenses, especially after a sale
Revenue isn’t the only line under pressure. Public Storage and CubeSmart both reported 4.4% annual expense growth in Q2 2026. Insurance, property taxes and payroll are the usual drivers.
Property taxes deserve extra attention on an acquisition. In many jurisdictions, a sale triggers a reassessment based on the purchase price, so the seller’s current tax bill may not be yours.
How to test it: Rebuild the expense budget from local quotes rather than the seller’s trailing numbers. Get an insurance quote early, estimate property taxes at the new assessed value and confirm what management and marketing will actually cost under your ownership.
6. Your basis and your exit
Stabilized, institutional-quality self storage in major metros has been trading around a 5.0% to 5.5% cap rate in 2026. Smaller facilities and secondary markets generally trade at higher cap rates, which means lower values for the same income.
A good purchase price helps, but it can’t fix a weak market. A facility bought below replacement cost can still be a poor investment if demand is thin or competition is growing.
How to test it: Don’t assume you’ll sell at a lower cap rate than you bought at. Model your exit at the same cap rate or a slightly higher one, and make sure the deal still works.
7. Local rules and one-off distortions
Some of the biggest swings in self storage performance come from things no national dataset tracks. In Los Angeles, wildfire-related emergency pricing restrictions capped rent increases for months. Public Storage estimated they’d cost about 50 basis points of full-year revenue. When they expired, LA posted the biggest month-over-month rate gain among the top 30 metros in July.
Zoning changes, development moratoriums, road projects that change access and a new competitor opening down the street can all move a facility’s numbers in ways a national report won’t catch.
How to test it: Talk to the local planning and zoning office, review any emergency orders or pricing rules and drive the trade area. The details that matter most are often the ones you can only find locally.
Why this matters more right now
Self storage isn’t a bad investment in 2026. Supply is slowing, the largest REITs are seeing move-in rents turn positive and institutional investors are still buying. But it’s a market where the difference between a good deal and a bad one comes down to local details that don’t show up in national averages or seller projections.
At BMSGRP, that’s the work we do. We’ve been in self storage consulting for more than 30 years, and we don’t build, broker, manage or sell anything. Whether you’re evaluating a new site or an existing facility, a Snap Report gives you a fast first read on the market, and a full feasibility study gives you and your lender an independent, detailed look at whether the numbers hold up.
Frequently asked questions
What does self storage due diligence include?
At a minimum, it should cover the rent roll compared to current street rates, occupancy and move-in and move-out history, existing and planned competition in the trade area, operating expenses rebuilt from local quotes, physical condition of the property, zoning and local regulations, and a financial model tested under conservative assumptions.
What’s the difference between in-place rent and street rate?
In-place rent is what current tenants pay. Street rate is the advertised price for a new customer. In 2026, in-place rents at many facilities are well above street rates, so when tenants move out, the replacement tenants often pay less.
How long does self storage lease-up take?
It varies a lot by market, facility size and competition. In markets with a lot of recently delivered supply, lease-up tends to take longer and require more concessions. Build your projections around a timeline that’s longer than the one in the broker package or builder’s model, and make sure the deal still works if it stretches further.
What cap rate should I expect for a self storage facility in 2026?
Institutional-quality facilities in major metros have traded around 5.0% to 5.5% in 2026. Smaller facilities, older properties and secondary markets typically trade at higher cap rates. Local market conditions and the facility’s income quality have a big effect on where a specific property lands.
